The Ryson Cloudster

THERES OLD adage want something done right have yourself few years ago aviation pio neer T Claude Ryan man built company built Spirit St Louis Lindbergh described him dis covered old adage quite true Ryans aviation business career has well detailed William Wagners fine book Ryan Aviator par ticularly emphasizes long hard years Ryan worked president Ryan Aeronautical Company late 1920s until 1969 sold company Teledyne Corp re tired Ryan readily admits during hectic business career gnawing within him able once again enjoy fun flying did early days great love flying never diminished during years strapped responsibilities running great avia tion company Now retired Ryan time enjoy type fun flying ex perienced early days started fly light contemporary powered airplanes disappointed find providing him pleasure flight desired art unpowered flight now appealed Ryan seemed provide closest approach fun flying perfect quiet flight Ryan put soaring free bird age 73 Claude Ryan revealing identity took gliding lessons learned fly sailplanes son Jerry joined him found dismay What would think encountered machine taxi strip glider-like wing spans 57 ft Sin wing foldable soaring flight fun too much work involved getting airborne Gliders power winched air towed altitude behind tow plane unnerving experience takeoff behind tow plane dis couraged Ryan glider always air borne first held down towplanes turbulence until tow plane took air too glider al ways return field takeoff landing anywhere else almost always meant glider dismantled trailered back other disadvantages Ryan tried European powered sailplanes motor gliders called seemed swer self-contained aircraft could flown aloft under its own power engine shut off flown sailplane However European motor gliders constructed wood powered converted automobile engines 46 Model Aviation Ladislao Pazmany stands beside Cloudster give indication its size Note unique airfoil drawing Ladislao proficient modeler well known homebuilt field Ryan knew could better son Jerry formed Ry son Aviation Corp gathered togeth er small group experienced aeronauti cal engineers aircraft constructors design build aircraft would made American standardsall metal proven certificated aircraft en gine Since goal optimum modern aircraft design construction techniques hired internationally famous aeronautical engineer Ladislao Pazmany chief engineer Paz well known among airplane homebuild ers PL series airplanes latest being PL-4A T-tailed low-wing design active member EAA has contributed much develop ment efficient aircraft average homebuilder What generally known though Pazmany old-time model air plane designer builder flier Born Hungary came Argentina three years old first model air plane made Meccano set built flew models 1937 built first balsa wood flying model Curtiss Robin became bookworm delving science flight ap plying models intricate mechanisms either stabilize retract landing gears etc won number contests well ma jor interest flying scale models studied aeronautical engineering col lege later taught aerodynamics trade school Argentina came United States became busy de signing building real airplanes no time models situation regrets Pazmany firmly believes designing building flying model air planes taught him much could have obtained merely reading books has often used model airplanes try out idea see new design might look holds private pilot glider license time Pazmany would like build radio-con trolled model Ryson Cloudster powered hy electric motor motor could completely stopped glider flight restarted needed case full size Cloudster ex-model builder Pazmany head ing small corps engineers chanics Ryson company labored two half years designing testing building aircraft felt would ultimate design per formance Finally result com bined efforts Ryson ST-lOO Cloudster unveiled first time January August1977 47 Pleasure class competition aircrafts major purpose Ramona Airport L R Jerry Ryan T Claude Ryan Pasmany Ray Cote test pilot Theyve ball 13 1977 Ramona Airport Calif I Claude Ryan proudly presented what considered fun flying machine Cloudster two-place ultra-effi cient airplane also excellent sail plane Its major features its all-metal construction use certificated air craft engine conventional landing gear outstanding performance both airplane sailplane Pleasure class competition soaring major purpose Cloudster engine used take its two occupants high altitudes shut down propeller feathered craft flown efficient sailplane has glide ratio 28 sink rate less 3 feet per second suitable upcurrents found pilot may restart engine fly another area cruising speed 135 mph 75% hp will get him faster equal-powered contem porary airplanes has options flying power either