NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I
Edition: Model Aviation - 1990/08
Page Numbers: 46, 47, 178, 179, 180, 181, 182
NEW BIRD months column bit unusu a] because 80% devoted single item Frank Westons description designed built beautiful big Terminator Unlimited class Sailplane Frank lives Arnold MD member Capital Area Soaring Associa tion CASA first read Franks article CASA Comments newsletter edited Gus Peleuses hit significant piece writing deserved shared Sailplaners dream designing own supership got right phone ask reprint permis sion beauty Franks description takes step step through thought pro cess Frank trained aeronautical en gineer understands technical side de sign also appreciates practical side youll read Another important ingredient story Franks decision right Outset use modern composite construction materials vacuumbagged wings Im sure point read ers thinking 1 just sport fly change balsa spruce indeed valid point view dont expect get wing bagging think youll still find interesting understand what can done newer construction techniques Being able build truer stronger wings much shorter time may precipitate some reconsideration Now over Frank Weston TerminatorWhat Frank Weston Terminator result ideas Ive developing head about year wanted use latest technology materials build Sailplane significantly exceeds performance current designs Performance means high L/D excellent control landings descents high durability low minimum flying speed During course development Ter minator have tried lot ideas Some worked some did ones worked kept others gave Jack Cash good friend competitor Some main ideas include 1 Big better pointBig means better Reynolds numbers better visibility distance stable handling down side Too big means poor launches mass cause damage landing 2 High aspect ratio T-tail better Just big point has its ups downs no pun intended up side high aspect ra tio T-tail efficient giving high L/D down side both lead fragile design harder build stiff enough can give interesting results high speeds 3 Use good airfoilThe Princeton tests Selig Donovan Fraser Soartech #8 have provided body data enables designer pick right airfoil reasonably sure results 4 down sides ideas 1 2ie high weight fragility lack rigiditylead logi cally Take advantage new construc tion materials methods ideas 5 Design prettyFortunately Sailplanes form follows function its hard de sign ugly although some have managed Evolution design above design goals mind began defining external constraints example Sailplane 500 ft long would fly better three feet long am externally constrained size car workbench length like six feet Major external design constraints turned out Length cars cargo area83 Length basement workshop16 ft Weight standard ESL winch can handleabout seven pounds Maximum length foam panel can cut accurately40 Time money could afford spend much less did Given external constraints design gan evolve wingspan settled 160 Fully assembled would fit basement Disas sembled would fit car wing would cut three panels 40 long two 20 Scaling existing designs wingspan 160 would give weight about six pounds weight six pounds loaded about 10 11 oz/sq ft gives wing area about 1218 sq 160-in span Schuemann planform gives aspect ratio about 211 root chord 10 wso vr 46 Model Aviation Radio Cono Soaring Byron Blakeslee 3134 N Winnebago Dr Sedalia CO 80135 Frank Westors new big 1 60-In wingspan Terminator receives some close attention Byrons column Frank shown about launch us ing high-start claims get 500-if releases little breeze blowing altitude has verified onboard Casio altitude watch Photo bottom right has Franks wife Lyn Terminator son Sam Franks Two-Meter design SAM-I details future column wing loading 10 11 ox/sq ft bigger faster plane wing load ing needs fly well Inductive reasoning will applied lieu technical explanation Good hand-launchers fly 4 oz/sq ft TwoMeters 6 Unlimiteds 9 F-16 160 lb/sq ft same wing loading manhole cover am told follows larger average Unlimited would fly well 10 Schuemann planform like looks Given weight aspect ratio wing area time pick airfoil Using variety performance programs David Frasers Sail plane Design data diskettes began sort through airfoils Among hot candidates emerged E-214 turbulators 5D7032 FX6O-100 turbulators RG15 SD7037 settled FX6O-100 number rea sons totally rational FX6O100 turbulators far away best performer German wind tunnel test data No test done Princeton turbulators would allow really good comparison SD foils Im sure trust united Ger trust Deutsche technically say FX6O-100 good believe also liked looks FX6O-l0O Its rationalbut what Its design hasnt FX6O-I00 used models its full-scale foil answer although capable