NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre
Edition: Model Aviation - 1989/07
Page Numbers: 94, 95, 96, 99, 100, 175, 180, 181
NO OCR TEXT sweptwing aircraft nicknamed Skate because its striking resem blance manta ray Skate utilized two afterburning jet engines water tight fuselage incorporated retractable step takeoff speed fuselage rose up step clearing wings wa ter Convair built radio-controlled pro totype model tested San Diego Bay company experimented variety hull step shapes tow ing models behind high-speed boats dur ing testing During same period National Ad visory Committee Aeronautics NACA now NASA turned its attention de velopment hydroskis improvement over water floats advantage skis could retracted fu selage drastically cutting aerodynamic drag As further advantage skis could mounted shock absorbers thereby minimizing pounding attendant highspeed operation Convair selected Navy con duct comparative study conventional hulls versus hydroskis Applying its knowl edge both hull design fighter aircraft such YF-102 design Convair pro posed delta-winged fighter hydro skis January 19 1951 Navy Bureau Aeronautics ordered two prototypes design built Probably influencing Navys acceptance fact Con vair XF-92A regular flier Edwards Left As can seen screw holes skis lot different landing gear positions tested ski suspension system sup ports landing gear creates tremendous amount drag Right Although full-scale Sea Dart two engines models intakes converge duct fan duct fan intake area 25% larger duct fan area recommended Tom Cook calculations July 1989 95 attempt take off resulted hitting hidden tree stump damaging two front ski struts wing tip elevon pilot figure removed safety before flight testing Without wing tip rockets acting wing floats tne sea Dart will tilt side cause poor handling water slow speed Once power applied however straightens out author James Gilgenbach bestows special blessing unto Sea Dart just prior starting engine Great care must taken ensure loose articles sucked fan intake during start-up Left full-scale Sea Dart required mile water lift off Pictured first Convair Sea Dart Bu No 137634 different en gines paint schemes ski arrangements paint scheme photograph selected model Right same Sea Dart flight over San Diego its skis lowered must have caused sluggish performance airplane over 250 test flights Left third Sea Dart Bu No 135763 flown Its paint scheme reflected military markings proposed time Currently airplane displayed outdoor aircraft exhibit Naval Air Station Willow Grove PA Right first Sea Dart again Bu No 137634 shown taking off after being retrofitted large single ski Initial tests arrangement proved less stable during takeoff original twin-ski arrangement being less complex retract maintain potential further development Air Force Base first Sea Dart XF2Y-l Ru No 137634 launched Convair De cember 16 1952 taxiing tests began profile wings short span 33 San Diego Bay aircraft small ft 8-in because delta platform about size F-86 Sabrejet side Continued page 99 Left Originally 16-oz fuel tank installed front fan unit location however caused unacceptable cnange iAi wnuie flight three smaller tanks subsequently installed under duct fan tube Right Futaba FP131S servos used control elevons rudder throttle balance installed far forward possible battery receiver installed nose 96 Model Aviation first powered two Westinghouse J34WE-42 turbojets delivering 3400 lb static thrust gross weight 16527 lb beginning water taxi tests obvious hydroskis required further development speeds above 60 mph pounding twin skis against waves subjected pilot se vere shaking gave airframe quite beating takeoff speeds least 140 mph clearly unacceptable After minor modification skis test pilot Sam Shannon made first official flight August 9 1953 Once air aircraft handled very much like other high-performance jet fighters its day Sea Dart refitted afterburning Westinghouse J46-WE-12B en gines new modifications twin skis necessary effort soften high-speed taxi pounding 6000 lb thrust apiece Westinghouse twins upped gross weight aircraft 22000 lb changes implemented degrees Tests various modifications XF2Y-ls skis continued mid1954over hundred second Sea Dart Ru No 135762 completed early 1954 designation changed XF2Y- 1 YF2Y- 1 de noting advancement prototype pre production aircraft Basically same first second aircraft used ex plore high-speed performance control characteristics aerodynamic performance Piloted Convair test pilot Charles E Rich bourg went past Mach 1 shallow dive 34000 ft August 3 1954 Just Continued page 100 Left A tail wheel incorporated water rudder allow steering both land water necessary add exhaust aenector enhance handling water Right outer tubes rear struts made 1 7-ozIsq-yd Keviar inners aluminum tub ing skis constructed 1/8-in plywood balsa open back allow sink stationary water Left The elevun-actuating raa seaiea wiin smaii iengtn OT Tuel tubing prevent water entering inside aircraft rear car bon fiber wing rod takes lifting load off actuating rod Right large vertical stabilizer used full-scale Sea Dart ensure good lateral stability paint scheme fin designed allow aircraft attitude identification in-flight photography operations July 1989 99 Two tanks 6 oz 