Free Flight Duration Ron St Jean AS WAS SAYING piece began July issue suggestion effect upon competitors enjoyment should strongly considered deliberations regarding AMA competition rules changes An analysis beginners events produced added principle beginners should have compete against experts methodof accomplishing suggested also suggested substitution ratio scoring flight time divided engine run present practice coupling engine-run times ffight maximums could serve accomplish three ends 1 Help solve small-field problem 2 Provide flexibility competition now available 3 Permit logical lumping together cate gories now know Well pick up now left off series questions answers about ratio scoring Q5 Im sure flight-time/engine-run ratio would same ship under shorter longer engine runs about javelin launches good thrower could use 00 1second engine run get big score effect could compete large Hand-Launched Glider just happened have engine nose ran short time after heave Also wouldnt ships poor transitions suffer small fields A5 answer first question completely correct Javelin launches short engine runs would favorites rule needed defeat simplest way would return old ROG rise-off-ground re quirement might too severe handi cap VIT-equipped variable-inci dence tail models better way would permit hand-lauching handicap adding couple seconds actual engine run before computing score flight Doing would solve problem before ever became Yes its also true ships poor transition would suffer small fieldsjust today Categories LI III solution would same today Either dont compete plane having poor transition except Category correct transition problem Putting fun Free Flight Gas previously suggested attempt made make rules such way competitive flying would enjoyablethat doing would serve bring folks fold Now lets apply principle FF Gas see something might done actually implement idea something addition use flighttime/engine-run ratio ratio scoring covered earlier some depth 62 Model Aviation 1 5-powered shlp462 sq wing area made byJackCockerham Houston TX test proposed Class RC Duration rules proposal failed Engine runs 20 sec produced 7-mm flights Plane weighs 25 oz features see arrows give away fact its just ordinary competition FF ship rudder pushrod sharp eyes backing plate elevator control horn Glenn Gresens 355-sq-in RC Dura tion model best FF site Baton Rouge LAwhere models permitted outside 400-ft square RC-assist man datory Glenns proposed provisional RC Duration event SEB-88-3 recently ap proved Contest Board inclusion new AMA rule book matrix tells lot about Rons proposed Ratio-Scoring Free Flight competition concept first part discussion appeared July issue Therewould marked reduction number separate FF Gas competition classes records Leonard St Jean VTOs Odd-Rod 375 now 6X plane has TD 049 instead originally installed TD 099 First know modeler must damage lose model order compete successfully because rules cannot adapted work smallest fields degree enjoyment lessened have shown use ratio method scoring can serve effect provide advantages infinite number site categoriesby having category does go far enough since cases maximum duration flights can accommodated available fields 20 sec less other words ratioscoring idea would help small-field problem would solve Clearly something else needed augment ratio-scoring idea something else Radio Controlto keep models small fields idea simple practical wellproven could used increase enjoyment saving broken lost models possible RC idea previously rejected because Free Flighters assumed would forced put RC models order continue compete effective ly attitude easily justified such case intent models employing RC-assist would omly compete otheras present SAM Society Antique Modeler events Implementation ratio-scoring method combined separate events RC-assist could totally forever solve small-field problem FF Gas . would provide competitive enjoyment desired other ways rules could improved help put fun FF Gas can think concerns having events lald-back FF Gas jobs Aerial hot rods exclusively main reason dropped out FF Gas competition was willing convert modern VIT equipped modelstoo much hassleand try might could effectively compete against sans VIT either Sacramento CA contest few years back asked successful local modelers about attitude towards VIT related did like use competitive out like him cant help notice reduction interest contest entries AMA FF Gas has accompanied rapid growth SAM though dropping favor other Now just what does SAM have offer AMA does Certainly find antique designs engines attractive can find two other things may attract people SAM 1 Radio Control may used events solve small-field problem avoid chasing too 2 rules used preclude meteoric rates climbmost SAM FF ships quite laid back possible features perhaps nostalgia offered responsible SAMs growth reason AMA could also offer FF Gas events rules precluded 100-ft/sec climb rates believe could easily accomplished incorporation two provisions rules additional AMA FF Gas events 1 No auto-surfaces permitted 2 power-loading requirement would provide lald-back climb rates desired Continued page 144 September 1987 63 Hon St Jean puts up 957-sq-in Show-Off now has Fox 25 power 6X plane 37 oz VTOs nicely St Jean launches 1/zA RC Duration model 9-mm flight 24 oz probably little large new RCD event Bob Bro gan RC pilotforthestartofthisfiight Ron went bananas testing 6X concept laid-back FF competition Fun-fleet 16 planes consists extended-wing Alpha-One featured MAsAugust 83 Issue plus gaggle Scotsmen Show-Offs Odd-Rods butthe Alpha-One given smaller engines longer noses balance purposes months column devoted talking about BX concept BICO PERFORMANCE 0*00 t*uNCBEII CLIORAS FROM FULL SIZE PATTERNS TOUR CHOICEI ICLUSTRATRO EACH OR SIX PACK PICK OMI SOUTORASTERO PA B BOUGHTRUB4 BITECI phies citations great gab wave recognition chance witness some premier modelers land just important us experiences cannot matched easily forgotten Mothers little pilot returns home bruised battered happy indelible memories head Envious Dont Make big broad splash next years calendar mark USFFC 1988 lay travel plans Sell Mercedes mortgage ranch thats what takes Youll glad did FF Indoor/Tenny Continued page 61 What next Figure 6 shows next develop ment Primary bracing still supports wings tip dihedral extending wing posts above spar leading edge trailing edge tip bracing work off wing posts result much stiffer wing has light spars needs two compression ribs bracing scheme gives rise comment turn fly loose inside bracing gets away must have forgotten some wires Thats still too heavy scheme shown Figure 7 used stiff posts very careful tensioning wires gets rid cabane last two compression ribs wing has two weaknesses 1 sort loose floppy move wing post must youre mounting wing 2 Tip collisions building structure make wing twist isnt bad direction Remember TII ~GRAT LAK5 40 Wing 18 25 Engines Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P o Boo 2136 Fo,foo VIrgInie 22031 U 5 twist washes out tip opposite contact point helps tip drop turning model away obstacle ultimate Well maybe notbut like scheme shown Figure 8 close copy dozens Erv Rodemsky has