RICHLAND UPDATE 1989 AMA NATS will held Richland WA July 15-24 plan having Thermal site F3B site Slope site could just boost Slope Soaring needs know will official Slope competition am sure Wil Byers rest Tn-City Soarers will best show off what Slope Soaring has offer Plan attending showing rest modeling community commitment lief best segment RC modeling Also plans next Scale Slope Soaring Fun-Fly well under way Last years probably Soaring event year years looks better fun-fly may extended four days include hobby expo information upeoming hap penings Richland contact Wil Byers 632 Meadows Drive E Richland WA 99352 Sailplanes International first column cluded couple photos Solent Sailplanes catalog received letters ques tions about get copy catalog Un fortunately US supplier no longer bus iness posed definite problem locating catalog help Dan Danrich finally able find original supplier catalog England interested address Sailplanes International Unit 6 Cwmtillery Industrial Estate Abertillery Gwent NP3 lLZ organization offers Sailplanes ranging simple built-up trainer some truly gorgeous all-glass Scale ships Penetrator couple years ago saw photo beautiful little Slope ship de signed after P-Si Mustang time didnt have other information about plane things got kind busy pretty much pushed back thoughts searching Out its origin last spring saw another photo plane built Harley Mi chaels through him able find out everything needed know Penetrator kitted John Fotiu JM Glascraft features lightweight epoxy glass fu selage foam wing cores sold either basic deluxe kit basic kit includes glass fuselage foam cores basic hardware package full-size plans deluxe kit includes above plus necessary wood complete model complete hardware package ba sic kit will run $54 deluxe kit $7650 fuselage wing cores excel lent quality kit really difficult build some experience working glass foam would definitely help As flying Penetrator thrill half provides outstanding high-speed perform ance extremely aerobatic just 50In span weighing less 20 oz Penetrator doesnt strike observer likely well suited high winds fact though ship really its element wind blowing 30 t name Penetrator nothing looking unbridled performance wrapped up beautiful little airplane Penetrator John has recently introduced D version Penetrator scalelike appearance D version comes clear bubble canopy looks great done up military finish information write John JM Glascraft 30820 Mayflower Roseville MI 48066 Super Cheetah Cheetah radiocontrolled Sailplane intended Aerobatics Combat plane also makes great aileron trainer sport flier Its maneuverable rugged inexpensive wing section best compromise speed handling lowlift conditions Its maneuverable virtue its aileron elevator control its 64-in span makes ideally suited average flier plane rugged because cross-linked polyeth ylene fuselage almost impossible destroy unique covering wing stab fin very resilient Cheetah has special quality allow ing radical experimental flyingif goof little lost makes great plane wishes extend flying skills will extend range flying sites very small sites very small landing areas can now used Cheetah above carefree airplane sorts Slope Soaring fun above standard pitch put out Larry Robert Pettyjohn Cheetah Models Unlike other ads pitches though bit about Cheetah really representative Sailplane Cheetah say Cheetahs greatest asset worry-free flying brings Because its inLeft Although Kirby Nelsons first attempt Slope design looks like real winner Vertigo spans 62 uses E387 airfoil weighs 38 oz Photo Kirby Nelson Right wings pivot control roll 60-in-span Aerrow makes great lightweight Slope ship Mark Hees designer friend Steve Moss built two Aerrows tear up skies central Texas Photo Mark Hees 52 Model Aviation Radio Conoi Slope Soaring Mark Tnebes 20794 Kftlsler Ct Saratoga CA 95070 JM Glascrafts Penetrator Despite its small size Penetrator provides high speed perform ance incredible aerobatics fiberglass exceptional Photo Harley Michaclis Looking ultimate Combat fun ship its indestructible fuselage easily re placeable parts Super Cheetah just ticket Text has details address destructible fuselage easily replaced expensive parts youll willing push Cheetah its limits beyond Just knowing rugged easily can repaired really adds flying enjoyment Most Sailplanes build scratchbuilt Some have much 200 hours work except competition situation am usually reluctant push hard would really like Cheetah allows go out really throw airplane around Isnt what pure Slope Soaring about Cheetah comes two versions stock Cheetah spans 48 will cost about $43 Super Cheetah spans 64 tapered wing runs about $49 Both Sailpianes use same fuselage tail feathers difference being wing fuselage comes six different colors red blue yellow white orange black Building Cheetah very simple shouldnt pose problems novice builder information Cheetah can contact Larry Robert Cheetah Models 14725 Bessemer St #B Van Nuys CA 91411 Slope Racing airfoil design interesting piece appeared November issue La Sierra Slope News newsletter La Sierra Slope Soaring Club Written Mike Reed contains some very helpful interest ing information choosing airfoil Slope RacerContinued page 158 #ALL PARTS PRECUT & PREPAINTED *jJflJJ & FLY IN TWO HOURS R AIRPLANES 1521 MORNINGSIDE DRIVE BURBANK CA 91506 USA [ CATALOG $750 Contains lOOus paper airplanes jostage stamp size 6 foot wing span Gliders rubber powered Die-cut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Caatog CORSAIR pape aLtplane above $1050 pL $250 pohage aiy SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling Ml residents add 45h sales tax Send 3100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO March 1989 53 An old Spirit 75 flies off silver dump back Aspen Mountain Ac cording its pilot Craig Angus eleva tion site about 12000 ftwhich translates fast flying Plc Karen Angus $475 AVAILABLE AT AMERICAS 0/S TRIBUTED BY FINEST HOBBY SHOPS SMITh LED ff8 135587550 San Geb,eI Soad cadero cA 53422 450-1717 14 Wingspan Paper Flying Scale Model Airplane $7 00 popular sites Southern uai ifornia Point Fermin offers Slope flier big lift Bill Sprague gets little body English help friend Sprague photo SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time Composite Aircraft Eng & SupplyPO Box 866 Lapeer Ml 48446 313 664-3330 VINYLWRITE CUSTOM LETUTERING Providing elegant time saving economical finishing touch modelers U TO APPLY ering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligningindividualletters decals text custom computer cut 3M Premium PEEL INGcast vinyl only2 mu thin ical horizontal text om lengths olors 6 typestyles inc MiIita Block ted upright text high Priced right no minimum charge example can have AM4 number 2 high PEEL OFf ThE CARAIER TAPEtext color $330 P & H STEP BACK CE . Call write complete info AflordmpmceusedapoerecnAMA YOURE DONEpack & sample IT S FREE Fly NYLWEITE Custom Lettering model today VINYLWEITE CUSTOM LEFIERING ______________ 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 Noon 6PM Pacific order CA ru add taL RC Giant Scale/de Vries Continued page 51 program will draw em up 36 chord program prices range $3495 $8995 An SASE will bring info $3 will provide computer screen printout program choice Only caveat Glenns programs compat ible Hercules Graphic cards finally got see Eldon Linds Magic Magnet Builder flesh Its jig system wings fuselages based flat 48-in sheet grid ded steel certainly will add precision Gi ant model construction Eldon has redesigned fuselage jig holders has developed magnetequipped clamp appears versatile youre tired pin-dented fingers drop Eldon line 3151 Caravelle Dr Lake Havasu City AZ 86403 telephone 602/453-7970 Although noted Bob Banka Scale Model Re search 2334 Ticonderoga Way Costa Mesa CA 92626 714/979-8058 above amazed yours truly news now stocks 2200 dif ferent photo paks plus host new three-views 88/89 catalog due out about time read Three bucks will get copy Although weve noted before pages some best documentation threeviews ever drawn late great Paul Matt put pen Mylar could well assured hed researched subject thor oughly could back up efforts completely Paul studio behind house held ver itable treasure trove documentation data held photographic darkroom museumquality model collection walls lined jampacked file cabinets two-car garage filled books published Strange say drawing board bedroom event passed some question fate original fullsized drawings appeared reduced-size form Historical Aviation Albums model airplane magazines heart ened learned Sunshine House Inc acquired Pauls drawings now available again Sunshines Aviation Heritage Library catalog lists sale along books aviation enthusi ast address 806 Lockport Road PO Box 2065 Terre Haute IN 47802 phone 812 2323076 also have order number 800 9990141 Keep Big Birds flying RC Slope Soaring/Triebes Continued page 53 As Slope Racers demand models other form Soaring Slope Gliders have clean retain aerodynamic efficiency other words lift-to-drag ratio LID should high possible Structurally Slopers have withstand high G maneuvers occasional glance other aircraft well landing unforgiving rock-infested terrain difficult design Sailplane fast straight level flight Slope Racers must exe cute 1800 turns end course Slope Racing Sailplanes few design factors important airfoil selection 15%-thick high-camber airfoil used Sailplane will have too much lift several ounces pounds ballast will needed trim Sail plane airfoil will great performing turn long straight section course will too slow real competition other hand modelers modify Sailplanes using too thin airfoil section often drop out competition just opposite reasons instance model using 6%-thick airfoil less camber will surely pass 15% model straight level flight wing loadings identical tight turn 6% model will have use angle attack 15% model keep turn tight true causes drag airflow separation moves ward toward center lift Often case highly loaded model thin lowcamber airfoil goes turn mushes-out tip stalls no doubt end race Sailplane Slope Glider goes bank turn wing must generate lift counteract ertia bank 600 requires wing produce twice effective lift 2 Gs 850 model will experience 9 Gs angle attack model too thin airfoil will very high thus producing large amounts drag However thicker airfoil camber will require less angle attack perform same turn re sulting less drag less speed reduction information should kept mind select ing airfoil Slope Racer Another factor concerning airfoil selection type lift available slope site Sail plane designed fly well slope can dog another happy medium must main tamed model going used different slopes plane flown slope model can optimized parDARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust BUST PILOT KIT Contains pilot head helmet sport cap goggles lackel Easy assemble finish Price 00flO scale NEW 595 895 795 nv-,4 suww #103-A scale 1495 JET PILOT KIT Pilot has molded let helmet Contains face mask oxygen hose Extreme ly Realistic Weighs lass oz Price #SOO-1/s scale ... 