home base another airport may land power can operated conventional manner airport prototype based busy Lindbergh Field San Diego constantly flown out field mixed company airline jets other types airplanes Cloudster engineered 1 FAR Part 23 structural requirements 2 basic glider criteria FAA 3 OSTIV international airworthi ness requirements sailplanes re sulted ST-lOO having load limit fac tors 675 Gs positive 35 Gs nega tive exceeding required aero batic category Continued page 93 GENERAL SPECIFICATIONS External Dimensions Wing Span-8 Width folded wings0 Length Overall-64 Height Overall Wing Area213 sq ft Wing Aspect Ratio156 Weights Loading Empty Weight1212 lbs Useful Load438 lbs Payload soaring 9 gal fuel384 lbs Gross Weight1650 lbs Power Loading165 lb/hp Wing Loading775 lb/sq ft Fuel Capacity32 gal Seats2 Performance Maximum speed @ sea level gross weight150 mph Cruise speed 75% power @ 6500 ft135 mph Stall flaps down43 mph Rate Climb gross weight ft/min Service Ceiling24000 ft Takeoff over 50-ft obstacle950 ft Landing over 50-ft obstacle800 ft Range 32 gal fuel @ 75% power 135 mph 6 miles no reserve 48 Model Aviation Front view showing feathered prop distinctive wheel pants Power used take two occupants high altitude shut down prop feathered ship flown sailplane Flaps fully down photo wing folding line may detectable just outboard small flap sectionrather like Nelisss Chipmunk last issue Sink less 3 ft/sec Lanopy simpie ningeo sype sser soaring iign nyan nas option nying wun witnuot puwar home base another airport may land power belicrank installed near wing root cables led through pulley wheels aileron horns cable will remain taut wing halves disassembled fuselage servo connecting arm led end bellcrank out through root rib have used plastic tube bent right angles epoxied braces lieu pulley wheels course simpler Both methods work equally well commercially available fuel tanks suitable using larger en gines such Aerotec Quadra sources plastic bottles suitable needs Tanks edsily made up especially stick-a-tube method used Aerotec engine used 20-oz plastic bottle Quadra runs gasoline made up metal tank works very well could conceivably reduce possibility fire event serious crash Propellers fairly easy carve cluding laminated provided proposed prop laid out properly blank cut accurately close attention paid washout good sanding disc mounted headstock will easily shaping However owing availability good large props fair price hardly worth carve own except satisfy creational desires Whether bought home-made propellers should well balanced before use nearly cases hinges used flying surfaces miniature copies particular airplane being built Some surprisingly simple Others take little work form draw attention airplane field believe serious approach successful construction large miniature airplane must develop technique whereby concentrate total effort sound constructional meth ods applying whatever part project required manufac ture wheel hinge prop machine gun instruments coverings building techniques thorough investigation various construction possibilities should undertaken Effort direct ed manufacture item just complete program SOURCES Du-Bro Products Incorporated wauconda IL 60084 R Shettler Ent Pottery Road RR 3 Vernon BC Canada Kolbo Korp 230 N Crescent way Unit H Anaheim CA 9280 ja Homers Sales Dixie Highway Beecher IL 60401 Aerotec Model Engineering Co. Box 116 Lincolndale NY 10540 Btice Machine Specialties 8229 Compton Blvd. Paramount CA 90723 Midwest Industries Inc Ida Grove IA 51445 Hobby Shack 18480 Bandilier Circle Fountain valley CA 92708 world Engines 8960 Rossash Ave Cincinnati OH 45236 Model Rectifier Corporation 2500 woodhridge Avenue Edison NJ 08817 Fox Manufacturing Company 5305 Towson Ft Smith AR 72901 Also line propellers Cloudster/Shipp continued page 48 side Cloudster does appear sailplane Rather has lines 2-place Formula racer such animal made Perhaps reason test pilot Ray Cote owner pilot famous Shoestring racer comfortable Cloudster ever got involved soaring craft being built, thoroughly enjoys work test pilot often flying longer required just sheer fun Viewing craft underneath flies overhead reveals long tapered wing takes clean lines efficient sailplane type design landing gear received much consideration Most European motor gliders have single re tractable wheel fuselage sup porting outrigger wheels dangling wings requires pilot learn new ground handling techniques Ryan happy about Also taxiing low wing tips must carefully watched prevent hitting obstructions such boundary lights Ryson engi neers considered types landing gearssingle wheel bicycle arrangeAugust 1977 93 PROP DRIVE UNITi THIS SMOOTH RUNNING BELT DRIVEN UNIT OPENS UP WHOLE NEW DIMENSION IN 2 SCALE SPORT