NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT
Edition: Model Aviation - 1987/09
Page Numbers: 24, 25, 26, 27, 28, 29, 30, 32, 124, 126
NO OCR TEXT NO OCR TEXT concealca stao arive oarey Snow slot center faring stabilator crashes spear-type landings rivalry between flat-wing poly hedral Sailpianes seems leveling out rivalry between flat-wing poly hedral Sailpianes seems leveling out mockup aileron linkage witn 1T5 quick disconnect feature L-shaped wires dropped belicrank holes connection cable rudder about 50/50 mix contest scene Flat-wing aileron Sailplanes inherently spiral-unstable therefore difficult fly well other hand maneu verability ailerons definitely better think once instability problem overcome through practice aileron Sailplane has edge precision/du ration events chose go flat wing Construction assumed builders Sailplane have minimum built other Sailplanes have good under standing basic model building skills Therefore rather give step-by-step instructions important unusual points will addressed An lo fiberglass fuselage can obtained either two sources Viking Models 26 Model Aviation note view wing inboard tip pin tube Ace wing lock wing rod tube aileron belicrank spoiler line Ballast slugs loaded through spoiler bay retained piece plastic foam Inserted bay spoilers use weight magnetic latch closing 10 Two-Meter offspring authors Standard-class Cailisto 82 featured October1982 issue ModelAvlatlon plan #383 10s contest track record has quickly established just much thoroughbred larger model sired modified Airtronics tow hook will installed aluminum hook has filed down allow tow rIng clearance inc Alrtronics releasable tow hook modi email block fixed bottom thefled text has details can mounted fiberglass hatch cover retains aileroninside fuselage rather outside connecting wires position pa per clip used hatch-cover tie-down aileron horns iniernai can ow seen bottom view wing panel ailerons hinged top leaving thlsnarrowasponthe bottomofthesurface Turnbuckies used veralon forfine aileron trim adjustment section tubing guides tow release pull string out way aileron rudder linkage servos starting trom front control stabilator spoilers tow hook aileron rudder Font compartment houses receiver switch harness NO OCR TEXT Dremel router tool run along temporary guide used cut out spar notches curved notches bestdone freehand Cutouts wing offset wing tube box webbing done hand tools USA 2026 Spring Lake Dr Martinez CA 94553 Bob Sealys Quality Fiber glass 521 96th Lane NE Blame MN 55434 Bob Sealys Quality Fiberglass also markets foam wing cores carbon fiber material used 007 x -in laminate laminate consists layer unidirectional car bon fibers embedded thin sheet epoxy material available various sources can bought -in-wide strips Bob Violett Models 1373 N Citrus Rd Winter Springs FL 32708 Buying way avoids having strip yourself other materials common items available regular hobby sources wing cores cut usual hotwire method tic marks tem plates take account leading-edge wing taper sure line up HAYES eEL LC RANK ACE WING LOCK I/4H O-L4NW WING ROD 3/32V6 MW WING TUBE F I/B INNER NYRI PIJSNROD BEAEP KEEPER -SPOILER TLSEI/EMW PUSHROOEND OF LW VERY rSBALSA WENG MAGNETIC SPOILER LsNI -LATCH B/3SOC- WING ROE1/IA PLYK5LNI/B BALSA 1/16 VERY BALSABALLABALLAST ACCESS114 OZ LEADSPOILER BU I/4S/B BALSAWEBBINGACCESSCAVITY-LIFf WIThSPOILER RETURN CAVITYI/IA VERY BALSAWEIGHT - WING PLAN RIGHT SIDE EJF / BEVEL BOTTOM WIECTING I/B PLY ACE WING LOCK OMITTED FOR @EdI ITY—— I/IA MWPUSIEVOS PUSHNODCHANNEL00 CARBON FIBER STRIP 1/4s 3/8 BALSA FILL WITH BALSA 1/16 PLYB EPOXYSECT F-F 3/32 A hr PRUCE SPARS CAPPED WITH 1/16 PLYWOOD007 V4 CARBON FIBER LAMINATE II --IHAYESBALSA END BELLCRANKSUPPORT I/4 1/16W 1/16 BALSA SHEETING TOP B BOTTOMBALSA TOT SHOWN FOR CLARITY IFOAM COREWING PLAN LEFT SIDEI/B IMETALS/3D 0 5 S/SD BALSAICLEVIGTUBE __A