595 #307-A scale695 ORDERING INSTHuIIuN See dealer first order direct Add $100 shipping NYS residents add 7% tax Sand check money order CODS OK Send $100 catalog FULL BODY PILOT KIT Contains pilot head hands boots helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionabte tool Price #206-R scale095 #205-1/i scale995 #2041/4 scale1095 #2031/3 scale1695 * Some aImplO sewing requIred See Dealer add Dollar direct order handlIng 158 Model Aviation RADIO CONTROL SHORT KITS FOR THE SPORT MODELER A1F BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AHD TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 845/459-0417 MORE SINGLE ENGINE FIGHTERS fOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P-51D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WULF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONET ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD $750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $350 FOR PRODUCTS CATALOG ticUlar lift Condition speed wind/lift produced slope good place start far wing thick ness concerned 10% two-meter span favorite Semisymmetrical airfoils range especially laminar flow ones can loaded up 13 oz/sq ft still turn re spectable radius Variable sweep wings Envision low-speed stability great turning ability wings extended straight out high-speed stability credible straight-line speeds wings swept back too difficult design Sailplane great low-end top-end turning character istics design character istics another matter Could variable sweep answer Undoubtedly control mechanism system would extremely complex would have sweep wings both forward backward shift ballast forward backward accompany change CG wings moved have strength take heavy loads Slope Racer encounters Could such system de signed Would compact light enough work Sailplane havent caught yet above chal lenge engineering types out have looking something could revo lutionize RC Sailpianes chance Pivoting wing Aerrow may have taken few years Sailplane fliers get away traditional control systems try some thing new advent unique effective systems such wingerons fi nally catching Mark Hees Leander TX sent some info photo Aerrow id like take opportunity tell about little ship call Aerrow 60-in plane pivoting wings roll control features built-up construction no dihedral thinned 95% E374 airfoil Flying weight about 18 oz may fast some full-blown Slope ships still flies well winds up about 25 mph no ballast central Texas hills generally small covered trees landing areas tight Also winds usually gusty planes have able penetrate during gusts also have ability float out lulls between Aerrow being aerodynami cally clean light wing loading seems just ticket conditions Carbon fiber joints such advanced materi als carbon fiber Keviar being incorporated Sailpianes more some questions beginning appear example what kind adhesive best use materials official research group South Bay Soaring Society precisely Reinhard Lahde Bob Bayard have put tremendous amount time researching modern materials following report some findings ap peared SBSS newsletter Silent Flyer process continuing some work us RB started strength wing spars felt need find best way glue strips carbon fiber/epoxy laminates other other materials such spruce note reports findings glue strengths al iphatic glue gap-filling cyanoacrylate three types epoxy fast 5-minute medium-speed 30-minute slow slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joints resist sliding breaking along glued surface As typical test sample strip carbon fiber laminate glued its upper lower surface spruce have tested CF/spruce also CF/balsa CF/CF joints Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inated surface partially unsanded CyA somewhat tolerant some shiny surface spots laminate Best course sand laminated surfaces until no shiny spots re main results report based no shiny spots laminate preparation though rea son know about shiny spot problem too thorough sanding earlier phases inquiry 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywhere ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flown Original training handbook ning success rate Lovely vacation arealfield prices foodlaccomodations ACT NOW CLASSES FILLING FAST Info pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 64166 7151524-2985 March 1989 159 IS vvsv,~ o IONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT S HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN . 6495 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 h proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT EPROOUCTSCORP AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 NEW BY POPULAR REQUEST LARGE SCALE ENGINE CYLINDERS PRATT WHITNEY WASP 4 WRIGHT J-5 WHIRLWIND Molded high-impact styrene dummy cylinders feature deep cooling fins utmost realism Both Wasp Whirlwind types cylinders available two different large scales 1/5th 2 4th 3 ts include assembly instructions Smaller sizes also offered Note units may modified resemble other cylinder types Send $3 full-color catalog featuring aircraft paintings suitable framing WILLIAMS BROTHERS INC DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 best joints made least glue clamping two pieces squeezing out ex cess glue made joints thicker glue glue pulled apart chunks rather shearing along whole surface strength very low no about one-fourth strength well-made joint good joint between CF balsa fails pulling slivers balsa off piece glue torn Bonds between two materials weakest Glue joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminating interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break sam ples Aliphatic glue makes weakest bond tested Next 5-minute epoxy fast epoxy somewhat weaker slower epox les cyanoacrylate strongest quite bit being about twice strong slowest ep oxy four times strong fast epoxy average breaking shear stresses sam ples CF/CF CF/spruce given below Glue Average Strength psi Aliphatie 1220 Epoxyfast 5-mm 1530 Epoxymedium 30-mm 2190 Epoxyslow 3-hr 3410 Cyanoacrylate 6560 summary want good joint tween CF/epoxy laminate spruce other laminate sand until shiny spots disappear clean put Slow Zap squeeze extra glue out Thats best joint Well thats about month Coming near future will column dedicated purely flying wings canards have know exciting wings canards would like see included feel free send some information photos RC Electrics/Kopski Continued page 55 leads return past topic Economy Electric say past because back August 86 issue addressed great length topic get Electric economi cally really realizing have seriously revisited subject inany depth since So guess what Readers have both inquiring about reminding fact some have hinted Ive abandoned subject area least intentionally Ill now try make up lost time time referenced economical Astro motor can style worked very well used motor several years did local Electric-flyin friends writing column Astro dropping economy motors its line setting up concentrate much higher quality product ar ray now place So what recommended August 86 issue immediately obsoleted has brought letters over years still does specifically lots readers still have either burning interest pressing need thing ECONOMICALLY Putting straightforward fashion Some modelers have limited resources simply able go best merchandise kinds considerations reason wrote col umn first place Does mean should deprived Electric enjoyment DEFI NITELY NOT Having just offered some info Great Planes PT its Thrustmaster motor let fer motor excellent example eco nomical way power economy Etectric Thrustmaster available separately around $25 retail think motor can buy confidence use different 05-size planes No its cobalt No brushes replaceable Yes its relatively heavy its power handling capability BUT will fly fly fly heck out model finally wears out whatever should very much have gotten moneys worth Out effect motor throwawaybut what After potentially several hundred Yes really mean several hundred flights really cares Ive flown economy can motors hundreds flights experience did include Thrustmaster time feel Id expect about same results Used properly correct battery prop motor should give LOTS LOTS continuing funeconomically what plane Well obvious choice PT thats Put motor nose Two-Meter Glider 8 x 4 direct-drive prop youve got simple effec tive power systemand thats cheap may competitive higher performance cobalts want fly Electric fun budget way go course complete economy system in160 Model Aviation
Edition: Model Aviation - 1989/03
Page Numbers: 52, 53, 158, 159, 160
RICHLAND UPDATE 1989 AMA NATS will held Richland WA July 15-24 plan having Thermal site F3B site Slope site could just boost Slope Soaring needs know will official Slope competition am sure Wil Byers rest Tn-City Soarers will best show off what Slope Soaring has offer Plan attending showing rest modeling community commitment lief best segment RC modeling Also plans next Scale Slope Soaring Fun-Fly well under way Last years probably Soaring event year years looks better fun-fly may extended four days include hobby expo information upeoming hap penings Richland contact Wil Byers 632 Meadows Drive E Richland WA 99352 Sailplanes International first column cluded couple photos Solent Sailplanes catalog received letters ques tions about get copy catalog Un fortunately US supplier no longer bus iness posed definite problem locating catalog help Dan Danrich finally able find original supplier catalog England interested address Sailplanes International Unit 6 Cwmtillery Industrial Estate Abertillery Gwent NP3 lLZ organization offers Sailplanes ranging simple built-up trainer some truly gorgeous all-glass Scale ships Penetrator couple years ago saw photo beautiful little Slope ship de signed after P-Si Mustang time didnt have other information about plane things got kind busy pretty much pushed back thoughts searching Out its origin last spring saw another photo plane built Harley Mi chaels through him able find out everything needed know Penetrator kitted John Fotiu JM Glascraft features lightweight epoxy glass fu selage foam wing cores sold either basic deluxe kit basic kit includes glass fuselage foam cores basic hardware package full-size plans deluxe kit includes above plus necessary wood complete model complete hardware package ba sic kit will run $54 deluxe kit $7650 fuselage wing cores excel lent quality kit really difficult build some experience working glass foam would definitely help As flying Penetrator thrill half provides outstanding high-speed perform ance extremely aerobatic just 50In span weighing less 20 oz Penetrator doesnt strike observer likely well suited high winds fact though ship really its element wind blowing 30 t name Penetrator nothing looking unbridled performance wrapped up beautiful little airplane Penetrator John has recently introduced D version Penetrator scalelike appearance D version comes clear bubble canopy looks great done up military finish information write John JM Glascraft 30820 Mayflower Roseville MI 48066 Super Cheetah Cheetah radiocontrolled Sailplane intended Aerobatics Combat plane also makes great aileron trainer sport flier Its maneuverable rugged inexpensive wing section best compromise speed handling lowlift conditions Its maneuverable virtue its aileron elevator control its 64-in span makes ideally suited average flier plane rugged because cross-linked polyeth ylene fuselage almost impossible destroy unique covering wing stab fin very resilient Cheetah has special quality allow ing radical experimental flyingif goof little lost makes great plane wishes extend flying skills will extend range flying sites very small sites very small landing areas can now used Cheetah above carefree airplane sorts Slope Soaring fun above standard pitch put out Larry Robert Pettyjohn Cheetah Models Unlike other ads pitches though bit about Cheetah really representative Sailplane Cheetah say Cheetahs greatest asset worry-free flying brings Because its inLeft Although Kirby Nelsons first attempt Slope design looks like real winner Vertigo spans 62 uses E387 airfoil weighs 38 oz Photo Kirby Nelson Right wings pivot control roll 60-in-span Aerrow makes great lightweight Slope ship Mark Hees designer friend Steve Moss built two Aerrows tear up skies central Texas Photo Mark Hees 52 Model Aviation Radio Conoi Slope Soaring Mark Tnebes 20794 Kftlsler Ct Saratoga CA 95070 JM Glascrafts Penetrator Despite its small size Penetrator provides high speed perform ance incredible aerobatics fiberglass exceptional Photo Harley Michaclis Looking ultimate Combat fun ship its indestructible fuselage easily re placeable parts Super Cheetah just ticket Text has details address destructible fuselage easily replaced expensive parts youll willing push Cheetah its limits beyond Just knowing rugged easily can repaired really adds flying enjoyment Most Sailplanes build scratchbuilt Some have much 200 hours work except competition situation am usually reluctant push hard would really like Cheetah allows go out really throw airplane around Isnt what pure Slope Soaring about Cheetah comes two versions stock Cheetah spans 48 will cost about $43 Super Cheetah spans 64 tapered wing runs about $49 Both Sailpianes use same fuselage tail feathers difference being wing fuselage comes six different colors red blue yellow white orange black Building Cheetah very simple shouldnt pose problems novice builder information Cheetah can contact Larry Robert Cheetah Models 14725 Bessemer St #B Van Nuys CA 91411 Slope Racing airfoil design interesting piece appeared November issue La Sierra Slope News newsletter La Sierra Slope Soaring Club Written Mike Reed contains some very helpful interest