AND SCALE MODELS Now can build big have scale size working prop too Designed accept 60 size engine t unit will easily power airplanes weighing 20 lbs Now big old-timers extra large cowls arent impos sible anymore MAKES YOUR BIG AIRPLANE LOOK AND SOUND MORE REALISTIC @2022 AND 24 WOOD PROPS ARE AVAILABLE AT YOUR DEALER OR DIRECTLY FROM GRISH BROS OSLOW POWERFUL FLIGHT IS ACHIEVED WITH THIS UNIT MAKING THOSE OLD TIME AIRCRAFT EXPECIALLY REALISTIC 0 RPMS RANGING FROM 600 TO 5000 DEPENDING ON ENGINE AND PROP COMB 0 THIS UNIT COMES COMPLETELY ASSEMBLED READY FOR ENGINE INSTALLATION CAT NO 210 unit being used Dave Grayu u eruuoaro sport plane 0 S Max Goidhead engine 22-9 prop $10000 DU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA Dieselize Cox Engine No Glow plugs Power No Battery & Leads _____ economy Less noise Easily throttled Send SASE -literature Dealer inquires invited Conversion seconda No tools required Available 020 0491051 INTRODUCTORY PRICE $995 Includes uel Ask dealer add $150 p&h To order direct Conn Res add ST Davis Diesel Development Inc BOX 141 DEPT E MILFORD CONN 203 877-167006460 IGH Send $100 1977 illustrated cata log complete line Dealers inquiry invited Andrews Aircraft Model Co Inc US Rte 1 & North St Topsfield MA 01983 8878541 ment tricycle gear two-wheel tajidragger type advantages disadvantages carefully weighed twowheel tajldragger type selected Re traction main wheels found practically no advantage creased weight retraction mecha nism required larger wing resulting mere three miles-per-hour increase top speed Therefore main wheels fixed well streamlined tail wheel enclosed streamlined housing steer able may swiveled through 3600 ground Cloudster handles like other tajldragger strong gusty crosswinds Construction ST-100 conven tional metal entirely flush riveted basic alloy used aluminum 2024-T4 other aluminum alloys used extruded spar caps fittings miscel laneous components wing utilizes new Wortman FX-67K-170/17 airfoil has single spar located 40% chord point maximum thickness airfoil 57-8 span wing may folded storage trailering cutting width craft mere eight feet removing two shear pins wing may pulled outward telescopic tube about six inches rotated leading edge down folded back alongside fuselage outboard panel tips may supported cradle swivel joint center panel supports board part wing major innovative features improves performance craft aileron-flap interconnection during certain settings flaps electrical ly actuated flaps may operated through 840 up position ~l2o full down position 720 As flaps raised full-down position operate independently ailerons until reach 80 position lost motion device engages neutral point ailerons ailerons operate conjunction flaps point up full up flap position l20 Flight tests far have indicated crease cruising speed about 15 mph flaps full up position Cloudster does use spoilers flaps serve powerful airbrakes glide dive control fuselage semi-monocoque con struction sheet-metal frames bulkheads extruded aluminum string ers center panel wing built integral fuselage leadingedge torque box adjacent fuselage both sides forms two fuel tanks large removable panel rear right side fuselage permits access controls tail-wheel shock absorber Also provision attaching tow tripod tail Cloudster self powered glider may used tow other gliders instrument panel provided forward occupant easily visible rear seat seats designed accommodate parachutes cockpit ventilated heated onepiece canopy hinged right side has emergency release spacious interior carefully contour rounded no sharp edges Dual controls provided stick rudder brakes flaps propeller pitch throt tle vertical fin welded directly fuselage tail cone has sheet metal spar 45% chord rudder hinged fin three points hori zontal stabilizer consists spar six sheet-metal ribs intermediate foam ribs attached top vertical fin two bolts spar bolt leading edge pitot tube Braunschweig tube incorporated stainless-steel boom extending forward stabilizer leading edge center line airplane tips eleva tors removable reduce width craft transportation tached elevator piano hinges top bottom surfaces fiberglass fairing attached lower skin elevator slides inside vertical fin eliminate aerodynamic base drag intersection Bolted leading edge wing center section outboard fuel tanks main gear oleo-pneumatic shock absorbers designed fabri cated Ryson Aviation Corp wheels brakes Cleveland whole gear enclosed carefully streamlined fiberglass tail-gear shock absorber made solid rubber dough nuts separated aluminum sheet plates Power provided Continental 0200 engine 100 hp driving Hoffmann two-blade three-position metal propeller Propeller pitch control manual through handle right side cockpit forward position handle