done integrated wing/motor-stick bracing ex traordinarily effective Y wing posts forming triangular structure little lighter really stiff wing posts ribs top Y tension ribs same wires form tension braces extend forward hook thrust bearing rearward hook rear hook Note fuselage wires dont have tight adequately brace fuselage motor hooked up stick bends slightiy wing motor stick locked rigid structure high angle wires separation between give lot strength torsional support motor stick motor stick start collapsetuck underin high humidity able grab prop shaft thrust bearing straighten out stick working against top bracing help unhooking motor saved whole model whereas might have lost added support top bracing Thats hope ye editor will able fit whole column dozens loose ends keep sketches mind future comments will tie together Bud Tenny PO Box 545 Richardson TX 75080 responding advertisers mention thatyou read aboutthem ModelAviation FF Duration/St Jean Continued page 63 concept finally evolved what now call six-times formula 6X short idea minimum weight model would have six times weight bare enginein cases would out-of-the-box weight including glow plug test 6X formula converted two old models flew 375-sq-in 099-powered job seemed about right 10 oz required 1 7-oz Cox Tee Dee 049 other 1 200-sq-in ship previously flown large powerful Schnuerle-ported 45 fitted ancient 35 having good power 7-ox engine times six equals 45 oz original weight model Both ships ajoy flymore fun have flying decades per formed about same Both bad mediocre climbs excellent glides planes noses extended retain sameor slightly forwardcenter-of-gravity time writing 17 ships have converted 6X formula have flown same results first two. have discovered proportion Gas jobs result maximum flying enjoyment Putting together up to make rules would proceecL Adoption ratio-scoring principle would help solve small-field problem thus add enjoyment would also eliminate need three site categories now structured However categories still needed solve current problems 1 RC-assist events needed totally solve small-field problem and.. 2 Some laid-back events needed please prefer slow-climbing models addition should integrate beginner events encourage newcomers providing reduced-skill events exclude experts competing simplify reduce current 90 National Record slots something manageable scribes AMA HQ Id also recommend reduction number model size-classes purposes establishing records five three matrix envision would look something like the drawing elsewhere column matrix Unlimited rules would authorize VIT have no power loading 144 Model Aviation Classic R/C Scale Puzzled CALL MAll Ibtimie build Mettdo Ill 11ev . ud know 1 Complete 2 Semi-Assembled ready ta cover sanded Call 9am- 8pm lEST 609-395-1672 Send prices Kits Engines accessories P Mitts Model Building PG lex 49 1 Stockton Dive Crunhury NJ 01512 catalogs availablo$3 Rate cards available free 5A5E 4-1/809-1/2 also build Cars Boats Limited would outlaw auto-surface have minimum weight requirements reduce climb rates Record slots would reduced current 90 39 RC-assisted events CD would need authority establish maxi mum flight times needed preclude allday flying thermal next well maximum time return models field after maximum flight time achieved closing Id like thank reader careful consideration ideas expressed two articles share thoughts famous philosopher .The pain new idea greatest pains human nature. after favorite notions may wrong firmest beliefs ill-founded Walter Bagehot Ron St Jean 3394 Dale Dr Carson City NV 89701 Way Was/Noonan Continued page 65 York Model Aero Club 1915 clubs existed major cities across country leading aviation mag azines carried Model Page document ing activities good way exchange practical information advantages balsa tissue cellulose cement modeling materials became bet ter known 1930 materials fairly common America other countries until exposed balsa tissue cellulose through first international contact 1930s modelers used whatever ma terials locally available Amer ican model builders brought balsaand-tissue models 1930 Wakefield International Contest England Brit ish still building models birch thin plywood silk walnut propellers increasing international contact 1 930s onward American standards came universally adopted early models crude heavy produced short flights usually indoors As models im proved structure became increasingly refined flying moved outdoors Lightness strength goals modelers achieving long flights Buoyed attainments some advanced modelersthose financial capabil ity matched ambitionestablished model supply houses Before balsa tissue came staples American modeling spruce commonly used woodbut white pine holly cedar poplar basswood reed also popular Bamboo came 30-in lengths standard allpurpose wood best bamboo Tonkin variety interior China named after shipping port what Indo-China Balsa modeling material dis covered New York City docks 1911 John Carisi prominent member New York Model Aero Club came South America used pack expensive mahogany logs shipped deck cargo Soft wormy balsa lacked quality control enjoy today New York group used motor sticks props plan model using balsa appeared Aeronautics 1913 1918 Chicago modelers using wood Nevertheless hard find long time obtain club leader usually purchased rough planks cut meet club needs remember seeing first balsa arrive Milwaukee 1928 came band-sawed sheets 6 x 36 normal pro cedure time shape own strips sand crude sheet thickness needed 1930 however fair variety cut balsa available both stock packaged kits supply houses also carried variety small gears ball bearing prop shafts aluminum-disc wire-spoked wheels rubber tires well other small hardware like egg-beater winders Interestingly enough two modelbuilding staples supply houses carried came hobby way casket manufacturing industry cellulose cement dope China silk Both materials originally used casket-making Amberoid 1911 spell ing usual cement Clear nitrate Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 ** * * * * ** * ** * ************** ***** **** * * ***** 0 BALSA WOOD 72 complete setGLIDER PLANS 0 INEXPEN5IVE 0- EASY TO BUILD __jf \40 FLYING MODELS MOUS AIRCRAFT REPLICAS %zz% 0-RUBBER BAND HAND LAUNCH ADIIA EACH UNIQUE FIT INC TO ORDER COMPLETE STAR KRAFT MADE FRAN I/IA SHEETSET OE PLANSPO BOX 321 BALSA 3/16 STICK BALSASEND 5750 PLUSBOUNTIFUL UT 84010 USC LESS THAN ONE SHEET$150 POSTAGE TO AND ANF 551 IE FF6 MODEL I 17 DIFFERENT PLANS INCLUDING F-isF-iS F-18F-4 U-2A-S SPACE SHUTTLE 10 OTHERS September1987 145 TWIN STAR Newest Opposed Twin 2-Cycle Low Price Weighs Only 27 Lbs* first own brand new lightweights Peoples Republic China just arrived U S Simultaneous firing minimizes vibration Massive crankshaft riding double ball bearings increases performance reduces maintenance Youll have fly believe EHS TRADING would like thank IMAA hospitality during RALLY OF GIANTS 87 Converse Indiana EHS TRADING LTD information contact PO Box 4325 RNa PiB Introductory PRICE 995* WItHOUT MUFFLER 400 Hualani St Bldg 13E Hilo Hawaii 96720Phone 800-634-6229 x 634486 EHS UW j- KITTEN ULTRALIGHT 1
Edition: Model Aviation - 1987/09
Page Numbers: 62, 63, 144, 145