ing information choosing airfoil Slope RacerContinued page 158 #ALL PARTS PRECUT & PREPAINTED *jJflJJ & FLY IN TWO HOURS R AIRPLANES 1521 MORNINGSIDE DRIVE BURBANK CA 91506 USA [ CATALOG $750 Contains lOOus paper airplanes jostage stamp size 6 foot wing span Gliders rubber powered Die-cut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Caatog CORSAIR pape aLtplane above $1050 pL $250 pohage aiy SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling Ml residents add 45h sales tax Send 3100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO March 1989 53 An old Spirit 75 flies off silver dump back Aspen Mountain Ac cording its pilot Craig Angus eleva tion site about 12000 ftwhich translates fast flying Plc Karen Angus $475 AVAILABLE AT AMERICAS 0/S TRIBUTED BY FINEST HOBBY SHOPS SMITh LED ff8 135587550 San Geb,eI Soad cadero cA 53422 450-1717 14 Wingspan Paper Flying Scale Model Airplane $7 00 popular sites Southern uai ifornia Point Fermin offers Slope flier big lift Bill Sprague gets little body English help friend Sprague photo SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time Composite Aircraft Eng & SupplyPO Box 866 Lapeer Ml 48446 313 664-3330 VINYLWRITE CUSTOM LETUTERING Providing elegant time saving economical finishing touch modelers U TO APPLY ering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligningindividualletters decals text custom computer cut 3M Premium PEEL INGcast vinyl only2 mu thin ical horizontal text om lengths olors 6 typestyles inc MiIita Block ted upright text high Priced right no minimum charge example can have AM4 number 2 high PEEL OFf ThE CARAIER TAPEtext color $330 P & H STEP BACK CE . Call write complete info AflordmpmceusedapoerecnAMA YOURE DONEpack & sample IT S FREE Fly NYLWEITE Custom Lettering model today VINYLWEITE CUSTOM LEFIERING ______________ 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 Noon 6PM Pacific order CA ru add taL RC Giant Scale/de Vries Continued page 51 program will draw em up 36 chord program prices range $3495 $8995 An SASE will bring info $3 will provide computer screen printout program choice Only caveat Glenns programs compat ible Hercules Graphic cards finally got see Eldon Linds Magic Magnet Builder flesh Its jig system wings fuselages based flat 48-in sheet grid ded steel certainly will add precision Gi ant model construction Eldon has redesigned fuselage jig holders has developed magnetequipped clamp appears versatile youre tired pin-dented fingers drop Eldon line 3151 Caravelle Dr Lake Havasu City AZ 86403 telephone 602/453-7970 Although noted Bob Banka Scale Model Re search 2334 Ticonderoga Way Costa Mesa CA 92626 714/979-8058 above amazed yours truly news now stocks 2200 dif ferent photo paks plus host new three-views 88/89 catalog due out about time read Three bucks will get copy Although weve noted before pages some best documentation threeviews ever drawn late great Paul Matt put pen Mylar could well assured hed researched subject thor oughly could back up efforts completely Paul studio behind house held ver itable treasure trove documentation data held photographic darkroom museumquality model collection walls lined jampacked file cabinets two-car garage filled books published Strange say drawing board bedroom event passed some question fate original fullsized drawings appeared reduced-size form Historical Aviation Albums model airplane magazines heart ened learned Sunshine House Inc acquired Pauls drawings now available again Sunshines Aviation Heritage Library catalog lists sale along books aviation enthusi ast address 806 Lockport Road PO Box 2065 Terre Haute IN 47802 phone 812 2323076 also have order number 800 9990141 Keep Big Birds flying RC Slope Soaring/Triebes Continued page 53 As Slope Racers demand models other form Soaring Slope Gliders have clean retain aerodynamic efficiency other words lift-to-drag ratio LID should high possible Structurally Slopers have withstand high G maneuvers occasional glance other aircraft well landing unforgiving rock-infested terrain difficult design Sailplane fast straight level flight Slope Racers must exe cute 1800 turns end course Slope Racing Sailplanes few design factors important airfoil selection 15%-thick high-camber airfoil used Sailplane will have too much lift several ounces pounds ballast will needed trim Sail plane airfoil will great performing turn long straight section course will too slow real competition other hand modelers modify Sailplanes using too thin airfoil section often drop out competition just opposite reasons instance model using 6%-thick airfoil less camber will surely pass 15% model straight level flight wing loadings identical tight turn 6% model will have use angle attack 15% model keep turn tight true causes drag airflow separation moves ward toward center lift Often case highly loaded model thin lowcamber airfoil goes turn mushes-out tip stalls no doubt end race Sailplane Slope Glider goes bank turn wing must generate lift counteract ertia bank 600 requires wing produce twice effective lift 2 Gs 850 model will experience 9 Gs angle attack model too thin airfoil will very high thus producing large amounts drag However thicker airfoil camber will require less angle attack perform same turn re sulting less drag less speed reduction information should kept mind select ing airfoil Slope Racer Another factor concerning airfoil selection type lift available slope site Sail plane designed fly well slope can dog another happy medium must main tamed model going used different slopes plane flown slope model can optimized parDARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust BUST PILOT KIT Contains pilot head helmet sport cap goggles lackel Easy assemble finish Price 00flO scale NEW 595 895 795 nv-,4 suww #103-A scale 1495 JET PILOT KIT Pilot has molded let helmet Contains face mask oxygen hose Extreme ly Realistic Weighs lass oz Price #SOO-1/s scale ... 595 #307-A scale695 ORDERING INSTHuIIuN See dealer first order direct Add $100 shipping NYS residents add 7% tax Sand check money order CODS OK Send $100 catalog FULL BODY PILOT KIT Contains pilot head hands boots helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionabte tool Price #206-R scale095 #205-1/i scale995 #2041/4 scale1095 #2031/3 scale1695 * Some aImplO sewing requIred See Dealer add Dollar direct order handlIng 158 Model Aviation RADIO CONTROL SHORT KITS FOR THE SPORT MODELER A1F BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AHD TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 845/459-0417 MORE SINGLE ENGINE FIGHTERS fOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P-51D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WULF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONET ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD $750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $350 FOR PRODUCTS CATALOG ticUlar lift Condition speed wind/lift produced slope good place start far wing thick ness concerned 10% two-meter span favorite Semisymmetrical airfoils range especially laminar flow ones can loaded up 13 oz/sq ft still turn re spectable radius Variable sweep wings Envision low-speed stability great turning ability wings extended straight out high-speed stability credible straight-line speeds wings swept back too difficult design Sailplane great low-end top-end turning character istics design character istics another matter Could variable sweep answer Undoubtedly control mechanism system would extremely complex would have sweep wings both forward backward shift ballast forward backward accompany change CG wings moved have strength take heavy loads Slope Racer encounters Could such system de signed Would compact light enough work Sailplane havent caught yet above chal lenge engineering types out have looking something could revo lutionize RC Sailpianes chance Pivoting wing Aerrow may have taken few years Sailplane fliers get away traditional control systems try some thing new advent unique effective systems such wingerons fi nally catching Mark Hees Leander TX sent some info photo Aerrow id like take opportunity tell about little ship call Aerrow 60-in plane pivoting wings roll control features built-up construction no dihedral thinned 95% E374 airfoil Flying weight about 18 oz may fast some full-blown Slope ships still flies well winds up about 25 mph no ballast central Texas hills generally small covered trees landing areas tight Also winds usually gusty planes have able penetrate during gusts also have ability float out lulls between Aerrow being aerodynami cally clean light wing loading seems just ticket conditions Carbon fiber joints such advanced materi als carbon fiber Keviar being incorporated Sailpianes more some questions beginning appear example what kind adhesive best use materials official research group South Bay Soaring Society precisely Reinhard Lahde Bob Bayard have put tremendous amount time researching modern materials following report some findings ap peared SBSS newsletter Silent Flyer process continuing some work us RB started strength wing spars felt need find best way glue strips carbon fiber/epoxy laminates other other materials such spruce note reports findings glue strengths al iphatic glue gap-filling cyanoacrylate three types epoxy fast 5-minute medium-speed 30-minute slow slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joints resist sliding breaking along glued surface As typical test sample strip carbon fiber laminate glued its upper lower surface spruce have tested CF/spruce also CF/balsa CF/CF joints Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inated surface partially unsanded CyA somewhat tolerant some shiny surface spots laminate Best course sand laminated surfaces until no shiny spots re main results report based no shiny spots laminate preparation though rea son know about shiny spot problem too thorough sanding earlier phases inquiry 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywhere ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flown Original training handbook ning success rate Lovely vacation arealfield prices foodlaccomodations ACT NOW CLASSES FILLING FAST Info pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 64166 7151524-2985 March 1989 159 IS vvsv,~ o IONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT S HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN . 6495 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 h proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT EPROOUCTSCORP AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 NEW BY POPULAR REQUEST LARGE SCALE ENGINE CYLINDERS PRATT WHITNEY WASP 4 WRIGHT J-5 WHIRLWIND Molded high-impact styrene dummy cylinders feature deep cooling fins utmost realism Both Wasp Whirlwind types cylinders available two different large scales 1/5th 2 4th 3 ts include assembly instructions Smaller sizes also offered Note units may modified resemble other cylinder types Send $3 full-color catalog featuring aircraft paintings suitable framing WILLIAMS BROTHERS INC DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 best joints made least glue clamping two pieces squeezing out ex cess glue made joints thicker glue glue pulled apart chunks rather shearing along whole surface strength very low no about one-fourth strength well-made joint good joint between CF balsa fails pulling slivers balsa off piece glue torn Bonds between two materials weakest Glue joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminating interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break sam ples Aliphatic glue makes weakest bond tested Next 5-minute epoxy fast epoxy somewhat weaker slower epox les cyanoacrylate strongest quite bit being about twice strong slowest ep oxy four times strong fast epoxy average breaking shear stresses sam ples CF/CF CF/spruce given below Glue Average Strength psi Aliphatie 1220 Epoxyfast 5-mm 1530 Epoxymedium 30-mm 2190 Epoxyslow 3-hr 3410 Cyanoacrylate 6560 summary want good joint tween CF/epoxy laminate spruce other laminate sand until shiny spots disappear clean put Slow Zap squeeze extra glue out Thats best joint Well thats about month Coming near future will column dedicated purely flying wings canards have know exciting wings canards would like see included feel free send some information photos RC Electrics/Kopski Continued page 55 leads return past topic Economy Electric