blazing performance has plenty undercamber very thin trailing edge both difficult build conventional methods Ok now have wing airfoil remains designed fuselage con trol surfaces need stabilize wing point right direction cranked through few calculations yields fuselage length 62 wide enough hold two servos side side As concession American know-how used SD8020 foils em pennage fin rudder area came out about 69 sq horizontal stab ele vator 100 next step design process de velop structure capable supporting Continued page 178 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flow ventilation Extremely light weight added comfort Blocks harmful ultraviolet radiation Attractive case included _________~Wraparound frame fits comfortably over prescription glasses -.. Quartz mist coated scratch resistance Made entirely Polycarbonate impact protection ANSI Z871 specifications Available Clear shop work $1325 Amber overcast days & late afternoons S14~ Gray S14~ & Mirror $19~ sunny days CA Mask S15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Secretary Treasurer Pikes Peak PC Club Prices include shipping handling See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLYi -800-842-7233 Cont US Mississippi 6011924-9640 /MC oner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1 000/o failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $39g5Introductory offer $2~5 APPLIED EMGItIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division ol Research corporution Prices sunject tu change notice August 1990 47 Streamlined no-snag turnaround pulley designed built Michigan interna tional Soaring Society good ideas incorporated described Byron U I Icts make job ilium eilunuuie. u sional results I Order Send $100 coupon name addreual toADDRESS NJ_________________ _____ k 340854 Snyder Ave L SoeyHehts 079OITYSTATEZIP RC hobby based experience 11 VDC per cell 44 VDC under load four-cell battery little energy left battery never safe start flight Besides never discharge pack below 44 VDC never have worry about cell-reversal failures voltage still up flat part curve ends about 48 VDC av erage four-cell 550-mAh battery under kind load energy remaining battery about plunge over end volt age curve usually enough 10minute flight trouble battery little differ ent average battery really better perform battery tests ground keep track time air know fully charged packs good two hours would wise stop flying after 1 hours Either change batteries use bigger batter ies use field charger like CaRa Automatic Cycler-Charger See June 90 column Polks Multi Charge-A-Matic May 90 column use backup like FailSafe Flight System December 89 column plenty op tions dont have get last possible bit energy out batteries TY FUEL T U B NG Ill RCSoaringlBlakeslee page 47 drawn battery increases though remaining charge doesnt change DVMs cheap readily obtainable people will keep trying use Lets start fundamentals situa tion yields two hours service fully charged 550-mAh pack 15-minute pe nod consumes about 70 mAh havent tested situation know what service get full charge havent timing use batteries can guess charge remaining converting DVM ESM expanded scale meter Buy pair 10-ohm 10-watt wirewound resis tors local Radio Shack Put sideby-side twisting leads end together Obtain charging plug leads fit sys tem solder twisted pair resistor leads wire charging plug Connect DVM wires 11 putting DVM parallel resistorsEd adapter converts DVM no-load volt meter equivalent loaded expandedscale voltmeter ESM Actually scale doesnt change just make use greater resolution DVM relative analog meter plug assembly planes charging jack will see voltage leave plugged full 30 seconds will see voltage falls lower value should fall slowly 05 VDC unless start above 5 VDC Assuming testing four-cell Ni-Cd battery value after 30 seconds 480 volts probably have enough charge left fly another 10-minute flight five-cell bat tery want see 600 volts Re member DVM isnt absolutely correct assuming dont know what real characteristics situation Weve got conservative current drawn test about amp similar what moving two servos same time produces resistors may get warm because test will consume about 10 mAh energy rate five watts ANSI standard end-of-charge voltage Ni-Cd cell 09 VDC measured under load practice will usually translate 1 1 VDC load isnt point end point 11 VDC standard aerodynamic glory thin airfoil hig aspect ratio wing some special construction meth ods materials required wing keep such high aspect ratio wins twisting flapping full-span spar used spar starting bottom consists three tapered layers 7-mu carbon fiber 3A spruce high-density-foam shear web 7-mil layer carbon fiber another strip 3/ spruce whole spar rakes