is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U
Edition: Model Aviation - 1990/06
Page Numbers: 66, 67, 68, 69, 70, 72, 191, 192, 196, 197
is change Its alreaay proven itself winning B Gas 1988 US Free Flight Champs ETerry Thorkildsen ORIGINAL ied 1985 has provei performer NFFS modE ma1 - asic aesign adJhq upscaled und 35quuuu - 11yirnreIther B class lmpIe engine nge A-B As#ostar Because signiflcnt power output two K&B engines Id obviously ha make structural changes larger Astrostar avoid wing flutter Since model would S Micafilm Which ilms has little - - Iity compa Both Terry A-B Astrostar air borne Vigorous critical difference partlcL CA Free mpensate spruce main spar shear webbing also moved heavier main portion wing struc ture forward spars shear webbing would structurally effec tive prevent wing flutter save weight demonstrate yourself forward Left The black stripe rudder strip reinforcing carbon fiber Theres side provide rigidity plans show other critical stress points models structure Its used Note rubberbands retaining tensioning stabilizers leading edge DT limit line nonstretch Dacron line passing through guide tube under rubberbands Right stabilizer its DTd position Left The finished rudder pylon fuselage subassembiles Note doublers forward end fuselage around DT tube hole extra strength Right DT timer mounted Dr Scholis pad help reduce vibration baby pacifier used feed fuel Schnuerle engine side-mounted DT mechanism makes easy check all-important fuse length just prior iaunching model June 1990 67 author starting A-B Astrostar safely behind Ear protection almost manda tory firing up unmuffled engines weight improves stability try putting pa per clip piece paper rotate Two identical Astrostars finished other bare bones displaying geodetic struc- either direction Youll notice its sta ture provides torsional rigidity required flight speeds model encounters ble paper clip lead ing edge spars shear webbing form load-bearing I-beam structure wing Locating forward widest part ASQMARSI BALSA TSP SIB3/8 SQAARSI BALSA EABNG EDGE ITRIIASEBTAA A7 11IL IIIIL I\VV\VIJ1LI__I /A S0 I/ARM B ALSA TOP SPAR IN TIPS BOTTOM S3/SSPS 5 B/ WINS ONB2 ARE 332SSETIEALSASLBT MAIN STAT AIMS ARE S/32ISOFTIBAAA SHEET GETTEr-C SIAM RIBS ABE /15/SOFT BALSA SHEET II SO SA SEP CAL 115-/OS SHEET H INS H 425 OFFSET MOTOR MOJNT DETAIL L /SSAATBEE TOP CENTER PANELS I/SSESERJCE STITCH I/AlT SPAR IICILIS-ITISSEES BASA SHEAR WEB BIT//EON S/ASS TA Sr/SI /A /A7/ SPAS TOT SIT IE S-EAR /5 S -I-zr-S/I&IMEA/-AROI BALSA S/AFT OR BECES OF /A ShEETE /5 LAMINATES MELON HATS MAnNA IA sAR SHEET / CSL1__ IN 3/BBPDIr BALSA TB/ANGLEIITBTDRT I/BSQSPRBCE I II III 4 PET- I I/B SOFT PLS /64 PLY3/TA BALSA 055 BEER SIA MAST WIRErTIMER S SE K&B 35 engine back-mounted using homemade unit cut flat piece A-in sheet aluminum plans fully detail construction lightweight mount guide tube OT limit line posi tioned using length piano wire before gluing piece / ply reinforcement wrapped around fuselage help carry rubberband loads Note small rein forcing gusset under stabilizer platform ribs creates larger stronger I-beam youve reached intermediate level building skill dont intimidated geodetic construction Construction A-B Astrostar fairly straightforward following plans instructions should produce very favorable results model 600 sq weighs 20 23 oz size-to-weight ratio has worked out quite effectively Most flying Taft CA under Category Two conditions also enjoy flying Astrostar Category Three flying sites cause its size construction tech niques used aircraft stays trim no matter what field weather conditions Micafilm covering wont go limp dampness Ive flown model worries under slight drizzle conditions well usually-damp early morn ing unlimited flights popular West Coast model built sufficiently light dont have make changes Cate gory Three flying would suggest build recommended weight best results help make task little easier have listed recommended sheet stock