Free Flight Duration Ron St Jean AS WAS SAYING piece began July issue suggestion effect upon competitors enjoyment should strongly considered deliberations regarding AMA competition rules changes An analysis beginners events produced added principle beginners should have compete against experts methodof accomplishing suggested also suggested substitution ratio scoring flight time divided engine run present practice coupling engine-run times ffight maximums could serve accomplish three ends 1 Help solve small-field problem 2 Provide flexibility competition now available 3 Permit logical lumping together cate gories now know Well pick up now left off series questions answers about ratio scoring Q5 Im sure flight-time/engine-run ratio would same ship under shorter longer engine runs about javelin launches good thrower could use 00 1second engine run get big score effect could compete large Hand-Launched Glider just happened have engine nose ran short time after heave Also wouldnt ships poor transitions suffer small fields A5 answer first question completely correct Javelin launches short engine runs would favorites rule needed defeat simplest way would return old ROG rise-off-ground re quirement might too severe handi cap VIT-equipped variable-inci dence tail models better way would permit hand-lauching handicap adding couple seconds actual engine run before computing score flight Doing would solve problem before ever became Yes its also true ships poor transition would suffer small fieldsjust today Categories LI III solution would same today Either dont compete plane having poor transition except Category correct transition problem Putting fun Free Flight Gas previously suggested attempt made make rules such way competitive flying would enjoyablethat doing would serve bring folks fold Now lets apply principle FF Gas see something might done actually implement idea something addition use flighttime/engine-run ratio ratio scoring covered earlier some depth 62 Model Aviation 1 5-powered shlp462 sq wing area made byJackCockerham Houston TX test proposed Class RC Duration rules proposal failed Engine runs 20 sec produced 7-mm flights Plane weighs 25 oz features see arrows give away fact its just ordinary competition FF ship rudder pushrod sharp eyes backing plate elevator control horn Glenn Gresens 355-sq-in RC Dura tion model best FF site Baton Rouge LAwhere models permitted outside 400-ft square RC-assist man datory Glenns proposed provisional RC Duration event SEB-88-3 recently ap proved Contest Board inclusion new AMA rule book matrix tells lot about Rons proposed Ratio-Scoring Free Flight competition concept first part discussion appeared July issue Therewould marked reduction number separate FF Gas competition classes records Leonard St Jean VTOs Odd-Rod 375 now 6X plane has TD 049 instead originally installed TD 099 First know modeler must damage lose model order compete successfully because rules cannot adapted work smallest fields degree enjoyment lessened have shown use ratio method scoring can serve effect provide advantages infinite number site categoriesby having category does go far enough since cases maximum duration flights can accommodated available fields 20 sec less other words ratioscoring idea would help small-field problem would solve Clearly something else needed augment ratio-scoring idea something else Radio Controlto keep models small fields idea simple practical wellproven could used increase enjoyment saving broken lost models possible RC idea previously rejected because Free Flighters assumed would forced put RC models order continue compete effective ly attitude easily justified such case intent models employing RC-assist would omly compete otheras present SAM Society Antique Modeler events Implementation ratio-scoring method combined separate events RC-assist could totally forever solve small-field problem FF Gas . would provide competitive enjoyment desired other ways rules could improved help put fun FF Gas can think concerns having events lald-back FF Gas jobs Aerial hot rods exclusively main reason dropped out FF Gas competition was willing convert modern VIT equipped modelstoo much hassleand try might could effectively compete against sans VIT either Sacramento CA contest few years back asked successful local modelers about attitude towards VIT related did like use competitive out like him cant help notice reduction interest contest entries AMA FF Gas has accompanied rapid growth SAM though dropping favor other Now just what does SAM have offer AMA does Certainly find antique designs engines attractive can find two other things may attract people SAM 1 Radio Control may used events solve small-field problem avoid chasing too 2 rules used preclude meteoric rates climbmost SAM FF ships quite laid back possible features perhaps nostalgia offered responsible SAMs growth reason AMA could also offer FF Gas events rules precluded 100-ft/sec climb rates believe could easily accomplished incorporation two provisions rules additional AMA FF Gas events 1 No auto-surfaces permitted 2 power-loading requirement would provide lald-back climb rates desired Continued page 144 September 1987 63 Hon St Jean puts up 957-sq-in Show-Off now has Fox 25 power 6X plane 37 oz VTOs nicely St Jean launches 1/zA RC Duration model 9-mm flight 24 oz probably little large new RCD event Bob Bro gan RC pilotforthestartofthisfiight Ron went bananas testing 6X concept laid-back FF competition Fun-fleet 16 planes consists extended-wing Alpha-One featured MAsAugust 83 Issue plus gaggle Scotsmen Show-Offs Odd-Rods butthe Alpha-One given smaller engines longer noses balance purposes months column devoted talking about BX concept BICO PERFORMANCE 0*00 t*uNCBEII CLIORAS FROM FULL SIZE PATTERNS TOUR CHOICEI ICLUSTRATRO EACH OR SIX PACK PICK OMI SOUTORASTERO PA B BOUGHTRUB4 BITECI phies citations great gab wave recognition chance witness some premier modelers land just important us experiences cannot matched easily forgotten Mothers little pilot returns home bruised battered happy indelible memories head Envious Dont Make big broad splash next years calendar mark USFFC 1988 lay travel plans Sell Mercedes mortgage ranch thats what takes Youll glad did FF Indoor/Tenny Continued page 61 What next Figure 6 shows next develop ment Primary bracing still supports wings tip dihedral extending wing posts above spar leading edge trailing edge tip bracing work off wing posts result much stiffer wing has light spars needs two compression ribs bracing scheme gives rise comment turn fly loose inside bracing gets away must have forgotten some wires Thats still too heavy scheme shown Figure 7 used stiff posts very careful tensioning wires gets rid cabane last two compression ribs wing has two weaknesses 1 sort loose floppy move wing post must youre mounting wing 2 Tip collisions building structure make wing twist isnt bad direction Remember TII ~GRAT LAK5 40 Wing 18 25 Engines Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P o Boo 2136 Fo,foo VIrgInie 22031 U 5 twist washes out tip opposite contact point helps tip drop turning model away obstacle ultimate Well maybe notbut like scheme shown Figure 8 close copy dozens Erv Rodemsky has done integrated