THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65
Edition: Model Aviation - 1987/02
Page Numbers: 56, 57, 58, 59, 60, 163, 164, 165
THIS STORY RELATES results chasing down early hobby RC flights well documented appears predate similar event USA may candidate first RC model flight world may earlier flights Im aware pekaps story will help pull out open RC History series Model via tion deliberately confined USA because personally involved gathered wealth historical material over early years Thus review RC activities other countries de layed until now well known inventions spring existence over world almost simultaneously necessary ingred ients available case ventions radio model tech niques enormity researching countrys RC history formidable task spite potential difficulties thought quest would interesting several years ago happened glancing through 1938 Model Air plane News read report Frank Zaic about visit Europe 1937 got started story2 report An American View German Model Aviation des cribed impressions German na tional meet Reichswettbewerb Borken bergen Westfalen August 1937 invited guest after attending Wake field event Europe earlier year Although report covered rubber- gas-powered Free Flight events sentence caught attention Special events brought out gas autogyro failed fly steam-turbine-powered model radio control also failed fly meet month after 1937 AMA Nats six RC entries USA wondered earlier RC events Germany Worlds time another distantly remo neiti having know other T reason placing tion mark EWalt Good Hans Justus M might have successful turned book received Werner Groth German Aero Club visit Germany 1 982 v history German model flying 25-year period 1951 1 covered Nats n quarter-century entries eJ Sure enough attended covere other caught eye w Gliders mid-1936 ayear earl first US RC Nats Right away queried longtim Bremen Hans Justus Meier met first ClAM meeting Europe 1958 ClAM FAIs C International Aero Modeling become well acquainted during years ClAM maintained contact over years active leader German model activities early postwar years founding title 56 Model Aviation tha. ventor same idea about same Lippitsch RC Glider model being launched atthe Wasserkuppe Germanyon June 11936 Lippitsch model won first place prize $8000 equivalent todays US dollars fly 3 place ics out nal SOwere ne 140000 aria operating o e time set Lional ham radio organization Funktechnische Verband radio technical group similar US Amateur lay League also fell prey restrictive regulations Thus th on wireless sets amateurs d illegal Funk technisc forced disband4 ant protect Hit lers ne ished government pre ventin estine communications prove fatal mistake Germany theming radar war contrast ere able enlist help large er skilled experienced oper ors chosen great reservoir radio hams man radar stations thereby helping England win Baffle Britain Germans spoiled own chance developing source radio experts hasty fateful silencing hams 1933 three years later before Reichs ister Luftfahrt aviation Hermarin ded permit experiments s-controlled model aircraft rsmall number licenses ion RC sets allotted 0f 18 Regional Airsport Groups Nonmembers National Socialist Fly ingkorps NSFK some indi vidual members NSFK eligible apply license issued through official regional groups manner reliable persons could obtain license legally regional groups passed licenses persons carefully screened officials concerned Two frequencies made available tll Uj ippitsch glider happy Dresden crew after winning first place L-R Kiose Menzel Egon Sykora Alfred Lippitach three contest entries expected licensed operators 316 2455 MHz Transmitter output limited five watts Use transmitters restric ted control model aircraft use transmitting signals communi cation purposes expressly excluded positively prohibited Illegal use severely punished iii hi XflT Pii hr rit bcn ijtc tcn 5&m/r//7de/r /7/7f 77/7 /7 // / 7 7 /7 / 7/ / 2Ibb 19ereucrme4& nimu 4m effiimobeU situation 1936 NSFK issued set rules RC model aircraft com petition Germany spring 1936 announced first time ever national meet RC Gliders would held Wasserkuppe slope site near Fulda just east Frankfurt close 7 Sc//erie ZLI ef/il/ZCPIAY DiM /7 /7 -Ba#ere / /7 7 77 / / / 7/ / / Sc//erie Rudder actuatorsystem Rubberband pulls left rudderarm Fine wire goesto right rudder arm Rudder shown rightturn position TX off TX wire heated elongates rubberband can pull rudder left turn position February 1987 57 members Modellflugkommission model plane committee German Club among others Richard hn14 Peterson late ier vice-president 1960 presi ived coveted valuable deling over lbt 2L C~ rtkfliI brnltn present border East Germany have visited famous site several times since 1965 found very active both fullscale RC Gliders As aside comment can recommend visit Wasserkuppe RC Glider flier will high point European vacation trip can stay site overnight cozy hotel called Peterchens Mondfahrt literally Little Peters Moon Ship has ex cellent restaurant Also rides two-place /powered gliders available affording overview beautiful