back slight angle %-in stainless wing rod accommodated entirely within spar butt end both spars wrapped three layers 1 7-oz Key lar cloth wing core itself cut extruded 15lb-density foam core cut full size section vacuum bagged between two Mylar carrier sheets glass/epoxy sandwich two layers 2-oz glass laid 450 bias top bottom did experiments various weights combinations Keviar glass before settlin8 layup turns Out two layers 2-oz glass cloth just stiff just light layer 1 7-oz Kevlar can seems weight layup oia amer iS perfectly proportioned modeling Curtiss Robin 049 Engines -Channel RIC 41 Wingapan Electric Power Optional SILI Oh 003 Very few full scale airoraff ideelly nuifed 10 model flighf us s fhe appealing old Curfiss Robin wan burn fhe spruca und linen age beaufifully poporfioned rubber electric glow enginea Easy fun build trainer-like performance Flyfine Models Calalog 50phonn 17031 273-0593 INE MODELS INC PO Box 2136 Fairfax VirginIa 22031 USA 178 Model Aviation Especially formulated use gasoline diesel fuels Wont swell harden use new transparent green fuel line perfect fuel connections fuel pumps smoke systems Sold foot Medium Large local Hobby Shop gb-fuels sure use Du-Bros Neoprene Silicone fuel Tubing.the Modelers Choice DU-BRO PRODUCTS INC 480 BONNER RD WAI iCflNflA II Radio Technique/Myers Continued page 176 HAS MOVED INTO LARGER QUARTERS 21 658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 rre proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES 4/9 PRESIDENT TATONE PRODUCTS CORP THE SCHNEIDER SPORT PORT MODEL R/C FLOATPLANE RECOMMENDED ENGINES 45/60 2STROKE 60/80 4STROKE QTF FLOATS INCLUDED LENGTH 34 IN CAP 6/10 LBS SPAN 57 INAREA 600 SQ INLENGTH 47 INEIGHT 65 / 70 LB L STREAM INCORPORATED RINNEWS Vi 23606DEALER INQUIRIES INVITED y fabric since actual weave 1 7-oz Kevlar much coarser 2oz glass takes much resin fill Glass has advantage being easily cut sandable much cheaper readily available Kevlar vacuum-bagged glass-skinned wing turns out much less time-consuming build conventional balsa-skinned wing no requirement sort splice sand wing skins no special subspars trailing edge ma terials required Covering necessary dont care about color neither painting pigment can added epoxy layup give lesired color wings have glossy glasssmooth finish pulled Mylar skins Undercamber thin trailing edges abso lutely no problem dont want dont have add leading edge strip Installing flaps ailerons simple proce dure Using razor stralghtedge control surfaces cut out wing Because trailing edges thin have very little ri gidity torsion glass skins get necessary stiffness aluminum arrow-shaft tubing laid leading edges flaps aile rons resulting structure very very stiff installed control surfaces using arrowshaft hinges Terminator #1 tape Termi nator #2 Both methods work think tape better because causes no stress concentration points trailing edge because flaps ailerons can removed repair repainting fuselage great pleasures devel oping Terminator design has discover ing testing new ideas techniques successful new ideas method building extremely light strong fuselages About year ago read article about Free Flighters building fuselages wrapping balsa around broomstick idea stuck something would like try months later absent-mindedly fiddling some Mylar sheet rolled tube light went tapered broomstick use balsa glass Kevlar After some experimentation came up technique rolling Mylar tube desired di mensions getting relatively smooth seamless layup glass and/or Kevlar around tube Once resin sets Mylar can re moved very light very strong tail boom re mains total weight Terminator tail boom wing root rudder less 15 oz fully capable supporting load T-tail high speed landings An additional unplanned benefit Mylarboom construction method fuselage/wing/ empennage alignment problems completely eliminated Slide tail boom forward section fuselage Line up eyeball until its right glue find can get much bet ter alignment eyeball ever can combination jigs fixtures Install wings using little dab glue affix vertical fin again aligning eyeball Its easy get true fuselage perfectly perpendicular vertical fin forward section fuselage laid up set female molds conventional fashion am contemplating trying forward fuselage laid up around male plug method would pro duce strong fuselage have advantage disadvantage allowing use airfoil/angle attack since wing root would molded would built up microballoons after wings installed Empennage tail surfaces constructed en tirely extruded foam glass vacuumbagged Weightwise come out about twothirds weight conventional balsa/foam No spars needed Terminators #1 #2 use horizontal stab elevator structural ri gidity anything else am process testing