12 oz installed under engine position duct tube third 6-oz tank mounted engine cowl left side duct tube total 24-oz fuel capacity still less 12 minutes flying time full throttle few months later November 4 1954 Richbourg piloting plane low over San Diego Bay during public press demonstration traveling about 575 mph plane disintegrated midair killed instantly Navy suspended Sea Dart operations until Navy accident board completed vestigations cause accident never determined degree cer tainty Navy canceled highspeed aerodynamic testing third Sea Dart YF2Y-1 Bu No 135763 first flown Billy Jack Long March 4 1955 craft equipped ultimate twin-ski configuration confirmed through prior testing Pilot Long continued testing XF2Y-l retrofitted large single ski along twin-ski YF2Y- 1 until April 1957 project appeared have lot potential Navy officially ac cepted Sea Dart its own evaluation June 1955 report summarized find dings follows YF2Y-l twin-ski model proved supe rior XF2Y-1 single-ski aircraft hydrodynamic standpoint except intol erable vibration during takeoff takeoff distance mile unac ceptable Sea Dart directionally unstable water high speed Although still cognizant need waterborne craft Navy forced cancel entire development program late 1956 limiting its scope carrier-borne aircraft due funding shortage time cancellation Sea Darts performed over 300 test opera tions original XF2Y-1 handling over 250 Navy lavished same engineering effort Sea Dart F-102 F-106 results undoubtedly would have different Navy ulti mately could have created highly efficient mobile weapons system Conceivably Sea Dart could have converted Snow Dart capable being based snowcovered wastelands polar regions Currently prototype XF2Y-l Bu No 137634 can seen old Martin air field Baltimore MD number three aircraft Bu No 135763 sits outdoor aircraft exhibit Naval Air Station Wil low Grove PA number four aircraft Bu No 135764 scheduled restoration display San Diego Aerospace Museum number five aircraft dis play SST Museum Kissimmee FL Portions previous data Sea Dart taken Delta Wings written Charles Mendenhall published Motorbooks International Osceola WI interested history delta aircraft development book offers wealth information subject Model design considerations interest building flying Sea Dart model came about through looking some new challenges no building experience either ducted fan RC aircraft sea plane ducted fan seaplane seemed like great idea fact vaguely remembered such hybrid existed growing up earlX 1950s After re searching various books jet fighters came across Sea Dart love first sight knew compelled build fly ducted fan Sea Dart foreseen amount time project would consume Id probably have taken different approach once begun no quitting until Id finished Before laying down single line drafting board collected much data possible ducted fan systems avail able since entire aircraft would de signed around fan system selected Al though initially difficulty getting formation help various ducted fan manufacturers Tom Cook Jet Model Products very responsive advice recommendations invaluable de termining aircraft would have designed maximize ducted fan con cept system finally selected Dynamax fan unit powered OS 77 Tom Cook suggested consider utiliz ing two ducted fan units model par allel twin-engined prototype Prelimi nary calculations showed however us ing two fans would produce much larger model wanted 1 decided use fan unit adapt dual intake ex haust single chamber internally Tom supplied practical guidelines designing Continued page 175 100 Model Aviation Left The skis parallel direction travel Unfortu nately arrangement causes lot drag air wheel landing gear isnt scale works well Above Non-scale rockets installed improve slow-speed handling water Convair Sea Dart become operational Navy system proba bly would have developed hang rockets under wings relatively small wing area low power its amazing full-scale Sea Dart ever got off water model gets off grass scale wings difficulty pad ia screwed plane wire will securely pressed between pad fuselage minimize wire failure point Help needed 89 Nats received letter Bob Dalton Wayne Foster requesting sistance during years Nats Richland WA year Nats manpower requirement CL Racing extensive Bob has asked anyone can provide timing modelprocessing assistance please drop him note 1455 South Peacehaven Rd Clemmons NC 27012 As always solicit comments photos share readers Whistle/Tierney Continued page 92 stored eight-bit bytes inter nal registers processor pur poses entire string bits can consid ered 48-bit word processor contin uously scans switches compares new input switch state previously stored its memory Any change switch state will stored 31M evaluation will begin bell set task begins processor applies mask containing possible triplets could occur bit pattern mask simplified terms oriented according bit position triplets mask recognize bit 1 part triplet method requires some time during evaluation process bit must first accomplish entire bit pattern shifted bit position mask reapplied process continued until 46 48 bits have shifted bit #1 position remaining two shifts performed since two bits cant constitute triplet no match found bell turned off scanning continues