ree Flight Duration Bob Meuser Model Aviation columists need oc casional vacation Bob Meuser having welldeserved month reliefman Jerry Barnette East Coaster has long-time interest Free Flight Jerry resides Fredricks burg VA Bob Meuser will return next month THE SHADDO KNOWS no great secret successful designs result evolutionary process continuing program eliminating weak aspects refining further desirable John Sites Rockville MD has traveled design-evolution road developing Hand-Launched Glider Shaddo Having built 35 40 buggers over five-year development period Lamont Cranston would agree Johns Shaddo now fully developed competition glider Shaddo s heritage harks back Ron Wittmans Supersweep itself product lengthy evolu tion John began adapting Indorr recordholding design suitable outdoor work flying both 22- 24-in wingspans Several development problems encountered early such inability achieve ahigh altitude launch exact problem/solution develop ment sequence lost history several distinctive features incorporated such clipped undercambered tips Shaddo wing tips product both Johns own philosophy idea used Richard Schreder former modeler champion sailplane pilot/builder HP-series sailplane Schreders idea called Mean Chord Line Tip Theory modifies normal wingtip geome try beginning about half-chord length tip result modification least full-scale sailplane applications increase effective aspect ratio added undercambered section wing tips gradually progressing normal flat-bottomed section fully-undercambered sharp edge tip John decided employ undercamber rather washout reasoning both washout undercambered section would serve same stability purposes stalling later rest wing undercambered section might efficient under normal glide conditions John feels Shaddos unique tip geometry does help increase flight time notes stall does occur can severe normal Another contribution increased flight times may Shaddos undercambered wing tips enclose less wood volume conventional wing hence less tip weight Whatever aerodynamic reasonings result excellent HLG its flying char acteristics outstanding Shaddo has excellent calm air flight times should its Supersweep bloodlines well good windy weather trais John has contest wins under very windy conditions merely shifts center gravity forward just bit Besides ability handle wide range weather condi tions hallmark good design John highly pleased its thermal-hooking capability Shaddo tends center easily light lift Construction typical hand launch -in sheet wing 1/16-in stab 1/32-in rudder fuselage -in hard balsa about 1/32-in Phillips entry leading edge wing wing high-point about 2 5-30% chord Speaking Hand-Launched Gliders brings mind handy trick devised Jerry Murphy Colorado Springs CO bumped Jerry awhile back airport rental car checkin As waiting showed shoebox carrying him Inside ordinary shoebox two Hand-Launched Gliders seems Murphy likes take models along travels business trips fully assembled HLGs akward carry So seemed logical Jerry devise take-apart HandNYLON BOLTS 1/4 BALSA FUSELAGE WINS NYLON GOOMMETS FRONT VIEW OF FUSELAGE NOUL ALIGNMENT STRIPS Launched Glider Jerrys design features removable wing basic method being adaptable HLG Basically fuselage drilled tapped pair nylon bolts tapping can usually done -in balsa fuselage bolt itself threaded fuselage holes case hardened Hot Stuff Murphy uses nylon grommets wing through nylon bolts pass additional alignment security strength triangular fillets glued wing provide snug fit along fuselage system works great Just keep shoebox shoes another gliders dont mix shoes gliders contemporary ironmonger actually ironmonger perhaps aluminummonger would accurate Anyway remember back 1977 Free Flight World Champs Eugeny Verbitsky Russian FAI Power teammates showed up aluminumskinned wings Remember mild flap occuring over latest Soviet coup though recognized being something new FAI technology aluminum wings never really caught chief attribute aluminum-monger ing super stiffness imparted wingincredibly stiff However fairly conservative wing aspect ratios moderate airfoil sections being flown conventional balsasheeted wings stiff enough Since alu minum advantages outweighed extra weight construction hassle new technique did catch ay least American FAI community Carl Bogart having made 1979 US World Champs Power Team began dabbling what 64 Model Aviation Baltimore NBEUB1dIUMIU uu nenu rr game LOOKS like good spot ourto fly Super Cyclone-powered Buzzard Bombshell Old-Timer park ignitionl John Sites looking thermal before launching Shaddo HLG proven high-performance design about text might termed flyoff airplane Part Carls approach staying up long time little no lift available high-aspect-ratio wing very thin airfoil refer Carls design 1979 NFFS Intern ationalPlanbook outstanding publication construc tion problems involved long thin wing especially want fly skinny thing Mach point two becoming omithop ter and/or disaster combat inherent weakness high aspect ratio 131 675-in wing root chord thin airfoil section 612% wing Carl went aluminum skins inboard panels ever stifi Attemps twist wing panels hand