puts prop low pitch takeoff climb mid-position cruise full aft feathers propeller soaring flight propeller spring-loaded lowpitch position two-piece cowl propeller spinner made fiberglass Two large rectangular cut-outs pro vided aft section cowl cool ing air outlets Flexible aluminum cowl flaps attached can set position between full open full closed According Ryan ST part ST 100 has meaning 5 soaring power T touring power aircraft presently undergo ing flight test program performance figures being compiled date Cloudster has gone 24000 feet still climbing 250 fpm has over 100 hours air tachometer reads 45 hours test flights com pleted plans production Cloudster will made 94 Model Aviation Lightweight Permagloss ** Weighs Only zPerSqFt Thats light typical plane requires 15 square feet covering Permagloss would add 5 ounces Considering plane engine fuel prop controls etc would weigh about 60 ounces covering weight really isnt important Especially since iron-ons weigh practically same Thats fact less 1/10th ounce difference per square foot between So choose covering like hopefully Permagloss Because Permagloss iron-on covering made out 100% polyester fibres es have permanent shrink memory No sags no wrinkles also iron-on scuffproof Try Permagloss erence will obvious red white blue yellow orange olive drab aluminum 2 dazzling dayglow colors 5 x 36 goofproof trim sheets too CQVERITE 2779 Philmont Ave Huntingdon Valley Pa T Claude Ryan has finally realized ambition have some fun air plane Nearing 80 years age keeps younger people around him constantly run Cloudster out field sure attract curious aviation people Ryans almost boyish enthusiasm new product notice ably infectious chance gets Ray Cote has run flight test T Claude Ryan climbs rear seat can see him smiling thoroughly enjoying new airplane ACKNOWLEDGEMENTS Data Airplane T Claude Ryan Jerome Ryan Ladisalo Pazmany Bob Fro nius Ray Cole Adice Encouragement Drawing Bill Hannan Bob Peck 26th Model Plane Show Eiben Weimer continued page 51 own age group usually no two-year spread First through sixth graders compete three events Fly ing Non-flying Plastic models Sev enth through 12th graders compete six categories Free Flight Control Line Plastic Non-flying Powered Scale Radio Control event offers three trophy awards plus Honorable Mention awards unusual effort very common among kids also proud separate cate gory exceptional child event reward efforts handi capped youngsters heartwarming portions award cere mony involvement show close phone call hospital school system Finally also make kids work show Club displays security registration areas utilize energy wish adults some youth Open division NMPS covers adults over high school age partici pate nine RC events nine CL events ten FF events eight Plastic events Non-flying static models event six additional Ace categories No aircraft has ever turned away show Ace category special interest Former NMPS first-place-winning air craft automatically placed Ace category model competes against other first-place aircraft wins division model eligible display system encourages building new aircraft top-notch contest ants eliminated repeated wins model discourages other entries Open entrant also eligible seven special awards such Best Finish final note rules NMPS al lows contestant enter up six models per event However contestant can win trophy per event large event categories have evolved over years careful consideration contestants epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction instillation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass lavup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Paintinq Pointers brochure Write word glue request IEEiJ fl Division Pettit Paint Co Inc 20 Pine Street Rockaway NJ 07866 foremost complete program worth effort can lift contest professional level Professionalism also means concentra tion security judging NMPS always employs use heavy-duty stan chions roping secure models curious hands Grab biggest modeler around usually indoor flier locate roping arm length models addition completely manned exhibit area must NMPS least 50 properly identified individu als hand times three days Also although Mall closed night club officials maintained all-night security during locked hours judging took place Model registration runs Friday Sat urday closing Saturday evening Judging begins after somewhat quiet dinner extends well wee hours Although does require extra effort judges can ac complish enormous task rating 538 models interference crowd contestants Sunday spent relative relaxation contest officials able discuss public models display models tagged identification number cannot re leased until contestant presents matching claim check Aircraft August1977 95 Why3

