FlyWorm

ECol John de Vries USAF ret LIKE SO MUCH else aviation FlyWorm began dream Surely improbable-looking aeronautical designs ever escape drawing board singular aircraft invention Californian Paul Maiwurm Maiwurm built fantasy ship 1928 alive see Jules Verne would have loved watching flight humming bird San Diego garden first set Maiwurms imagination work tiny avian feathers flashing fire darted among shrubbery could drop hover flowers keeping up rapid beating 60-70 beats per second its wings Fasci nated Maiwurm acquired movie camera document jewellike little birds pecu liar flight characteristics kestrel shares similar capabilities Soon fasci nation grew near-obsession nature gave hummingbirds wings both lift propulsion Maiwurm mused couldnt man apply principle mechanical craft design air plane combined lift propulsion single unit daring leap invention Maiwurm proposed add ing rocket propulsion newfangled crafta concept far ahead aeronauti cal state art 1928 Unlike other aircraft designers Maiwurm passed over wing-flapping ornithopters struck heart problem thought hollow rotating wing internal external spiral propulsion blades would provide desired lift propulsion As have designers before him Maiwurm proved principle help models first simple tube spiral blades affixed weight stabilize its fall Dropping tube Cabrillo Bridge Sprecides Building San Diego Maiwurm observed its speed descent slackened gained rotational speed Apparently May 1990 71 PROPULSIO~SROCIET MOTOR US.73467 JAN 4934 789 59 JAN ZOI93 PATENTS7O2 N 27931 FOREIGN 6 OTHER PATENTS PENDING IA look back improbable attempt come up mousetrap heady days aviation young better Top Artists conception New Cyclonic Rocket Aircraft Maiwurm brochure inkblot unfortunately original Maiwurms dissertation fly revolu tionary aircraft appears text Above Paul Maiwurm seated FlyWorm prototype rotating tubular wing acted like parachute much ducks wings lands Maiwurms next experimental step creating rubber-powered model built another tube external helix power simple device made two rubberbands thread spool rubberbands tightly wound spool mounted near its middle As rub ber unwound spool would turn other wider rubberband formed belt enclosed spooi tube causing tube rotate Early tests revealed os cillating flight pattern Maiwurms first thought knots propulsion rubberband causing uneven rotation tube continued testing pointed pitch spiral blade culprit As originally designed spiral blade pitch constant over length tube progressively increasing heli cal blade pitch along its length Maiwurm able eliminate oscillation eighth rubber-powered model attained al titude 60 70 ft flew 400 ft point launch After great deal experimentation Maiwurm determined apparent opti mal depth spiral blades oneeighth diameter tube Later exper iments led him install another helix inside tube additional propulsive effect inner outer spiral blades met front rear tube Maiwurm also invented cylindrical box kite equipped stabilizing fins kite constructed chrome-molybdenum tubing aircraft fabric 1500 ft heavy fishing line capable towing small coaster wagon loaded three children After applying receiving patents hollow helical-bladed tube Mai wurm ready try full-scale applica tion principle formed FIyW orm Corporation America sold stock built first apparently FlyWorm San Diego 1929 Constructed welded steel tubing ungainly craft conventional wing structure suspended large hollow propulsion tube fitted both external internal spiral blades Ro tational power provided what ap pears LeRhone rotary engine pos sibly Super Rhone fixed-radial ver sion wartime engine system pulley wheels belts drove tube through two circular extensions welded Like rest craft tube fabric covered Because propulsion tube FlyWorms source lift Maiwurm doubts about controllability aircraft hedged bets designing airfoil-shaped fuselage supplement airfoil upper wing Three rud ders employed two suspended lower surface upper wing third centered lower fuselage Though photographs FlyWorm unclear appears split eleva 72 Model Aviation Paul Maiwurms drawings FlyWorm experiments Diagram No 1 shows earliest model dropped Cabrillo Bridge San Diego Diagram No 2 rubber-powered flying model tubular wing Diagram No 3 notes model oscil lated before increased pitch helical blade along its length Diagrams 4 5 re veal experiment conical tubeit offered no particular advantage Diagram No 6 shows cylindrical box kite Maiwurm developed pulling three children coaster wagon FlyWorm hi its completed configuration Rotational power tubular wing pro vided LeRhone rotary engine possibly Super Rhone fixed-radial version wartime engine system pulley wheels belts drove tube through two circular ex tensions welded Like rest craft tube fabric covered FlyWorm prototype ever built blazing along 