SPOILER 11/HINGE GM KLETTI HINGE PIN TAB NYLON AlL SECLINED IN NGTCAI RIBS HORNON T E UNGER HINGESECT / -__ ___ HATCH BLOCK TO RETAIN AlL UNKAGE IN WING BELLCRANKS-S/35 BALSA WITH PLY SPACER UNDERNEATH FIBERGLASSPAPER CUP BENT WillSNOTE CABLE TUBES B HATCH COVER10 FORM LOOP FORI/S DIA LOCIC NOT STOWN IN NOSE SI HATCH HOLD [lOiNBFOR CLARITY 450 MAHAF-IF-F-S CELLS RECEIVER IELEV ________SPOIL LLGE~ AIk.WIIO_________ IBERVO AHATOII HOLD DORNS/IAVDSPRIJCEBAIRTRONICSI/4SO BALSA SCREW EYESSERVO RAILSIDWHOOKCROSS BRACEEU S/IBsI/4SPRUCEANT TUBE TIll ARAILS \B00 IRNER NYROD AiiBATTERIES / RECEIVER HATCH COVER OIJflINE 0I03456 centerlines foam block Failure will cause twist cut wing panel Bevel core roots 30 root rib will fit flush fuselage method doing first prop up core correct dihedral angle root edge building table make few passes over edge sanding block Another way use hot wire across two 870 tem plates Spar notches cut core Dremel router tool method produces good-fitting spara necessity por tions shear webbing actually / TUBI4G SPOILER LINE GUDE RODBACK WING SCREW EYELOCK FUSELAGE TOP VIEW foam core Pin balsa strip core router guide Cutout portions core offset wing tube box wood webbing Try cut accurately parts will fit well use razor-saw blade re moved holder rough-cut flat Permagrit sanding blade finish Cutting accurate cavity round ballast tube foam core can chal lenging say least have best success method shown photos Make acutteroutofa1%2x 12-in brass tube Using file sharpen end tube cut teeth Make jig guide brass tube cutter 28 Model Aviation 00 1/4 EMBEDDED YE special cutter jig made cut out cavity cardboard ballast tubes // I/RODRUDDER CABL WING PINTUBE 3/32 TUBE0 D Full-Size Plans Available. See Page 170 WIDE CHAIBIELDIHEDRAL DETAIL 5, 2 BALSA BLOCK IMI/2BALSA LETIP-HOLLOW ASSECT J-J SHOWN____________ ThR COIFLERYES BELLCRAIBC NYLON1/16 PLY PLATFORM WITH CLEVIS5/32 BALSA SPACER UHOERNEATH V AI/4S CLEVIS \SALSASECT A-A B OCRFOR WING SKINS ICONTEST BALSAI_____________ MElAL yE BALSA SHEET rid1 \ 11W BALSA RIBS HORN SUPPORT NYLON AILERON HORN K LAMINATEI/4SG SLOT SKINS ATIN CORE IELLC ARK IRM METAL CLEVIS C-C 3/32 BALSA TDI/IA PLY ROOT RIB 3 TILT OUTBOARD ACE WING LOCK /41/2 BALSA LEADING EDGE ___AI SECT I-I SPOILER TUBE.. 1/16 PLY /// / /ZZ- 112 ID CARDBOARD ROCKETI/B PLY TIJ BALLAST TUBE 1/4 S/G BALSA V4 VERT GRAIN I/B MED HO BALSA BALSA WEBBINGSHEET SPOILER BLADE VIA I/B BALSA SPOILER BALLiZW BLADE END SUPPORT I/B OD BALSATUBE TUBESECT 55SHEETING CARBON FIBER LAMINATE BETWEEN WING SKINS FUSELAGE C SIDE VIEW 1/64 PLY OUTLIE 3/SSLO I/BPLY INSERT HORN MOUNT CBALSA1132 PLY FIBERGLASS FUSELAGETAILSEID1/IABALSA SHEET TAILBOOM FARING C FOAM CORE TEMPLATES WING TIP core proper angle cut hole core twist cutter hand applying slight inward pressure After cutter penetrates core short distance piece cylindrical foam must remove before proceeding will break off inside cutter Try some scrap foamit works spruce spars capped 007 x -in carbon fiber laminate clean carbon fiber alcohol bond spars slow-set cyanoacrylate CyA glue Handle laminate care carbon fiber has very wicked splin ters sure carbon fiber strip gets total VS BALSAF-2 PLY F-I PLY F3 SPECIFICATIONS WING SPAN.76- 514 WING AREA677 50 IN WING AIRFOILEPPLER 193 WEAHT -EMPTY36 02 BALLAST CAPAOTY24 0 WING LOADING RANGE61 -132 02/SO IN ALERON ThROW 5/B -LW AT TE RUDDER THROWI AT TE LEFT B RIGNY ELEVATOR ThROW5 1/2 AT TE SPOILER THROW* BO 007t I/4CARBON FIBER LAMYE SECTK-K I/BtIA SM KLETT HINGE RUDDER B AILERORS TOWHOOR CABLE BLEV CABLERUDDER CABLE ANTENNA TUBE SECT B-B 1/60 0 BRASS TIJBE S/rn SLOT CRIMP SIDES CABLE 3/3D0O BRASS TUBE SIDE FRONT STASILATOR DRIVE FITTING DETAIL B~ 1/2 STRIP GRET PLATE REW EYE LSA BLOCK IN PLY SIDE OUTLINE I/SD PLY3/32 SHEET ROOT RIB I/B BALSA I/BII 1/3 BALSA WRIET TIP mAILING EDGE AILERON HORN I. 3/16 RE BALSA LEASES EDGE--~ _____ 1/851/4 BALSA