say past because back August 86 issue addressed great length topic get Electric economi cally really realizing have seriously revisited subject inany depth since So guess what Readers have both inquiring about reminding fact some have hinted Ive abandoned subject area least intentionally Ill now try make up lost time time referenced economical Astro motor can style worked very well used motor several years did local Electric-flyin friends writing column Astro dropping economy motors its line setting up concentrate much higher quality product ar ray now place So what recommended August 86 issue immediately obsoleted has brought letters over years still does specifically lots readers still have either burning interest pressing need thing ECONOMICALLY Putting straightforward fashion Some modelers have limited resources simply able go best merchandise kinds considerations reason wrote col umn first place Does mean should deprived Electric enjoyment DEFI NITELY NOT Having just offered some info Great Planes PT its Thrustmaster motor let fer motor excellent example eco nomical way power economy Etectric Thrustmaster available separately around $25 retail think motor can buy confidence use different 05-size planes No its cobalt No brushes replaceable Yes its relatively heavy its power handling capability BUT will fly fly fly heck out model finally wears out whatever should very much have gotten moneys worth Out effect motor throwawaybut what After potentially several hundred Yes really mean several hundred flights really cares Ive flown economy can motors hundreds flights experience did include Thrustmaster time feel Id expect about same results Used properly correct battery prop motor should give LOTS LOTS continuing funeconomically what plane Well obvious choice PT thats Put motor nose Two-Meter Glider 8 x 4 direct-drive prop youve got simple effec tive power systemand thats cheap may competitive higher performance cobalts want fly Electric fun budget way go course complete economy system in160 Model Aviation
Edition: Model Aviation - 1989/03
Page Numbers: 52, 53, 158, 159, 160
RICHLAND UPDATE 1989 AMA NATS will held Richland WA July 15-24 plan having Thermal site F3B site Slope site could just boost Slope Soaring needs know will official Slope competition am sure Wil Byers rest Tn-City Soarers will best show off what Slope Soaring has offer Plan attending showing rest modeling community commitment lief best segment RC modeling Also plans next Scale Slope Soaring Fun-Fly well under way Last years probably Soaring event year years looks better fun-fly may extended four days include hobby expo information upeoming hap penings Richland contact Wil Byers 632 Meadows Drive E Richland WA 99352 Sailplanes International first column cluded couple photos Solent Sailplanes catalog received letters ques tions about get copy catalog Un fortunately US supplier no longer bus iness posed definite problem locating catalog help Dan Danrich finally able find original supplier catalog England interested address Sailplanes International Unit 6 Cwmtillery Industrial Estate Abertillery Gwent NP3 lLZ organization offers Sailplanes ranging simple built-up trainer some truly gorgeous all-glass Scale ships Penetrator couple years ago saw photo beautiful little Slope ship de signed after P-Si Mustang time didnt have other information about plane things got kind busy pretty much pushed back thoughts searching Out its origin last spring saw another photo plane built Harley Mi chaels through him able find out everything needed know Penetrator kitted John Fotiu JM Glascraft features lightweight epoxy glass fu selage foam wing cores sold either basic deluxe kit basic kit includes glass fuselage foam cores basic hardware package full-size plans deluxe kit includes above plus necessary wood complete model complete hardware package ba sic kit will run $54 deluxe kit $7650 fuselage wing cores excel lent quality kit really difficult build some experience working glass foam would definitely help As flying Penetrator thrill half provides outstanding high-speed perform ance extremely aerobatic just 50In span weighing less 20 oz Penetrator doesnt strike observer likely well suited high winds fact though ship really its element wind blowing 30 t name Penetrator nothing looking unbridled performance wrapped up beautiful little airplane Penetrator John has recently introduced D version Penetrator scalelike appearance D version comes clear bubble canopy looks great done up military finish information write John JM Glascraft 30820 Mayflower Roseville MI 48066 Super Cheetah Cheetah radiocontrolled Sailplane intended Aerobatics Combat plane also makes great aileron trainer sport flier Its maneuverable rugged inexpensive wing section best compromise speed handling lowlift conditions Its maneuverable virtue its aileron elevator control its 64-in span makes ideally suited average flier plane rugged because cross-linked polyeth ylene fuselage almost impossible destroy unique covering wing stab fin very resilient Cheetah has special quality allow ing radical experimental flyingif goof little lost makes great plane wishes extend flying skills will extend range flying sites very small sites very small landing areas can now used Cheetah above carefree airplane sorts Slope Soaring fun above standard pitch put out Larry Robert Pettyjohn Cheetah Models Unlike other ads pitches though bit about Cheetah really representative Sailplane Cheetah say Cheetahs greatest asset worry-free flying brings Because its inLeft Although Kirby Nelsons first attempt Slope design looks like real winner Vertigo spans 62 uses E387 airfoil weighs 38 oz Photo Kirby Nelson Right wings pivot control roll 60-in-span Aerrow makes great lightweight Slope ship Mark Hees designer friend Steve Moss built two Aerrows tear up skies central Texas Photo Mark Hees 52 Model Aviation Radio Conoi Slope Soaring Mark Tnebes 20794 Kftlsler Ct Saratoga CA 95070 JM Glascrafts Penetrator Despite its small size Penetrator provides high speed perform ance incredible aerobatics fiberglass exceptional Photo Harley Michaclis Looking ultimate Combat fun ship its indestructible fuselage easily re placeable parts Super Cheetah just ticket Text has details address destructible fuselage easily replaced expensive parts youll willing push Cheetah its limits beyond Just knowing rugged easily can repaired really adds flying enjoyment Most Sailplanes build scratchbuilt Some have much 200 hours work except competition situation am usually reluctant push hard would really like Cheetah allows go out really throw airplane around Isnt what pure Slope Soaring about Cheetah comes two versions stock Cheetah spans 48 will cost about $43 Super Cheetah spans 64 tapered wing runs about $49 Both Sailpianes use same fuselage tail feathers difference being wing fuselage comes six different colors red blue yellow white orange black Building Cheetah very simple shouldnt pose problems novice builder information Cheetah can contact Larry Robert Cheetah Models 14725 Bessemer St #B Van Nuys CA 91411 Slope Racing airfoil design interesting piece appeared November issue La Sierra Slope News newsletter La Sierra Slope Soaring Club Written Mike Reed contains some very helpful interest ing information choosing airfoil Slope RacerContinued page 158 #ALL PARTS PRECUT & PREPAINTED *jJflJJ & FLY IN TWO HOURS R AIRPLANES 1521 MORNINGSIDE DRIVE BURBANK CA 91506 USA [ CATALOG $750 Contains lOOus paper airplanes jostage stamp size 6 foot wing span Gliders rubber powered Die-cut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Caatog CORSAIR pape aLtplane above $1050 pL $250 pohage aiy SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling Ml residents add 45h sales tax Send 3100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO March 1989 53 An old Spirit 75 flies off silver dump back Aspen Mountain Ac cording its pilot Craig Angus eleva tion site about 12000 ftwhich translates fast flying Plc Karen Angus $475 AVAILABLE AT AMERICAS 0/S TRIBUTED BY FINEST HOBBY SHOPS SMITh LED ff8 135587550 San Geb,eI Soad cadero cA 53422 450-1717 14 Wingspan Paper Flying Scale Model Airplane $7 00 popular sites Southern uai ifornia Point Fermin offers Slope flier big lift Bill Sprague gets little body English help friend Sprague photo SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time Composite Aircraft Eng & SupplyPO Box 866 Lapeer Ml 48446 313 664-3330 VINYLWRITE CUSTOM LETUTERING Providing elegant time saving economical finishing touch modelers U TO APPLY ering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligningindividualletters decals text custom computer cut 3M Premium PEEL INGcast vinyl only2 mu thin ical horizontal text om lengths olors 6 typestyles inc MiIita Block ted upright text high Priced right no minimum charge example can have AM4 number 2 high PEEL OFf ThE CARAIER TAPEtext color $330 P & H STEP BACK CE . Call write complete info AflordmpmceusedapoerecnAMA YOURE DONEpack & sample IT S FREE Fly NYLWEITE Custom Lettering model today VINYLWEITE CUSTOM LEFIERING ______________ 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 Noon 6PM Pacific order CA ru add taL RC Giant Scale/de Vries Continued page 51 program will draw em up 36 chord program prices range $3495 $8995 An SASE will bring info $3 will provide computer screen printout program choice Only caveat Glenns programs compat ible Hercules Graphic cards finally got see Eldon Linds Magic Magnet Builder flesh Its jig system wings fuselages based flat 48-in sheet grid ded steel certainly will add precision Gi ant model construction Eldon has redesigned fuselage jig holders has developed magnetequipped clamp appears versatile youre tired pin-dented fingers drop Eldon line 3151 Caravelle Dr Lake Havasu City AZ 86403 telephone 602/453-7970 Although noted Bob Banka Scale Model Re search 2334 Ticonderoga Way Costa Mesa CA 92626 714/979-8058 above amazed yours truly news now stocks 2200 dif ferent photo paks plus host new three-views 88/89 catalog due out about time read Three bucks will get copy Although weve noted before pages some best documentation threeviews ever drawn late great Paul Matt put pen Mylar could well assured hed researched subject thor oughly could back up efforts completely Paul studio behind house held ver itable treasure trove documentation data held photographic darkroom museumquality model collection walls lined jampacked file cabinets two-car garage filled books published Strange say drawing board bedroom event passed some question fate original fullsized drawings appeared reduced-size form Historical Aviation Albums model airplane magazines heart ened learned Sunshine House Inc acquired Pauls drawings now available again Sunshines Aviation Heritage Library catalog lists sale along books aviation enthusi ast address 806 Lockport Road PO Box 2065 Terre Haute IN 47802 phone 812 2323076 also have order number 800 9990141 Keep Big Birds flying RC Slope Soaring/Triebes Continued page 53 As Slope Racers demand models other form Soaring Slope Gliders have clean retain aerodynamic efficiency other words lift-to-drag ratio LID should high possible Structurally Slopers have withstand high G maneuvers occasional glance other aircraft well landing unforgiving rock-infested terrain difficult design Sailplane fast straight level flight Slope Racers must exe cute 1800 turns end course Slope Racing Sailplanes few design factors important airfoil selection 15%-thick high-camber airfoil used Sailplane will have too much lift several ounces pounds ballast will needed trim Sail plane airfoil will great performing turn long straight section course will too slow real competition other hand modelers modify Sailplanes using too thin airfoil section often drop out competition just opposite reasons instance model using 6%-thick airfoil less camber will surely pass 15% model straight level flight wing loadings identical tight turn 6% model will have use angle attack 15% model keep turn tight true causes drag airflow separation moves ward toward center lift Often case highly loaded model thin lowcamber airfoil goes turn mushes-out tip stalls no doubt end race Sailplane Slope Glider goes bank turn wing must generate lift counteract ertia bank 600 requires wing produce twice effective lift 2 Gs 850 model will experience 9 Gs angle attack model too thin airfoil will very high thus producing large amounts drag However thicker airfoil camber will require less angle attack perform same turn re sulting less drag less speed reduction information should kept mind select ing airfoil Slope Racer Another factor concerning airfoil selection type lift available slope site Sail plane designed fly well slope can dog another happy medium must main tamed model going used different slopes plane flown slope model can optimized parDARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust BUST PILOT KIT Contains pilot head helmet sport cap goggles lackel Easy assemble finish Price 00flO scale NEW 595 895 795 nv-,4 suww #103-A scale 1495 JET PILOT KIT Pilot has molded let helmet Contains face mask oxygen hose Extreme ly Realistic Weighs lass oz Price #SOO-1/s scale ... 