SAM RULES printed AMA rule book require minimum 225 sq area 10 Cu engine displacement effort strike balance between screamers floaters majority pre- 1942 designs must either scaled up down reach required 900 sq use popular 40size engines months feature model exception Riser Rider has slightly over minimum area handles power very well Joe Percy Fort Worth has powered K&B 65 cc create model possessed astounding climb slow lazy glide privilege observing Joes creation South western Regionals Ft Worth am highly impressed glide dead flat sink rate almost negligible model seemingly will stop mid-air hanging like parachute rides lift very well showing little tendency tighten up fall out thermal Joe developed alternate sheet ribs rather sliced ones Both shown drawings Although structure appears dif ficult construct Joe assures us curved spars symmetrical stabilizer section unusual highly effective according Joe currently completing 1350 sq enlargement 60 power should something else Interestingly Joe Percy represents typical convert RC Assist has building freeflight over 35 years yet caught RC bug recently Joe won Novice Old Timer first Ive seen event whale good idea certainly speaks volumes about ease flying inherent designs Joe came aspect hobby physical limita tions reduced thrill retrieving agony de feet As said else can ride thermal long want chasing next county Editors Note Doc asks us fill Marquardts background pleasure have met Roy probably Detroit pre-war Nats flew three Riser Riders Roy modelers made good big way aircraft industry having number-one company fieldramjets During 1950s emphasis defense missiles ramiets big sure whether Roy sold Out retired perhaps well hear him some friends Oshkosh Gosh annual pilgrimage Oshkosh once again pointed Out remarkable kinship between AMA members EAA designers builders homebuilts 9 ROY MARQUADTS _RISER RIDER DEVELOPED BY JOE PERCY FOR RC -SPAN 75 LENGTH 510 AREA 400 SO IN FSAM LEGAL FOR 65cc 4Oiri3 O 2 4 6 8 0 have roots model aviation example Pete Bowers has several model designs mags As matter fact original Fly Baby free-flight published MAN 1942 Editors Note David Haughts CL Fly Baby very niceappeared May 78 MA Little wonder Fly Baby homebuilt resembles giant model airplane Frequently home-build ers restorers delighted learn visiting fellow modelers display line extremely cooperative providing assis tance interested developing scale models aircraft wide commonality materials techniques always evident construction EAA AMA aircraft years demonstrations new hot-wire foam-cutting techniques drew z C C z C -j w w large crowds war replicas Rands Variez Quicky other designs constructed poly-urethane foam epoxied onto wooden frames covered Dynel Hobbypoxy EZ Doesit cloth finished micro-balloons resin Ultra-fright term powered hanggliders covered same acetate dress liner use old timers American Eaglet powered glider utilizes 3-in Du-Bro wheels music wire wing tip out-riggers have never attended fly-in BAA grounds buildings immaculate crowds immense evening air show superior displays commercial homebuilt tique classic warbird aircraft absolutely mind boggling Much continued success Continued page 126 Although played no spectacular part free flight stage prior WW II Roy Marquardts Riser Rider excellent airplane Marquardt went found number ramiet production facility nation during 1950s Picture shows Joe Percy Riser Rider Powered K&B 65 cc its fine climb glide impressed Doc Southwestern Regionals Fort Worth February 1980 33 62 Sport Scale 3-4 channels 1911 AVRO D Worlds First Tractor Biplane Kit includes wing-warping cable-operated elevator rudder winy-building jig quick assembly wing panels pilot passenger heads written instroctions 15 x 20 decal sheet Pre-printed sheet metal parts Rigging fittings PLANS 135 x 50 designed poster displaying lull size profile perspective assembly drawings portrait brief history AV Roe IY Second sheet full size working plan detail construction drawings George Marsden 7621 Mary Cassaft Drive AEOBATIC AiRPLANES BY ROBT C MORRISON 19 SUPERB DRAWINGS 8395 us SOW POSTAC LOG S $100 appropriate side rudder Vary length get less tab effect thick built-up rudder section makes model fairly insensitive rudder tab adjustments makes easy fine-tune pattern liking trim method use similar used FM Power models obtain righf/right pattern complication auto-surfaces