RIBS I/lBS 1/4VBOD BRASS I/BBALSA1/32 PLY NOTCH FORSTA ILATO SECT D-D I/BIII/4 BALSA SPAR 007 CARRIE FIBER TAPE TOP AND BOTTOM MODEL AVIATION I0 TWO METER COMPETITION SAILPLANE 0 BALSA HG 3/32 BALSAIfI/B53/B SHEET L64 PLY FIN / _____- BOTH SIDES--3/32 1/63/B BALSA BALSA// III 3/3D I/4RI/ Iz I/B BALSA GUSSET SHORTENED ThREADED COUPLER MOTE RUDDER SHOWN AT FUSELAGE CENTER LIRE glue coverage Any bond voids could cause carbon fiber separate spar under compression stress Build wing tube box lower spar shown photo upper spar wing tube box built upon lower spar put wing core CyA glue used sure has cured before placing foam upper spar will Installed later DESIGNED BY TERRY EDMONOS installed until later Use epoxy clamp assembly together upper spar used spacer Epoxy assembly cores very thin layer glue spread onto wood surfaces September 1987 29 core halves temporarily taped gether ply root ribs between locate wing tubes Fit accuracy paramount make sure everything right Temporarily fit left right cores together shown photo wing tubes installed short wing rod ply root ribs used positioning guides tubes tack-glued place core halves separated Fill wing tube box mixture hard balsa filler strips microballoons/epoxy mix Before mix sets up epoxy webbing top spar position place cores beds weight thing down until glue cures Make remaining cutouts cores linkages spoilers etc using router razor-saw Route out pushrod channels same way spar channels done Route out spoikr tube channel freehand because its com pound curves hinge block cavities also cut out router pre-notch hinge blocks prior putting sheet ing simplify chore later achieve satisfactory operation ailerons lo few points should observed regarding wing linkages Only small servo drives both ailerons rudder makes important wing linkages absolutely free-moving root belicrank mount should bev eled arm protruding root perpendicular root 30 angle reference wing bottom pushrod bearings must carefully aligned cause mechanical drag Pushrods should pivot easily bellcmanks slop clevis long pushrod adjusted inner outer bellcranks operate parallel other internal aileron horn inherently short-coupled makes throw sen sitive compensated throw reduction bellcrank arrange ment tends magnify linkage slop though soit important actual slop kept minimum Because proper installation linkage necessary produce proper throws attain tolerable rigidity plans quite detailed matter feel comfortable coping problem alternative would install standard external horns bot tom ailerons short pushrods Continued page 32 Left The notch long pushrod cut top core notch short aileron horn pushrod bottom Right spoiler bay has cavity ballast access another linkage Route recess remaining foam spoiler blade 30 Model Aviation wing tube-box filler webbing top spar epoxied place opera tion Ailowthe coreto cure thefoam beds long aileron pushrod music wire Nyrod bearings spaced along stiffening Left Carbon fiber laminate epoxied between wing skins trailing edge Spruce strips clamped TE keep straight curing Above Carbon fiber laminate similar substitute strengthening must applied stabilator spar-sides joinertubes built piece cut half r SIX SHOOTER FUEL PUMP NOW AVAILABLE FOR GASOLINE & DIESEL FUEL EITHER VERSION $1095 THE ONLY PUMP AVAILABLE FOR USE WITH DIESEL FUEL SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON OH 45013 513 738 1576 APPROX 6 oz per revolution HAND CRANKED FOR SAFE RELIABLE USE ATT-CHEK7 ON-Board Battery Tester Saves Time. Saves Models BATT-CHEK RX-1 $1495 USA U I] Will NW Install RC Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Prof une Corp 914 462-6452 PO Box 1 B08 Poughkeepsie NY 12601 Lets enjoy outdoorsin comfort WTYf~Your Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Quick Set Up Change Instantly Give Protection Weather Size 72x 120 60 sq tt Add units double triple etcthe size Porte-Shade