THERES OLD adage want something done right have yourself few years ago aviation pio neer T Claude Ryan man built company built Spirit St Louis Lindbergh described him dis covered old adage quite true Ryans aviation business career has well detailed William Wagners fine book Ryan Aviator par ticularly emphasizes long hard years Ryan worked president Ryan Aeronautical Company late 1920s until 1969 sold company Teledyne Corp re tired Ryan readily admits during hectic business career gnawing within him able once again enjoy fun flying did early days great love flying never diminished during years strapped responsibilities running great avia tion company Now retired Ryan time enjoy type fun flying ex perienced early days started fly light contemporary powered airplanes disappointed find providing him pleasure flight desired art unpowered flight now appealed Ryan seemed provide closest approach fun flying perfect quiet flight Ryan put soaring free bird age 73 Claude Ryan revealing identity took gliding lessons learned fly sailplanes son Jerry joined him found dismay What would think encountered machine taxi strip glider-like wing spans 57 ft Sin wing foldable soaring flight fun too much work involved getting airborne Gliders power winched air towed altitude behind tow plane unnerving experience takeoff behind tow plane dis couraged Ryan glider always air borne first held down towplanes turbulence until tow plane took air too glider al ways return field takeoff landing anywhere else almost always meant glider dismantled trailered back other disadvantages Ryan tried European powered sailplanes motor gliders called seemed swer self-contained aircraft could flown aloft under its own power engine shut off flown sailplane However European motor gliders constructed wood powered converted automobile engines 46 Model Aviation Ladislao Pazmany stands beside Cloudster give indication its size Note unique airfoil drawing Ladislao proficient modeler well known homebuilt field Ryan knew could better son Jerry formed Ry son Aviation Corp gathered togeth er small group experienced aeronauti cal engineers aircraft constructors design build aircraft would made American standardsall metal proven certificated aircraft en gine Since goal optimum modern aircraft design construction techniques hired internationally famous aeronautical engineer Ladislao Pazmany chief engineer Paz well known among airplane homebuild ers PL series airplanes latest being PL-4A T-tailed low-wing design active member EAA has contributed much develop ment efficient aircraft average homebuilder What generally known though Pazmany old-time model air plane designer builder flier Born Hungary came Argentina three years old first model air plane made Meccano set built flew models 1937 built first balsa wood flying model Curtiss Robin became bookworm delving science flight ap plying models intricate mechanisms either stabilize retract landing gears etc won number contests well ma jor interest flying scale models studied aeronautical engineering col lege later taught aerodynamics trade school Argentina came United States became busy de signing building real airplanes no time models situation regrets Pazmany firmly believes designing building flying model air planes taught him much could have obtained merely reading books has often used model airplanes try out idea see new design might look holds private pilot glider license time Pazmany would like build radio-con trolled model Ryson Cloudster powered hy electric motor motor could completely stopped glider flight restarted needed case full size Cloudster ex-model builder Pazmany head ing small corps engineers chanics Ryson company labored two half years designing testing building aircraft felt would ultimate design per formance Finally result com bined efforts Ryson ST-lOO Cloudster unveiled first time January August1977 47 Pleasure class competition aircrafts major purpose Ramona Airport L R Jerry Ryan T Claude Ryan Pasmany Ray Cote test pilot Theyve ball 13 1977 Ramona Airport Calif I Claude Ryan proudly presented what considered fun flying machine Cloudster two-place ultra-effi cient airplane also excellent sail plane Its major features its all-metal construction use certificated air craft engine conventional landing gear outstanding performance both airplane sailplane Pleasure class competition soaring major purpose Cloudster engine used take its two occupants high altitudes shut down propeller feathered craft flown efficient sailplane has glide ratio 28 sink rate less 3 feet per second suitable upcurrents found pilot may restart engine fly another area cruising speed 135 mph 75% hp will get him faster equal-powered contem porary airplanes has options flying power either home base