Thrust adjustments effective low speeds first few seconds after launch wing wash-in gives left roll tendency during right climb Rudder tab used correct later stages power pattern Youll probably end up slight amount left thrust plus some right rudder tab warps correct power pattern want get should straight climb about three seconds gradually changing right climb making about complete turn nine seconds model goes round round making too turns take out incidence straighten out speed up climb model climbs too straight up tends go left end power pattern add right tab stalls doesnt recover quickly engine cuts add incidence power pattern set check glide again Add weight rear fuselage until model stalls slightly glide remove bit youve achieved desired power pattern dont tilt stab change glide circle since will affect incident setting maybe mess up carefully-trimmed power pattern Instead add shims wing rails tilt wing glide circle should give about complete circle 40 seconds calm weather Tighten about 30 seconds wind comes up KIT $9400 PLANS $3000 Potomac Maryland 20854 GET ORGANIZED l-lee s set 0t4 stady Nes holds Doe 4 years tao8e 8 agaza1ea 4 MAG FILES $495 Send 5496 p1w SI 00 postage handeig DOU INOUSTRES PO BOX 386-K DOVER NH 08620 KITSO PLANS SACCESSORIES BABY ACE , P-Nur set N 8EAEtNGS ROWN CO-S ENGINES L JAPANESE tISSUE-PROPS 17 SPAN COMPLETE CATALOG $1001 KIT S449 MANY HARD SO FIND ItEMS Peek-hjaes BOX 2493-AMLA MESA CALIF 92041 CL Scale/Gretz continued page 54 quality lumber obtained can vary enor mously Densities can vary four pounds 20 pounds per cubic foot Eight- 12-pound baisa considered medium average weight Six pound less consideredcontest grade Logically should select lightest softest grades lightly stressed parts structure block wing tips sheet tail surfaces etc heavier hard grades wing spars fuselage longerons Grain direction important consideration primarily selection sheet balsa way grain runs through sheet largely controls its rigidity flexibility example sheet cut log trees annular rings run across thickness sheet A-grain tangent cut sheet will fairly flexible edge edge fact after soaking water some tangentcut sheets can completely rolled tube shape splitting other hand sheet cut annular rings running through thickness sheet C-grain quarter grain sheet will very rigid edge edge cannot bent splitting sheet called random cut B-grain grain direction less clearly defined sheet will have intermedi ate properties between C grain ac companying chart illustrates three basic grain types sheet balsa lists appropriate uses Remember selecting sheet balsa grain direction weight should unrelated consider ations can find light heavy A-grain light heavy B-grain light heavy C-grain Grain direction controls stifihess weight Mike Gretz Box 162 Montezuma IA 50171 RC Old Timers/Mathews continued page 33 Oshkosh happening stems perma nent site has constantly improved long-term lease agreement absolute assurance knowing what expect motel rneai arrangements before one-even arrives should perhaps consider EAA example re-evaluate own annual national con vention Omaha Nats rest contes tants 79 Nats flew either Lincoln Mead Nebraska RC Old Timers went far west edge Omaha site City Park overlooking lake neatly mowed grass surrounding directions Truly lovely site field placed crest flattened-off hill panoramic view surrounding countryside Although hardiy ideal way demonstrate thing public interested contestants other events attended rewarded lovely day friendly group mingle Although entry size rather disappoint ing calibre competition high several well-developed models above average times recorded John Pond writer demon strated brilliant minds required writing column John launched Dallaire receiver off locked keys car trunk Smart spite greatly enjoyed hospitality extended locals would gladly fly place another time beautiful Bill Berkely Models Effinger recently related something worth sharing first gas model built scale Buhi Pup Editor big like todays ers built removable wings bracing easy transportation built model ever seeing gas model Come think it likely first sca gas modeL six-foot span Brown Jr * 187 climbed like rocket took 1000 feet pull out engine quit. must have traveled 80 mph Transportation problem under 18 didnt have drivers license Taking model subway ferry bus trolley finally airport experience Mr