available Add units can used trailer awnings patio covers efcl Pertu-S5ade Convenient size has no Center pole t5ere mere useable space can straddle prChiC table model airplane n Small vehiCle CanOpy 5 strong heat retleCting waterproet material lwhite top sidel unique tear proot Corner tininge no grommets stands ulmost 7 tall en strong t aluminum poles pea ____________________________________________________________[v32][b9856283311500]]can stand work play under comtort wind resistanttested 40 MPH Porta-shade very lust easy install beach picnic rnountanssr anywhere poe want protection tram elemems Set up very qaick person can about 5 minutes can adluoted easily tilt aqunst sun arid can eves set up venicully usa windbreak 4M Co Dept M 814 N Shawnee Dewey OK 74029 Phone 918-534-2244 Master Card Sportsman ModeSPFR4-60 $3995 PS Money Orders ks Oealer inqairien invitedEconomy ModeS EPFR4-60 $3295 e $3 UPS 10 quIckly established proven contest rec ord both Midwest National Con test circuits built John Cyr placed meet week after built exiting bottom wing Any kind wing-skin adhesive can used remember important add absolute minimum weight use Supertape because weighs practically nothing However have some minor problems small areas delaminating additional trailing edge strength strip carbon fiber laminate embedded between wing skins trailing edge glued epoxy top sheeting put Clamp trailing edge between spruce strips until cured ensure straight TE stabilator conventional built-up construction leading edge trailing edge tip need shinimed-up off building board proper height spars have carbon fiber laminate strips bonded both front back sides makes very strong lightweight stab eliminate carbon fiber some other reinforcing earlier stabs did have experienced structural failures during strong zoom launches ensure perfect alignment jointer tubes initially installed one-piece unit left right stabs cut Continued page 124 32 Model Aviation fin constructed balsa frame sand wiched between two 1/64 plywood sides Rudder conventIonal buIlt-up construc tion ply-insert control horn mount tip speed below finite value Taking bull horns club level wont picnic Ninety percent club will know what must done will willing whether means banning go-fast type contests until 90 dB achieved openers whatever other 10% wont take lying down will clubs ag gressive uninhibited verbose mem bers being competition-oriented have own network sort club within club knows pack meeting whenever crucial subject discussed voted competition aspect hobby have concern will well prepared have ways bat down arguments kid yourself thinking can reason grown men surely must have best interests hobby heart maybe better listen words Duke Fox prominent engine manufacturer upon returning con test Florida have spending quite bit time exploring ways make slightly quiet bit quieter really quiet two-cycle model airplane power plants purposes making trip find out whether interest quieter airplanes real whether just lip service am sorry report over 150 modelers talked Orlando single modeler wanted hear about amy slow catch am going spend time money promoting quiet case might feel differently 11 have compiled findings sound report will send anybody desires will send self-addressed envelope two stamps course will necessary remind some other competition fliers besides Don Lowe have tunnel-vision have heads sand will shrug say cant happen us sincerely have best interests aeromodeling KIT INCLUDES FOLDING FROP MATERIALS SELECT WOOD & FULL SIZE FLAN 36 R/IYJrfloclelSPOBOX 1059 ALAMOGORDONM 88311 whole hearts own club has couple compassionate responsible farsighted competitors have few pen-pals jumping stereotyping generalizing does nothing cloud issue hobby love survive have no choice impose quieter engines group standing way quieter en ginesor else curtail contest ac tivities Safety Preston Continued