595 #307-A scale695 ORDERING INSTHuIIuN See dealer first order direct Add $100 shipping NYS residents add 7% tax Sand check money order CODS OK Send $100 catalog FULL BODY PILOT KIT Contains pilot head hands boots helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionabte tool Price #206-R scale095 #205-1/i scale995 #2041/4 scale1095 #2031/3 scale1695 * Some aImplO sewing requIred See Dealer add Dollar direct order handlIng 158 Model Aviation RADIO CONTROL SHORT KITS FOR THE SPORT MODELER A1F BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AHD TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 845/459-0417 MORE SINGLE ENGINE FIGHTERS fOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P-51D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WULF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONET ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD $750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $350 FOR PRODUCTS CATALOG ticUlar lift Condition speed wind/lift produced slope good place start far wing thick ness concerned 10% two-meter span favorite Semisymmetrical airfoils range especially laminar flow ones can loaded up 13 oz/sq ft still turn re spectable radius Variable sweep wings Envision low-speed stability great turning ability wings extended straight out high-speed stability credible straight-line speeds wings swept back too difficult design Sailplane great low-end top-end turning character istics design character istics another matter Could variable sweep answer Undoubtedly control mechanism system would extremely complex would have sweep wings both forward backward shift ballast forward backward accompany change CG wings moved have strength take heavy loads Slope Racer encounters Could such system de signed Would compact light enough work Sailplane havent caught yet above chal lenge engineering types out have looking something could revo lutionize RC Sailpianes chance Pivoting wing Aerrow may have taken few years Sailplane fliers get away traditional control systems try some thing new advent unique effective systems such wingerons fi nally catching Mark Hees Leander TX sent some info photo Aerrow id like take opportunity tell about little ship call Aerrow 60-in plane pivoting wings roll control features built-up construction no dihedral thinned 95% E374 airfoil Flying weight about 18 oz may fast some full-blown Slope ships still flies well winds up about 25 mph no ballast central Texas hills generally small covered trees landing areas tight Also winds usually gusty planes have able penetrate during gusts also have ability float out lulls between Aerrow being aerodynami cally clean light wing loading seems just ticket conditions Carbon fiber joints such advanced materi als carbon fiber Keviar being incorporated Sailpianes more some questions beginning appear example what kind adhesive best use materials official research group South Bay Soaring Society precisely Reinhard Lahde Bob Bayard have put tremendous amount time researching modern materials following report some findings ap peared SBSS newsletter Silent Flyer process continuing some work us RB started strength wing spars felt need find best way glue strips carbon fiber/epoxy laminates other other materials such spruce note reports findings glue strengths al iphatic glue gap-filling cyanoacrylate three types epoxy fast 5-minute medium-speed 30-minute slow slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joints resist sliding breaking along glued surface As typical test sample strip carbon fiber laminate glued its upper lower surface spruce have tested CF/spruce also CF/balsa CF/CF joints Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inated surface partially unsanded CyA somewhat tolerant some shiny surface spots laminate Best course sand laminated surfaces until no shiny spots re main results report based no shiny spots laminate preparation though rea son know about shiny spot problem too thorough sanding earlier phases inquiry 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywhere ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flown Original training handbook ning success rate Lovely vacation arealfield prices foodlaccomodations ACT NOW CLASSES FILLING FAST Info pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 64166 7151524-2985 March 1989 159 IS vvsv,~ o IONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT S HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN . 6495 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 h proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT EPROOUCTSCORP AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 NEW BY POPULAR REQUEST LARGE SCALE ENGINE CYLINDERS PRATT WHITNEY WASP 4 WRIGHT J-5 WHIRLWIND Molded high-impact styrene dummy cylinders feature deep cooling fins utmost realism Both Wasp Whirlwind types cylinders available two different large scales 1/5th 2 4th 3 ts include assembly instructions Smaller sizes also offered Note units may modified resemble other cylinder types Send $3 full-color catalog featuring aircraft paintings suitable framing WILLIAMS BROTHERS INC DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 best joints made least glue clamping two pieces squeezing out ex cess glue made joints thicker glue glue pulled apart chunks rather shearing along whole surface strength very low no about one-fourth strength well-made joint good joint between CF balsa fails pulling slivers balsa off piece glue torn Bonds between two materials weakest Glue joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminating interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break sam ples Aliphatic glue makes weakest bond tested Next 5-minute epoxy fast epoxy somewhat weaker slower epox les cyanoacrylate strongest quite bit being about twice strong slowest ep oxy four times strong fast epoxy average breaking shear stresses sam ples CF/CF CF/spruce given below Glue Average Strength psi Aliphatie 1220 Epoxyfast 5-mm 1530 Epoxymedium 30-mm 2190 Epoxyslow 3-hr 3410 Cyanoacrylate 6560 summary want good joint tween CF/epoxy laminate spruce other laminate sand until shiny spots disappear clean put Slow Zap squeeze extra glue out Thats best joint Well thats about month Coming near future will column dedicated purely flying wings canards have know exciting wings canards would like see included feel free send some information photos RC Electrics/Kopski Continued page 55 leads return past topic Economy Electric say past because back August 86 issue addressed great length topic get Electric economi cally really realizing have seriously revisited subject inany depth since So guess what Readers have both inquiring about reminding fact some have hinted Ive abandoned subject area least intentionally Ill now try make up lost time time referenced economical Astro motor can style worked very well used motor several years did local Electric-flyin friends writing column Astro dropping economy motors its line setting up concentrate much higher quality product ar ray now place So what recommended August 86 issue immediately obsoleted has brought letters over years still does specifically lots readers still have either burning interest pressing need thing ECONOMICALLY Putting straightforward fashion Some modelers have limited resources simply able go best merchandise kinds considerations reason wrote col umn first place Does mean should deprived Electric enjoyment DEFI NITELY NOT Having just offered some info Great Planes PT its Thrustmaster motor let fer motor excellent example eco nomical way power economy Etectric Thrustmaster available separately around $25 retail think motor can buy confidence use different 05-size planes No its cobalt No brushes replaceable Yes its relatively heavy its power handling capability BUT will fly fly fly heck out model finally wears out whatever should very much have gotten moneys worth Out effect motor throwawaybut what After potentially several hundred Yes really mean several hundred flights really cares Ive flown economy can motors hundreds flights experience did include Thrustmaster time feel Id expect about same results Used properly correct battery prop motor should give LOTS LOTS continuing funeconomically what plane Well obvious choice PT thats Put motor nose Two-Meter Glider 8 x 4 direct-drive prop youve got simple effec tive power systemand thats cheap may competitive higher performance cobalts want fly Electric fun budget way go course complete economy system in160 Model Aviation
Edition: Model Aviation - 1989/03
Page Numbers: 52, 53, 158, 159, 160
RICHLAND UPDATE 1989 AMA NATS will held Richland WA July 15-24 plan having Thermal site F3B site Slope site could just boost Slope Soaring needs know will official Slope competition am sure Wil Byers rest Tn-City Soarers will best show off what Slope Soaring has offer Plan attending showing rest modeling community commitment lief best segment RC modeling Also plans next Scale Slope Soaring Fun-Fly well under way Last years probably Soaring event year years looks better fun-fly may extended four days include hobby expo information upeoming hap penings Richland contact Wil Byers 632 Meadows Drive E Richland WA 99352 Sailplanes International first column cluded couple photos Solent Sailplanes catalog received letters ques tions about get copy catalog Un fortunately US supplier no longer bus iness posed definite problem locating catalog help Dan Danrich finally able find original supplier catalog England interested address Sailplanes International Unit 6 Cwmtillery Industrial Estate Abertillery Gwent NP3 lLZ organization offers Sailplanes ranging simple built-up trainer some truly gorgeous all-glass Scale ships Penetrator couple years ago saw photo beautiful little Slope ship de signed after P-Si Mustang time didnt have other information about plane things got kind busy pretty much pushed back thoughts searching Out its origin last spring saw another photo plane built Harley Mi chaels through him able find out everything needed know Penetrator kitted John Fotiu JM Glascraft features lightweight epoxy glass fu selage foam wing cores sold either basic deluxe kit basic kit includes glass fuselage foam cores basic hardware package full-size plans deluxe kit includes above plus necessary wood complete model complete hardware package ba sic kit will run $54 deluxe kit $7650 fuselage wing cores excel lent quality kit really difficult build some experience working glass foam would definitely help As flying Penetrator thrill half provides outstanding high-speed perform ance extremely aerobatic just 50In span weighing less 20 oz Penetrator doesnt strike observer likely well suited high winds fact though ship really its element wind blowing 30 t name Penetrator nothing looking unbridled performance wrapped up beautiful little airplane Penetrator John has recently introduced D version Penetrator scalelike appearance D version comes clear bubble canopy looks great done up military finish information write John JM Glascraft 30820 Mayflower Roseville MI 48066 Super Cheetah Cheetah radiocontrolled Sailplane intended Aerobatics Combat plane also makes great aileron trainer sport flier Its maneuverable rugged inexpensive wing section best compromise speed handling lowlift conditions Its maneuverable virtue its aileron elevator control its 64-in span makes ideally suited average flier plane rugged because cross-linked polyeth ylene fuselage almost impossible destroy unique covering wing stab fin very resilient Cheetah has special quality allow ing radical experimental flyingif goof little lost makes great plane wishes