Effinger recalling 1936 New York City lived Brooklyn says flying site problems something new Somehow want fly models always figure way Fast Richard Runs Behindi hope include brief overviews manufacturers lines Old Timer-oriented kits powerplants accessories future columns folks business invited advise what have Well start Dick Mathis Design Group formerly M&P Lone Oak Texas 75453_Fast Richards kit line includes Flying Quaker 84 Quaker 54 reduced size opposed Quaker Flash see MA 8-78 Dallaire 108 Comet Clipper has recently returned S M U complete PhD teaching fellowship running behind deliveries Clipper Dick advises anyone has made deposit refunds will made cannot wait early 1980 delivery plan kit review Carl Goldberg classic cabin job soon should pure delight Dick vivacious wife Mary K con templating adding 900 sq scaled-down Dallaire line watched several perform Ft Worth predict Dallaire Jr combined 40-size engine will 126 Model Aviation L ting advertisers mention read about Model Aviation .. . ..... . :::......C:::: ...:: %VVnrnVV. ; %vJyen---rn. . .. Plan now attend unquestionably worlds greatest radio control show Open public three great days Presented Weak Signals R/C Club 20 Box 5772 Toledo Ohio 43613 April FRIDAY9 am 6 pm SATURDAY9am 6pm SUNDAY9 am 430 pm prove highly popular Can Call SAM Bill Rauch 1730 Gunwood Place Crofton MD 21114 trying contact Old Timer fliers DC area hopes forming SAM chapter Prince Georges RC Club also considering scheduling RC Texaco event next spring closet old-timers get touch Bill After social event Great Bolts Lightning running converted-to-ignition engine using L&L Elec tronics *301 Electronic Ignition system Al though primarily intended use Quadra similar chain-saw magneto-ignition engines unit fires fantastic spark provides improved starting smoother running used make-and-break ignition system re chargeable sealed lead-acid battery certainly rep resents improvement over pair D cells plastic Megow battery sleeve remember really significant news no radio interference has encountered used Pro Line Cannon equipment position evaluate L&L system using other radio brands would greatly appreciate hearing anyone using other equipment price unit certainly reasonable could well represent significant breakthrough per plexing interference can worms L&L Elec tronics PO Box 13434 Albuquerque NM 87112 spectrum interference spark ignition seemingly insane flier can get nothing lead foil firewall another will able fly transistorized ignition would immensely helpful some would write article subject language non-electronic types can understand Hint Hint Editor Vernon Macnabb cant remember value details Citizenship 1948 test flew 465 system ignition us place resistor Dee B Mathews 506 S Walnu4 Greensbutg something high-tension lead works KS 67054 i1iouYe decoratsn9 Does mean qoure crashin3 less February 1980 127
Edition: Model Aviation - 1980/02
Page Numbers: 33, 126, 127
SAM RULES printed AMA rule book require minimum 225 sq area 10 Cu engine displacement effort strike balance between screamers floaters majority pre- 1942 designs must either scaled up down reach required 900 sq use popular 40size engines months feature model exception Riser Rider has slightly over minimum area handles power very well Joe Percy Fort Worth has powered K&B 65 cc create model possessed astounding climb slow lazy glide privilege observing Joes creation South western Regionals Ft Worth am highly impressed glide dead flat sink rate almost negligible model seemingly will stop mid-air hanging like parachute rides lift very well showing little tendency tighten up fall out thermal Joe developed alternate sheet ribs rather sliced ones Both shown drawings Although structure appears dif ficult construct Joe assures us curved spars symmetrical stabilizer section unusual highly effective according Joe currently completing 1350 sq enlargement 60 power should something else Interestingly Joe Percy represents typical convert RC Assist has building freeflight over 35 years yet caught RC bug recently Joe won Novice Old Timer first Ive seen event whale good idea certainly speaks volumes about ease flying inherent designs Joe came aspect hobby physical limita tions reduced thrill retrieving agony de feet As said else can ride thermal long want chasing next county Editors Note Doc asks us fill Marquardts background pleasure