7-8 mph Mission Beach CA its first test run 3000 spectators nd nine newsreel companies hand event tube rotating 180 rpm 160 rpm FlyWorm taxied 6Y2 mph craft weighed 1625 lb photo dated June 23 1929 autographed Maiwurm Left The uncovered framework FlyWorm prototype craft built almost entirely welded steel tubing Right Close-up right side FlyWorm Note apparent airfoil shape juselage Dual fuel tanks welded either side tubular wing pilot sits up front left side fuselage individual inspecting machine unidentified though its probably Maiwurm tor aft end quasi fuselage cockpit installed fuse lage left center steering wheel ap parent photographs landing gear consisted two spoked wheels ward another two much small er located aft corners rec tangular planform fuselage crowd 3000 gath ered FlyWorms first ground test Mission Beach CA probably wouldnt have surprised see Captain Nemo Phil ias Fogg step out curious-looking craft tubular wing rotating 180 rpm Maiwurms machine taxied stun ning seven eight miles per hour Nine newsreel companies documented event newspapers magazines across country heralded new propulsion sys tem no evidence however original FlyWorm did anything other taxi Whatever merits new propul sion system may have ran up against harsh realities Great De pression FlyWorm Corporation America stock selling just eighty cents share Paul Maiwurm needed additional cap ital construct flyable prototype early 1931 left everyday business run ning corporation hands man Werth set off money capital EastNew York City Maiwurm sent report progress stockholders documenting search capital Jealously guarding position Mr FlyWorm Maiwurm wanted $90000 build flying craft New York finan ciers expected gain control com pany proposal rejected However did offer so-called transportation franchise something gained certain amount credence transport franchise true depar ture reality Maiwurm believed FlyWorm would ultimately replace both railroads ships prime carrier people materials suspected fact some New York money men really agents railroads inter ested transport franchise means suppressing FlyWorm As conditions backing Maiwurms company New York finan ciers stipulated experimental FlyWorm built East Maiwurm course would have preferred keep pro duction San Diego Before New York deal fell through allied himself Mr William Grossman law firm House Grossman & Vorhaus Phila delphia Again transportation franchise inducement Mr Grossman money man Setting figure Continued page 74 Left Rear view covered FlyWorm Note complex system wheels belts pulleys required drive tubular wing Also note tail wheels main fin/rudder quasi fuselage twin rudders under main wing Right Front view FlyWorm Paul Maiwurm standing left other individual unidentified picture shows internal external helicals met front rear tubular wing Note rudder connecting rods steering wheel positioned left side fuselage May 1990 73 NORTH AMERICAN YAT-28-E 1 SCALE 66 SPAN 60 LENGTH 7Ato8A LBSENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware FactoryApproved3Views~ Ply Capped Cowl WingJ Saddle & Surfaces JigBuiltFlyingSurfaces Scale Spinner & Prop BladesV W1 order call write 7j GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 9531188 PERESTROIK PACKGE Celebrate fall Iron Curtain being first build fly classic Russian Warbirdsl Both kits feature precision-formed fiberglass fuselages light-weight foam wings 4II See nearest authorized F&E dealer write call FREE iSSO catalog 1836 Stout Drive inster PA 18974 675-9882 $259 951 $15995 Shipping $250000 goal offered exclu sive transportation franchise rights pur chase Before two men finalized ne gotiations however Mr Grossman sud denly died giving talk fraternal order Though knew no take Gross mans place 25th June 1931 Maiwurm still optimistic about financ ing dream turned stockhold ers San Diego additional funds apparently didnt share enthusiasm Maiwurm never found capital build another FlyWorm Before fading mists history Maiwurm last great inspiration New Cyclonic Rocket Aircraft tandem two-place aircraft common constructionsteel tubing fabric coveringbut entirely con ventional control lifting surfaces fol lowing taken verbatim Maiwurms advertising brochure Description Cyclonic-Rocket Air craft illustration front page shows exactly what new FLIVER PLANE will look like completed twelve feet long five feet four inches high trifle wider average auto garage Anyone can learn pilot craft less hours time its operation simpler auto no skill pilot qualifications necessary ac complished through simplifying unify ing control system first air craft has neither conventional wing propeller nor motor usual ailerons stabilizers elevators rudder completely eliminated TAKING OFF pilot starts four rocket motors giving propulsion tube quick whirl easily done safer cranking