extend flying skills will extend range flying sites very small sites very small landing areas can now used Cheetah above carefree airplane sorts Slope Soaring fun above standard pitch put out Larry Robert Pettyjohn Cheetah Models Unlike other ads pitches though bit about Cheetah really representative Sailplane Cheetah say Cheetahs greatest asset worry-free flying brings Because its inLeft Although Kirby Nelsons first attempt Slope design looks like real winner Vertigo spans 62 uses E387 airfoil weighs 38 oz Photo Kirby Nelson Right wings pivot control roll 60-in-span Aerrow makes great lightweight Slope ship Mark Hees designer friend Steve Moss built two Aerrows tear up skies central Texas Photo Mark Hees 52 Model Aviation Radio Conoi Slope Soaring Mark Tnebes 20794 Kftlsler Ct Saratoga CA 95070 JM Glascrafts Penetrator Despite its small size Penetrator provides high speed perform ance incredible aerobatics fiberglass exceptional Photo Harley Michaclis Looking ultimate Combat fun ship its indestructible fuselage easily re placeable parts Super Cheetah just ticket Text has details address destructible fuselage easily replaced expensive parts youll willing push Cheetah its limits beyond Just knowing rugged easily can repaired really adds flying enjoyment Most Sailplanes build scratchbuilt Some have much 200 hours work except competition situation am usually reluctant push hard would really like Cheetah allows go out really throw airplane around Isnt what pure Slope Soaring about Cheetah comes two versions stock Cheetah spans 48 will cost about $43 Super Cheetah spans 64 tapered wing runs about $49 Both Sailpianes use same fuselage tail feathers difference being wing fuselage comes six different colors red blue yellow white orange black Building Cheetah very simple shouldnt pose problems novice builder information Cheetah can contact Larry Robert Cheetah Models 14725 Bessemer St #B Van Nuys CA 91411 Slope Racing airfoil design interesting piece appeared November issue La Sierra Slope News newsletter La Sierra Slope Soaring Club Written Mike Reed contains some very helpful interest ing information choosing airfoil Slope RacerContinued page 158 #ALL PARTS PRECUT & PREPAINTED *jJflJJ & FLY IN TWO HOURS R AIRPLANES 1521 MORNINGSIDE DRIVE BURBANK CA 91506 USA [ CATALOG $750 Contains lOOus paper airplanes jostage stamp size 6 foot wing span Gliders rubber powered Die-cut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Caatog CORSAIR pape aLtplane above $1050 pL $250 pohage aiy SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling Ml residents add 45h sales tax Send 3100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO March 1989 53 An old Spirit 75 flies off silver dump back Aspen Mountain Ac cording its pilot Craig Angus eleva tion site about 12000 ftwhich translates fast flying Plc Karen Angus $475 AVAILABLE AT AMERICAS 0/S TRIBUTED BY FINEST HOBBY SHOPS SMITh LED ff8 135587550 San Geb,eI Soad cadero cA 53422 450-1717 14 Wingspan Paper Flying Scale Model Airplane $7 00 popular sites Southern uai ifornia Point Fermin offers Slope flier big lift Bill Sprague gets little body English help friend Sprague photo SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time Composite Aircraft Eng & SupplyPO Box 866 Lapeer Ml 48446 313 664-3330 VINYLWRITE CUSTOM LETUTERING Providing elegant time saving economical finishing touch modelers U TO APPLY ering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligningindividualletters decals text custom computer cut 3M Premium PEEL INGcast vinyl only2 mu thin ical horizontal text om lengths olors 6 typestyles inc MiIita Block ted upright text high Priced right no minimum charge example can have AM4 number 2 high PEEL OFf ThE CARAIER TAPEtext color $330 P & H STEP BACK CE . Call write complete info AflordmpmceusedapoerecnAMA YOURE DONEpack & sample IT S FREE Fly NYLWEITE Custom Lettering model today VINYLWEITE CUSTOM LEFIERING ______________ 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 Noon 6PM Pacific order CA ru add taL RC Giant Scale/de Vries Continued page 51 program will draw em up 36 chord program prices range $3495 $8995 An SASE will bring info $3 will provide computer screen printout program choice Only caveat Glenns programs compat ible Hercules Graphic cards finally got see Eldon Linds Magic Magnet Builder flesh Its jig system wings fuselages based flat 48-in sheet grid ded steel certainly will add precision Gi ant model construction Eldon has redesigned fuselage jig holders has developed magnetequipped clamp appears versatile youre tired pin-dented fingers drop Eldon line 3151 Caravelle Dr Lake Havasu City AZ 86403 telephone 602/453-7970 Although noted Bob Banka Scale Model Re search 2334 Ticonderoga Way Costa Mesa CA 92626 714/979-8058 above amazed yours truly news now stocks 2200 dif ferent photo paks plus host new three-views 88/89 catalog due out about time read Three bucks will get copy Although weve noted before pages some best documentation threeviews ever drawn late great Paul Matt put pen Mylar could well assured hed researched subject thor oughly could back up efforts completely Paul studio behind house held ver itable treasure trove documentation data held photographic darkroom museumquality model collection walls lined jampacked file cabinets two-car garage filled books published Strange say drawing board bedroom event passed some question fate original fullsized drawings appeared reduced-size form Historical Aviation Albums model airplane magazines heart ened learned Sunshine House Inc acquired Pauls drawings now available again Sunshines Aviation Heritage Library catalog lists sale along books aviation enthusi ast address 806 Lockport Road PO Box 2065 Terre Haute IN 47802 phone 812 2323076 also have order number 800 9990141 Keep Big Birds flying RC Slope Soaring/Triebes Continued page 53 As Slope Racers demand models other form Soaring Slope Gliders have clean retain aerodynamic efficiency other words lift-to-drag ratio LID should high possible Structurally Slopers have withstand high G maneuvers occasional glance other aircraft well landing unforgiving rock-infested terrain difficult design Sailplane fast straight level flight Slope Racers must exe cute 1800 turns end course Slope Racing Sailplanes few design factors important airfoil selection 15%-thick high-camber airfoil used Sailplane will have too much lift several ounces pounds ballast will needed trim Sail plane airfoil will great performing turn long straight section course will too slow real competition other hand modelers modify Sailplanes using too thin airfoil section often drop out competition just opposite reasons instance model using 6%-thick airfoil less camber will surely pass 15% model straight level flight wing loadings identical tight turn 6% model will have use angle attack 15% model keep turn tight true causes drag airflow separation moves ward toward center lift Often case highly loaded model thin lowcamber airfoil goes turn mushes-out tip stalls no doubt end race Sailplane Slope Glider goes bank turn wing must generate lift counteract ertia bank 600 requires wing produce twice effective lift 2 Gs 850 model will experience 9 Gs angle attack model too thin airfoil will very high thus producing large amounts drag However thicker airfoil camber will require less angle attack perform same turn re sulting less drag less speed reduction information should kept mind select ing airfoil Slope Racer Another factor concerning airfoil selection type lift available slope site Sail plane designed fly well slope can dog another happy medium must main tamed model going used different slopes plane flown slope model can optimized parDARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust BUST PILOT KIT Contains pilot head helmet sport cap goggles lackel Easy assemble finish Price 00flO scale NEW 595 895 795 nv-,4 suww #103-A scale 1495 JET PILOT KIT Pilot has molded let helmet Contains face mask oxygen hose Extreme ly Realistic Weighs lass oz Price #SOO-1/s scale ... 595 #307-A scale695 ORDERING INSTHuIIuN See dealer first order direct Add $100 shipping NYS residents add 7% tax Sand check money order CODS OK Send $100 catalog FULL BODY PILOT KIT Contains pilot head hands boots helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionabte tool Price #206-R scale095 #205-1/i scale995 #2041/4 scale1095 #2031/3 scale1695 * Some aImplO sewing requIred See Dealer add Dollar direct order handlIng 158 Model Aviation RADIO CONTROL SHORT KITS FOR THE SPORT MODELER A1F BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AHD TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 845/459-0417 MORE SINGLE ENGINE FIGHTERS fOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P-51D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WULF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONET ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD $750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $350 FOR PRODUCTS CATALOG ticUlar lift Condition speed wind/lift produced slope good place start far wing thick ness concerned 10% two-meter span favorite Semisymmetrical airfoils range especially laminar flow ones can loaded up 13 oz/sq ft still turn re spectable radius Variable sweep wings Envision low-speed stability great turning ability wings extended straight out high-speed stability credible straight-line speeds wings swept back too difficult design Sailplane great low-end top-end turning character istics design character istics another matter Could variable sweep answer Undoubtedly control mechanism system would extremely complex would have sweep wings both forward backward shift ballast forward backward accompany change CG wings moved have strength take heavy loads Slope Racer encounters Could such system de signed Would compact light enough work Sailplane havent caught yet above chal lenge engineering types out have looking something could revo lutionize RC Sailpianes chance Pivoting wing Aerrow may have taken few years Sailplane fliers get away traditional control systems try some thing new advent unique effective systems such wingerons fi nally catching Mark Hees Leander TX sent some info photo Aerrow id like take opportunity tell about little ship call Aerrow 60-in plane pivoting wings roll control features built-up construction no dihedral thinned 95% E374 airfoil Flying weight about 18 oz may fast some full-blown Slope ships still flies well winds up about 25 mph no ballast central Texas hills generally small covered trees landing areas tight Also winds usually gusty planes have able penetrate during gusts also have ability float out lulls between Aerrow being aerodynami cally clean light wing loading seems just ticket conditions Carbon fiber joints such advanced materi als carbon fiber Keviar being incorporated Sailpianes more some questions beginning appear example what kind adhesive best use materials official research group South Bay Soaring Society precisely Reinhard Lahde Bob Bayard have put tremendous amount time researching modern materials following report some findings ap peared SBSS newsletter Silent Flyer process continuing some work us RB started strength wing spars felt need find best way glue strips carbon fiber/epoxy laminates other other materials such spruce note reports findings glue strengths al iphatic glue gap-filling cyanoacrylate three types epoxy fast 5-minute medium-speed 30-minute slow slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joints resist sliding breaking along glued surface As typical test sample strip carbon fiber laminate glued its upper lower surface spruce have tested CF/spruce also CF/balsa CF/CF joints Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inated surface partially unsanded CyA somewhat tolerant some shiny surface spots laminate Best course sand laminated surfaces until no shiny spots re main results report based no shiny spots laminate preparation though rea son know about shiny spot problem too thorough sanding earlier phases inquiry 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywhere ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flown Original training handbook ning success rate Lovely vacation arealfield prices foodlaccomodations ACT NOW CLASSES FILLING FAST Info pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 64166 7151524-2985 March 1989 159 IS vvsv,~ o IONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT S HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN . 6495 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 h proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT EPROOUCTSCORP AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 NEW BY POPULAR REQUEST LARGE SCALE ENGINE CYLINDERS PRATT WHITNEY WASP 4 WRIGHT J-5 WHIRLWIND Molded high-impact styrene dummy cylinders feature deep cooling fins utmost realism Both Wasp Whirlwind types cylinders available two different large scales 1/5th 2 4th 3 ts include assembly instructions Smaller sizes also offered Note units may modified resemble other cylinder types Send $3 full-color catalog featuring aircraft paintings suitable framing WILLIAMS BROTHERS INC DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 best joints made least glue clamping two pieces squeezing out ex cess glue made joints thicker glue glue pulled apart chunks rather shearing along whole surface strength very low no about one-fourth strength well-made joint good joint between CF balsa fails pulling slivers balsa off piece glue torn Bonds between two materials weakest Glue joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminating interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break sam ples Aliphatic glue makes weakest bond tested Next 5-minute epoxy fast epoxy somewhat weaker slower epox les cyanoacrylate strongest quite bit being about twice strong slowest ep oxy four times strong fast epoxy average breaking shear stresses sam ples CF/CF CF/spruce given below Glue Average Strength psi Aliphatie 1220 Epoxyfast 5-mm 1530 Epoxymedium 30-mm 2190 Epoxyslow 3-hr 3410 Cyanoacrylate 6560 summary want good joint tween CF/epoxy laminate spruce other laminate sand until shiny spots disappear clean put Slow Zap squeeze extra glue out Thats best joint Well thats about month Coming near future will column dedicated purely flying wings canards have know exciting wings canards would like see included feel free send some information photos RC Electrics/Kopski Continued page 55 leads return past topic Economy Electric say past because back August 86 issue addressed great length topic get Electric economi cally really realizing have seriously revisited subject inany depth since So guess what Readers have both inquiring about reminding fact some have hinted Ive abandoned subject area least intentionally Ill now try make up lost time time referenced economical Astro motor can style worked very well used motor several years did local Electric-flyin friends writing column Astro dropping economy motors its line setting up concentrate much higher quality product ar ray now place So what recommended August 86 issue immediately obsoleted has brought letters over years still does specifically lots readers still have either burning interest pressing need thing ECONOMICALLY Putting straightforward fashion Some modelers have limited resources simply able go best merchandise kinds considerations reason wrote col umn first place Does mean should deprived Electric enjoyment DEFI NITELY NOT Having just offered some info Great Planes PT its Thrustmaster motor let fer motor excellent example eco nomical way power economy Etectric Thrustmaster available separately around $25 retail think motor can buy confidence use different 05-size planes No its cobalt No brushes replaceable Yes its relatively heavy its power handling capability BUT will fly fly fly heck out model finally wears out whatever should very much have gotten moneys worth Out effect motor throwawaybut what After potentially several hundred Yes really mean several hundred flights really cares Ive flown economy can motors hundreds flights experience did include Thrustmaster time feel Id expect about same results Used properly correct battery prop motor should give LOTS LOTS continuing funeconomically what plane Well obvious choice PT thats Put motor nose Two-Meter Glider 8 x 4 direct-drive prop youve got simple effec tive power systemand thats cheap may competitive higher performance cobalts want fly Electric fun budget way go course complete economy system in160 Model Aviation
Edition: Model Aviation - 1989/03
Page Numbers: 52, 53, 158, 159, 160
RICHLAND UPDATE 1989 AMA NATS will held Richland WA July 15-24 plan having Thermal site F3B site Slope site could just boost Slope Soaring needs know will official Slope competition am sure Wil Byers rest Tn-City Soarers will best show off what Slope Soaring has offer Plan attending showing rest modeling community commitment lief best segment RC modeling Also plans next Scale Slope Soaring Fun-Fly well under way Last years probably Soaring event year years looks better fun-fly may extended four days include hobby expo information upeoming hap penings Richland contact Wil Byers 632 Meadows Drive E Richland WA 99352 Sailplanes International first column cluded couple photos Solent Sailplanes catalog received letters ques tions about get copy catalog Un fortunately US supplier no longer bus iness posed definite problem locating catalog help Dan Danrich finally able find original supplier catalog England interested address Sailplanes International Unit 6 Cwmtillery Industrial Estate Abertillery Gwent NP3 lLZ organization offers Sailplanes ranging simple built-up trainer some truly gorgeous all-glass Scale ships Penetrator couple years ago saw photo beautiful little Slope ship de signed after P-Si Mustang time didnt have other information about plane things got kind busy pretty much pushed back thoughts searching Out its origin last spring saw another photo plane built Harley Mi chaels through him able find out everything needed know Penetrator kitted John Fotiu JM Glascraft features lightweight epoxy glass fu selage foam wing cores sold either basic deluxe kit basic kit includes glass fuselage foam cores basic hardware package full-size plans deluxe kit includes above plus necessary wood complete model complete hardware package ba sic kit will run $54 deluxe kit $7650 fuselage wing cores excel lent quality kit really difficult build some experience working glass foam would definitely help As flying Penetrator thrill half provides outstanding high-speed perform ance extremely aerobatic just 50In span weighing less 20 oz Penetrator doesnt strike observer likely well suited high winds fact though ship really its element wind blowing 30 t name Penetrator nothing looking unbridled performance wrapped up beautiful little airplane Penetrator John has recently introduced D version Penetrator scalelike appearance D version comes clear bubble canopy looks great done up military finish information write John JM Glascraft 30820 Mayflower Roseville MI 48066 Super Cheetah Cheetah radiocontrolled Sailplane intended Aerobatics Combat plane also makes great aileron trainer sport flier Its maneuverable rugged inexpensive wing section best compromise speed handling lowlift conditions Its maneuverable virtue its aileron elevator control its 64-in span makes ideally suited average flier plane rugged because cross-linked polyeth ylene fuselage almost impossible destroy unique covering wing stab fin very resilient Cheetah has special quality allow ing radical experimental flyingif goof little lost makes great plane wishes extend flying skills will extend range flying sites very small sites very small landing areas can now used Cheetah above carefree airplane sorts Slope Soaring fun above standard pitch put out Larry Robert Pettyjohn Cheetah Models Unlike other ads pitches though bit about Cheetah really representative Sailplane Cheetah say Cheetahs greatest asset worry-free flying brings Because its inLeft Although Kirby Nelsons first attempt Slope design looks like real winner Vertigo spans 62 uses E387 airfoil weighs 38 oz Photo Kirby Nelson Right wings pivot control roll 60-in-span Aerrow makes great lightweight Slope ship Mark Hees designer friend Steve Moss built two Aerrows tear up skies central Texas Photo Mark Hees 52 Model Aviation Radio Conoi Slope Soaring Mark Tnebes 20794 Kftlsler Ct Saratoga CA 95070 JM Glascrafts Penetrator Despite its small size Penetrator provides high speed perform ance incredible aerobatics fiberglass exceptional Photo Harley Michaclis Looking ultimate Combat fun ship its indestructible fuselage easily re placeable parts Super Cheetah just ticket Text has details address destructible fuselage easily replaced expensive parts youll willing push Cheetah its limits beyond Just knowing rugged easily can repaired really adds flying enjoyment Most Sailplanes build scratchbuilt Some have much 200 hours work except competition situation am usually reluctant push hard would really like Cheetah allows go out really throw airplane around Isnt what pure Slope Soaring about Cheetah comes two versions stock Cheetah spans 48 will cost about $43 Super Cheetah spans 64 tapered wing runs about $49 Both Sailpianes use same fuselage tail feathers difference being wing fuselage comes six different colors red blue yellow white orange black Building Cheetah very simple shouldnt pose problems novice builder information Cheetah can contact Larry Robert Cheetah Models 14725 Bessemer St #B Van Nuys CA 91411 Slope Racing airfoil design interesting piece appeared November issue La Sierra Slope News newsletter La Sierra Slope Soaring Club Written Mike Reed contains some very helpful interest ing information choosing airfoil Slope RacerContinued page 158 #ALL PARTS PRECUT & PREPAINTED *jJflJJ & FLY IN TWO HOURS R AIRPLANES 1521 MORNINGSIDE DRIVE BURBANK CA 91506 USA [ CATALOG $750 Contains lOOus paper airplanes jostage stamp size 6 foot wing span Gliders rubber powered Die-cut youcut Largest known source paper airplanes world Cost catalog deducted 1st order over $2500 ASTOUNDING Caatog CORSAIR pape aLtplane above $1050 pL $250 pohage aiy SUCKER-KIT$5995 VHS Show & Tell Video$3995 Add $400 shipping & handling Ml residents add 45h sales tax Send 3100 SASE product list samples real wood veneer skins Product List Includes Gapless Arrow Shaft Hinges Carbon Tow Mylar Sheet High-Tech items Dealer Inquires Welcome SEND CHECK OR MONEY ORDER TO March 1989 53 An old Spirit 75 flies off silver dump back Aspen Mountain Ac cording its pilot Craig Angus eleva tion site about 12000 ftwhich translates fast flying Plc Karen Angus $475 AVAILABLE AT AMERICAS 0/S TRIBUTED BY FINEST HOBBY SHOPS SMITh LED ff8 135587550 San Geb,eI Soad cadero cA 53422 450-1717 14 Wingspan Paper Flying Scale Model Airplane $7 00 popular sites Southern uai ifornia Point Fermin offers Slope flier big lift Bill Sprague gets little body English help friend Sprague photo SUCKER-KIT manually controlled vacuum bag system makes lay up process combination foam & skins trouble free fast first time Composite Aircraft Eng & SupplyPO Box 866 Lapeer Ml 48446 313 664-3330 VINYLWRITE CUSTOM LETUTERING Providing elegant time saving economical finishing touch modelers U TO APPLY ering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligningindividualletters decals text custom computer cut 3M Premium PEEL INGcast vinyl only2 mu thin ical horizontal text om lengths olors 6 typestyles inc MiIita Block ted upright text high Priced right no minimum charge example can have AM4 number 2 high PEEL OFf ThE CARAIER TAPEtext color $330 P & H STEP BACK CE . Call write complete info AflordmpmceusedapoerecnAMA YOURE DONEpack & sample IT S FREE Fly NYLWEITE Custom Lettering model today VINYLWEITE CUSTOM LEFIERING ______________ 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 Noon 6PM Pacific order CA ru add taL RC Giant Scale/de Vries Continued page 51 program will draw em up 36 chord program prices range $3495 $8995 An SASE will bring info $3 will provide computer screen printout program choice Only caveat Glenns programs compat ible Hercules Graphic cards finally got see Eldon Linds Magic Magnet Builder flesh Its jig system wings fuselages based flat 48-in sheet grid ded steel certainly will add precision Gi ant model construction Eldon has redesigned fuselage jig holders has developed magnetequipped clamp appears versatile youre tired pin-dented fingers drop Eldon line 3151 Caravelle Dr Lake Havasu City AZ 86403 telephone 602/453-7970 Although noted Bob Banka Scale Model Re search 2334 Ticonderoga Way Costa Mesa CA 92626 714/979-8058 above amazed yours truly news now stocks 2200 dif ferent photo paks plus host new three-views 88/89 catalog