Complicated time-consum ing sounds execution process times duration beep heard pin removed replaced however match found bell re mains program returns switch scanning Since change state switch contact what triggers evalua tion process replacement of offending pins will result no-match eval uation turning bell off Construction Since full-size circuit board pattern approximately 86 41 beyond scope article publish etching drilling guide light fact have made arrangements local company provide partial kits completely assembled tested con trollers company actually stu dent coalition son mem ber will anything mow grass custom fabricating electronic cir cuit boards little help dad have built couple Eagle 63s pricing has established follows MUM EKE U BUUEEU SIG GLOW FUEL MANUFACTURED WITH THE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL PINT QUART GALLON 0% Nitromethane$1075 5% Nitromethane$365$525$1275 10% Nitromethane$415$550$1475 15% Nitromethane$430$635$1675 25% Nitromethane$515$795$2195 35% Nitromethane$595$925$2695 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1425 15% Nitromethane$1625 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure youve paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfPrices sobjoct change withoot notice See dealer first available order direct Call IJ 800-247-5008 toll free orders Latest Catalog $300 MANUFACTURING CO Montezuma IA 50171 2X photo-ready etching drilling guide $500 Custom-programmed EPROM$1250 Etched drilled printed circuit board plated-through holes$2500 Assembled tested controller board $10000 address SJB Custom Attn Jason Tierney 9788 Ralph Road Whitesville KY 42378 sure specify interested RC Pinboard Controller project bit costly earlier model hope its simplicity versatility can indeed write final chapter third-order intermod monitoring flying field Happy Flying Sea Dart/Gilgenbach Continued page 100 fan intake exhaust primarily concerned about maximizing static thrust taking off water Since top speed full-size Sea Dart 670 mph 1/9-scale model wouldnt have go over 100 mph give good scale effect Tom also recommended build model light possible achieve takeoff July 1989 175 water expected flight perform ance dictated use composite ma terials wherever strength required balsa nonstress areas Being relatively unfamiliar compos ites needed help expert field After contacting several composite material suppliers good fortune discussing design problems Mr George Sparr owner operator Aero space Composite Products ACP did George teach finer points com posite material use company wide variety carbon fiber Kevlar fiber glass epoxy products se lected best materials given ap plication Knowing start project would require hours sport Pattern aircraft previously built deathly afraid radio failure interference destroying fruits la bor agonized over what radio system use Since experts maintain PCM type radio has superior ability reject interference began gathering infor POLISHED Approach MONOKO TE APPLICATION NEW MonoKate HOT SOCKTM simple easy-to-use cover irons shoe virtually eliminates surface scratches Its buffer 100% cotton between hard shoe iron mirrorlike finish MonoKote Results air Monokote application hazing scratches New life old iron shoe Fantastic wingtips solid surfaces . wherever cover MonoKote Only TOP ELITE else r Top FLITE MODELS Inc 2635 So Wabash Ave Chicago IL 60616 mation various PCM systems avail able needed maximum five chan nels did want dual rates servo revers ing powerful tight waterproof ser vos Futaba Conquest PCM system FPl 31 S servos ultimately se lected has excellent range though buried antenna inside fuselage smoothness response resistance interference Its relatively low price doesnt hurt either Once fundamental decisions made Id sat down drawing board first step draw Dyna max fan unit OS 77 engine exhaust tube Several fuselage outlines drawn over components determine optimum scale scale 1/9 appeared ideal Very early process concluded rotating engine fan unit would necessary allow full cowling en gine hatch removal required devis ing different mounting method fan unit decided strap unit cradle using silicone sealer shock-absorbing material didnt work Id forced remachine engine mount Im sure Tom Cook would recommend tunately cradle idea worked well next design step calculate finished weight wing loading air craft 1/9-scale Preliminary calculations suggested 10 lb appropriate weight would produce wing loading 225 oz/sq ft overall However since flying wing uses about 75% its area lift ing remaining 25% acting hor izontal stabilizer actual wing loading would increase 300 oz/sq ft Uncertain whether too high settled mak ing wings detachable bigger wings could substituted necessary concern added weight neces sary fully waterproof model knowing sure much extra epoxy paint would weigh continually moni tored during building cycle sev eral cases threw away some components because excessive weight made new ones Since Tom Cooks experience deltas normally come out tailheavy did everything possible avoid condition included locating ra dio system ducted fan unit far ward model possible full-scale Sea Dart had trouble steering water wanting repeat history designed water rudder ex haust deflector proved very use ful Composite material