automobile no backfiring can take place Next seats him self turns elevation wheel rightwhich like standard automobile steering mechanismand thereby places four rotating tubular wings angle 30 45 degrees ready now fly holds left foot brake right accelerator grad ually pushing down uniformly increases revolutions four rocket-turbine mo tors synchronized speed remains identical craft begins lift takes off standing start angular path until desired altitude reached FLYING LEVEL After reaching desired altitude elevation wheel turned left places four pro pulsion tubes horizontal position until altimeter shows craft no longer climbing BANKING AND TURNING accomplished two throttle levers lo cated either side cockpit make right turn right-hand lever pulled back thereby throttling both motors right side higher speed motors 74 Model Aviation PO BOX 26 NORWOOD NJ 07648 914-429-3484 Introductory Price List Price $155 MiG-21 Fishbed Long workhorse Soviet-bloc Air Forces worldwide Designed 60 power Frontmounted engine end prop Clear plastic canopy $16g95 plu shipping left side pull craft right-hand turn fly straight again simply release throttle lever automatically goes its normal position thereby synchroniz ing four motors straight course banking effect automatic less ening speed right left side re duces lift proper banking angle re sults LANDINGS order land eleva tion wheel again turned right points propulsion tubes upward Next pressure foot accelerator released until revolutions motor reduced point weight machine causes descend de sired rate nearing ground slight acceleration generates lift cushions landing craft bringing gently earth can landed backyard space about three times its own length STABILITY entire craft inher ently stable weight fuselage keeps always longitudinally laterally balanced Once right altitude can flown hands off its design provides safety makes dreaded tailspin impos sible MOTOR EQUIPMENT new craft combines three principles lift propul sion power unit motor has six rocket-shaped explosion chambers independent others simplified igni tion system eliminates wiring cam-operated intake valves explosions directed against curved turbine plates i dentical plates steam turbines mounted between inner outer tubular walls rotor wing way explosive impulses converted direct rotary motion motor housing also serves support tubular wing turns easily roller ball bearings located between rocket cham bers system eliminates pistons crank shaft connecting rods reduces weight two-thirds eliminates threefourths usual parts quantity pro duction can cheaply built cost four rocket motors would equal cost standard piston motor SAFETY Due simplified construc tion motor failure less likely occur two rocket motors should fail remaining motors will keep other ro tating because wind striking against spiral propulsion fins thereby keep craft air motors fail ing craft would land safely its de scent onrushing air current would keep rotating wings spinning check fall parachutelike fashion bringing craft safely earth Safety assured means four rotor wings four propulsion devices four motors HOW IT LIFTS Lift produced whirling cyclonelike air currents side outside rotating tubular wing means two scooplike propellers built nose wing air forced inside whirls high speed Continued page 187 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion and* Computer Designed Reserve Grand Champion Ultralight Part 103 Ultralight 1989 Sun-N-Fun Fly-In* Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 uner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/0 failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EMGIIIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division Research corporation Priceo subiect change withoot notice May 1990 75 Special Fast Turnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification SpectrumI CalIbrated Test Analyzers1 Instruments UPS US Mail Federal Express Used Mastercard Visa Accepted Large Inventory RIC Parts Crystals /. . Send Large Self Addressed Envelope Brochures 3 Axis Control Easy Construction Ditectftom PATTERN TEE 320-ET uie Cteek Ct San Jo Ca 95125 Te14Ci298-Q3II Ft4Q829i-53S 1950s also Dmeco Sportwing moat Americans Building large Stuntwagon appealed time around dered set plans Fran Ptaszkiewicz began construction powered updated Stuntwagon Su perTigre 46 incorporated wing tip weight compartment adjustable lead-out guide trimming As OTS rules prohibit drop-off landing gear t added sheet aluminum gear Wagon presumably deBolt used later versions Modern glues hardware made better job could have managed back also used muffler pretty much unknown former days airplane finished off butyrate dope Im enjoying refly ing good old days working Stuntwagon thinking about vintage days Control Line Stunt par ticularly deBolt aircraft