wing/motor-stick bracing ex traordinarily effective Y wing posts forming triangular structure little lighter really stiff wing posts ribs top Y tension ribs same wires form tension braces extend forward hook thrust bearing rearward hook rear hook Note fuselage wires dont have tight adequately brace fuselage motor hooked up stick bends slightiy wing motor stick locked rigid structure high angle wires separation between give lot strength torsional support motor stick motor stick start collapsetuck underin high humidity able grab prop shaft thrust bearing straighten out stick working against top bracing help unhooking motor saved whole model whereas might have lost added support top bracing Thats hope ye editor will able fit whole column dozens loose ends keep sketches mind future comments will tie together Bud Tenny PO Box 545 Richardson TX 75080 responding advertisers mention thatyou read aboutthem ModelAviation FF Duration/St Jean Continued page 63 concept finally evolved what now call six-times formula 6X short idea minimum weight model would have six times weight bare enginein cases would out-of-the-box weight including glow plug test 6X formula converted two old models flew 375-sq-in 099-powered job seemed about right 10 oz required 1 7-oz Cox Tee Dee 049 other 1 200-sq-in ship previously flown large powerful Schnuerle-ported 45 fitted ancient 35 having good power 7-ox engine times six equals 45 oz original weight model Both ships ajoy flymore fun have flying decades per formed about same Both bad mediocre climbs excellent glides planes noses extended retain sameor slightly forwardcenter-of-gravity time writing 17 ships have converted 6X formula have flown same results first two. have discovered proportion Gas jobs result maximum flying enjoyment Putting together up to make rules would proceecL Adoption ratio-scoring principle would help solve small-field problem thus add enjoyment would also eliminate need three site categories now structured However categories still needed solve current problems 1 RC-assist events needed totally solve small-field problem and.. 2 Some laid-back events needed please prefer slow-climbing models addition should integrate beginner events encourage newcomers providing reduced-skill events exclude experts competing simplify reduce current 90 National Record slots something manageable scribes AMA HQ Id also recommend reduction number model size-classes purposes establishing records five three matrix envision would look something like the drawing elsewhere column matrix Unlimited rules would authorize VIT have no power loading 144 Model Aviation Classic R/C Scale Puzzled CALL MAll Ibtimie build Mettdo Ill 11ev . ud know 1 Complete 2 Semi-Assembled ready ta cover sanded Call 9am- 8pm lEST 609-395-1672 Send prices Kits Engines accessories P Mitts Model Building PG lex 49 1 Stockton Dive Crunhury NJ 01512 catalogs availablo$3 Rate cards available free 5A5E 4-1/809-1/2 also build Cars Boats Limited would outlaw auto-surface have minimum weight requirements reduce climb rates Record slots would reduced current 90 39 RC-assisted events CD would need authority establish maxi mum flight times needed preclude allday flying thermal next well maximum time return models field after maximum flight time achieved closing Id like thank reader careful consideration ideas expressed two articles share thoughts famous philosopher .The pain new idea greatest pains human nature. after favorite notions may wrong firmest beliefs ill-founded Walter Bagehot Ron St Jean 3394 Dale Dr Carson City NV 89701 Way Was/Noonan Continued page 65 York Model Aero Club 1915 clubs existed major cities across country leading aviation mag azines carried Model Page document ing activities good way exchange practical information advantages balsa tissue cellulose cement modeling materials became bet ter known 1930 materials fairly common America other countries until exposed balsa tissue cellulose through first international contact 1930s modelers used whatever ma terials locally available Amer ican model builders brought balsaand-tissue models 1930 Wakefield International Contest England Brit ish still building models birch thin plywood silk walnut propellers increasing international contact 1 930s onward American standards came universally adopted early models crude heavy produced short flights usually indoors As models im proved structure became increasingly refined flying moved outdoors Lightness strength goals modelers achieving long flights Buoyed attainments some advanced modelersthose financial capabil ity matched ambitionestablished model supply houses Before balsa tissue came staples American modeling spruce commonly used woodbut white pine holly cedar poplar basswood reed also popular Bamboo came 30-in lengths standard allpurpose wood best bamboo Tonkin variety interior China named after shipping port what Indo-China Balsa modeling material dis covered New York City docks 1911 John Carisi prominent member New York Model Aero Club came South America used pack expensive mahogany logs shipped deck cargo Soft wormy balsa lacked quality control enjoy today New York group used motor sticks props plan model using balsa appeared Aeronautics 1913 1918 Chicago modelers using wood Nevertheless hard find long time obtain club leader usually purchased rough planks cut meet club needs remember seeing first balsa arrive Milwaukee 1928 came band-sawed sheets 6 x 36 normal pro cedure time shape own strips sand crude sheet thickness needed 1930 however fair variety cut balsa available both stock packaged kits supply houses also carried variety small gears ball bearing prop shafts aluminum-disc wire-spoked wheels rubber tires well other small hardware like egg-beater winders Interestingly enough two modelbuilding staples supply houses carried came hobby way casket manufacturing industry cellulose cement dope China silk Both materials originally used casket-making Amberoid 1911 spell ing usual cement Clear nitrate Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 ** * * * * ** * ** * ************** ***** **** * * ***** 0 BALSA WOOD 72 complete setGLIDER PLANS 0 INEXPEN5IVE 0- EASY TO BUILD __jf \40 FLYING MODELS MOUS AIRCRAFT REPLICAS %zz% 0-RUBBER BAND HAND LAUNCH ADIIA EACH UNIQUE FIT INC TO ORDER COMPLETE STAR KRAFT MADE FRAN I/IA SHEETSET OE PLANSPO BOX 321 BALSA 3/16 STICK BALSASEND 5750 PLUSBOUNTIFUL UT 84010 USC LESS THAN ONE SHEET$150 POSTAGE TO AND ANF 551 IE FF6 MODEL I 17 DIFFERENT PLANS INCLUDING F-isF-iS F-18F-4 U-2A-S SPACE SHUTTLE 10 OTHERS September1987 145 TWIN STAR Newest Opposed Twin 2-Cycle Low Price Weighs Only 27 Lbs* first own brand new lightweights Peoples Republic China just arrived U S Simultaneous firing minimizes vibration Massive crankshaft riding double ball bearings increases performance reduces maintenance Youll have fly believe EHS TRADING would like thank IMAA hospitality during RALLY OF GIANTS 87 Converse Indiana EHS TRADING LTD information contact PO Box 4325 RNa PiB Introductory PRICE 995* WItHOUT MUFFLER 400 Hualani St Bldg 13E Hilo Hawaii 96720Phone 800-634-6229 x 634486 EHS UW j- KITTEN ULTRALIGHT 1
Edition: Model Aviation - 1987/09
Page Numbers: 62, 63, 144, 145