techniques ex haust tube first item made us ing composites After several attempts fi nally settled tube made 17oz/sq-yd woven Kevlar blue print pa per thats right type paper plans made technique mak ing tube follows First tape down some freezer paper onto wifes glass dining room table very dangerous flat surface tape waxed paper over freezer paper blue print paper over waxed paper Next cut piece 17-oz/sq-yd woven Kevlar slightly larger finished size lay over blue print paper Mix Sachs Customized TG 27 $35000 31 $38000 24 $40000 37 $43000 42 *45000 Torque Mount add $50 throttlacouplad spark advance TG MFG201 427-3845 857 HIgh Mtn Rd N Haledon NJ 07508 180 Model Aviation DEDICATED TO PERFORMANCE SINCE 1959 SYNIlC LUBNTS CATALOG 800-242-0489 Electric Flight f Coat roller Perfect 05 Motors 510 cells Has Brake nth Lightweight 12 OLmoney back Adjuotahie switching point Solderless terminal easy hookop goarat ON/OFF Controller $2495 very Power save weight 0120 Size 22x13L63 hrgh efficiency 006V loss Add SlOl shippist Colitorolo rosideoto odd 65% 5163 Too Send Check money order CoososroithHigh Sky Potato oossecsor ts~2 3929 Kansas St #9 other Coocectots areSan Dleno CA 92104 olso ovoiloblo up some Safe-T-Poxy spread onto through Kevlar making sure wet Keviar paper squeegeeing ex cess off using playing card lay waxed paper over Kevlar put large sheet flat glass over waxed paper place weights onto glass let laminate cure 24 hours Later paint paper side paper/Keviar laminated sheet black epoxy paint finished tube weighed mere 26 oz continued RC Soaring/Blakeslee Continued page 55 saddles cut oversize amount equal thickness wing sheeting saddles exactly size shape finished wing used during sheeting process mold wing maintain shape deli cate S-4061 undercamber balsa contest quality Special 9-to-lOlb-density hard balsa used ailerons flaps insuring strength very straight trailing edges one-piece wing mounted fuse lage recessed nylon bolt underneath pod can taped over contests hardware belleranks pushrods con trol horns included Plywood parts ma chine cut including rudder aileron flap con trol horns Spar cutouts center tip panel foam cores very precise Other spar con struction very little work required foam cores prior sheeting Full-size computer-drawn plans 30page building instruction book provided cause accuracy attention detail re quired both plans instructions very specific detailed Mariab beginners Sailplane Controls rudder elevator ailerons flaps Flying weight four servos 500 mAh battery 355 ounces carbon fiber boom receiver mounted under wing leading edge area CG 40% Mariah requires little no nose weight Price carbon fiber tail boom $160 Its $140 fiberglass cluding shipping Mariahs clean design accurate airfoil attention detail will apparent first flight penetrates very well turns dime will thermal slightest hint bubble Flaps extremely effective make hitting spot lot easier Mariab truly Two-Meter bird flies like wind PS letter Ed said Brian Agnew won everything 88 Nats put how-to-hand-launch-and-catch-thermals show~ new Mariah Ed said very happy see much Brian liked plane well performed him After contest Brian hand launched hour half de cided take /8 oz out nose have never seen anyone exacting Brian comes trimming Out plane does hand launching hour after hour Youth GREAT wonder Mariah flies better Scale Model Research photo DFS Meise/Olympia 14-color-picture Foto Paak set sold Bob Banka SMR Olym pia winner competition select one-design 15-meter ship flown 1940 Olympic Gameswhich course didnt happen D-4679 photographed new museum Wasserkuppe gliding hill Germany 6110. --- roduction parts new American designed 060 powered helicop ter mostly made US house now LEGEND kits shipped worldwide daily Reception worlds top fliers has far exceeded ex pectations LEGEND revolutionary its simplistic design engineer inq though LEGEND mostly made steel aluminum lightest weight helicopter its size Eight different helicopters can created LEGEND system choosing what best suits just few LEGENDS features new industry EASY TO FLY FLYBARLESS HEAD PREASSEMBLED SERVO TRAY CHOICE OF ROTOR HEADS SIMPLE TAIL BELT DRIVE PREASSEMBLED ROTOR HEAD GEARBOX OR BELTDRIVE TAIL TRIPLE BEARINGS IN EACH TAIL BLADE HOLDER AND MAIN SHAFT informationwrite call today 81 8-992-0195 FAX#81 8702011 74 h rnrnrnrnrnrn~ rn Mail Gorham Model Products INC 23961 Craftsman Road Calabasas CA 91302 lIVES Rush GMP flight demo video tape & catalog $2995 Add $3 postage handling $7 Federal Express Standard Air shipment Please indicate format IVHS IBETA liVES Rush me.lLGMPs illustrated color catalog $200 postpaid IVISA lMasterCard#___________________________________ ________ enclose check/money order amount exp date________ Name Address CityStateZip EA~ HINE5~ SUITABLE FOR ALL MODELS 112A thru GIANT SIZE fa ua dat /23 1 Cut thin clot hinge 21 AssenthIe dry 3 Apply few drops CA glue youre donet history modeling few products truly revolutionary example proportional radios ron-on coverings CA glues permanently chang ud way build fly models thus quality lutionary believe EASY HINGES ci have same type impact hobby EASY 4INGES easy install theyre guaranteed . 2ring smile face first lime use SH 710 Pkg 24 $2 gg 7de ete4 MFG CO INC Montezuma IA 50171 July 1989 181 yre