Rhoen Valley glider slopes have faces wind direction Now back 1936 Especially attractive competitors event unusually large cash prize 1500 marks almost five months salary young graduate engineer Today equiv alent dollars old 1 SOOM would over $10000not bad contest entries Sunday May 31 1936 finally arrived three entries RC Glider competition rudder designs entries anticipated view licensing difficulty perhaps small num ber should have expected under stand least person did enter because license application turned down three entries 1 Alfred Lippitsch well-known modeler Dresden three-man team Egon Sykora elec trical engineering student two help ersKlose Menzel also well-known model fliers5 2 Helmut Sinn Gop pingen 3 Merkner-Rieger Walter shausen following descriptions taken 1936 issues Modeliflug magazine permission German pub lishers6 should mentioned models flown prior meet Helmut Sinns model rudder set left turn transmitter offthen small electric actuator would move rudder right Unfortunately although receiver actuator worked properly no official flights made Sians model because transmitter failed function Merkner-Rieger model used elec tric motor moved rudder sequence L-N-R-N-L etc similar four-spoke escapement Difficulties both receiver transmitter resulted no official flights him left Lippitsch/Sykora entry7 Lippitsch/Sykora rugged Lippitsch model employed clever lightweight rudder actuator based physical prop erty fine wire heated electrical current passing through will stretch become longer As shown diagram wire attached right 58 Model Aviation airborne RC components Lippitach model weighed total 27 pounds Top L R Power switch receiver chassis Bottom 2V storage cell 1 OOV voltage converter Experimental two-tube receiver three receivers built Sykora Lippitsch rudder horn rubberband left horn wire cold short held rudder right turn heated wire lengthened rub berband pulled rudder left turn movement rudder trailing edge 8mm Q/16 later demonstrated turning radius 300 ft flight Before proceeding description electronics word about radio license Egon Sykora electrical engineering student Alfred Lippitsch mod eler sought assistance 1935 RC team applied special RC license November 5 1935 received February 1 1936 time Sykora started serious construction transmitters receivers next three months built two transmitters three receivers before satisfied con ducted first successful radio ground test May 1 1936 wonders time schoolwork during period Receiver first receiver four tubes functionally satisfactory much too large heavy flight modified heterodyne receiver four tubes down two using reflex prin ciple allowed various signals returned through tubes three times difficult design accomplished size weight reduction needed vacuum tube circuits early days required three different voltages 2V filaments 9V grid 100V plate develop lightweight power supply solution have seen other RC plane now used two small two-volt lead-acid storage batteries filaments heating rudder wire homemade voltage converter/rectifier generated 100 volts plates small 9V dry battery used grid supply since current drain very small About hour operating time avallable before recharging storage batteries together alrborne RC gear con sisting batteries converter receiver relay hot-wire actuator weighed 27 lb considered light weight single-channel control days Radio frequency transmitter operated quartz crystal frequency control Since specific frequency data did appear 1936 articles judged photos receiver RF coil small number turns chosen 2455 MHz rather 316 MHz RC transmitter crystal-controlled single-tube transmitter maximum output two watts designed built Wasserkuppe event However power soon reduced 06 watts improve frequency stability Afraid iver electronics parts Top L-R Rectifier diodes 1 OOV DC 1 OOV transformer core choke coil Middle Match stick RF coil Bottom 9V grid batteryand osclllatorcOil *4 Transmitterleft RC Glideron display museum afterthe Llppltsch victory 1936 February 1987 59 velr$kl&rquCll ~rfU Ii V 1~~ cc 1 Model Magic Epoxy Plus 8 mm 25% lighter Sands & carves like Basswood \ Non sagging gap filling super strength Use anywhere two part epoxy used 6 fI oz $895 retail equal 8 oz regular epoxy Model Magic Filler Balsa Foam & Fiberglasssands exactly like Balsa Super lightweight Superior adhesion Waterproof Nontoxic Use nicks gaps fillets fairings building up large areas8 fI oz $595 retail shrink turn brittle used gasoline diesel fuel offers clarity visual fuel flow Model Magic fuel tubing remains flexible plasticizer migration foul engines exhibits outstanding tear abrasion resistence Tubing tinted red easy identification gasoline & diesel use Available 5ff at$249/pkg lOft $479/pkg 50ff spools $2190 Blue Gb-Fuel Tubing Made finest silicone tubing available Less 1% swelling after 150 hours 15% nitro fuel Available 21/2 5ff packages 50ff spools ed Gas & Diesel Tubing Model Magic Gas & Diesel Fuel Tubing will swell fine products available dealer direct IftN Model Magic Products Inc PO Box 19784 St Paul MN 55119 715/425-1397 view low output