LETS assume winters big project going fast-selling new exact scale kit Super Duper Model Company maybe youre going scratch build next master piece plans either own someone elses Regardless track take sooner later end up hobby shop looking through dealers balsa assortment know what size need other us really know what looking equal-size sheets look pretty much same can see subtle qualities give piece character its own two things considered selecting piece sheet woodits weight grain direction unrelated considera tions wide range possible blends what makes balsa wood such unique versatile building material instance its possible find different pieces same size sheetthatare eithera soft lightandflexibleb soft light rigid c hard heavy rigid d hard heavy flexibleand umpteen de grees between learning identify basic types can better select correct piece certain part modeL resulting model can built lighter stronger look better fly better Weight important consideration whether balsa need form sheet stick block strength balsa directly related its weightor density heavier wood stronger harder Contrary some popular opinion balsa fourth fifth lightest wood world Its real suitability model aircraft building comes its out standing strength-to-weight ratio balsa tree very fast growing reaching height 60 90 feet six ten years After time tree begins rot Consequentiy density Continued page 126 BALSA ID CHART FOR MODEL AIRCRAFT BUILDERS Balsa versatile building material use correct type models will light er stronger look better fly better will need three grain types Learn identify strength balsa directly related its den sity heavier wood stronger harder # \3 7jX CROSS SECTION OF BALSA LOG AGRAIN sheet balsa has long fibers show up long grain lines very flexible across sheet bends around curves easily Also warps easily Sometimes called tangent cut DO Use sheet covering rounded fuselages wing leading edges planking fuselages forming tubes strong flexible spars HL glider fuselages DONT Use sheet balsa wings tail surfaces flat fuselage sides ribs formers BGRAIN sheet balsa has some qualities both type type C Grain lines shorter type feels stiffer across sheet general purpose sheet can used jobs Sometimes called random cut DO Use flat fuselage sides trailing edges wing ribs formers planking gradual curves wing leading edge sheeting DONT Use type type C will significantly better job CGRAIN sheet balsa has beautiful mottled appearance very stiff across sheet splits easily used proper ly helps build lightest strongest models Most warp resistant type Sometimes called quarter grain DO Use sheet balsa wings tails flat fuselage sides wing ribs formers trailing edges Best type HL glider wings tails DONT Use curved planking rounded fuselages round tubes HL glider fuselages wing spars 54 Model Aviation II 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
Edition: Model Aviation - 1980/02
Page Numbers: 54, 126
LETS assume winters big project going fast-selling new exact scale kit Super Duper Model Company maybe youre going scratch build next master piece plans either own someone elses Regardless track take sooner later end up hobby shop looking through dealers balsa assortment know what size need other us really know what looking equal-size sheets look pretty much same can see subtle qualities give piece character its own two things considered selecting piece sheet woodits weight grain direction unrelated considera tions wide range possible blends what makes balsa wood such unique versatile building material instance its possible find different pieces same size sheetthatare eithera soft lightandflexibleb soft light rigid c hard heavy rigid d hard heavy flexibleand umpteen de grees between learning identify basic types can better select correct piece certain part modeL resulting model can built lighter stronger look better fly better Weight important consideration whether balsa need form sheet stick block strength balsa directly related its weightor density heavier wood stronger harder Contrary some popular opinion balsa fourth fifth lightest wood world Its real suitability model aircraft building comes its out standing strength-to-weight ratio balsa tree very fast growing reaching height 60 90 feet six ten years After time tree begins rot Consequentiy density Continued page 126 BALSA ID CHART FOR MODEL AIRCRAFT BUILDERS Balsa versatile building material use correct type models will light er stronger look better fly better will need three grain types Learn identify strength balsa directly related its den sity heavier wood stronger harder # \3 7jX CROSS SECTION OF BALSA LOG AGRAIN sheet balsa has long fibers show up long grain lines very flexible across sheet bends around curves easily Also warps easily Sometimes called tangent cut DO Use sheet covering rounded fuselages wing leading edges planking fuselages forming tubes strong flexible spars HL glider fuselages DONT Use sheet balsa wings tail surfaces flat fuselage sides ribs formers BGRAIN sheet balsa has some qualities both type type C Grain lines shorter type feels stiffer across sheet general purpose sheet can used jobs Sometimes called random cut DO Use flat fuselage sides trailing edges wing ribs formers planking gradual curves wing leading edge sheeting DONT Use type type C will significantly better job CGRAIN sheet balsa has beautiful mottled appearance very stiff across sheet splits easily used proper ly helps build lightest strongest models Most warp resistant type Sometimes called quarter grain DO Use sheet balsa wings tails flat fuselage sides wing ribs formers trailing edges Best type HL glider wings tails DONT Use curved planking rounded fuselages round tubes HL glider fuselages wing spars 54 Model Aviation II 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