stabilator version should few grams lighter may strong may cause control problems Well sec Controls know know am big fan cheap simple radios Simple usually means reliable reliable better contest flying simple also better fewer switches throw less potential confu sion So what did use Terminator Youre AIRCRAFT ACCESSORIES FP R/C GOODIES AIR-FLO HINGES 1 ELITES PAN LPIRON-ON CLOTh 0 FORSTRIP HINGES 3 SMALLERWIDTHS FIT AIRCRAFFTO SMALL MEDIUM 350 WING SPANAND LARGE O LITEWEIGHTAIRCRAFT3 IRONON COY-Hinges eliminate gaps improve control ERING NOWefficiency Easy-to-installtoughflexible AVAILABLE IN1 SIZE 1-1/4 SIZE 1-1/2 SIZE USA$185 $195 $205I Uses Balsaloc INAunesive -HINGES 36 LONG S & H $100 TO 6I small sponge Allow50 dry -to ron Shrink iron heas gunGLOW HEAD ADAPTERSB frame FUEL PROOF PAINTABLE Workscox compound curves easy apply very tough Weight 1 oz/sqyd AVAILABLE NOWM FROM CHARLIES R/C GOODIESdES COLORS Red Yellow White Orange Blue Black Silver Antique Ivory DarkSAVE $ Green LITESPAN $300 Sheet 20 x 36Improve Engine SPEC $250 110 Gram Balsaloc adhesive applies 7-10 sheets $400 SPEC $325I SHIPPING & HANDLING Litespan up 7049/051 $250 09 $310 15 $325 U sheets plus 1 Balsaloc $275S & H $100 TO 5 UNITS Cash Prices BOLD Type Charge Cards 6% Under $100 5%I TAX$100 USA $300 Foreign VISA Above Minimum Charge $2500 No CODs CALIF Add SALES St Suite 281 SimiCa 93065FAX 8055279114 CE805 581-5061 L .Lral August 1990 179 AIR WOLF EPOXY FIBERGLASS FUSELAGE S TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 rightthe Airtronics Vision system Terminator can flown four-channel system yielded temptation can report date am happy Vision system Aileron servos mounted wings direct pushrod connection very small aileron control horns Elevator rudder two flap servos mounted cockpit flap driven its own servo via pushrod loads flaps great servo will job full flaps required high speed elevator rudder controlled pullpull cables 30-lb test plastic-coated braided starniess fishing wire no control horns belicranks Rudder cables wrap directly around rudder post elevator cables tach either side elevator hinge point El evator rudder control linkage internal has proven very positive slop-free Cables save weight simplify installation Both rudder elevator can disconnected screwdriver am now big fan cables Late note Terminator #2 just went nose-down 1000 ft no elevator control Casio altitude watch installed know high terminal velocity dive something behold until remembered lower flaps dive became vertical much slowerbut still no elevator control lot time think about al titude checked transmitter Everything should have tried elevator trim still no response dive ended impact recently plowed farmers field about quarter-mile away Terminator planted normal earths sur face up wing roots mud disap pointed hurried crash scene consoling myself still #1 arrived dis covered much amazement dam age limited bent wing rod cosmetic dam age wings root loosened empennage parts Structural repairs accomplished 30 minutes Cosmetic repairs will wait until next paint job cause crash failure eleva tor cable turns sharply tail boom am less cable fan now am switching 60# test Flying Terminator Terminator begin ners airplane Although stable ship its sta bility neutral positive point nose down accelerates hurry pull nose up climbs quickly trading speed altitude very nice unless pilot 05 seconds behind airplane case very easy develop severe case pilot-induc ed oscillation Roll response excellent rudder un coupled ailerons aileron rolls quite possible coupled rudder thermaling turns very graceful again pilot must care ful elevator Terminator indicates presence lift very dramatically much other planes have flown recently Maybe its larger size seems lifted wings changes nose attitude much noticeable As would expected Terminator seems penetrate cruise very well bearing out predictions performance software calcu lated L/D max well over 30 experience puts just about right Terminator can hang light wave-lift seemingly forever floating department Terminator does OK much excitement report much expected very light lift steep turns recommended efficiency drops quickly does Terminator Launching Terminator under normal condi tions presents little challenge high gusty winds larger wingspan can hand ful just prior launch Fortunately fuselage has good gripping area just under wing root Landing challenge Terminator has much wider speed range designs re sult can coming pilot lot faster lot slower pilot thinks extra-wide wingspan makes hard get out way have underestimated speed flaps however very effective little practice have managed land consistently out personal injury Approach turn-stalls problem thin tip section some people