near-futile task Carls approach constructing aluminum wing panels preskin sheet balsa 1/16 1/20 balsa wing skins laid smooth flat surface Thinned epoxy applied over balsa 0003-in aluminum put place smooth flat weighted surface placed aluminum Sheet glass works well both top bottom working surfaces preassembled balsa/aluminum skins used sheet wings same manner days yore using conventional wooden leading edge Metal wings have additional maintenance prob lems surface dings broken wings trouble repair metal epoxy add about 10-20 grams finished weight Carl says sure goes higher faster thinking about long thin skinny wings fast FAI Power model might give aluminum try others have like Tom Kerr first alternate 1981 US World Champs Power Team Bob Gutai wont rust hut stay away power lines neat thing about aerodynamics Buckets Johnson calls FAI Power model Centaur Bob Sifleet design Anyone care take wild guess what part country Buckets comes dont change laws physics allowed aerodynamic creation fly yesterday being constant will also allow same similar craetion fly tomorrow fact allows model ers go back through old model magazines confidence old designs will still fly Now aerodynamics errordynamics yesteryear have revalidated what needed good source old model airplane magazines Well may have heard National Air Space Museum Washington DC Besides having fair collection full-scale airplanes NASM also has library over 30000 books 4700 bound periodicals 500000 technical reports archive over 900000 photographs dealing might guess aviation space library periodical collection model airplane magazines including Model Aviation 1976 Model Airplane News Jan 1933 R/C Model Builder Jan 1976 American Modeler/American Aircraft Modeler Oct 1956 Flying Models March 1977 Aero Modeller Good news material accessible NASM may visit library peruse material yourself library staff very helpful adverse us would like browse old model mags NASM Library has Xerox machine available researchers first five copies free dime sheet thereafter will however have sign obtain pass guards desk first floor visit NASM Library area third floor cannot personally make museum may send written request specific material send National Air Space Museum Library Independence Avenue Washington DC 20560 prepared delay response currently two-month backlog NASM Library itself indeed impressive model airplane magazine collec tion unfortunately complete perhaps possible instance Flying Models/Flying Aces very short void comes some magazines like Sig Air Modeler Jr American Modeler titles Continued page 134 1/16 50 LEADING EDGE SPRUCE RUDDR 1/32 K STAB 1/16 3 1/2 FINGER SUPPORT /4 BALSA __ cz DIHEDRAL SLIGHT UNDERCAMBER FROM SECTION C-C TO SHARP EDGE AT TIP II' C C 22 1 A0 OUTDOOR HL GLIDER DESIGNED BY JOHN SITES JAN 1981 July 1981 65 INTRODUCING TRIC LINE CONTROL MODELS p ELECTROLINE MODELS0 FUN PO BOX 2503 SAFE BEVERLY HILLS CA 90213 SEND FOR FREE INFORMATION ON MODEL KITS AND ACCESSORIES QUIET CLEAN EASY TO FLY FAST ASSEMBLY FLYS 15-20 MIN LOW COST available donation Needless say contri butions would greatly appreciated tax deductible Walt says can make seven get five needs out lot bad considering whole operation takes few minutes Peanut Val made method looks great tad heavier made usingWhile subject going back time conventional tacticsAn open invitation has issued Fresno Gas Model Airplane Club quote Novem ber 1939 group people gathered together open area outside Fresno California purpose flying model airplanes statement too earth-shattering itself Banana oil fans have having hard time finding miracle material will welcome word Bill McCombs author Flying Improving Scale ModelAirplanes Bill says try chemical supplier ask either iso amyl acetate common amyl acetate other ainyl acetates sure get recommended advantage has over dope unites fibers tissue adding weight much brushed thinner Additional coats wasted have no further effect after initial reaction tissue non-shrinking qualities banana oil legend aware however best thing floats rubber job several colleagues have learned hard way Thanks help suggestions encour agement Send hints tips pi suggestions Bill Warner 423-C San VicenteBlvd Santa Monico CA 90402 FF Duration/Meuser Continued page 65 presently held go back earliest issues anyone would like contribute collection first write Mimi Scharf director acquistions NASM Library stating what product review product review product review Slope Carrier Slope Associates 2317 N 63rd St Seattle WA 98103 custom-tailored wing bags provide transport storage protection Pat tern Scale Goodyear FAI Sailplanes waterproof heavy nylon k foam internal padding have wrap-around zipperwith two pulls integral handles internal pockets stabilizers Choice colors patterns logos available one- two- multi-piece wings Customer provides templates diagrams other specifications write information Basic price $3995 single-color 9-ft bag Decora tion fee $250 fee logos outsize bags product review product review product review until realize some 41 years ago people have caught big thermal has removed earth now some 41 years later same peoples offspring great-offspring still