have met Roy probably Detroit pre-war Nats flew three Riser Riders Roy modelers made good big way aircraft industry having number-one company fieldramjets During 1950s emphasis defense missiles ramiets big sure whether Roy sold Out retired perhaps well hear him some friends Oshkosh Gosh annual pilgrimage Oshkosh once again pointed Out remarkable kinship between AMA members EAA designers builders homebuilts 9 ROY MARQUADTS _RISER RIDER DEVELOPED BY JOE PERCY FOR RC -SPAN 75 LENGTH 510 AREA 400 SO IN FSAM LEGAL FOR 65cc 4Oiri3 O 2 4 6 8 0 have roots model aviation example Pete Bowers has several model designs mags As matter fact original Fly Baby free-flight published MAN 1942 Editors Note David Haughts CL Fly Baby very niceappeared May 78 MA Little wonder Fly Baby homebuilt resembles giant model airplane Frequently home-build ers restorers delighted learn visiting fellow modelers display line extremely cooperative providing assis tance interested developing scale models aircraft wide commonality materials techniques always evident construction EAA AMA aircraft years demonstrations new hot-wire foam-cutting techniques drew z C C z C -j w w large crowds war replicas Rands Variez Quicky other designs constructed poly-urethane foam epoxied onto wooden frames covered Dynel Hobbypoxy EZ Doesit cloth finished micro-balloons resin Ultra-fright term powered hanggliders covered same acetate dress liner use old timers American Eaglet powered glider utilizes 3-in Du-Bro wheels music wire wing tip out-riggers have never attended fly-in BAA grounds buildings immaculate crowds immense evening air show superior displays commercial homebuilt tique classic warbird aircraft absolutely mind boggling Much continued success Continued page 126 Although played no spectacular part free flight stage prior WW II Roy Marquardts Riser Rider excellent airplane Marquardt went found number ramiet production facility nation during 1950s Picture shows Joe Percy Riser Rider Powered K&B 65 cc its fine climb glide impressed Doc Southwestern Regionals Fort Worth February 1980 33 62 Sport Scale 3-4 channels 1911 AVRO D Worlds First Tractor Biplane Kit includes wing-warping cable-operated elevator rudder winy-building jig quick assembly wing panels pilot passenger heads written instroctions 15 x 20 decal sheet Pre-printed sheet metal parts Rigging fittings PLANS 135 x 50 designed poster displaying lull size profile perspective assembly drawings portrait brief history AV Roe IY Second sheet full size working plan detail construction drawings George Marsden 7621 Mary Cassaft Drive AEOBATIC AiRPLANES BY ROBT C MORRISON 19 SUPERB DRAWINGS 8395 us SOW POSTAC LOG S $100 appropriate side rudder Vary length get less tab effect thick built-up rudder section makes model fairly insensitive rudder tab adjustments makes easy fine-tune pattern liking trim method use similar used FM Power models obtain righf/right pattern complication auto-surfaces Thrust adjustments effective low speeds first few seconds after launch wing wash-in gives left roll tendency during right climb Rudder tab used correct later stages power pattern Youll probably end up slight amount left thrust plus some right rudder tab warps correct power pattern want get should straight climb about three seconds gradually changing right climb making about complete turn nine seconds model goes round round making too turns take out incidence straighten out speed up climb model climbs too straight up tends go left end power pattern add right tab stalls doesnt recover quickly engine cuts add incidence power pattern set check glide again Add weight rear fuselage until model stalls slightly glide remove bit youve achieved desired power pattern dont tilt stab change glide circle since will affect incident setting maybe mess up carefully-trimmed power pattern Instead add shims wing rails tilt wing glide circle should give about complete circle 40 seconds calm weather Tighten about 30 seconds wind comes up KIT $9400 PLANS $3000 Potomac Maryland 20854 GET ORGANIZED l-lee s set 0t4 stady Nes holds Doe 4 years tao8e 8 agaza1ea 4 MAG FILES $495 Send 5496 p1w SI 00 postage handeig DOU INOUSTRES PO BOX 386-K DOVER NH 08620 KITSO PLANS SACCESSORIES BABY ACE , P-Nur set N 8EAEtNGS ROWN CO-S ENGINES L JAPANESE tISSUE-PROPS 17 SPAN COMPLETE CATALOG $1001 KIT S449 MANY HARD SO FIND ItEMS Peek-hjaes BOX 2493-AMLA