another airport may land power can operated conventional manner airport prototype based busy Lindbergh Field San Diego constantly flown out field mixed company airline jets other types airplanes Cloudster engineered 1 FAR Part 23 structural requirements 2 basic glider criteria FAA 3 OSTIV international airworthi ness requirements sailplanes re sulted ST-lOO having load limit fac tors 675 Gs positive 35 Gs nega tive exceeding required aero batic category Continued page 93 GENERAL SPECIFICATIONS External Dimensions Wing Span-8 Width folded wings0 Length Overall-64 Height Overall Wing Area213 sq ft Wing Aspect Ratio156 Weights Loading Empty Weight1212 lbs Useful Load438 lbs Payload soaring 9 gal fuel384 lbs Gross Weight1650 lbs Power Loading165 lb/hp Wing Loading775 lb/sq ft Fuel Capacity32 gal Seats2 Performance Maximum speed @ sea level gross weight150 mph Cruise speed 75% power @ 6500 ft135 mph Stall flaps down43 mph Rate Climb gross weight ft/min Service Ceiling24000 ft Takeoff over 50-ft obstacle950 ft Landing over 50-ft obstacle800 ft Range 32 gal fuel @ 75% power 135 mph 6 miles no reserve 48 Model Aviation Front view showing feathered prop distinctive wheel pants Power used take two occupants high altitude shut down prop feathered ship flown sailplane Flaps fully down photo wing folding line may detectable just outboard small flap sectionrather like Nelisss Chipmunk last issue Sink less 3 ft/sec Lanopy simpie ningeo sype sser soaring iign nyan nas option nying wun witnuot puwar home base another airport may land power belicrank installed near wing root cables led through pulley wheels aileron horns cable will remain taut wing halves disassembled fuselage servo connecting arm led end bellcrank out through root rib have used plastic tube bent right angles epoxied braces lieu pulley wheels course simpler Both methods work equally well commercially available fuel tanks suitable using larger en gines such Aerotec Quadra sources plastic bottles suitable needs Tanks edsily made up especially stick-a-tube method used Aerotec engine used 20-oz plastic bottle Quadra runs gasoline made up metal tank works very well could conceivably reduce possibility fire event serious crash Propellers fairly easy carve cluding laminated provided proposed prop laid out properly blank cut accurately close attention paid washout good sanding disc mounted headstock will easily shaping However owing availability good large props fair price hardly worth carve own except satisfy creational desires Whether bought home-made propellers should well balanced before use nearly cases hinges used flying surfaces miniature copies particular airplane being built Some surprisingly simple Others take little work form draw attention airplane field believe serious approach successful construction large miniature airplane must develop technique whereby concentrate total effort sound constructional meth ods applying whatever part project required manufac ture wheel hinge prop machine gun instruments coverings building techniques thorough investigation various construction possibilities should undertaken Effort direct ed manufacture item just complete program SOURCES Du-Bro Products Incorporated wauconda IL 60084 R Shettler Ent Pottery Road RR 3 Vernon BC Canada Kolbo Korp 230 N Crescent way Unit H Anaheim CA 9280 ja Homers Sales Dixie Highway Beecher IL 60401 Aerotec Model Engineering Co. Box 116 Lincolndale NY 10540 Btice Machine Specialties 8229 Compton Blvd. Paramount CA 90723 Midwest Industries Inc Ida Grove IA 51445 Hobby Shack 18480 Bandilier Circle Fountain valley CA 92708 world Engines 8960 Rossash Ave Cincinnati OH 45236 Model Rectifier Corporation 2500 woodhridge Avenue Edison NJ 08817 Fox Manufacturing Company 5305 Towson Ft Smith AR 72901 Also line propellers Cloudster/Shipp continued page 48 side Cloudster does appear sailplane Rather has lines 2-place Formula racer such animal made Perhaps reason test pilot Ray Cote owner pilot famous Shoestring racer comfortable Cloudster ever got involved soaring craft being built, thoroughly enjoys work test pilot often flying longer required just sheer fun Viewing craft underneath flies overhead reveals long tapered wing takes clean lines efficient sailplane type design landing gear received much consideration Most European motor gliders have single re tractable wheel fuselage sup porting outrigger wheels dangling wings requires pilot learn new ground handling techniques Ryan happy about Also taxiing low wing tips must carefully watched prevent hitting obstructions such boundary lights Ryson engi neers considered types landing gearssingle wheel bicycle arrangeAugust 1977 93 PROP DRIVE UNITi THIS SMOOTH RUNNING BELT DRIVEN UNIT OPENS UP WHOLE NEW DIMENSION IN 2 SCALE SPORT AND SCALE