meeting month same purpose flying model airplanes Granted some models have changed appearance really anymore some modelers have basic looks still wings bodies tails various power types Oh yes now have super engines rpm goes thousands super fuels would make chemist have nightmares rubber-powered models fancy names come halfway around world now some 40 years later can heard awsome sound Super Cykes pulling Carl Goldberg Sailplane banging some old O&R 60 getting Playboy high can May 1940 first Annual club held prizes awarded contestants Trophies ribbons motors kits parts found new homes Everyone entered received some award efforts Now some 41 years later same true now dates flying site have changed year 1981 Annual will held September over twoday period Saturday Sunday 26th 27th planning award some $3000 worth trophies motors kits parts As past 41 years contests have AMA-sanctioned have brought modelers together parts US foreign countries hope past some 1 75 200 entries take part maybe some new old faces will show two days getting-together oldest 0,rS AMAMJ MAS ENTERPRISES 1979-1950SPECIALISTS iN M 5E ONAL CHAMPION Proudly HeadsRC HELICOPTERS tS..LdDP HELl-BOY HEADQUARTERS MJ MAS ENTERPRISES now offering totally tvw service helicopter enthssjastl One-stop shopping yosr R/c Helicopter needs regardless what posre flpingl discoott prices Wo also offtripg free set-up flying instractine yours tht asking Wo hose huilt flown analyzed ostry walor hrand Helicopter avail ohio Oar staff qualified answer questions ranging frow installing train ing gear flying yosr ship inserted GMP Cricket NOW AVAILABLE M J MA5 ENTERPRISES Box 727 Miami FL 33197 Phone 305 255-0658 134 Model Aviation SCHLUTER HELl 60 Size CALL FOR OUR LOW PRICES Schlutar Helicopter Parts Stock Including Pipes Fuselages Etc LOWEST PRICES ,System 80 OVERSEAS DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts Books INSTRUCTIONAL TAPES NOW AVAILABLE Building Trinnsing o Flying Content Flying Novice no Expert Autorotetions selup/Pacnica Flight AMERICAN R/C MANTIS NOW ONLY $11998 5 L oldest modeling Free Flight clubs United States Thanks Russ James Fresno GMAC passing along invitation neighborhood September 26-27 stop have go part $3000 jackpot National Free Flight Society NFFS has just announced recipients Free Flight Hall Fame awards 1981 awards given individuals have contributed different ways development continuity FF model aiplane activities USA throughout world Maxwell Bassett revolution man challenged 1932 rules competition flying model aircraft powered internal com bustion engines events previously flown rubber-powered craft developed successful competition models easily successfully built thousands William L Effinger developer manu facturer tremendous variety award-winning kits can forget mark left hobby Berkeley models Duke Fox developer manufacturer engines priced within financial reach modelers have competitive potential started trend hoC fuels use today Joe Lucas deceased real expert/teacher writer subject model airplanes during 1 920s Chicago area authored columns newspapers magazines also won 1926 1928 Mulvihill event Joe Ott American youth 1930s 1 940s new him aeronautical expert Model kits made company could found hobby shops hardware stores dime stores etc Developer simplified model-assembly techniques awards will made NFFS 1981 AMA Nationals Seguin TX August 6 730 pm FF Indoor/Tenny Continued page 66 Bock Indoor models appears stiff ness rather ultimate strength may well important balsa build Indoor models largely true However con sider model never shrug offmore stress imposed flight loads could built very lightly very us have touch needed handle Indoor model twice strong needs could magically appear flight fully wound being touched human hands Another factor type ceiling site condition air super-light very stiff model quite possibly will survive flights under condi tions especially high drift brings out steering balloon problem very stiff structure can rather easily bent beyond its limit during rafter bounce steering attempt usually model shatters Let bend Suppose model bit flexible may well last much longer stiff model So can get flexible model still light strong answer use heavier moredensebalsabelieveitornot Hereshow use example six-pound wood instead four-pound wood make cross section wood enough smaller structure weight same before Now some what simplified since balsa varies density strength overall quality Before cutting spar sheet balsa examine sheet under magnifying glass NORTHERN CALIFORNIAS LARGEST1 DISCOUNT HOBBY SHOPI well FUELyouI New high film strength lubricant creased power engine lifeI Iquality ingredients IJto cut varnish I II II II II II II II II II II II IHOURS Monday thru weonesooy v ju-o ju inursoay C rrioay vJu-auuI L rday930-600 Sunday 1200-500 riD QQ4_ MaiW1735 bqa at04t7SSQ4NEO675QTC695 QUADRAQUADRAQUADRAQUADRAQUADRA INVERTED MII~iEfi UPRIGNT-iNVERTD dNVERTED MUFFLER UPRIGHTINVERTED UPRIGHT MUFFLER TwinTwa TubeeSinai TubeSinale TubTube 2135 OMUET V SCALE INSTRUMENT KITS OIeIOIO 112 di.575 SIIdia750 IlflO die660 330 QMfIT2 2250 QMTTS 30 t 15 MUFFLERS QMIST 30 5 MUFFLERS 2295 Max 302095Max 30US br 31UUbra 91Is. MakI 15 335 MakI 15 1905 a. ea 2005 nuat leading dualem avallabIe ORDER DIRECT Add 10% peetage hanilng CaIN residents add 6% tax Check Cod accepted card number date wIth VISA MASTER CARD