MESA CALIF 92041 CL Scale/Gretz continued page 54 quality lumber obtained can vary enor mously Densities can vary four pounds 20 pounds per cubic foot Eight- 12-pound baisa considered medium average weight Six pound less consideredcontest grade Logically should select lightest softest grades lightly stressed parts structure block wing tips sheet tail surfaces etc heavier hard grades wing spars fuselage longerons Grain direction important consideration primarily selection sheet balsa way grain runs through sheet largely controls its rigidity flexibility example sheet cut log trees annular rings run across thickness sheet A-grain tangent cut sheet will fairly flexible edge edge fact after soaking water some tangentcut sheets can completely rolled tube shape splitting other hand sheet cut annular rings running through thickness sheet C-grain quarter grain sheet will very rigid edge edge cannot bent splitting sheet called random cut B-grain grain direction less clearly defined sheet will have intermedi ate properties between C grain ac companying chart illustrates three basic grain types sheet balsa lists appropriate uses Remember selecting sheet balsa grain direction weight should unrelated consider ations can find light heavy A-grain light heavy B-grain light heavy C-grain Grain direction controls stifihess weight Mike Gretz Box 162 Montezuma IA 50171 RC Old Timers/Mathews continued page 33 Oshkosh happening stems perma nent site has constantly improved long-term lease agreement absolute assurance knowing what expect motel rneai arrangements before one-even arrives should perhaps consider EAA example re-evaluate own annual national con vention Omaha Nats rest contes tants 79 Nats flew either Lincoln Mead Nebraska RC Old Timers went far west edge Omaha site City Park overlooking lake neatly mowed grass surrounding directions Truly lovely site field placed crest flattened-off hill panoramic view surrounding countryside Although hardiy ideal way demonstrate thing public interested contestants other events attended rewarded lovely day friendly group mingle Although entry size rather disappoint ing calibre competition high several well-developed models above average times recorded John Pond writer demon strated brilliant minds required writing column John launched Dallaire receiver off locked keys car trunk Smart spite greatly enjoyed hospitality extended locals would gladly fly place another time beautiful Bill Berkely Models Effinger recently related something worth sharing first gas model built scale Buhi Pup Editor big like todays ers built removable wings bracing easy transportation built model ever seeing gas model Come think it likely first sca gas modeL six-foot span Brown Jr * 187 climbed like rocket took 1000 feet pull out engine quit. must have traveled 80 mph Transportation problem under 18 didnt have drivers license Taking model subway ferry bus trolley finally airport experience Mr Effinger recalling 1936 New York City lived Brooklyn says flying site problems something new Somehow want fly models always figure way Fast Richard Runs Behindi hope include brief overviews manufacturers lines Old Timer-oriented kits powerplants accessories future columns folks business invited advise what have Well start Dick Mathis Design Group formerly M&P Lone Oak Texas 75453_Fast Richards kit line includes Flying Quaker 84 Quaker 54 reduced size opposed Quaker Flash see MA 8-78 Dallaire 108 Comet Clipper has recently returned S M U complete PhD teaching fellowship running behind deliveries Clipper Dick advises anyone has made deposit refunds will made cannot wait early 1980 delivery plan kit review Carl Goldberg classic cabin job soon should pure delight Dick vivacious wife Mary K con templating adding 900 sq scaled-down Dallaire line watched several perform Ft Worth predict Dallaire Jr combined 40-size engine will 126 Model Aviation L ting advertisers mention read about Model Aviation .. . ..... . :::......C:::: ...:: %VVnrnVV. ; %vJyen---rn. . .. Plan now attend unquestionably worlds greatest radio control show Open public three great days Presented Weak Signals R/C Club 20 Box 5772 Toledo Ohio 43613 April FRIDAY9 am 6 pm SATURDAY9am 6pm SUNDAY9 am 430 pm prove highly popular Can Call SAM Bill Rauch 1730 Gunwood Place Crofton MD 21114 trying contact Old Timer fliers DC area hopes forming SAM chapter Prince Georges