Free Flight Duration Ron St Jean AS WAS SAYING piece began July issue suggestion effect upon competitors enjoyment should strongly considered deliberations regarding AMA competition rules changes An analysis beginners events produced added principle beginners should have compete against experts methodof accomplishing suggested also suggested substitution ratio scoring flight time divided engine run present practice coupling engine-run times ffight maximums could serve accomplish three ends 1 Help solve small-field problem 2 Provide flexibility competition now available 3 Permit logical lumping together cate gories now know Well pick up now left off series questions answers about ratio scoring Q5 Im sure flight-time/engine-run ratio would same ship under shorter longer engine runs about javelin launches good thrower could use 00 1second engine run get big score effect could compete large Hand-Launched Glider just happened have engine nose ran short time after heave Also wouldnt ships poor transitions suffer small fields A5 answer first question completely correct Javelin launches short engine runs would favorites rule needed defeat simplest way would return old ROG rise-off-ground re quirement might too severe handi cap VIT-equipped variable-inci dence tail models better way would permit hand-lauching handicap adding couple seconds actual engine run before computing score flight Doing would solve problem before ever became Yes its also true ships poor transition would suffer small fieldsjust today Categories LI III solution would same today Either dont compete plane having poor transition except Category correct transition problem Putting fun Free Flight Gas previously suggested attempt made make rules such way competitive flying would enjoyablethat doing would serve bring folks fold Now lets apply principle FF Gas see something might done actually implement idea something addition use flighttime/engine-run ratio ratio scoring covered earlier some depth 62 Model Aviation 1 5-powered shlp462 sq wing area made byJackCockerham Houston TX test proposed Class RC Duration rules proposal failed Engine runs 20 sec produced 7-mm flights Plane weighs 25 oz features see arrows give away fact its just ordinary competition FF ship rudder pushrod sharp eyes backing plate elevator control horn Glenn Gresens 355-sq-in RC Dura tion model best FF site Baton Rouge LAwhere models permitted outside 400-ft square RC-assist man datory Glenns proposed provisional RC Duration event SEB-88-3 recently ap proved Contest Board inclusion new AMA rule book matrix tells lot about Rons proposed Ratio-Scoring Free Flight competition concept first part discussion appeared July issue Therewould marked reduction number separate FF Gas competition classes records Leonard St Jean VTOs Odd-Rod 375 now 6X plane has TD 049 instead originally installed TD 099 First know modeler must damage lose model order compete successfully because rules cannot adapted work smallest fields degree enjoyment lessened have shown use ratio method scoring can serve effect provide advantages infinite number site categoriesby having category does go far enough since cases maximum duration flights can accommodated available fields 20 sec less other words ratioscoring idea would help small-field problem would solve Clearly something else needed augment ratio-scoring idea something else Radio Controlto keep models small fields idea simple practical wellproven could used increase enjoyment saving broken lost models possible RC idea previously rejected because Free Flighters assumed would forced put RC models order continue compete effective ly attitude easily justified such case intent models employing RC-assist would omly compete otheras present SAM Society Antique Modeler events Implementation ratio-scoring method combined separate events RC-assist could totally forever solve small-field problem FF Gas . would provide competitive enjoyment desired other ways rules could improved help put fun FF Gas can think concerns having events lald-back FF Gas jobs Aerial hot rods exclusively main reason dropped out FF Gas competition was willing convert modern VIT equipped modelstoo much hassleand try might could effectively compete against sans VIT either Sacramento CA contest few years back asked successful local modelers about attitude towards VIT related did like use competitive out like him cant help notice reduction interest contest entries AMA FF Gas has accompanied rapid growth SAM though dropping favor other Now just what does SAM have offer AMA does Certainly find antique designs engines attractive can find two other things may attract people SAM 1 Radio Control may used events solve small-field problem avoid chasing too 2 rules used preclude meteoric rates climbmost SAM FF ships quite laid back possible features perhaps nostalgia offered responsible SAMs growth reason AMA could also offer FF Gas events rules precluded 100-ft/sec climb rates believe could easily accomplished incorporation two provisions rules additional AMA FF Gas events 1 No auto-surfaces permitted 2 power-loading requirement would provide lald-back climb rates desired Continued page 144 September 1987 63 Hon St Jean puts up 957-sq-in Show-Off now has Fox 25 power 6X plane 37 oz VTOs nicely St Jean launches 1/zA RC Duration model 9-mm flight 24 oz probably little large new RCD event Bob Bro gan RC pilotforthestartofthisfiight Ron went bananas testing 6X concept laid-back FF competition Fun-fleet 16 planes consists extended-wing Alpha-One featured MAsAugust 83 Issue plus gaggle Scotsmen Show-Offs Odd-Rods butthe Alpha-One given smaller engines longer noses balance purposes months column devoted talking about BX concept BICO PERFORMANCE 0*00 t*uNCBEII CLIORAS FROM FULL SIZE PATTERNS TOUR CHOICEI ICLUSTRATRO EACH OR SIX PACK PICK OMI SOUTORASTERO PA B BOUGHTRUB4 BITECI phies citations great gab wave recognition chance witness some premier modelers land just important us experiences cannot matched easily forgotten Mothers little pilot returns home bruised battered happy indelible memories head Envious Dont Make big broad splash next years calendar mark USFFC 1988 lay travel plans Sell Mercedes mortgage ranch thats what takes Youll glad did FF Indoor/Tenny Continued page 61 What next Figure 6 shows next develop ment Primary bracing still supports wings tip dihedral extending wing posts above spar leading edge trailing edge tip bracing work off wing posts result much stiffer wing has light spars needs two compression ribs bracing scheme gives rise comment turn fly loose inside bracing gets away must have forgotten some wires Thats still too heavy scheme shown Figure 7 used stiff posts very careful tensioning wires gets rid cabane last two compression ribs wing has two weaknesses 1 sort loose floppy move wing post must youre mounting wing 2 Tip collisions building structure make wing twist isnt bad direction Remember TII ~GRAT LAK5 40 Wing 18 25 Engines Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P o Boo 2136 Fo,foo VIrgInie 22031 U 5 twist washes out tip opposite contact point helps tip drop turning model away obstacle ultimate Well maybe notbut like scheme shown Figure 8 close copy dozens Erv Rodemsky has done integrated wing/motor-stick