range might prove inadequate unjustified found out later Sykora built second transmitter equipped three tubes cornplex circuitry weight slightly greater first unit During pre-contest ground tests Rhoen whole system worked well over range 4000 ft transmitter output 04 watt range trials stopped because distance greater expected flight test model minus RC gear loaded full weight ballast thoroughly test-glided trimmed Free Flight model RC flights Dresden crew did dare fly complete model prior day contest fear hard landing might damage valuable tubes None four men enough money buy new set tubes todays cost would $130 contest day noon June 1 1936 moment truth arrived slightly damp weather did favor electrical gear Furthermore wind con ditions could have better too first trial launch failure speed model being too slow second attempt did fare much better model being unable catch slope lift third launch model flew straight off slope turned left finally right following signals pilot As model tended drop its right wing brought down after flight lasting 45 seconds landed about 90 feet transmitter first indication possible radio control though wing appeared warped After wing de-warped fourth Continued page 163 60 Model Aviation Building repairs snap Model Magic Early RC Germany Rudolf Weber steers 8-ft boat radio control 1928 Rothsee near home Drossen Large model boats able carry heavy equipment flying across airfield really quite fun fly Its quite Helicopter still deserving place anyones hangar youre interested buying Wallis try contacting SAVON Hobbies PO Box 421160 Miami FL 33242 have generously supplied new rotor blades after pranged making too fast touchdown athletic field Until next month Larry Jolly 5501 W Como Santa Ana CA 92703 1 St RC SaiI/Good-Meier Continued page 60 attempt followed again unsuccessful fifth launch provided flight lasted 104 seconds course flight reliable operation system convincingly demonstrated first turn left followed right two complete right circles several small left turn movements between small left turns performed show whether model still within range proper control operation moment distance between transmitter model over 2000 ft model flew region downdraft quickly steered toward home flying straight course landed some 20 yards transmitter first officially-recognized demonstration RC model Sailplane Germanyand perhaps world Al though model made several hard land ings course five flights no parts model RC gear damaged receiver did require retuning hefty cash prizes awarded following way 1st Lippitsch $8000 equivalent 1986 US dollars 2nd Sinn $1300 3rd Merkner-Rieger $700 competitors won valuable experi ence during first successful flights Rhoen expressed sincere hope within reasonably short time would able demonstrate im provements both regards variety control functions flight endurance must comment rate Lippitsch team very high joint abilities devising model radio control geartesting separately joining plane radio five attempts demonstrated radio control clearly right left turns nearly two minutes landed model near starting point indeed true pioneers Recent efforts trace whereabouts pioneers have successful interesting find out Helmut Sinn continued RC automatic flight controls 1938 Wasserkuppe demonstrated Glider gyro direc tional steering variometer pitch con trol Further July 1939 entered contest automatically-steered powered models requiring plane fly goal February 1987 163 worlds starter system worlds integrated system starter parts starts accessories gets off superior start Hi-Tork Dynatron Hi-Tork Starter worlds powerful standard starter0 Hi-Tork features several innova tive safety features including patented hand guard keep hands away propeller starter switch located below handgrip help prevent accidental starts heavy-duty Dynatron Starter delivers one-third maximum power 12 volts closest competitor 47- 69% torque standard 12volt starters greater output Dynatron can used 24 volts Equipped patented safety guard Dynatron backed full two-year warranty against manufacturing defects Both outstanding starters made USA compatible other Sullivan products exemplily dedication high quality technol ogy Youll find Sullivan starters accessories dealer near Get off safe trouble-free start time Sullivan Determined leading independent testing labaratory FVI4fR 7O6VtZ PRODUCTS no fly near overhead eectricpoaer Axes North 1-loves 5 tee bs 5166 mote MD 212240 301 732-3500 1ORE POWEi WITH LESS NOISE four-cycle measurIng up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope 6O information call 203-8771670 between 730 pm 930 pm EST DAVIS DIESEL DEVELOPMENT PO Box 141 Malford CT 06460 LThe leader quiet combustion4 chnology since 1976J return contest held secrecy no visitors admitted Apparently government sponsors looking low-cost tactical mini-reconnaissance ve hicle Unfortunately Sinns model crashed takeoff Herbert Scholls steamturbine-powered plane burned up shortly after burner lighted Scholl developing model RC gear minia ture steam turbines since 1935 Powered RC models Germany several modelers