RC Club also considering scheduling RC Texaco event next spring closet old-timers get touch Bill After social event Great Bolts Lightning running converted-to-ignition engine using L&L Elec tronics *301 Electronic Ignition system Al though primarily intended use Quadra similar chain-saw magneto-ignition engines unit fires fantastic spark provides improved starting smoother running used make-and-break ignition system re chargeable sealed lead-acid battery certainly rep resents improvement over pair D cells plastic Megow battery sleeve remember really significant news no radio interference has encountered used Pro Line Cannon equipment position evaluate L&L system using other radio brands would greatly appreciate hearing anyone using other equipment price unit certainly reasonable could well represent significant breakthrough per plexing interference can worms L&L Elec tronics PO Box 13434 Albuquerque NM 87112 spectrum interference spark ignition seemingly insane flier can get nothing lead foil firewall another will able fly transistorized ignition would immensely helpful some would write article subject language non-electronic types can understand Hint Hint Editor Vernon Macnabb cant remember value details Citizenship 1948 test flew 465 system ignition us place resistor Dee B Mathews 506 S Walnu4 Greensbutg something high-tension lead works KS 67054 i1iouYe decoratsn9 Does mean qoure crashin3 less February 1980 127
Edition: Model Aviation - 1980/02
Page Numbers: 33, 126, 127
SAM RULES printed AMA rule book require minimum 225 sq area 10 Cu engine displacement effort strike balance between screamers floaters majority pre- 1942 designs must either scaled up down reach required 900 sq use popular 40size engines months feature model exception Riser Rider has slightly over minimum area handles power very well Joe Percy Fort Worth has powered K&B 65 cc create model possessed astounding climb slow lazy glide privilege observing Joes creation South western Regionals Ft Worth am highly impressed glide dead flat sink rate almost negligible model seemingly will stop mid-air hanging like parachute rides lift very well showing little tendency tighten up fall out thermal Joe developed alternate sheet ribs rather sliced ones Both shown drawings Although structure appears dif ficult construct Joe assures us curved spars symmetrical stabilizer section unusual highly effective according Joe currently completing 1350 sq enlargement 60 power should something else Interestingly Joe Percy represents typical convert RC Assist has building freeflight over 35 years yet caught RC bug recently Joe won Novice Old Timer first Ive seen event whale good idea certainly speaks volumes about ease flying inherent designs Joe came aspect hobby physical limita tions reduced thrill retrieving agony de feet As said else can ride thermal long want chasing next county Editors Note Doc asks us fill Marquardts background pleasure have met Roy probably Detroit pre-war Nats flew three Riser Riders Roy modelers made good big way aircraft industry having number-one company fieldramjets During 1950s emphasis defense missiles ramiets big sure whether Roy sold Out retired perhaps well hear him some friends Oshkosh Gosh annual pilgrimage Oshkosh once again pointed Out remarkable kinship between AMA members EAA designers builders homebuilts 9 ROY MARQUADTS _RISER RIDER DEVELOPED BY JOE PERCY FOR RC -SPAN 75 LENGTH 510 AREA 400 SO IN FSAM LEGAL FOR 65cc 4Oiri3 O 2 4 6 8 0 have roots model aviation example Pete Bowers has several model designs mags As matter fact original Fly Baby free-flight published MAN 1942 Editors Note David Haughts CL Fly Baby very niceappeared May 78 MA Little wonder Fly Baby homebuilt resembles giant model airplane Frequently home-build ers restorers delighted learn visiting fellow modelers display line extremely cooperative providing assis tance interested developing scale models aircraft wide commonality materials techniques always evident construction EAA AMA aircraft years demonstrations new hot-wire foam-cutting techniques drew z C C z C -j w w large crowds war replicas Rands Variez Quicky other designs constructed poly-urethane foam epoxied onto wooden frames covered Dynel Hobbypoxy EZ Doesit cloth finished micro-balloons resin Ultra-fright term powered hanggliders covered same acetate dress liner use old timers American