bracing ex traordinarily effective Y wing posts forming triangular structure little lighter really stiff wing posts ribs top Y tension ribs same wires form tension braces extend forward hook thrust bearing rearward hook rear hook Note fuselage wires dont have tight adequately brace fuselage motor hooked up stick bends slightiy wing motor stick locked rigid structure high angle wires separation between give lot strength torsional support motor stick motor stick start collapsetuck underin high humidity able grab prop shaft thrust bearing straighten out stick working against top bracing help unhooking motor saved whole model whereas might have lost added support top bracing Thats hope ye editor will able fit whole column dozens loose ends keep sketches mind future comments will tie together Bud Tenny PO Box 545 Richardson TX 75080 responding advertisers mention thatyou read aboutthem ModelAviation FF Duration/St Jean Continued page 63 concept finally evolved what now call six-times formula 6X short idea minimum weight model would have six times weight bare enginein cases would out-of-the-box weight including glow plug test 6X formula converted two old models flew 375-sq-in 099-powered job seemed about right 10 oz required 1 7-oz Cox Tee Dee 049 other 1 200-sq-in ship previously flown large powerful Schnuerle-ported 45 fitted ancient 35 having good power 7-ox engine times six equals 45 oz original weight model Both ships ajoy flymore fun have flying decades per formed about same Both bad mediocre climbs excellent glides planes noses extended retain sameor slightly forwardcenter-of-gravity time writing 17 ships have converted 6X formula have flown same results first two. have discovered proportion Gas jobs result maximum flying enjoyment Putting together up to make rules would proceecL Adoption ratio-scoring principle would help solve small-field problem thus add enjoyment would also eliminate need three site categories now structured However categories still needed solve current problems 1 RC-assist events needed totally solve small-field problem and.. 2 Some laid-back events needed please prefer slow-climbing models addition should integrate beginner events encourage newcomers providing reduced-skill events exclude experts competing simplify reduce current 90 National Record slots something manageable scribes AMA HQ Id also recommend reduction number model size-classes purposes establishing records five three matrix envision would look something like the drawing elsewhere column matrix Unlimited rules would authorize VIT have no power loading 144 Model Aviation Classic R/C Scale Puzzled CALL MAll Ibtimie build Mettdo Ill 11ev . ud know 1 Complete 2 Semi-Assembled ready ta cover sanded Call 9am- 8pm lEST 609-395-1672 Send prices Kits Engines accessories P Mitts Model Building PG lex 49 1 Stockton Dive Crunhury NJ 01512 catalogs availablo$3 Rate cards available free 5A5E 4-1/809-1/2 also build Cars Boats Limited would outlaw auto-surface have minimum weight requirements reduce climb rates Record slots would reduced current 90 39 RC-assisted events CD would need authority establish maxi mum flight times needed preclude allday flying thermal next well maximum time return models field after maximum flight time achieved closing Id like thank reader careful consideration ideas expressed two articles share thoughts famous philosopher .The pain new idea greatest pains human nature. after favorite notions may wrong firmest beliefs ill-founded Walter Bagehot Ron St Jean 3394 Dale Dr Carson City NV 89701 Way Was/Noonan Continued page 65 York Model Aero Club 1915 clubs existed major cities across country leading aviation mag azines carried Model Page document ing activities good way exchange practical information advantages balsa tissue cellulose cement modeling materials became bet ter known 1930 materials fairly common America other countries until exposed balsa tissue cellulose through first international contact 1930s modelers used whatever ma terials locally available Amer ican model builders brought balsaand-tissue models 1930 Wakefield International Contest England Brit ish still building models birch thin plywood silk walnut propellers increasing international contact 1 930s onward American standards came universally adopted early models crude heavy produced short flights usually indoors As models im proved structure became increasingly refined flying moved outdoors Lightness strength goals modelers achieving long flights Buoyed attainments some advanced modelersthose financial capabil ity matched ambitionestablished model supply houses Before balsa tissue came staples American modeling spruce commonly used woodbut white pine holly cedar poplar basswood reed also popular Bamboo came 30-in lengths standard allpurpose wood best bamboo Tonkin variety interior China named after shipping port what Indo-China Balsa modeling material dis covered New York City docks 1911 John Carisi prominent member New York Model Aero Club came South America used pack expensive mahogany logs shipped deck cargo Soft wormy balsa lacked quality control enjoy today New York group used motor sticks props plan model using balsa appeared Aeronautics 1913 1918 Chicago modelers using wood Nevertheless hard find long time obtain club leader usually purchased rough planks cut meet club needs remember seeing first balsa arrive Milwaukee 1928 came band-sawed sheets 6 x 36 normal pro cedure time shape own strips sand crude sheet thickness needed 1930 however fair variety cut balsa available both stock packaged kits supply houses also carried variety small gears ball bearing prop shafts aluminum-disc wire-spoked wheels rubber tires well other small hardware like egg-beater winders Interestingly enough two modelbuilding staples supply houses carried came hobby way casket manufacturing industry cellulose cement dope China silk Both materials originally used casket-making Amberoid 1911 spell ing usual cement Clear nitrate Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 ** * * * * ** * ** * ************** ***** **** * * ***** 0 BALSA WOOD 72 complete setGLIDER PLANS 0 INEXPEN5IVE 0- EASY TO BUILD __jf \40 FLYING MODELS MOUS AIRCRAFT REPLICAS %zz% 0-RUBBER BAND HAND LAUNCH ADIIA EACH UNIQUE FIT INC TO ORDER COMPLETE STAR KRAFT MADE FRAN I/IA SHEETSET OE PLANSPO BOX 321 BALSA 3/16 STICK BALSASEND 5750 PLUSBOUNTIFUL UT 84010 USC LESS THAN ONE SHEET$150 POSTAGE TO AND ANF 551 IE FF6 MODEL I 17 DIFFERENT PLANS INCLUDING F-isF-iS F-18F-4 U-2A-S SPACE SHUTTLE 10 OTHERS September1987 145 TWIN STAR Newest Opposed Twin 2-Cycle Low Price Weighs Only 27 Lbs* first own brand new lightweights Peoples Republic China just arrived U S Simultaneous firing minimizes vibration Massive crankshaft riding double ball bearings increases performance reduces maintenance Youll have fly believe EHS TRADING would like thank IMAA hospitality during RALLY OF GIANTS 87 Converse Indiana EHS TRADING LTD information contact PO Box 4325 RNa PiB Introductory PRICE 995* WItHOUT MUFFLER 400 Hualani St Bldg 13E Hilo Hawaii 96720Phone 800-634-6229 x 634486 EHS UW j- KITTEN ULTRALIGHT 1
Edition: Model Aviation - 1987/09
Page Numbers: 62, 63, 144, 145