weights various areas model Following recommendations will give all-up weight similar Its important nothing given free ride building competitive Free Flight model standard aluminum engine mount example can cost much 75 oz Included plans details lightweight aluminum back mount engine Its easy make saves weight model size dont have go extremes would building AA ship its still good idea use care selection wood finishes glues order competitive possible Thats reason use light weight Micafilm covering Its also fuelproof resists puncturing As already ex plained Union Jack geodetic construc tion together spruce spar shear / CASBON FIBER CARBON F BER\ /D SOSPRUCE rop CENTER PANES /N\V$~_/\ IT F GOPLYCABBO\N5/32 BALSA FIBERI/BA PLYSHEET -3/B 1/SO BALSA STRINGERS 3/3/ 551 SA SAFE FJSEAGE SECT _ _ L I/A SO BS5A iMLE3/33 BALSA LSTET LEASING ETE71~ iT7 NTJII/IE N B Full-Size Plans Available Page 204 3/53 BALSA SHEET A/NO SIPS /VZVIAII ii __ I11 ____I zjNZ 41 GRATING EDGE 1/16 BALSA SAL/i STAB TPS I/IF BALSA SAEET ISOFT GEODETIC BIBS 3/32P5 STABILOER MOLNO NO PIECES 3/1A3/32 BARD BALSBI/Il ik ii ILL 3/32 BALSA SREETIMEO/CARBONillIii// FUSELAGE TOP SIDES BOTTOMFIBER/I//1k 3/32 BARD BALSA/1 /7/ Ik 7SABETIMED 3/30 PT//3/32 BALSA 303 BEB I/1 TUBE FOR ST LINEWAlI3/B 3/33 HARD 3/32BLAMNLM/64 PLOASA/TTBALSA TAILSKID S/B SIA SPECIFICATIONS SLAM BUM TSBE WINS SPANATArnFAJ 0I23ANBBINS AREASOOGOINGESISNED GRAWNEG STAB AREAID ODINBT FUSE 3/NAGS ASSTERBS THORA 3/SEN 5/13/AS made using Xerox machine could blow drawings up down will after structural changes larger model worked out As already de June 1990 69 webbing produce strong warp-free struc tare substantial inherent rigidity offset ting low torsional rigidity cover material airfoils moment arms stabilizer percentages scaled-up Astrostar identical version fact ba sis first 600 Astrostar plans Left Kit wing first cutting out wing ribs using tempiate made 1A6-in hard baisa backed up 1A4 piy Right wing built sections fiat over plans geodetic ribs place prior cutting notches turbuiator spars Notches trailing edge rib ends provide strong joint weight penalty Lead weights used hoid everything fiat true Left A straightedge X-Acto knife used cut notches geodetic ribs notches sanded correct depth tooi seen photo its simply piece I/ x %-in spruce strip sandpaper giued its narrow edge Right After giuing center dihedrai joint piace Zona saw used carefuiiy cut siot center rib fuii-depth /32-in piywood center brace giued against side 1A x 1Am hard center spars provide tough center wing section Strips carbon fiber reinforcements visibie Left The completed wing center section Note spruce main spar shear webbing strips carbon fiber top spars absorb shock DT landings Right compieted poiyhedrai break ieft wing Again notice carbon fiber reinforcing gussets scribed wing particular strength ened redesigned greater stability resistance flutter model uses carbon fiber reinforce dihedral breaks center dihedral break backed up %2 plywood well Notice carbon fiber also used top spars center protect against shock DT dethermalized landings rudder stiffening strongly recommend stick carbon fiber beef up model ap propriate places stay away bo ron potential health risk handling bo ron cant possibly justify its usage com petitive Gas model type wing built flat except small amountabout 3A2 inof washin right main panel washin should built warped later Union Jack geodetic construction will help lock built-in warp place faster model flies less washin needed since no auto surfaces washin shouldnt eliminated entirely No wash out used tips dont recommend fast-moving model since its effect changes function speed center-of-gravity CG positioned 76% fuel ensure CG correct pylon location bottom fuselage established pylon glued after model completely sembled produces exceptionally strong joint gives pylon extra rigid ity add piece A-in-sq spruce front pylon avoid nicks stress cracks seem develop time fuselage uses %-in-sq balsa string