experimenting late 1930s powered RC models report contest held Westfalen 1937 stated no successful flights similar contest Leipzig July 1939 produced same result generally considered early days successful powered RC flight difficult RC Gliders pri marily due engine vibration electrical interference spark-igni tion system compared gentle flight environment Gliders writing appears Germany demonstrated worlds first successful RC Sailplane national competition 1936 assume may other coun tries might challenge statement case powered RC models appears USA may have worlds first AMA National Meet Detroit 1937 Criteria firsts RC order judge first hobby RC planes have listed below some criteria believe reasonable will apply RC first some set criteria needed establish authen ticity event 1 The model demonstrated pub lic preferably recognized national competition specific regulations 2 The results documented writ ing photos two reliable reporters appeared national pub lications 3 The flights recognized countrys national aeronautics organiza tion 4 The RC model demonstrated maneu vers command climbed altitudes above launch height returned landed near transmitter Related non-hobby RC Germany historical sequence similar United States Germans initiated sev eral types non-hobby RC starting late 1 800s course some advantage early information due discoveries 1887 famous Hemrich Hertz proved electrical waves did exist could measured trans mitted received8 1899 Mr Vogler Kamenz Germany Prof Fitzgerald Dublin Ireland simultaneously filed patents remote control vehicle radio remembered Teslas vehicle control patents USA dated 1898 demonstrations RC boats Madison Square Garden same year Again example simultaneous developments different locations Later 1911 student advisor named Wirth Nuremberg put Voglers ideas practice RC boat called Prinz Ludwig demonstrated Nuremberg also Berlin Wannsee boat steering engine controls well small gun fired remotely 1913 Anton Flettner remem bered inventions rudder servo tab Flettner rotor proposed remotely-controlled tank steered toward enemy positions would cut barbed wire barriers before re turning its starting place tank built tested successfully 1915 military lost interest dis covered stray radio signals Eiffel Tower Paris interfered tanks guidance system9 1920s German Navy con verted former battleship Zabringen radio-controlled target ship training gun crews filled cork prevent sinking bombardment practice Rudolf Weber Drossen near Frank fort/Oder began experiments RC boats still student 1928 boat almost 8 ft long propor tional steering rudder 1 64Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Xe6taLe DESIGNED BY BILL WINTER U DAVE NT FLIGHT PERFORMANCE WITH 05 ELECTRIC POWER SELECTED DIE & MACHINE CUT WOOD ROLLED FULL SiZE PLANS STEP-BY-STEP INSTRUCTIONS DIRECT OR REDUCED DRIVE EXCLU SIVE SIMPLE MOTOR MOUNT OLDTIMER/SPORI-3 CHANNEL 58 SPAN 490 SQ IN AREA 41-46 OZ 11-13 OZ WING LOADING DAVE Y CORPORATION SYSTEMS ONE WOOD LANE MALVERN PA 19355 215 644-6772 new time several on-off controls engine other functions demonstrated Rothsee near home during late 1 920s included firing four bullets deck placed projecf nonhobby category10 Weber used term Radio Dynamics describe emerging radio-control tech nology term also title radio control book B F Miessner USA 1916 term no longer used today conjectured Weber may have borrowed words Miessner wonder anyone used term before Miessner Acknowledgements thanks Hans Justus Meier Bremen research translations adviceto wife Joyce typing patienceto brother Bill son Terry proofreading critiquesand Tom Perzentka Flettner reference References 1Gd Walt History RC Flying Model Aviation March April May 1986 2Zaic Frank An American View Model Aviation Model Airplane News April 1938 3Petersen Berthold others 25 Years Mod ellflug im Deutscher Aero Club 1975 4Eichhorn M Neue Bestimmungen uber die Fernsteurung von Flugmodellen Modellflug Vol 2 1937 No 5 p 150 5Alexander Franz Modellfiug magazine Vol 1 1936 No 2 5Note Official permission Modellflug magazine Germany obtained Ver lag ES Mittler & Sohn Munich letter December 3 1985 7Lippitsch Alfred Modellflug Vol 1 1936 No 3 ALubke Technik und Mensch im Jahre 2000 Verlag Kosel Munich 1927 9Flettner Anton Story Rotor pubi FO Willhofft New York NY original book Mein Weg zum Rotor publ Koehier 1926 Amelang Leipzig 1926 15Weber Rudolf Strahien lenken em Boot Das Neue Universum Vol 53 1933 CL Aerobatics/Fancher Continued page 62 head gasket found RC version Otherwise two engines identical 81 ounces muffler 4OFP lightest engine come along years Its comparable old McCoy 35 K&B Tor pedo 35 Fifties realize comparison dates OS quality among best industry durability should quite good lapped piston means no ring gaps seals worry about FP Schnuerle-ported engine means easy starting power other porting configurations Unfortunately past also meant nearly uncontrollable tendency surgeespecially outside maneuvers FP has extremely mild port timing aod does have tendency break just dont want Now what to make engine run well February 1 987 1 65