Free Flight Duration Ron St Jean AS WAS SAYING piece began July issue suggestion effect upon competitors enjoyment should strongly considered deliberations regarding AMA competition rules changes An analysis beginners events produced added principle beginners should have compete against experts methodof accomplishing suggested also suggested substitution ratio scoring flight time divided engine run present practice coupling engine-run times ffight maximums could serve accomplish three ends 1 Help solve small-field problem 2 Provide flexibility competition now available 3 Permit logical lumping together cate gories now know Well pick up now left off series questions answers about ratio scoring Q5 Im sure flight-time/engine-run ratio would same ship under shorter longer engine runs about javelin launches good thrower could use 00 1second engine run get big score effect could compete large Hand-Launched Glider just happened have engine nose ran short time after heave Also wouldnt ships poor transitions suffer small fields A5 answer first question completely correct Javelin launches short engine runs would favorites rule needed defeat simplest way would return old ROG rise-off-ground re quirement might too severe handi cap VIT-equipped variable-inci dence tail models better way would permit hand-lauching handicap adding couple seconds actual engine run before computing score flight Doing would solve problem before ever became Yes its also true ships poor transition would suffer small fieldsjust today Categories LI III solution would same today Either dont compete plane having poor transition except Category correct transition problem Putting fun Free Flight Gas previously suggested attempt made make rules such way competitive flying would enjoyablethat doing would serve bring folks fold Now lets apply principle FF Gas see something might done actually implement idea something addition use flighttime/engine-run ratio ratio scoring covered earlier some depth 62 Model Aviation 1 5-powered shlp462 sq wing area made byJackCockerham Houston TX test proposed Class RC Duration rules proposal failed Engine runs 20 sec produced 7-mm flights Plane weighs 25 oz features see arrows give away fact its just ordinary competition FF ship rudder pushrod sharp eyes backing plate elevator control horn Glenn Gresens 355-sq-in RC Dura tion model best FF site Baton Rouge LAwhere models permitted outside 400-ft square RC-assist man datory Glenns proposed provisional RC Duration event SEB-88-3 recently ap proved Contest Board inclusion new AMA rule book matrix tells lot about Rons proposed Ratio-Scoring Free Flight competition concept first part discussion appeared July issue Therewould marked reduction number separate FF Gas competition classes records Leonard St Jean VTOs Odd-Rod 375 now 6X plane has TD 049 instead originally installed TD 099 First know modeler must damage lose model order compete successfully because rules cannot adapted work smallest fields degree enjoyment lessened have shown use ratio method scoring can serve effect provide advantages infinite number site categoriesby having category does go far enough since cases maximum duration flights can accommodated available fields 20 sec less other words ratioscoring idea would help small-field problem would solve Clearly something else needed augment ratio-scoring idea something else Radio Controlto keep models small fields idea simple practical wellproven could used increase enjoyment saving broken lost models possible RC idea previously rejected because Free Flighters assumed would forced put RC models order continue compete effective ly attitude easily justified such case intent models employing RC-assist would omly compete otheras present SAM Society Antique Modeler events Implementation ratio-scoring method combined separate events RC-assist could totally forever solve small-field problem FF Gas . would provide competitive enjoyment desired other ways rules could improved help put fun FF Gas can think concerns having events lald-back FF Gas jobs Aerial hot rods exclusively main reason dropped out FF Gas competition was willing convert modern VIT equipped modelstoo much hassleand try might could effectively compete against sans VIT either Sacramento CA contest few years back asked successful local modelers about attitude towards VIT related did like use competitive out like him cant help notice reduction interest contest entries AMA FF Gas has accompanied rapid growth SAM though dropping favor other Now just what does SAM have offer AMA does Certainly find antique designs engines attractive can find two other things may attract people SAM 1 Radio Control may used events solve small-field problem avoid chasing too 2 rules used preclude meteoric rates climbmost SAM FF ships quite laid back possible features perhaps nostalgia offered responsible SAMs growth reason AMA could also offer FF Gas events rules precluded 100-ft/sec climb rates believe could easily accomplished incorporation two provisions rules additional AMA FF Gas events 1 No auto-surfaces permitted 2 power-loading requirement would provide lald-back climb rates desired Continued page 144 September 1987 63 Hon St Jean puts up 957-sq-in Show-Off now has Fox 25 power 6X plane 37 oz VTOs nicely St Jean launches 1/zA RC Duration model 9-mm flight 24 oz probably little large new RCD event Bob Bro gan RC pilotforthestartofthisfiight Ron went bananas testing 6X concept laid-back FF competition Fun-fleet 16 planes consists extended-wing Alpha-One featured MAsAugust 83 Issue plus gaggle Scotsmen Show-Offs Odd-Rods butthe Alpha-One given smaller engines longer noses balance purposes months column devoted talking about BX concept BICO PERFORMANCE 0*00 t*uNCBEII CLIORAS FROM FULL SIZE PATTERNS TOUR CHOICEI ICLUSTRATRO EACH OR SIX PACK PICK OMI SOUTORASTERO PA B BOUGHTRUB4 BITECI phies citations great gab wave recognition chance witness some premier modelers land just important us experiences cannot matched easily forgotten Mothers little pilot returns home bruised battered happy indelible memories head Envious Dont Make big broad splash next years calendar mark USFFC 1988 lay travel plans Sell Mercedes mortgage ranch thats what takes Youll glad did FF Indoor/Tenny Continued page 61 What next Figure 6 shows next develop ment Primary bracing still supports wings tip dihedral extending wing posts above spar leading edge trailing edge tip bracing work off wing posts result much stiffer wing has light spars needs two compression ribs bracing scheme gives rise comment turn fly loose inside bracing gets away must have forgotten some wires Thats still too heavy scheme shown Figure 7 used stiff posts very careful tensioning wires gets rid cabane last two compression ribs wing has two weaknesses 1 sort loose floppy move wing post must youre mounting wing 2 Tip collisions building structure make wing twist isnt bad direction Remember TII ~GRAT LAK5 40 Wing 18 25 Engines Dealers ributors Welcomed Phone 703 273-9593 FLYLINE MODELS INC P o Boo 2136 Fo,foo VIrgInie 22031 U 5 twist washes out tip opposite contact point helps tip drop turning model away obstacle ultimate Well maybe notbut like scheme shown Figure 8 close copy dozens Erv Rodemsky has done integrated wing/motor-stick