page 22 hand no pins used distinct like lihood entire prop will thrown off shaft should engine backfire reason another have previously published leEters readers suggested using prop nut locking insert prevent prop being ejec ted entirely off shaft Another solution drill small hole through end prop shaft cotter pin can inserted prevent regular prop nut spinning entirely off shaft shaft has hardened such hole cannot drilled conventional drill process mentioned reader letter Im unable find whereby hole can eEched through shaft electric arc process Maybe four-stroke-engine manufacturers might consider drilling holes ends prop shafts accept cotter pins Have safe month John Preston 2812 Northampton St NW Washington DC 20015 10 Sailplane/Edmonds Continued page 32 half after framing done stabs held fin common kinked jointer-wire method Check bends jointer wires throw stab halves out alignment other fin built up 3A2 balsa frame Y64 ply sides stabilator control tubing embedded frame Experiment best tube location putting cable tube trying different curvatures smoothest operation stab-drive fitting fabricated two simple brass tubes detailed plans 3A2 tube has Yl6in-deep slot cut end cutoff wheel form two tabs tabs flattened bent outward Y-shape formed around -in hori zontal tube cable crimped Y32 tube whole assembly soldered Final assembly begun fitting fin fuselage fiberglass fuselage tail boom will have shortened ap proximately 1 length shown plans Cut slot fin top fuselage tail boom slide control tubings fin place rear Position fin parallel sides wing-root fairing control tubings should glued fuselage side walls places possible Thick CyA glue can gravityfed down hatch opening long stick used hold tubes place glue cures tubes sub stantially secured along length tem perature variations can affect trim just Nyrod Fit stab fairing fin Adjust pivot tube position stab perpendicular fin Make sure stab fairing 00 incidence fuselage centerline design set up normal stab trim will very nearly fairing 00 wing fitted tack-gluing wing tube fuselage wing rod perpendicular wing fairing both ver tically horizontally Trial-fit wings fuselage point wing tail alignment should correct make adjustments wing rod tube inside fuselage compensate Fit ply root ribs wings careful shimming tight fit between wing fuselage very critical optimum per formance can achieved -in wing pin tubes installed make final align ment wing incidence Tack-glue wing pin tube fuse lage Use guide drill wing pin tube holes wing panels Make adjust ments tubes get equal incidence two wing panels can checked easily supporting plane two matched blocks under wings next fuselage incidence equal Continued page 126 1 24 Model Aviation r3/4 SCALE CLASSICSHigh Performance Rubber Powered 33 DEALER AND DISTRI tUTORCLOUD INOUIRES INVITED33 PLUS 8 MORE RUBBER POWERED MODELS SEND SASE FOR LITERATURE SHEETS Editorial/Waterman Continued page 16 DIGITAL Add 5200 tsr MULTIMETER OHMS LOAD PROTECTION iM fl BATTERY INDICATION Kii- BATTERY INCLUDED BLAIR CRAFT SCIENTIFIC INC 2087 New York Acence Hcnlnntnn Storms NY 11746 VISA 516 545-1571 o Free Price Sosting Boying Gcide Electronic GOODIES INCLUDING NICADS & CHARGERS O Enclsned roy ctreck ChargetornyOVlSA DMC DAMEX Acot C__________________ Cerd Holdern Name Name Addrenn trailing edge panel other will up off block modified Airtronics releasable tow hook allow mounted inside fuselage rather outside reduces amount drag produced tow hook Bevel lower frame edges Dremel grinder shown photo Cut slot bottom fuselage allow hook protrude inside Sand down fiberglass bumps inside fuselage area tow hook idea let tow hook set low fuselage possible Next file aluminum hook down point will allow adequate tow ring clearance Screws nut-plates mounted usual use capture feature /16-in wire pin has added capture latch fill gap made filing down hook use Super MonoKote