Eaglet powered glider utilizes 3-in Du-Bro wheels music wire wing tip out-riggers have never attended fly-in BAA grounds buildings immaculate crowds immense evening air show superior displays commercial homebuilt tique classic warbird aircraft absolutely mind boggling Much continued success Continued page 126 Although played no spectacular part free flight stage prior WW II Roy Marquardts Riser Rider excellent airplane Marquardt went found number ramiet production facility nation during 1950s Picture shows Joe Percy Riser Rider Powered K&B 65 cc its fine climb glide impressed Doc Southwestern Regionals Fort Worth February 1980 33 62 Sport Scale 3-4 channels 1911 AVRO D Worlds First Tractor Biplane Kit includes wing-warping cable-operated elevator rudder winy-building jig quick assembly wing panels pilot passenger heads written instroctions 15 x 20 decal sheet Pre-printed sheet metal parts Rigging fittings PLANS 135 x 50 designed poster displaying lull size profile perspective assembly drawings portrait brief history AV Roe IY Second sheet full size working plan detail construction drawings George Marsden 7621 Mary Cassaft Drive AEOBATIC AiRPLANES BY ROBT C MORRISON 19 SUPERB DRAWINGS 8395 us SOW POSTAC LOG S $100 appropriate side rudder Vary length get less tab effect thick built-up rudder section makes model fairly insensitive rudder tab adjustments makes easy fine-tune pattern liking trim method use similar used FM Power models obtain righf/right pattern complication auto-surfaces Thrust adjustments effective low speeds first few seconds after launch wing wash-in gives left roll tendency during right climb Rudder tab used correct later stages power pattern Youll probably end up slight amount left thrust plus some right rudder tab warps correct power pattern want get should straight climb about three seconds gradually changing right climb making about complete turn nine seconds model goes round round making too turns take out incidence straighten out speed up climb model climbs too straight up tends go left end power pattern add right tab stalls doesnt recover quickly engine cuts add incidence power pattern set check glide again Add weight rear fuselage until model stalls slightly glide remove bit youve achieved desired power pattern dont tilt stab change glide circle since will affect incident setting maybe mess up carefully-trimmed power pattern Instead add shims wing rails tilt wing glide circle should give about complete circle 40 seconds calm weather Tighten about 30 seconds wind comes up KIT $9400 PLANS $3000 Potomac Maryland 20854 GET ORGANIZED l-lee s set 0t4 stady Nes holds Doe 4 years tao8e 8 agaza1ea 4 MAG FILES $495 Send 5496 p1w SI 00 postage handeig DOU INOUSTRES PO BOX 386-K DOVER NH 08620 KITSO PLANS SACCESSORIES BABY ACE , P-Nur set N 8EAEtNGS ROWN CO-S ENGINES L JAPANESE tISSUE-PROPS 17 SPAN COMPLETE CATALOG $1001 KIT S449 MANY HARD SO FIND ItEMS Peek-hjaes BOX 2493-AMLA MESA CALIF 92041 CL Scale/Gretz continued page 54 quality lumber obtained can vary enor mously Densities can vary four pounds 20 pounds per cubic foot Eight- 12-pound baisa considered medium average weight Six pound less consideredcontest grade Logically should select lightest softest grades lightly stressed parts structure block wing tips sheet tail surfaces etc heavier hard grades wing spars fuselage longerons Grain direction important consideration primarily selection sheet balsa way grain runs through sheet largely controls its rigidity flexibility example sheet cut log trees annular rings run across thickness sheet A-grain tangent cut sheet will fairly flexible edge edge fact after soaking water some tangentcut sheets can completely rolled tube shape splitting other hand sheet cut annular rings running through thickness sheet C-grain quarter grain sheet will very rigid edge edge cannot bent splitting sheet called random cut B-grain grain direction less clearly defined sheet will have intermedi ate properties between C grain ac companying chart illustrates three basic grain types sheet balsa lists appropriate uses Remember selecting sheet balsa grain direction weight should unrelated consider ations can find light heavy A-grain light heavy B-grain light heavy C-grain Grain direction controls stifihess weight Mike Gretz Box 162 Montezuma IA 50171 RC Old Timers/Mathews continued page 33 Oshkosh happening stems perma