MODELS Now can build big have scale size working prop too Designed accept 60 size engine t unit will easily power airplanes weighing 20 lbs Now big old-timers extra large cowls arent impos sible anymore MAKES YOUR BIG AIRPLANE LOOK AND SOUND MORE REALISTIC @2022 AND 24 WOOD PROPS ARE AVAILABLE AT YOUR DEALER OR DIRECTLY FROM GRISH BROS OSLOW POWERFUL FLIGHT IS ACHIEVED WITH THIS UNIT MAKING THOSE OLD TIME AIRCRAFT EXPECIALLY REALISTIC 0 RPMS RANGING FROM 600 TO 5000 DEPENDING ON ENGINE AND PROP COMB 0 THIS UNIT COMES COMPLETELY ASSEMBLED READY FOR ENGINE INSTALLATION CAT NO 210 unit being used Dave Grayu u eruuoaro sport plane 0 S Max Goidhead engine 22-9 prop $10000 DU-BRO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA Dieselize Cox Engine No Glow plugs Power No Battery & Leads _____ economy Less noise Easily throttled Send SASE -literature Dealer inquires invited Conversion seconda No tools required Available 020 0491051 INTRODUCTORY PRICE $995 Includes uel Ask dealer add $150 p&h To order direct Conn Res add ST Davis Diesel Development Inc BOX 141 DEPT E MILFORD CONN 203 877-167006460 IGH Send $100 1977 illustrated cata log complete line Dealers inquiry invited Andrews Aircraft Model Co Inc US Rte 1 & North St Topsfield MA 01983 8878541 ment tricycle gear two-wheel tajidragger type advantages disadvantages carefully weighed twowheel tajldragger type selected Re traction main wheels found practically no advantage creased weight retraction mecha nism required larger wing resulting mere three miles-per-hour increase top speed Therefore main wheels fixed well streamlined tail wheel enclosed streamlined housing steer able may swiveled through 3600 ground Cloudster handles like other tajldragger strong gusty crosswinds Construction ST-100 conven tional metal entirely flush riveted basic alloy used aluminum 2024-T4 other aluminum alloys used extruded spar caps fittings miscel laneous components wing utilizes new Wortman FX-67K-170/17 airfoil has single spar located 40% chord point maximum thickness airfoil 57-8 span wing may folded storage trailering cutting width craft mere eight feet removing two shear pins wing may pulled outward telescopic tube about six inches rotated leading edge down folded back alongside fuselage outboard panel tips may supported cradle swivel joint center panel supports board part wing major innovative features improves performance craft aileron-flap interconnection during certain settings flaps electrical ly actuated flaps may operated through 840 up position ~l2o full down position 720 As flaps raised full-down position operate independently ailerons until reach 80 position lost motion device engages neutral point ailerons ailerons operate conjunction flaps point up full up flap position l20 Flight tests far have indicated crease cruising speed about 15 mph flaps full up position Cloudster does use spoilers flaps serve powerful airbrakes glide dive control fuselage semi-monocoque con struction sheet-metal frames bulkheads extruded aluminum string ers center panel wing built integral fuselage leadingedge torque box adjacent fuselage both sides forms two fuel tanks large removable panel rear right side fuselage permits access controls tail-wheel shock absorber Also provision attaching tow tripod tail Cloudster self powered glider may used tow other gliders instrument panel provided forward occupant easily visible rear seat seats designed accommodate parachutes cockpit ventilated heated onepiece canopy hinged right side has emergency release spacious interior carefully contour rounded no sharp edges Dual controls provided stick rudder brakes flaps propeller pitch throt tle vertical fin welded directly fuselage tail cone has sheet metal spar 45% chord rudder hinged fin three points hori zontal stabilizer consists spar six sheet-metal ribs intermediate foam ribs attached top vertical fin two bolts spar bolt leading edge pitot tube Braunschweig tube incorporated stainless-steel boom extending forward stabilizer leading edge center line airplane tips eleva tors removable reduce width craft transportation tached elevator piano hinges top bottom surfaces fiberglass fairing attached lower skin elevator slides inside vertical fin eliminate aerodynamic base drag intersection Bolted leading edge wing center section outboard fuel tanks main gear oleo-pneumatic shock absorbers designed fabri cated Ryson Aviation Corp wheels brakes Cleveland whole gear enclosed carefully streamlined fiberglass tail-gear shock absorber made solid rubber dough nuts separated aluminum sheet plates Power provided Continental 0200 engine 100 hp driving Hoffmann two-blade three-position metal propeller Propeller pitch control manual through handle right side cockpit forward position handle puts