carried corres pondence Hal now living Florida re lated some history Dmeco Control Line projects Fran Ptaszkiewicz added information few nice letters Putting article together interesting fun help Mike Keville PAMPA newsletter editor OTS enthusiast able round up photos deBolt CL aircraft modelers across country After Hal Dmeco him shifted Control Line Radio Control activity came equally renowned top designer competitor arena Though better remem bered today achievements RC Hal will never lose standing influen tial designers competitors halcyon days Control Line modeling classic CL designs will flying long time come FlyWorm/de Vries Continued page 75 along inner tube walls ejected opening rear end outer spiral propulsion fins keep airstream whirling around outer tube surface sist propelling craft superpropul sion combination spiraling air cur rents both outside tubular wing angle tube placed line flight sustain craft atr COST elimination parts smaller size combination propul sion lift power principles unit structurally adapting itself mass pro duction should bring sales price aircraft within reach great majority people question mod ern factory equipment quantity produc tion price should compare cheapest automobile today Wouldnt have wonderful actually worked author wishes thank Jack Bol Denver CO sharing discovery FlyWorm certainly invention worth uncovering FF Duration/Linstrum Continued page 77 three grams perhaps fuselage must gram sturdier sustain torque whole drive system mere four grams Compare Telco full tank 15 grams MRC Electric 30 grams obvious model lifting heavy power source will climb less thus have less duration heavier motor less efficient ob taining time aloft will get weight effi ciency system dividing total thrust im pulse weight drive unit comes surprise rubber small models still king twice efficiency electricand mercymy favored CO2 drive limps behind last place beauty rubber motors lies fact torque weight duration can modified will suit individual application feel model should climb faster add few strands dont want increase weight shorten loops Infinite possiblilites exist within wide limits Efficiency 87% Electric efficiency 40% goes up Sanyo cells lighter regular Ni Cds Models limited size make mo tor CO2 efficiency 30% Telco compar atively smallthe thrust developed hardly enough keep 25-gram model level flight thrust up notch model will climb dead air flights including glide about minute picture changes rapidly larger CO2 motors brown MJ-70 displaces 70cc will keep 52-gram model aloft three minutes dead air Brown t40 twin two tanks beats rubber performance largest mo tor will run 6-in prop specified AMA rules Czech Modela Cox 020 CO2 Da vis conversion require much larger props can used AMA competition have slightly edited Fritzs remarks HANGAR-7 RIG & C/L MODELS Proffesional Neans Quality Results Cazaorsp1et IKvit PreCut AAA Raisa & Ply PrePonred Landing Gear Spruce & Maple Wood PuliSize Roiled Plans tsstructmons Wheels Controls Etc Inciuded 13 Plin~s Pls-a Kvit shove except 5CUI parts handy temptate sheet provided C PThnas Os-sly Fulisize rolled pians tesplate sheet instructions shipped rirot class sail Free Catalog $59 C $11 Rid CORSAIR 25 Distinctive Gull Wing Pavoritet SemiScale Wing Spant 4k Wing Arear 410 sq Sn Lengtht 341/2 LoadnE 5 Sq Pt Weigh 31/211 Onginet 25 o Sad 4Chasoe S A 7 C $7 tR/C HORNET 574 Spoda Wing Spant 27 WanSq25 Lnadingt il Sz/Sqna ueefl gee $ 13 $9 N/C r Wing Spon iI Wins areat 375 Sq In. Length 351/2 Weightt $39 13 $25 C $9 C/LI DROPIADER 4G nugnip Proflie Fuselage i guiltI Spant 55i/i Areat 540 Sq In. Enginet 40 $24 13 $15 C $7 39 13 S25 C 9 aprenaive Sight Profile Fuselage & RuiltIp Sheeted Wing Wing Spant 52 Areat 435 Sq Sn Enginet 35 Stunt ai~Y C/LI5 Lov Prof ile Fuselage & Soiid Raisa 05055 osog 293/5 Area 305 Sq Engine iS Cu C/LI tilfIE 5255 iS $ 2 2 Sport Piper/Tramoeoi guiltUp Sheeted Wings & Fuseloge Wiog Spant $ reat 200 Sq $7 Dealer Inquiries Invited ORDER YOURS TODAY Please add $4 shipping & handling Send check ar tooney order VISA & MC accepted Ojur street address kits pisese credit cards W STANGEL ENTERPRISES PO BOX 336 Pit t4i4 5484172 WAUKESHA WISCONSiN S31g70338 MEMBER EAA AMA May1990 187 Ideal 4-ycle F3A & AMA fl1ng Basic Ki Pre-tab -Beetle TMSuperStar 6 Basic -built Kit 1S2951 NEW Narukes Silent st 2 4-cycle