nent site has constantly improved long-term lease agreement absolute assurance knowing what expect motel rneai arrangements before one-even arrives should perhaps consider EAA example re-evaluate own annual national con vention Omaha Nats rest contes tants 79 Nats flew either Lincoln Mead Nebraska RC Old Timers went far west edge Omaha site City Park overlooking lake neatly mowed grass surrounding directions Truly lovely site field placed crest flattened-off hill panoramic view surrounding countryside Although hardiy ideal way demonstrate thing public interested contestants other events attended rewarded lovely day friendly group mingle Although entry size rather disappoint ing calibre competition high several well-developed models above average times recorded John Pond writer demon strated brilliant minds required writing column John launched Dallaire receiver off locked keys car trunk Smart spite greatly enjoyed hospitality extended locals would gladly fly place another time beautiful Bill Berkely Models Effinger recently related something worth sharing first gas model built scale Buhi Pup Editor big like todays ers built removable wings bracing easy transportation built model ever seeing gas model Come think it likely first sca gas modeL six-foot span Brown Jr * 187 climbed like rocket took 1000 feet pull out engine quit. must have traveled 80 mph Transportation problem under 18 didnt have drivers license Taking model subway ferry bus trolley finally airport experience Mr Effinger recalling 1936 New York City lived Brooklyn says flying site problems something new Somehow want fly models always figure way Fast Richard Runs Behindi hope include brief overviews manufacturers lines Old Timer-oriented kits powerplants accessories future columns folks business invited advise what have Well start Dick Mathis Design Group formerly M&P Lone Oak Texas 75453_Fast Richards kit line includes Flying Quaker 84 Quaker 54 reduced size opposed Quaker Flash see MA 8-78 Dallaire 108 Comet Clipper has recently returned S M U complete PhD teaching fellowship running behind deliveries Clipper Dick advises anyone has made deposit refunds will made cannot wait early 1980 delivery plan kit review Carl Goldberg classic cabin job soon should pure delight Dick vivacious wife Mary K con templating adding 900 sq scaled-down Dallaire line watched several perform Ft Worth predict Dallaire Jr combined 40-size engine will 126 Model Aviation L ting advertisers mention read about Model Aviation .. . ..... . :::......C:::: ...:: %VVnrnVV. ; %vJyen---rn. . .. Plan now attend unquestionably worlds greatest radio control show Open public three great days Presented Weak Signals R/C Club 20 Box 5772 Toledo Ohio 43613 April FRIDAY9 am 6 pm SATURDAY9am 6pm SUNDAY9 am 430 pm prove highly popular Can Call SAM Bill Rauch 1730 Gunwood Place Crofton MD 21114 trying contact Old Timer fliers DC area hopes forming SAM chapter Prince Georges RC Club also considering scheduling RC Texaco event next spring closet old-timers get touch Bill After social event Great Bolts Lightning running converted-to-ignition engine using L&L Elec tronics *301 Electronic Ignition system Al though primarily intended use Quadra similar chain-saw magneto-ignition engines unit fires fantastic spark provides improved starting smoother running used make-and-break ignition system re chargeable sealed lead-acid battery certainly rep resents improvement over pair D cells plastic Megow battery sleeve remember really significant news no radio interference has encountered used Pro Line Cannon equipment position evaluate L&L system using other radio brands would greatly appreciate hearing anyone using other equipment price unit certainly reasonable could well represent significant breakthrough per plexing interference can worms L&L Elec tronics PO Box 13434 Albuquerque NM 87112 spectrum interference spark ignition seemingly insane flier can get nothing lead foil firewall another will able fly transistorized ignition would immensely helpful some would write article subject language non-electronic types can understand Hint Hint Editor Vernon Macnabb cant remember value details Citizenship 1948 test flew 465 system ignition us place resistor Dee B Mathews 506 S Walnu4 Greensbutg something high-tension lead works KS 67054 i1iouYe decoratsn9 Does mean qoure crashin3 less February 1980 127