finish surfaces except fuselage painted Whatever finish chosen sure keep weight buildup minimum Weight paint fuselage likely problem because its small surface area carbon fiber laminate shrinking covering wing can cause ripples develop trailing edge carbon fiber produces sharp dingresistant trailing edge does prevent becoming wavy thin airfoil have somewhat successful rec tifying problem clamping trailing edge straight between balsa strips reheating covering heat gun Radio installation will have follow procedure shown plans photos fairly closely much room variation because small space Aileron connect disconnect accomplished b-shaped wires servo engaging wing bellcranks connect ailerons wires simply dropped bellcrank holes wires retained position block bottom hatch hatch turn secured couple rubberbands stretched screw eye through paper-clip loop other screw eye inverted V-shape some planes have used small turnbuckles L wires get very fine trim ad justments ailerons Unfortunately nylon turnbuckles shown no longer available Metal turnbuckles could prob ably adapted same thing Proper aileron differential achieved selecting correct point connection servo wheel Start attaching couplers wheel near spot shown photo Fine-tuning differential done trial-and-error drilling holes wheel until right spot found Expect tuin couple wheels process spoilers hinged strip MonoKote ironed top side Spoiler lines made Goldberg YzA control line loops tied end slip over spindle servo arm spindle made eyelet attached servo arm lines threaded through screw eye guide directly servo spoiler end lines attached horns round toothpicks spoiler servo also pulls tow hook release nylon tube formed route line out way other linkage Ballast made up -in-OD x 2-in brass tube sections filled lead Lead shot can epoxied tubes melted poured tubes lead melted take proper precautionsmolten lead fumes deadly attempt absolutely certain what doing Trimming flying recommended control surface throws set initially per plans although throws may little sensitive some pilots Test fly would Sailplane Give some hand tosses get feel put up line Launches can highspeed moderately strong zoom re leases desired Experiment different trim settings find various usable speeds thermal searching thermal turning getting out sink Try out spoilers altitude very effective aware has very thin frontal profile tends dis appear coming directly going directly away distances too great can little unnerving model alternately ap pears disappears during thermal-turn ing certain positions way out simply takes some getting used also home slope capable riding smallest hills bal lasted flying strong lift highly maneuverable just plain fun fly Radio Technique/Myers Continued page 35 farm permission owner Flying stops few weeks year field being planted harvested small price pay ideal conditions enjoy rest year major attraction field near Spadaros airport includes Long Island Skydiving School As Tommy describes continuous air show what airplanes taking off landing parachutists floating down over place quarterscale models continuous action Hes right come GMAS field aka Grumman Athletic Association field Bob Aberle Tom Hunt Ron Farkas others lunchtime flying share space baseball diamonds soccer fields dogs golfers Fortunately other activities take place after work doesnt affect us As Grumman Corporation keeps building things field keeps getting smaller smaller As field diminishes size keep restricting size models smaller lighter packages what has prompted delightful 20-engined models have seen column time time also what has prompted Tom Hunt design Consortium 126 Model Aviation IORE POWEiITh WITH LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding fourcycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 leader quiet combustion 4 technology since 1976 J DCV ACY 05 LCD DISPLAY DCV 1OA iM fl INPUT