ECol John de Vries USAF ret LIKE SO MUCH else aviation FlyWorm began dream Surely improbable-looking aeronautical designs ever escape drawing board singular aircraft invention Californian Paul Maiwurm Maiwurm built fantasy ship 1928 alive see Jules Verne would have loved watching flight humming bird San Diego garden first set Maiwurms imagination work tiny avian feathers flashing fire darted among shrubbery could drop hover flowers keeping up rapid beating 60-70 beats per second its wings Fasci nated Maiwurm acquired movie camera document jewellike little birds pecu liar flight characteristics kestrel shares similar capabilities Soon fasci nation grew near-obsession nature gave hummingbirds wings both lift propulsion Maiwurm mused couldnt man apply principle mechanical craft design air plane combined lift propulsion single unit daring leap invention Maiwurm proposed add ing rocket propulsion newfangled crafta concept far ahead aeronauti cal state art 1928 Unlike other aircraft designers Maiwurm passed over wing-flapping ornithopters struck heart problem thought hollow rotating wing internal external spiral propulsion blades would provide desired lift propulsion As have designers before him Maiwurm proved principle help models first simple tube spiral blades affixed weight stabilize its fall Dropping tube Cabrillo Bridge Sprecides Building San Diego Maiwurm observed its speed descent slackened gained rotational speed Apparently May 1990 71 PROPULSIO~SROCIET MOTOR US.73467 JAN 4934 789 59 JAN ZOI93 PATENTS7O2 N 27931 FOREIGN 6 OTHER PATENTS PENDING IA look back improbable attempt come up mousetrap heady days aviation young better Top Artists conception New Cyclonic Rocket Aircraft Maiwurm brochure inkblot unfortunately original Maiwurms dissertation fly revolu tionary aircraft appears text Above Paul Maiwurm seated FlyWorm prototype rotating tubular wing acted like parachute much ducks wings lands Maiwurms next experimental step creating rubber-powered model built another tube external helix power simple device made two rubberbands thread spool rubberbands tightly wound spool mounted near its middle As rub ber unwound spool would turn other wider rubberband formed belt enclosed spooi tube causing tube rotate Early tests revealed os cillating flight pattern Maiwurms first thought knots propulsion rubberband causing uneven rotation tube continued testing pointed pitch spiral blade culprit As originally designed spiral blade pitch constant over length tube progressively increasing heli cal blade pitch along its length Maiwurm able eliminate oscillation eighth rubber-powered model attained al titude 60 70 ft flew 400 ft point launch After great deal experimentation Maiwurm determined apparent opti mal depth spiral blades oneeighth diameter tube Later exper iments led him install another helix inside tube additional propulsive effect inner outer spiral blades met front rear tube Maiwurm also invented cylindrical box kite equipped stabilizing fins kite constructed chrome-molybdenum tubing aircraft fabric 1500 ft heavy fishing line capable towing small coaster wagon loaded three children After applying receiving patents hollow helical-bladed tube Mai wurm ready try full-scale applica tion principle formed FIyW orm Corporation America sold stock built first apparently FlyWorm San Diego 1929 Constructed welded steel tubing ungainly craft conventional wing structure suspended large hollow propulsion tube fitted both external internal spiral blades Ro tational power provided what ap pears LeRhone rotary engine pos sibly Super Rhone fixed-radial ver sion wartime engine system pulley wheels belts drove tube through two circular extensions welded Like rest craft tube fabric covered Because propulsion tube FlyWorms source lift Maiwurm doubts about controllability aircraft hedged bets designing airfoil-shaped fuselage supplement airfoil upper wing Three rud ders employed two suspended lower surface upper wing third centered lower fuselage Though photographs FlyWorm unclear appears split eleva 72 Model Aviation Paul Maiwurms drawings FlyWorm experiments Diagram No 1 shows earliest model dropped Cabrillo Bridge San Diego Diagram No 2 rubber-powered flying model tubular wing Diagram No 3 notes model oscil lated before increased pitch helical blade along its length Diagrams 4 5 re veal experiment conical tubeit offered no particular advantage Diagram No 6 shows cylindrical box kite Maiwurm developed pulling three children coaster wagon FlyWorm hi its completed configuration Rotational power tubular wing pro vided LeRhone rotary engine possibly Super Rhone fixed-radial version wartime engine system pulley wheels belts drove tube through two circular ex tensions welded Like rest craft tube fabric covered FlyWorm prototype ever built blazing along 7-8 mph Mission Beach CA its first test run 3000 spectators nd nine newsreel companies hand event tube rotating 180 rpm 160 rpm FlyWorm taxied 6Y2 mph craft weighed 1625 lb photo dated June 23 1929 autographed Maiwurm Left The uncovered framework FlyWorm prototype craft built almost entirely welded steel tubing Right Close-up right side FlyWorm Note apparent airfoil shape juselage Dual fuel tanks welded either side tubular wing pilot sits up front left side fuselage