ers running full length four corners provides exceptional strength-toweight ratio technique eliminates need bulkheads add tail front stabilizer half-bulkhead DT dethermalizer tube making easier establish correct fuselage width prior gluing top bottom half-bulkhead also gives DT tube necessary rigidity case tight DT fuse should have forced through finished fuselage doped ni trate followed couple thinned-out coats clear K&B Super Poxy Aniline dye added nitrate dope vivid translucent coloring effect Since Super Poxy Micafilm prevent fuel soaking Astrostar wont become models gain weight longer theyre flown Using rear rudder gives airplane consistent power pattern stabi lizer alignment becomes less critical model definitely seems groove better properly aligned wing other hand critical consistent flying con vince yourself simply cock wing viewing model front watch changes washout washin rotate align dowels center dihedral breaks drag-free flying dowels also offer advan tage popping out slot hit hard obstruction front stabilizer also aligned prevent flat spin stab becomes cocked model de thermalizes fly Astrostar right-right can trimmed right-left desired pre fer right-right pattern never fight model shows inclination glide leftward other check warps Its good idea time glide circle make sure isnt too small too large large glide will rack up better time dead air will cause model fly out thermals whereas smaller circle will cen Continued page 72 70 Model Aviation FUEL WIZZARD THE WORLDS FASTEST AND MOST FUEL PUMP EVER * FITS ALL GALLON FUEL BOTTLES * FAST ONE STROKE LL OUNCE OF FUEL * ALL FUEL SAFE GLO FUEL & GASOLINE SUGGESTED RETAIL $995 NOW JUST $750 CONVENIENT SEE YOUR DEALER OR ORIER DIRECT PLEASE ENTER MY ORDER FORFUEL WJZZARDS AT $ 750 EACh POSTAGE PAID NAMESTREET_______________________ CITY STATE________________ ZIP_________ ORDER FROM ACME PLASTIC PUMP CO P 0 BOX 24551 MINNEAPOLIS MN 55424 IEALER INQUIRIES INVITEI1 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300 BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 Dynamic Duo Durability Stand Ready Help Take Encounters Planet Earth DuraPlane II 25-size 3-channel basic flight trainer scuffle ground isnt some thing should have face own may have gotten own dont think model should stand After two team So join up airplanes thatll stick through thick thin Duracmfl Inc Y 1007 Orc9wd Grove 11w Royal O NI 48067 DuraBat 40-size 4-channel aerobatic trainer ter easily thermal glide circle 25 35 seconds recommended Astrostar Although model uses no downthrust 15% left thrust shown plans added eliminate initial bank right As model picks up speed later power stages thrust adjustments lose effectiveness rudder rudder tab increase importance Also its imper ative flying surfaces warp free eliminate trim changes differences speed Ive scaled up Astrostar 850-sq size well still get biggest kicks flying 600-sq-in version coupled K&B 325 35 engineprobably direct function raw power Schnuerles A-B variant truly fa vorite Astrostars Construction best performance its im portant build Astrostar approx imate weight 20 23 ounces indi cated wont difficult achieve use recommended weights wood eschew heavier covering materials careful keep finishing light espe cially wary excessive weight stabi lizer Simple laws physics tell us will take lot weight nose compensate tail-heavy model Just important building model thats strong lightweight building model thats warp free build air planes special plank has trued up provide flat surface straight wellcrafted model performs consisteptly over range speeds Wing Build panels flat except right main panel should have about %2 washin outer dihedral break wood wing should straight true Use lightweight /32 sheet balsa B C grain possible ribs Density should range about 44 52 lb/cu ft have ac cess gram scale 3 x 36-in sheet should weigh 115 135 grams Cut out ribs prior beginning construction neat rib template can made cut ting rib outline hard balsa