worried low-speed handling turns quite predictable Tenninator kit cost analysis has indi cated will able sell full Terminator kit $2745856 break-even cost dont think Im trying get rich ex pense Soaring buddies seriously Terminator expert con struction project because complication because techniques required because cost per crash enough people inter ested will make full set construction plans special materials foam cores molded fuse lage/canopy/tail boom available cost time materialssomewhere between $100 $200 depending people get volved Someone knows what doing can take Because techniques used actual construc THE TAILGEAR TAIL5t MOOST-SmUT ASSDENOT 1011010 od - m6e 00 00. dOi0d 0100 510 00000 holeoh 0000 Ml 000 oon40PIJOO Ii00JOT0t100 0116 Woooo Leo hardood100000 III 07231 00310roAd 100 0003 pr0g SM hOin3 DO 6o3 105 120in3 600000 00000 TO 60000*1W 600 00170 000000120161 o1000 iSOMOO 0010 0000 flORO00 0100201 662100100 000-0000000 160Th A0000TAELO 00600000-0110103101 lAST 00STA00ATI0 1101 00 100161100 031 00 E00ST 006001 000TS IO0TALLITICO 06000000 000001 001 1001600 180 Model Aviation SUCKER-KIT55995 VHS Show & Tell 5 00 $400 shipping & handling Ml residents 4% sales tax Sand 3190 SASE tar product list samples real wood veneer skins Product List lijcludes Gaptess Arrow Shalt Hinges Carbon Tow Mylar Sheet 0and High-Tech items 10 ler Inquires Welcome 0 C SEND CHECK OR MONEY ORDER TO O Box 866 Lapeer Ml 48446 313 664-3330 imposite Aircraft Eng & SupplyFAX 664-9780 El check enclosed Name LI Charge credit card Charge LI Mastercard Card # Exp datA City State Zip Include postage handling US $150 Canadian foreign add 15% minimum $300 Make payment US funda Wisconain residenta add 5%aalea tax 0110 tion time Terminator about two-thirds re quired typical Unlimited aileron ship Starting fuselage wing cores Termina tor #2 took less 20 labor hours finish test flying 132 LHs exact cause build quick can hear wails disbelief now Terminator requires almost no sanding no com plicated control linkage no fuselage build no covering much less detail work typical balsa construction Admittedly painting can take enormous amounts time depending pretty make painting required Vacuum bagging required can take 12 24 hours per part builder does have present after process has started Vac uum bagging construction technique serious builder should get familiar anyway will write note two next newsletter experiences bagging Terminator parts Call 1-301/757-5199 want get Terminator list Conclusion As matter interest Terminator product computer age drafting done using CADD computer-assisted design draftingBB much tradeoff analysis done using David Frasers Sailplane De sign program foils built ac tual design polars loaded directly CADD program plotted directly templates Kevlar computers CADD carbon fiber epoxy composite structure wind tunnel testing Mylar vacuum bagging extruded foam Terminator has buzzwords miss ing let know Much credit ideas went Termi nator goes Soaring friends CASA ESL Watching listening pet ories always entertaining frequently informa tive occasionally inspirational Thanks guys thanks go Frank Weston having inspiration write down first place giving permission share Model Aviation second place streamlined turnaround guess us think turnaround necessary evil winch launching Since its 200 yards away its out mind Right So someone sends photos turnaround thats better mouse trap thats news Thanks go Ron Peters sending photo following description Enclosed photo turnaround pulley constructed members Michigan International Soaring Society MISS lieve have eliminated problems sociated standard stake-type turnK around First have eliminated protru sions including hub U-bolt ends have shaped almost impossible line get hung up base staked ground turnaround slid onto Never hitting turnaround hammer greatly de creases chance nuts loosening due shock vibration big plus turnaround always looks new shell base constructed A-in sheet steel pieces can cut handsaw welded together easily stake made 18-in length 125-in angle iron plate welded top angle slipped through base plate holding ground have tested system season fantastic results Since have fine tuned keep waiting first hang-upnone yet designer turnaround club mem ber Fred Stafford Wayne MI Fred has come up helpful gadgets past felt worth sharing sure has cut down long walks other end field photo taken Greg Koslosky Canton MI New products department month re ceived samples couple new products worthy consideration first item trim-sheet material made Eagle Products PO Box 4609 Covina CA 91723 tel 1-818/339-1311 material fairly thick measured 007 adhesive extremely strong should stick thing Fourteen one- two- three-color combi nation sheets available