bracing ex traordinarily effective Y wing posts forming triangular structure little lighter really stiff wing posts ribs top Y tension ribs same wires form tension braces extend forward hook thrust bearing rearward hook rear hook Note fuselage wires dont have tight adequately brace fuselage motor hooked up stick bends slightiy wing motor stick locked rigid structure high angle wires separation between give lot strength torsional support motor stick motor stick start collapsetuck underin high humidity able grab prop shaft thrust bearing straighten out stick working against top bracing help unhooking motor saved whole model whereas might have lost added support top bracing Thats hope ye editor will able fit whole column dozens loose ends keep sketches mind future comments will tie together Bud Tenny PO Box 545 Richardson TX 75080 responding advertisers mention thatyou read aboutthem ModelAviation FF Duration/St Jean Continued page 63 concept finally evolved what now call six-times formula 6X short idea minimum weight model would have six times weight bare enginein cases would out-of-the-box weight including glow plug test 6X formula converted two old models flew 375-sq-in 099-powered job seemed about right 10 oz required 1 7-oz Cox Tee Dee 049 other 1 200-sq-in ship previously flown large powerful Schnuerle-ported 45 fitted ancient 35 having good power 7-ox engine times six equals 45 oz original weight model Both ships ajoy flymore fun have flying decades per formed about same Both bad mediocre climbs excellent glides planes noses extended retain sameor slightly forwardcenter-of-gravity time writing 17 ships have converted 6X formula have flown same results first two. have discovered proportion Gas jobs result maximum flying enjoyment Putting together up to make rules would proceecL Adoption ratio-scoring principle would help solve small-field problem thus add enjoyment would also eliminate need three site categories now structured However categories still needed solve current problems 1 RC-assist events needed totally solve small-field problem and.. 2 Some laid-back events needed please prefer slow-climbing models addition should integrate beginner events encourage newcomers providing reduced-skill events exclude experts competing simplify reduce current 90 National Record slots something manageable scribes AMA HQ Id also recommend reduction number model size-classes purposes establishing records five three matrix envision would look something like the drawing elsewhere column matrix Unlimited rules would authorize VIT have no power loading 144 Model Aviation Classic R/C Scale Puzzled CALL MAll Ibtimie build Mettdo Ill 11ev . ud know 1 Complete 2 Semi-Assembled ready ta cover sanded Call 9am- 8pm lEST 609-395-1672 Send prices Kits Engines accessories P Mitts Model Building PG lex 49 1 Stockton Dive Crunhury NJ 01512 catalogs availablo$3 Rate cards available free 5A5E 4-1/809-1/2 also build Cars Boats Limited would outlaw auto-surface have minimum weight requirements reduce climb rates Record slots would reduced current 90 39 RC-assisted events CD would need authority establish maxi mum flight times needed preclude allday flying thermal next well maximum time return models field after maximum flight time achieved closing Id like thank reader careful consideration ideas expressed two articles share thoughts famous philosopher .The pain new idea greatest pains human nature. after favorite notions may wrong firmest beliefs ill-founded Walter Bagehot Ron St Jean 3394 Dale Dr Carson City NV 89701 Way Was/Noonan Continued page 65 York Model Aero Club 1915 clubs existed major cities across country leading aviation mag azines carried Model Page document ing activities good way exchange practical information advantages balsa tissue cellulose cement modeling materials became bet ter known 1930 materials fairly common America other countries until exposed balsa tissue cellulose through first international contact 1930s modelers used whatever ma terials locally available Amer ican model builders brought balsaand-tissue models 1930 Wakefield International Contest England Brit ish still building models birch thin plywood silk walnut propellers increasing international contact 1 930s onward American standards came universally adopted early models crude heavy produced short flights usually indoors As models im proved structure became increasingly refined flying moved outdoors Lightness strength goals modelers achieving long flights Buoyed attainments some advanced modelersthose financial capabil ity matched ambitionestablished model supply houses Before balsa tissue came staples American modeling spruce commonly used woodbut white pine holly cedar poplar basswood reed also popular Bamboo came 30-in lengths standard allpurpose wood best bamboo Tonkin variety interior China named after shipping port what Indo-China Balsa modeling material dis covered New York City docks 1911 John Carisi prominent member New York Model Aero Club came South America used pack expensive mahogany logs shipped deck cargo Soft wormy balsa lacked quality control enjoy today New York group used motor sticks props plan model using balsa appeared Aeronautics 1913 1918 Chicago modelers using wood Nevertheless hard find long time obtain club leader usually purchased rough planks cut meet club needs remember seeing first balsa arrive Milwaukee 1928 came band-sawed sheets 6 x 36 normal pro cedure time shape own strips sand crude sheet thickness needed 1930 however fair variety cut balsa available both stock packaged kits supply houses also carried variety small gears ball bearing prop shafts aluminum-disc wire-spoked wheels rubber tires well other small hardware like egg-beater winders Interestingly enough two modelbuilding staples supply houses carried came hobby way casket manufacturing industry cellulose cement dope China silk Both materials originally used casket-making Amberoid 1911 spell ing usual cement Clear nitrate Best New Design Award Sun Fun Lakeland Florida Features 1/4 Scale 90 span 4 cycle 45 2 cycle 40 Plans $1750 ppd Dry Ridge Models 59 McCurry Rd. Weaverville NC 28787 ** * * * * ** * ** * ************** ***** **** * * ***** 0 BALSA WOOD 72 complete setGLIDER PLANS 0 INEXPEN5IVE 0- EASY TO BUILD __jf \40 FLYING MODELS MOUS AIRCRAFT REPLICAS %zz% 0-RUBBER BAND HAND LAUNCH ADIIA EACH UNIQUE FIT INC TO ORDER COMPLETE STAR KRAFT MADE FRAN I/IA SHEETSET OE PLANSPO BOX 321 BALSA 3/16 STICK BALSASEND 5750 PLUSBOUNTIFUL UT 84010 USC LESS THAN ONE SHEET$150 POSTAGE TO AND ANF 551 IE FF6 MODEL I 17 DIFFERENT PLANS INCLUDING F-isF-iS F-18F-4 U-2A-S SPACE SHUTTLE 10 OTHERS September1987 145 TWIN STAR Newest Opposed Twin 2-Cycle Low Price Weighs Only 27 Lbs* first own brand new lightweights Peoples Republic China just arrived U S Simultaneous firing minimizes vibration Massive crankshaft riding double ball bearings increases performance reduces maintenance Youll have fly believe EHS TRADING would like thank IMAA hospitality during RALLY OF GIANTS 87 Converse Indiana EHS TRADING LTD information contact PO Box 4325 RNa PiB Introductory PRICE 995* WItHOUT MUFFLER 400 Hualani St Bldg 13E Hilo Hawaii 96720Phone 800-634-6229 x 634486 EHS UW j- KITTEN ULTRALIGHT 1