back ing l/ plywood sanded down till matches rib shape uni formity make both bottom spar notches ribs still stacked together after being cut out can also make notch es main ribs top spars point geodetic ribs notched until later Build panel separately beginning laying down bottom spars lead ing trailing edges Use medium-weight balsa leading trailing edges al ways cut notch trailing edge rib installed help compensate differences ribs apd prGvide gluing surface leading edge made %-in-sq stock slightly trimmed down vertical dimension match Continued page 191 72 Model Aviation FILLS THE LARGEST MODEL FUEL TANKS IN SECONDS Computer Designed3 Axis Control * Part 1 03 Ultralight Easy Construction Wood Construction WA wodisat loss Now available ty Lite. workis first premium grade Ight plywood Mighty Lites ultra smooth grain finish slows ilmited filing vwtually no flaking saving hours precious building time Mighty Ute bonds eas0y ZAP other CAs cuts Ike butter X-ACTO knife Shattering spintering warpin mildew thing past Mighty Ute8 qualty formula tion currently being used leading manufac turers including BOB VIOLETT MODELS HOUSE OF BALSA because its superior strength-to-wsi~ ratio SO youre tired shattering experiences next time right. use Mighty Litel / MIg$ Lit House S rse* info Epurprisee 20130 State Road etritoa caafomiseOlvl2460 SW 65th brace Davie Fiosida 33024 213 860-1216 4732211 Mi0ty LheieaiatbUsr hobby storee everywhere may oatsr ot hum regiofial saline office neareat engine amount tip weight decide use Kids/Haught Continued page 65 make feel investment work though cover costs kids funds never turned away couldnt pay given little jobs work off cost models Imagine having mow lawn whole year As models got expensive found buying balsa bulk helped Bundles balsa became rule fellow modelers whod heard about group quick help Some sent stacks balsa left car others mailed rolls tissue paper no charge Thanks Greg owner hobby shop St Cloud visited business trip gave us box old Cox 049s props wheels gold helped kids couldnt afford engine get Con trol Line flying big project spring series Control Line Top Fun models So far 12 have finished flown After 20 flights pilots earn Ace status re ceive AMA medal get choose model own build 17 kids started day last fall 15 have stuck out Theyre already skilled modelers Control Line Free Flight fliers Much surprise two girls club still us enjoy much boys game plan now get accustomed flying two pilots circle lead ing up Mouse Racing fall /2A Combat us have wonder ful time learned lot others think might willing tackle project sort let offer some pointers Plan having fun Dont too intent making mainly learning experience try keep loose fun Dis cipline importantthe kids need learn respect tools materials theyre working Keep affordable Keep projects objectives simple reasonable Try assemble file poten tial projects well ahead time Use nat ural leaders faster builders helpers Make up workbox modeler Use shoebox like fill knife emery board pins glue etc Share fun have similarly clined modeling friend together Meet ing regular time place essential Most important relax have funand re member what youre giving kids Id glad answer questions might have Dave Haught 302 West Main Ceylon MN 56121 Good luck keep em building Astrostar/Thorkildsen Continued page 72 ribs / x %-in main bottom spar spruce other bottom spar /8 x A-in hard balsa Install main ribs except dihe dral breaks Fit glue / x A-in balsa top center spar Install geodetic ribs sanding ends required good fit Notch geodetic ribs top turbu lator spars dont install spars point youd need cut front geo detic ribs half cut notches straightedge X-Acto knife using main ribs guide notches sanded correct depth usJune 1990 191 Thin plywood enclosing nose out ermost outboard wing rib bay serves container lead shot used adlust tip weight optimum slow-flight perform ance nylon screw plugs access hole Performance Speclaltlem owned operated World Pylon Racing