individual inspecting machine unidentified though its probably Maiwurm tor aft end quasi fuselage cockpit installed fuse lage left center steering wheel ap parent photographs landing gear consisted two spoked wheels ward another two much small er located aft corners rec tangular planform fuselage crowd 3000 gath ered FlyWorms first ground test Mission Beach CA probably wouldnt have surprised see Captain Nemo Phil ias Fogg step out curious-looking craft tubular wing rotating 180 rpm Maiwurms machine taxied stun ning seven eight miles per hour Nine newsreel companies documented event newspapers magazines across country heralded new propulsion sys tem no evidence however original FlyWorm did anything other taxi Whatever merits new propul sion system may have ran up against harsh realities Great De pression FlyWorm Corporation America stock selling just eighty cents share Paul Maiwurm needed additional cap ital construct flyable prototype early 1931 left everyday business run ning corporation hands man Werth set off money capital EastNew York City Maiwurm sent report progress stockholders documenting search capital Jealously guarding position Mr FlyWorm Maiwurm wanted $90000 build flying craft New York finan ciers expected gain control com pany proposal rejected However did offer so-called transportation franchise something gained certain amount credence transport franchise true depar ture reality Maiwurm believed FlyWorm would ultimately replace both railroads ships prime carrier people materials suspected fact some New York money men really agents railroads inter ested transport franchise means suppressing FlyWorm As conditions backing Maiwurms company New York finan ciers stipulated experimental FlyWorm built East Maiwurm course would have preferred keep pro duction San Diego Before New York deal fell through allied himself Mr William Grossman law firm House Grossman & Vorhaus Phila delphia Again transportation franchise inducement Mr Grossman money man Setting figure Continued page 74 Left Rear view covered FlyWorm Note complex system wheels belts pulleys required drive tubular wing Also note tail wheels main fin/rudder quasi fuselage twin rudders under main wing Right Front view FlyWorm Paul Maiwurm standing left other individual unidentified picture shows internal external helicals met front rear tubular wing Note rudder connecting rods steering wheel positioned left side fuselage May 1990 73 NORTH AMERICAN YAT-28-E 1 SCALE 66 SPAN 60 LENGTH 7Ato8A LBSENG 60 80 Machine Cut Parts Complete Const Manual Balsa Kit Complete Decals Full Size Plans Complete Hardware FactoryApproved3Views~ Ply Capped Cowl WingJ Saddle & Surfaces JigBuiltFlyingSurfaces Scale Spinner & Prop BladesV W1 order call write 7j GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 9531188 PERESTROIK PACKGE Celebrate fall Iron Curtain being first build fly classic Russian Warbirdsl Both kits feature precision-formed fiberglass fuselages light-weight foam wings 4II See nearest authorized F&E dealer write call FREE iSSO catalog 1836 Stout Drive inster PA 18974 675-9882 $259 951 $15995 Shipping $250000 goal offered exclu sive transportation franchise rights pur chase Before two men finalized ne gotiations however Mr Grossman sud denly died giving talk fraternal order Though knew no take Gross mans place 25th June 1931 Maiwurm still optimistic about financ ing dream turned stockhold ers San Diego additional funds apparently didnt share enthusiasm Maiwurm never found capital build another FlyWorm Before fading mists history Maiwurm last great inspiration New Cyclonic Rocket Aircraft tandem two-place aircraft common constructionsteel tubing fabric coveringbut entirely con ventional control lifting surfaces fol lowing taken verbatim Maiwurms advertising brochure Description Cyclonic-Rocket Air craft illustration front page shows exactly what new FLIVER PLANE will look like completed twelve feet long five feet four inches high trifle wider average auto garage Anyone can learn pilot craft less hours time its operation simpler auto no skill pilot qualifications necessary ac complished through simplifying unify ing control system first air craft has neither conventional wing propeller nor motor usual ailerons stabilizers elevators rudder completely eliminated TAKING OFF pilot starts four rocket motors giving propulsion tube quick whirl easily done safer cranking automobile no backfiring can take place Next seats him self turns elevation wheel rightwhich like standard automobile steering mechanismand thereby places four rotating tubular wings angle 30 45 degrees ready now fly holds left foot brake right accelerator grad ually pushing down uniformly increases revolutions four rocket-turbine mo tors synchronized speed remains identical craft begins lift takes off standing start angular