prop low pitch takeoff climb mid-position cruise full aft feathers propeller soaring flight propeller spring-loaded lowpitch position two-piece cowl propeller spinner made fiberglass Two large rectangular cut-outs pro vided aft section cowl cool ing air outlets Flexible aluminum cowl flaps attached can set position between full open full closed According Ryan ST part ST 100 has meaning 5 soaring power T touring power aircraft presently undergo ing flight test program performance figures being compiled date Cloudster has gone 24000 feet still climbing 250 fpm has over 100 hours air tachometer reads 45 hours test flights com pleted plans production Cloudster will made 94 Model Aviation Lightweight Permagloss ** Weighs Only zPerSqFt Thats light typical plane requires 15 square feet covering Permagloss would add 5 ounces Considering plane engine fuel prop controls etc would weigh about 60 ounces covering weight really isnt important Especially since iron-ons weigh practically same Thats fact less 1/10th ounce difference per square foot between So choose covering like hopefully Permagloss Because Permagloss iron-on covering made out 100% polyester fibres es have permanent shrink memory No sags no wrinkles also iron-on scuffproof Try Permagloss erence will obvious red white blue yellow orange olive drab aluminum 2 dazzling dayglow colors 5 x 36 goofproof trim sheets too CQVERITE 2779 Philmont Ave Huntingdon Valley Pa T Claude Ryan has finally realized ambition have some fun air plane Nearing 80 years age keeps younger people around him constantly run Cloudster out field sure attract curious aviation people Ryans almost boyish enthusiasm new product notice ably infectious chance gets Ray Cote has run flight test T Claude Ryan climbs rear seat can see him smiling thoroughly enjoying new airplane ACKNOWLEDGEMENTS Data Airplane T Claude Ryan Jerome Ryan Ladisalo Pazmany Bob Fro nius Ray Cole Adice Encouragement Drawing Bill Hannan Bob Peck 26th Model Plane Show Eiben Weimer continued page 51 own age group usually no two-year spread First through sixth graders compete three events Fly ing Non-flying Plastic models Sev enth through 12th graders compete six categories Free Flight Control Line Plastic Non-flying Powered Scale Radio Control event offers three trophy awards plus Honorable Mention awards unusual effort very common among kids also proud separate cate gory exceptional child event reward efforts handi capped youngsters heartwarming portions award cere mony involvement show close phone call hospital school system Finally also make kids work show Club displays security registration areas utilize energy wish adults some youth Open division NMPS covers adults over high school age partici pate nine RC events nine CL events ten FF events eight Plastic events Non-flying static models event six additional Ace categories No aircraft has ever turned away show Ace category special interest Former NMPS first-place-winning air craft automatically placed Ace category model competes against other first-place aircraft wins division model eligible display system encourages building new aircraft top-notch contest ants eliminated repeated wins model discourages other entries Open entrant also eligible seven special awards such Best Finish final note rules NMPS al lows contestant enter up six models per event However contestant can win trophy per event large event categories have evolved over years careful consideration contestants epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction instillation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass lavup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Paintinq Pointers brochure Write word glue request IEEiJ fl Division Pettit Paint Co Inc 20 Pine Street Rockaway NJ 07866 foremost complete program worth effort can lift contest professional level Professionalism also means concentra tion security judging NMPS always employs use heavy-duty stan chions roping secure models curious hands Grab biggest modeler around usually indoor flier locate roping arm length models addition completely manned exhibit area must NMPS least 50 properly identified individu als hand times three days Also although Mall closed night club officials maintained all-night security during locked hours judging took place Model registration runs Friday Sat urday closing Saturday evening Judging begins after somewhat quiet dinner extends well wee hours Although does require extra effort judges can ac complish enormous task rating 538 models interference crowd contestants Sunday spent relative relaxation contest officials able discuss public models display models tagged identification number cannot re leased until contestant presents matching claim check Aircraft August1977 95 Why3