Champion Dave Shadel customize maintain majority high performance engines used todays racing enthusiasts addition work racing engines also repair customize 05 Supertigre engines well providing warranty service repairs Bob Violett Moders KBV 72 82 complete line Webra engines custom engines used some top aerobatic racing pilots world interested World Class performance please contact us weekday between 10 am 5 pm West Coast time Well look forward hearing Please send $100 descriptive brochure Visa & Mastercard accepted Aircraft Racing Headquarters PERFORMANCE SPECIALTiES Custom ABC Piston / Cylinder Assemblies True Chrome Plating Higher Performance & Longer Wear PfrfarMaweSpecfultiea QUAUW RADIO COMEt otru Available K&B 65 75 05 40 VFNRP 0S 61 FSR 05 61 VF OS Long Stroke 61 Rossi 40 65 81 Supertigre X-40 YS6OFS/FR YS Long Stroke Others Coming Soon PerformanCe SpeCialties PO Box 4003 Carlsbad CA 92008 619 729-1658 ing piece sandpaper glued edge /8 x % x l0-in-long piece spruce Glue wing panels together taking care establish correct dihedral keep everything straight true %2-in washin right panel Glue main ribs followed geodetic ribs dihedral breaks After ribs installed add A-in-sq turbulator spars spruce center panels hard balsa outer tips sure again wood straight true After gluing spars install shear webbing between Use very lightweight /16 balsa extend shear webbing way out tips except between spruce main spar last rib bay Notice does run way out tips balsa main spar make webbing effective try center pieces between spars especially measuring / x n should run vertical find best cut out number webbing pieces 3-in widths sheet stock after measuring gap between I I I I I I _____I II II II II II II II II II II II II _____________ ___I RETURN WITH CHECK OR MONEY ORDER ONLY TO PIN-NIK SALES PO Box 647 Ravenna OH U266 L Washable Rugged Cap Sunglasses Flip Up/Down Adjust In/Out Snap On/Off Imprints Available Ultra Violet Protected Please send _____________ caps Ive enclosed @ $795 plus $2 shipping handling Lens Colors 0 Amber 0 Smoke blue Cap Colors S Black 5 White S Yellow S Green S Navy blue S Royal blue SMaroon tilJGrey El] Red S Please send information about imprinting IPLEASE PRINTI Name Address city stateZip spars Use 007-in carbon fiber back up dihedral breaks main spruce spar leading edge trailing edge uses carbon fiber center dihedral break full-depth A2 plywood center brace glued against side / x A-in hard center spars reinforce center sec tion install center brace saw through main rib Zona saw Its well worth effort extra strength provides center dihedral break upper surfaces top spars covered carbon fiber protect against DT landings /16 planking installed withstand abuse rubberbands Add 3A2 sheet angle tips along gussets dihedral breaks complete wing Stabilizer Construction similar used wing stabilizer built lighter avoid tail-heavy model main ribs made lightweight 342 balsa sheet having same density FIBERGLASS PARTS Carry over 300 Cowls 70 wheel pants made epoxy glass light weight brittle zero pnholes Send SASE $100 latest Catalog T & D FiBERGLASS SPECIALTIES 38624 Mt Kisco Sterling Hgts Ml 48310 Call Us 313 978-2512 *New Owners * Steve & Kim Durecki balsa used wing geodetic ribs made lightweight t sheet A6 x 3 x 36-in balsa should weigh about 8 9 grams Use hard straight balsa spars As wing its important install front geodetic ribs before adding front A-in turbulator spars Notice two center ribs sep arated small gap allow room front 342 plywood key usually add piece carbon fiber down side ply wood key help guard against breakage Add DT wire rear stabi lizer bending S shape its glued trailing edge Cover wire small piece silk reinforcement Fuselage Select medium medium-light 342 balsa sheet avoid splicing body use piece 3 x 48-in stock should weigh around 23-24 grams Install A-in balsa stringers run full length four corners add /32 balsa reinforcement between corner stringers front timer side also add doublers either