path until desired altitude reached FLYING LEVEL After reaching desired altitude elevation wheel turned left places four pro pulsion tubes horizontal position until altimeter shows craft no longer climbing BANKING AND TURNING accomplished two throttle levers lo cated either side cockpit make right turn right-hand lever pulled back thereby throttling both motors right side higher speed motors 74 Model Aviation PO BOX 26 NORWOOD NJ 07648 914-429-3484 Introductory Price List Price $155 MiG-21 Fishbed Long workhorse Soviet-bloc Air Forces worldwide Designed 60 power Frontmounted engine end prop Clear plastic canopy $16g95 plu shipping left side pull craft right-hand turn fly straight again simply release throttle lever automatically goes its normal position thereby synchroniz ing four motors straight course banking effect automatic less ening speed right left side re duces lift proper banking angle re sults LANDINGS order land eleva tion wheel again turned right points propulsion tubes upward Next pressure foot accelerator released until revolutions motor reduced point weight machine causes descend de sired rate nearing ground slight acceleration generates lift cushions landing craft bringing gently earth can landed backyard space about three times its own length STABILITY entire craft inher ently stable weight fuselage keeps always longitudinally laterally balanced Once right altitude can flown hands off its design provides safety makes dreaded tailspin impos sible MOTOR EQUIPMENT new craft combines three principles lift propul sion power unit motor has six rocket-shaped explosion chambers independent others simplified igni tion system eliminates wiring cam-operated intake valves explosions directed against curved turbine plates i dentical plates steam turbines mounted between inner outer tubular walls rotor wing way explosive impulses converted direct rotary motion motor housing also serves support tubular wing turns easily roller ball bearings located between rocket cham bers system eliminates pistons crank shaft connecting rods reduces weight two-thirds eliminates threefourths usual parts quantity pro duction can cheaply built cost four rocket motors would equal cost standard piston motor SAFETY Due simplified construc tion motor failure less likely occur two rocket motors should fail remaining motors will keep other ro tating because wind striking against spiral propulsion fins thereby keep craft air motors fail ing craft would land safely its de scent onrushing air current would keep rotating wings spinning check fall parachutelike fashion bringing craft safely earth Safety assured means four rotor wings four propulsion devices four motors HOW IT LIFTS Lift produced whirling cyclonelike air currents side outside rotating tubular wing means two scooplike propellers built nose wing air forced inside whirls high speed Continued page 187 Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Ill Fly What Fix AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion and* Computer Designed Reserve Grand Champion Ultralight Part 103 Ultralight 1989 Sun-N-Fun Fly-In* Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 uner later youll see need Fully HALF crashes can traced dead dying receiver batteries New Plane Saver Applied Engineering warns low batteries flight letting safely land before losing control Installs seconds Compact Plane Saver 2 xl x 3/4 unit fits neatly onboard weighs less 1 oz between receiver throttle servo battery capacity falls Plane Saver automatically lowers maximum throttle setting Thats signal bring unlike other systems Plane Saver gives throttle control up set point.all way down Very low power CMOS design ory set 46 volts can adjusted 44 106 volts Works 4 5 cell packs capacity used servo normal reversed mode adjustment sets failsafe throttle limit 0% 1000/0 failsafe throttle works normally up set point ttle operates normally failsafe mode atible radios unit shipped tinned leads also available installed Futaba J connectors shown $800 additionalList price $3995Introductory offer $2995 APPLIED EMGIIIEERIMG 214 241-6060 PO Box 5100 Carrollton TX 75006 division Research corporation Priceo subiect change withoot notice May 1990 75 Special Fast Turnaround Now Available CALL Frequency Conversion $3500 Includes Crystals Certification SpectrumI CalIbrated Test Analyzers1 Instruments UPS US Mail Federal Express Used Mastercard Visa Accepted Large Inventory RIC Parts Crystals /. . Send Large Self Addressed Envelope Brochures 3 Axis Control Easy Construction Ditectftom PATTERN TEE 320-ET uie Cteek Ct San Jo Ca 95125 Te14Ci298-Q3II Ft4Q829i-53S 1950s also Dmeco Sportwing moat Americans Building large Stuntwagon appealed time around dered set plans Fran Ptaszkiewicz began construction powered updated Stuntwagon Su perTigre 46 