Three 26 x 6-in sheets come package stuff great cutting out sort special graphics can think An application stumbled Onto make cover over servos mounted wings works great should available hobby stores second item called Model Saver pus out Aero-Electric PO Box 283 Goleta CA 93116 tel 1-805/687-4206 comes 4 x 12-in sheet flat poly bag youd swear has nothing stuff transparent tough 013 thick has extremely tenacious adhe sive conforms very well compound curves can apply anywhere model want protect wear tearlike noses wing tips fact its such unique product folks will probably dreaming up uses years now sells $195 per sheet di rect including postage hobby shops Continued page 182 August 1990 181 KaImDach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send __________ copies RADIO CONTROL BUYERS GUIDE Price per copy S12B5I#12086 LI Visa Cross-Country clarification February column said Great Race put Chicagos SOAR club granddaddy CrossCountry races said because believed guess oldest X-C race still ing conducted having started 1976 Bicen tennial tribute Jerry Krainock Dave Peltz wrote point out Great Race first X C race Jerry San Fernando Valley Silent Flyers clubmates organized first X-C race fall 1975 SFVSF ran contest until about 1987 Jerry goes back much farther X C having set FM-recognized distance records 1972 1974 Dave said Jerry co authors FAT F3H X-C rules hope sets record straight Max Splat/Gall Continued page 35 ground OK engine generally un loads 10-20% air ground rpm may well below pipes resonant frequency though system works Well air want highest possible power output such FAI racing competition theres factor consider engine has rpm rangethe power band peak rpm produces power Manufactur ers often include information instruc tion sheet comes engine Ha threw away didnt case trick have Maxi mum Splat occur have occur engines power band air Recall Maximum Splat depends two factors pipe length engine rpm know engines peak rpm can make ourselves bench prop will spin about speed simulate con ditions air allows us control other factor pipe length gradually cutting pipe header shorter until rings happily target rpm always balance propeller always wear eye protection As zero target rpm bench prop may spin little too fast due assistance pipe Also inevitable result cutting pipe match specific rpm last cut will actually go little too far Its like helpful lady bus says Oh know stop Just watch get off stop before So its best start bench prop little large say 2000 rpm below target rpm have target rpm itself little low say 1000 rpm below engines actual peak time go over target rpm make slightly larger bench prop Shorten pipe time until rpm no longer increases witl cut done whittle new prop i turns 80-90% engines peak rpm ac count 15% unloading alr Fly tht plane using trial error outlined above t find exactly right ground rpm Muffled tuned pipes may cure ills solve elegant fashion twin problems insufficient muffling power needed insufficient power muffling needed modelers used readily available devices perhaps could quil bickering about noise get real bus iness sport hobby enjoy May Splat Giants/de Vries Continued page 41 Japanese Zero Platt kit en tered Precision William Carper Jackson OH Precision Scale model turned everybodys head Frank Mizers Westland Lysander its fully detailed scale interiorincluding such niceties trim wheels complete crew safety harnesses epitomized art Precision Scale functional metal leading etlge slats scale paint job scale Hercules engine frosting cake Giant Scale birds also evident nonscale judging categories black-and-gold Ray Ban special Weeks biplane entered Sport Biplane Big birds invaded OldTimer category well Boehie Giant looked must have taken weeks pro duction Top Flites transparent Mono Kote cover huge wide-angle camera lens couldnt capture stalwart wasnt content just dis play model Upon returning under ground parking garage next hotel Friday afternoon heard unmistakable sound RC engine parked car walked toward engines hum Sure enough flying RC Heli copter goodan opinion confirmed three municipal employ ees formed audience As 1989 RC helium balloonsI counted nine various timesflittered above crowd arena Pickup bal loon races arranged radio prob lems hanging power cables frustrated would-be Phineas Foggs 1990 Giant year Toledo show Given continuing creasing interest large-sized Scale mod els isnt surprising SAFE FLYING IS NO ACCIDENT 182 Model Aviation WILHAMS ACCESSORIES 4 PILOT STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGt 4 ENGINES PRATT & WHITNEY HT HONE PARTS T & WHITNEY HONE WRIGHT E GUNSj LEWIS VICKERS DAU SELLUM SEND $3 FOR FULLY ILLUSTRATED CATALOG$LUAI~1S DEPT MAPAWNEE ST SAN MARCOS CALIFORNIA 92069 I