side DT aluminum tube inserted front usually extend balsa doubler back 5 timer side about 2 3 far side Install bulkhead DT tube fit glue bulkhead front sta bilizer Temporarily glue bulkhead firewall location assist establishing correct alignment next step Cut top piece slightly oversize lay flat surface Apply thick Hot Stuff Super T equivalent cyanoacry late CyA glue top side stringers carefully attach top sheet Glue bottom similar manner method creates strong straight fuse lage Cut out rudder medium-weight /32 sheet making sure grain ori ented correcfly usually apply strip carbon fiber side bare rudder before installing ensure its nice rigid rudder installed between two sides rear fuselage Sight down fuselage make certain no rudder offset accidentally glued dur ing operation Conhnued page 196 192 Model Aviation FI II II II ASSES YESI Please send me copies RADIO CONTROL BUYERS GUIDE Price pet copy 512951#12086 E check enclosed E Charge credit card Charge E Mastercard Card # Exp date City State Zip Include postage handling US $1 50 Canadian foreign add 15% minimum $300 Make payment US funds Wisconsin residents add 5% sales tax 0110 Astrostar/Thorki Idsen Continued page 192 Run /32 balsa doubler between string ers both top bottom inside front fuselage extending back about 25 Install blind nuts back firewall being sure place candle wax keep glue out threads Glue firewall place using thick CyA sand blend fuse lage Glue piece /6i plywood timer side wrap another piece around fuselage under stabilizer platform durability Reinforce firewall O5-oz glass cloth extending back about inch gluing stabilizer plat form place usually induce little right stabilizer tilt since always glide Astro stars right pylon constructed two sheets /5-in medium-hard balsa laminated grain offset slightly give total thickness tA also reinforce area wing platform glued py lon 3A6 triangles extra strength Silk added front rear corners pylon prevent stress cracks order establish correct center-of gravity location 76% no fuel py lon installed until after rest model has completed Once CG accurate pylon glued bottom strong joint no bulkheads Trial fit pylon position before gluing place sight down fuselage rear make sure its good alignment ensure accuracy generally mark pylon location front center fuselage using long straightedge Covering using Micafllm must first apply glue framework use thinned Balsarite ribs spars 3M 77 spray adhesive leading trailing edges 3M 77 offers advan tage staying tacky long enough Micafllm placed position before edges ironed down Its important lay covering over framework smoothly tightly possible Get close wrinkle-free can Cover bottom side wing first top portion covering should over lap bottom about /s Seal overlap joint Balsarite thin CyA Use iron tighten covering first dium setting going over entire panel hottest setting Its important get covering tight possible Go over finished panel iron once make sure material fastened rib spar helps make wing rigid possible avoid wing flutter dont want bother Micafilm silk will work just fine Some model ers prefer double cover Japanese tis sue Both silk tissue offer quite bit strength excellent torsional rigidity either coverings paint three four coats thinned nitrate dope followed two coats fuel-proofer butyrate dope silk use throwaway foam brush local paint store ap VEND MOUNTS VIBRATION KILLER Felt end fuel proof fOfl boSs isolet ion tot 25 fdd engineS es-ooe Fits olttustly titeseeft flsfls 70% MAo 55% Ift kit COnSiStS nouflts isolate tout points reSound ,t wasItots tubing iflsttontiOns bend 51205 otteok storet odst OI~L mounts Typical tibtetion tsduCtion t0 kit SLA PtSOSIICT5 #0500 35525 SARASOTA FL 34233 5t33774252 FL tssidettts add its sates let INFORMATION send SA5E Bob Fiorenzej Hobby Center Inc Dealer tot Yellow Aircraft UPS Orders Shipped osily Now Availeble Fosteove Cove ng Ms e Z Visit Out Showroom 135w n ow 0 sosy World NEW Cuotom Boildiog 5srvtce 420 West SR 