incorporated wing tip weight compartment adjustable lead-out guide trimming As OTS rules prohibit drop-off landing gear t added sheet aluminum gear Wagon presumably deBolt used later versions Modern glues hardware made better job could have managed back also used muffler pretty much unknown former days airplane finished off butyrate dope Im enjoying refly ing good old days working Stuntwagon thinking about vintage days Control Line Stunt par ticularly deBolt aircraft carried corres pondence Hal now living Florida re lated some history Dmeco Control Line projects Fran Ptaszkiewicz added information few nice letters Putting article together interesting fun help Mike Keville PAMPA newsletter editor OTS enthusiast able round up photos deBolt CL aircraft modelers across country After Hal Dmeco him shifted Control Line Radio Control activity came equally renowned top designer competitor arena Though better remem bered today achievements RC Hal will never lose standing influen tial designers competitors halcyon days Control Line modeling classic CL designs will flying long time come FlyWorm/de Vries Continued page 75 along inner tube walls ejected opening rear end outer spiral propulsion fins keep airstream whirling around outer tube surface sist propelling craft superpropul sion combination spiraling air cur rents both outside tubular wing angle tube placed line flight sustain craft atr COST elimination parts smaller size combination propul sion lift power principles unit structurally adapting itself mass pro duction should bring sales price aircraft within reach great majority people question mod ern factory equipment quantity produc tion price should compare cheapest automobile today Wouldnt have wonderful actually worked author wishes thank Jack Bol Denver CO sharing discovery FlyWorm certainly invention worth uncovering FF Duration/Linstrum Continued page 77 three grams perhaps fuselage must gram sturdier sustain torque whole drive system mere four grams Compare Telco full tank 15 grams MRC Electric 30 grams obvious model lifting heavy power source will climb less thus have less duration heavier motor less efficient ob taining time aloft will get weight effi ciency system dividing total thrust im pulse weight drive unit comes surprise rubber small models still king twice efficiency electricand mercymy favored CO2 drive limps behind last place beauty rubber motors lies fact torque weight duration can modified will suit individual application feel model should climb faster add few strands dont want increase weight shorten loops Infinite possiblilites exist within wide limits Efficiency 87% Electric efficiency 40% goes up Sanyo cells lighter regular Ni Cds Models limited size make mo tor CO2 efficiency 30% Telco compar atively smallthe thrust developed hardly enough keep 25-gram model level flight thrust up notch model will climb dead air flights including glide about minute picture changes rapidly larger CO2 motors brown MJ-70 displaces 70cc will keep 52-gram model aloft three minutes dead air Brown t40 twin two tanks beats rubber performance largest mo tor will run 6-in prop specified AMA rules Czech Modela Cox 020 CO2 Da vis conversion require much larger props can used AMA competition have slightly edited Fritzs remarks HANGAR-7 RIG & C/L MODELS Proffesional Neans Quality Results Cazaorsp1et IKvit PreCut AAA Raisa & Ply PrePonred Landing Gear Spruce & Maple Wood PuliSize Roiled Plans tsstructmons Wheels Controls Etc Inciuded 13 Plin~s Pls-a Kvit shove except 5CUI parts handy temptate sheet provided C PThnas Os-sly Fulisize rolled pians tesplate sheet instructions shipped rirot class sail Free Catalog $59 C $11 Rid CORSAIR 25 Distinctive Gull Wing Pavoritet SemiScale Wing Spant 4k Wing Arear 410 sq Sn Lengtht 341/2 LoadnE 5 Sq Pt Weigh 31/211 Onginet 25 o Sad 4Chasoe S A 7 C $7 tR/C HORNET 574 Spoda Wing Spant 27 WanSq25 Lnadingt il Sz/Sqna ueefl gee $ 13 $9 N/C r Wing Spon iI Wins areat 375 Sq In. Length 351/2 Weightt $39 13 $25 C $9 C/LI DROPIADER 4G nugnip Proflie Fuselage i guiltI Spant 55i/i Areat 540 Sq In. Enginet 40 $24 13 $15 C $7 39 13 S25 C 9 aprenaive Sight Profile Fuselage & RuiltIp Sheeted Wing Wing Spant 52 Areat 435 Sq Sn Enginet 35 Stunt ai~Y C/LI5 Lov Prof ile Fuselage & Soiid Raisa 05055 osog 293/5 Area 305 Sq Engine iS Cu C/LI tilfIE 5255 iS $ 2 2 Sport Piper/Tramoeoi guiltUp Sheeted Wings & Fuseloge Wiog Spant $ reat 200 Sq $7 Dealer Inquiries Invited ORDER YOURS TODAY Please add $4 shipping & handling Send check ar tooney order VISA & MC accepted Ojur street address kits pisese credit cards W STANGEL ENTERPRISES PO BOX 336 Pit t4i4 5484172 WAUKESHA WISCONSiN S31g70338 MEMBER EAA AMA May1990 187 Ideal 4-ycle F3A & AMA fl1ng Basic Ki Pre-tab -Beetle TMSuperStar 6 Basic -built Kit 1S2951 NEW Narukes Silent st 2 4-cycle