due out about time read Three bucks will get copy Although weve noted before pages some best documentation threeviews ever drawn late great Paul Matt put pen Mylar could well assured hed researched subject thor oughly could back up efforts completely Paul studio behind house held ver itable treasure trove documentation data held photographic darkroom museumquality model collection walls lined jampacked file cabinets two-car garage filled books published Strange say drawing board bedroom event passed some question fate original fullsized drawings appeared reduced-size form Historical Aviation Albums model airplane magazines heart ened learned Sunshine House Inc acquired Pauls drawings now available again Sunshines Aviation Heritage Library catalog lists sale along books aviation enthusi ast address 806 Lockport Road PO Box 2065 Terre Haute IN 47802 phone 812 2323076 also have order number 800 9990141 Keep Big Birds flying RC Slope Soaring/Triebes Continued page 53 As Slope Racers demand models other form Soaring Slope Gliders have clean retain aerodynamic efficiency other words lift-to-drag ratio LID should high possible Structurally Slopers have withstand high G maneuvers occasional glance other aircraft well landing unforgiving rock-infested terrain difficult design Sailplane fast straight level flight Slope Racers must exe cute 1800 turns end course Slope Racing Sailplanes few design factors important airfoil selection 15%-thick high-camber airfoil used Sailplane will have too much lift several ounces pounds ballast will needed trim Sail plane airfoil will great performing turn long straight section course will too slow real competition other hand modelers modify Sailplanes using too thin airfoil section often drop out competition just opposite reasons instance model using 6%-thick airfoil less camber will surely pass 15% model straight level flight wing loadings identical tight turn 6% model will have use angle attack 15% model keep turn tight true causes drag airflow separation moves ward toward center lift Often case highly loaded model thin lowcamber airfoil goes turn mushes-out tip stalls no doubt end race Sailplane Slope Glider goes bank turn wing must generate lift counteract ertia bank 600 requires wing produce twice effective lift 2 Gs 850 model will experience 9 Gs angle attack model too thin airfoil will very high thus producing large amounts drag However thicker airfoil camber will require less angle attack perform same turn re sulting less drag less speed reduction information should kept mind select ing airfoil Slope Racer Another factor concerning airfoil selection type lift available slope site Sail plane designed fly well slope can dog another happy medium must main tamed model going used different slopes plane flown slope model can optimized parDARNED GOOD AIRMEN Lightest pilots available Lifelike vinyl latex rubber Build Sportsman Barnstormer Full Body Bust BUST PILOT KIT Contains pilot head helmet sport cap goggles lackel Easy assemble finish Price 00flO scale NEW 595 895 795 nv-,4 suww #103-A scale 1495 JET PILOT KIT Pilot has molded let helmet Contains face mask oxygen hose Extreme ly Realistic Weighs lass oz Price #SOO-1/s scale ... 595 #307-A scale695 ORDERING INSTHuIIuN See dealer first order direct Add $100 shipping NYS residents add 7% tax Sand check money order CODS OK Send $100 catalog FULL BODY PILOT KIT Contains pilot head hands boots helmet cap goggles full templates easy instruc tions Easy assemble finish Some simple sewing required Fully positionabte tool Price #206-R scale095 #205-1/i scale995 #2041/4 scale1095 #2031/3 scale1695 * Some aImplO sewing requIred See Dealer add Dollar direct order handlIng 158 Model Aviation RADIO CONTROL SHORT KITS FOR THE SPORT MODELER A1F BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AHD TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL Phone 845/459-0417 MORE SINGLE ENGINE FIGHTERS fOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F40 TOMAHAWK 55 SPAN3750 p39 AIRACOBRA 55 SPAN3750 P-51D MUSTANG 54 SPAN3750 C203 FOLGORE 56 SPAN3750 FOCKE WULF 190 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONET ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD $750 TO WING MPG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND $350 FOR PRODUCTS CATALOG ticUlar lift Condition speed wind/lift produced slope good place start far wing thick ness concerned 10% two-meter span favorite Semisymmetrical airfoils range especially laminar flow ones can loaded up 13 oz/sq ft still turn re spectable radius Variable sweep wings Envision low-speed stability great turning ability wings extended straight out high-speed stability credible straight-line speeds wings swept back too difficult design Sailplane great low-end top-end turning character istics design character istics another matter Could variable sweep answer Undoubtedly control mechanism system would extremely complex would have sweep wings both forward backward shift ballast forward backward accompany change CG wings moved have strength take heavy loads Slope Racer encounters Could such system de signed Would compact light enough work Sailplane havent caught yet above chal lenge engineering types out have looking something could revo lutionize RC Sailpianes chance Pivoting wing Aerrow may have taken few years Sailplane fliers get away traditional control systems try some thing new advent unique effective systems such wingerons fi nally catching Mark Hees Leander TX sent some info photo Aerrow id like take opportunity tell about little ship call Aerrow 60-in plane pivoting wings roll control features built-up construction no dihedral thinned 95% E374 airfoil Flying weight about 18 oz may fast some full-blown Slope ships still flies well winds up about 25 mph no ballast central Texas hills generally small covered trees landing areas tight Also winds usually gusty planes have able penetrate during gusts also have ability float out lulls between Aerrow being aerodynami cally clean light wing loading seems just ticket conditions Carbon fiber joints such advanced materi als carbon fiber Keviar being incorporated Sailpianes more some questions beginning appear example what kind adhesive best use materials official research group South Bay Soaring Society precisely Reinhard Lahde Bob Bayard have put tremendous amount time researching modern materials following report some findings ap peared SBSS newsletter Silent Flyer process continuing some work us RB started strength wing spars felt need find best way glue strips carbon fiber/epoxy laminates other other materials such spruce note reports findings glue strengths al iphatic glue gap-filling cyanoacrylate three types epoxy fast 5-minute medium-speed 30-minute slow slow epoxy kind sets up about three hours best left overnight harden strength interested shear strength ability glue joints resist sliding breaking along glued surface As typical test sample strip carbon fiber laminate glued its upper lower surface spruce have tested CF/spruce also CF/balsa CF/CF joints Epoxy does bond well epoxy sur face carbon fiber/epoxy laminate lam inated surface partially unsanded CyA somewhat tolerant some shiny surface spots laminate Best course sand laminated surfaces until no shiny spots re main results report based no shiny spots laminate preparation though rea son know about shiny spot problem too thorough sanding earlier phases inquiry 1st US RIC Flight School Stop Crashing Start Learning Dave Scott Most Experienced Instructor North America Over 3000 hrs flying time time profes sional instructor ue science instruction cannot imitated anywhere ything provided school ially designed Ulti mate Trainer ly 30000 air-miles flown Original training handbook ning success rate Lovely vacation arealfield prices foodlaccomodations ACT NOW CLASSES FILLING FAST Info pack $200 1st US RIC FLIGHT SCHOOL 521 S Sawyer. Shawano WI 64166 7151524-2985 March 1989 159 IS vvsv,~ o IONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT S HARD TO BEAT THEY NAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE A-26 INVADER 68 SPAN . 6495 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 h proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT EPROOUCTSCORP AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $20000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861 NEW BY POPULAR REQUEST LARGE SCALE ENGINE CYLINDERS PRATT WHITNEY WASP 4 WRIGHT J-5 WHIRLWIND Molded high-impact styrene dummy cylinders feature deep cooling fins utmost realism Both Wasp Whirlwind types cylinders available two different large scales 1/5th 2 4th 3 ts include assembly instructions Smaller sizes also offered Note units may modified resemble other cylinder types Send $3 full-color catalog featuring aircraft paintings suitable framing WILLIAMS BROTHERS INC DEPT MA 181 PAWNEE STREET SAN MARCOS CALIFORNIA 92069 best joints made least glue clamping two pieces squeezing out ex cess glue made joints thicker glue glue pulled apart chunks rather shearing along whole surface strength very low no about one-fourth strength well-made joint good joint between CF balsa fails pulling slivers balsa off piece glue torn Bonds between two materials weakest Glue joints between CF spruce much stronger CF/balsa fail combination pulling some splinters out wood shearing some glue itself Joints between CF CF fail mostly separating gluelaminating interface well-sanded surfac es strength CF/CF joints close CF/spruce maybe bit Some joints taxed tension machine reengineered order break sam ples Aliphatic glue makes weakest bond tested Next 5-minute epoxy fast epoxy somewhat weaker slower epox les cyanoacrylate strongest quite bit being about twice strong slowest ep oxy four times strong fast epoxy average breaking shear stresses sam ples CF/CF CF/spruce given below Glue Average Strength psi Aliphatie 1220 Epoxyfast 5-mm 1530 Epoxymedium 30-mm 2190 Epoxyslow 3-hr 3410 Cyanoacrylate 6560 summary want good joint tween CF/epoxy laminate spruce other laminate sand until shiny spots disappear clean put Slow Zap squeeze extra glue out Thats best joint Well thats about month Coming near future will column dedicated purely flying wings canards have know exciting wings canards would like see included feel free send some information photos RC Electrics/Kopski Continued page 55 leads return past topic Economy Electric say past because back August 86 issue addressed great length topic get Electric economi cally really realizing have seriously revisited subject inany depth since So guess what Readers have both inquiring about reminding fact some have hinted Ive abandoned subject area least intentionally Ill now try make up lost time time referenced economical Astro motor can style worked very well used motor several years did local Electric-flyin friends writing column Astro dropping economy motors its line setting up concentrate much higher quality product ar ray now place So what recommended August 86 issue immediately obsoleted has brought letters over years still does specifically lots readers still have either burning interest pressing need thing ECONOMICALLY Putting straightforward fashion Some modelers have limited resources simply able go best merchandise kinds considerations reason wrote col umn first place Does mean should deprived Electric enjoyment DEFI NITELY NOT Having just offered some info Great Planes PT its Thrustmaster motor let fer motor excellent example eco nomical way power economy Etectric Thrustmaster available separately around $25 retail think motor can buy confidence use different 05-size planes No its cobalt No brushes replaceable Yes its relatively heavy its power handling capability BUT will fly fly fly heck out model finally wears out whatever should very much have gotten moneys worth Out effect motor throwawaybut what After potentially several hundred Yes really mean several hundred flights really cares Ive flown economy can motors hundreds flights experience did include Thrustmaster time feel Id expect about same results Used properly correct battery prop motor should give LOTS LOTS continuing funeconomically what plane Well obvious choice PT thats Put motor nose Two-Meter Glider 8 x 4 direct-drive prop youve got simple effec tive power systemand thats cheap may competitive higher performance cobalts want fly Electric fun budget way go course complete economy system in160 Model Aviation