4344071327-8383 Winter Springs FL 32708Fax 14071327-7148 196 Model Aviation Name Street Kalmbach Publishing Co. PO Box 1612 Waukesha WI 53187 N E Visa ZENOAH SACHS-DOLMAR & QUADRA ENGINES ERCOUPE TOMAHAWK & J-3 KITTEN KITS ZINGER & DYNATHAUST PROPS FUEL TANKS Carbon-Fiber Arrowahafta Ceconite & Glue DGA & MGA PILOTS Send $100 catalog JIM MESSERS QUALITY MODEL PRODUCTS Valley View Dr. Box 43 Allegany NY 14706 10 FT B-17 PLANS $4200 Epoxy GLASS COWLS PLASTIC ROSE TURRETS 955 55 POWER4x40451~At\ 3 CATALOGS 5900 THE BEST IN ScALE-BOB NOLMAN PO 505 75t Ma SAN SONG CA 52442 ply dope will fill faster less overall weight Flying Allow finish cure week before checking warps remov ing may have developed Make sure wing properly aligned Test glide model adjusting incidence necessary until nice floating glide achieved Double-check CG location major cor rections incidence required Locating CG 76% fuel works out well model stabi lizer size prevents Astrostar go ing over top will tail-heavy model prevents excessive looping some times seen nose-heavy aircraft An tutely chosen CG location can effec tive means fine tuning power glide phases flight cant ac complished incidence corrections alone Dont afraid put Lite Ply spacer behind engine add tail weight necessary move CG its correct po sition Use pacifier pressure fuel tank con sistent engine run set timer 253 seconds model should climb steeply slight right turn Correct adverse turn tendencies rudder tabtrailing edge stock glued rear rudder Slowly lengthen engine run until full limit reached Properly trimmed model will make couple turns 12 sec onds smooth transition floating glide Once model properly trimmed ready contest flying would recom mend making first three four flights early day possible air nice thick Pay attention rest models thermal activity looks promising enough begin flyoff flights Picking good air acquired skill watching other fliers seem win lot can speed up learning process can flying versatile de pendable stable Free Flight model Im sure A-B Astrostar will bring much pleasure has given Product Sources Bradley Model Products 1337 Pine Sap Ct Orlando FL 32825 Jacks Models 7178 Aumsville Hwy Sa lem OR 97301 Kustom Kraftsmanship Box 3010 Fallbrook CA 92028 MRL 25108 Marguerite Pkwy B-160 Mission Viejo CA 92692 Curtiss XF1 3C/Schuette Continued page 81 bottom fuselage rubberbands positioned forward tail hook tension rubberband hook down Use small rubberbands Insert tail hook through doublers -S EEmmmmmmmmm SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINTUART GALLON 35% Nitro9 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromothane$1325 15% Nitromethano$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselftonces noblect change withoot notice See dealer first available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 solder washer opposite side fuselage Apply drop medium CyA tail hook doubler stop-holes doublers harden Screw 4-40 bolt through holes screw enters tail hook side passes through fuselage ends flush outside edge dou bler other side Use #2 x 3A-in screws mount fuel tank fuselage Mount main landing gear lock place A-in nylon landing gear straps 4-40 bolts nuts Use Glenn Lee 1 /2-in-dia racing wheels similar type Solder inside washer onto landing gear axle slip wheel Put small piece sandpaper litI I I I I I I U U U I I U U I I U tle larger washers used over landing gear wire solder outside washer onto wire Remove sandpa per between washer wheel Re peat other wheel help smooth out throttle response during low-speed flight throttle arm lengthened full movement bellcrank required fully open close carburetor Remove throttle arm carburetor Cut 34 -in-long piece Y32 brass tubing flatten fit over throttle arm Sand file off anodizing throttle arm extension will soldered Place flattened tubing over throttle arm continue flattening un til its tight against throttle arm Solder throttle arm extension place June 1990 197 U U U U I I I U U I I I U U U I I U U