Edition: Model Aviation - 1981/07
Page Numbers: 64, 65, 134, 135
ree Flight Duration Bob Meuser Model Aviation columists need oc casional vacation Bob Meuser having welldeserved month reliefman Jerry Barnette East Coaster has long-time interest Free Flight Jerry resides Fredricks burg VA Bob Meuser will return next month THE SHADDO KNOWS no great secret successful designs result evolutionary process continuing program eliminating weak aspects refining further desirable John Sites Rockville MD has traveled design-evolution road developing Hand-Launched Glider Shaddo Having built 35 40 buggers over five-year development period Lamont Cranston would agree Johns Shaddo now fully developed competition glider Shaddo s heritage harks back Ron Wittmans Supersweep itself product lengthy evolu tion John began adapting Indorr recordholding design suitable outdoor work flying both 22- 24-in wingspans Several development problems encountered early such inability achieve ahigh altitude launch exact problem/solution develop ment sequence lost history several distinctive features incorporated such clipped undercambered tips Shaddo wing tips product both Johns own philosophy idea used Richard Schreder former modeler champion sailplane pilot/builder HP-series sailplane Schreders idea called Mean Chord Line Tip Theory modifies normal wingtip geome try beginning about half-chord length tip result modification least full-scale sailplane applications increase effective aspect ratio added undercambered section wing tips gradually progressing normal flat-bottomed section fully-undercambered sharp edge tip John decided employ undercamber rather washout reasoning both washout undercambered section would serve same stability purposes stalling later rest wing undercambered section might efficient under normal glide conditions John feels Shaddos unique tip geometry does help increase flight time notes stall does occur can severe normal Another contribution increased flight times may Shaddos undercambered wing tips enclose less wood volume conventional wing hence less tip weight Whatever aerodynamic reasonings result excellent HLG its flying char acteristics outstanding Shaddo has excellent calm air flight times should its Supersweep bloodlines well good windy weather trais John has contest wins under very windy conditions merely shifts center gravity forward just bit Besides ability handle wide range weather condi tions hallmark good design John highly pleased its thermal-hooking capability Shaddo tends center easily light lift Construction typical hand launch -in sheet wing 1/16-in stab 1/32-in rudder fuselage -in hard balsa about 1/32-in Phillips entry leading edge wing wing high-point about 2 5-30% chord Speaking Hand-Launched Gliders brings mind handy trick devised Jerry Murphy Colorado Springs CO bumped Jerry awhile back airport rental car checkin As waiting showed shoebox carrying him Inside ordinary shoebox two Hand-Launched Gliders seems Murphy likes take models along travels business trips fully assembled HLGs akward carry So seemed logical Jerry devise take-apart HandNYLON BOLTS 1/4 BALSA FUSELAGE WINS NYLON GOOMMETS FRONT VIEW OF FUSELAGE NOUL ALIGNMENT STRIPS Launched Glider Jerrys design features removable wing basic method being adaptable HLG Basically fuselage drilled tapped pair nylon bolts tapping can usually done -in balsa fuselage bolt itself threaded fuselage holes case hardened Hot Stuff Murphy uses nylon grommets wing through nylon bolts pass additional alignment security strength triangular fillets glued wing provide snug fit along fuselage system works great Just keep shoebox shoes another gliders dont mix shoes gliders contemporary ironmonger actually ironmonger perhaps aluminummonger would accurate Anyway remember back 1977 Free Flight World Champs Eugeny Verbitsky Russian FAI Power teammates showed up aluminumskinned wings Remember mild flap occuring over latest Soviet coup though recognized being something new FAI technology aluminum wings never really caught chief attribute aluminum-monger ing super stiffness imparted wingincredibly stiff However fairly conservative wing aspect ratios moderate airfoil sections being flown conventional balsasheeted wings stiff enough Since alu minum advantages outweighed extra weight construction hassle new technique did catch ay least American FAI community Carl Bogart having made 1979 US World Champs Power Team began dabbling what 64 Model Aviation Baltimore NBEUB1dIUMIU uu nenu rr game LOOKS like good spot ourto fly Super Cyclone-powered Buzzard Bombshell Old-Timer park ignitionl John Sites looking thermal before launching Shaddo HLG proven high-performance design about text might termed flyoff airplane Part Carls approach staying up long time little no lift available high-aspect-ratio wing very thin airfoil refer Carls design 1979 NFFS Intern ationalPlanbook outstanding publication construc tion problems involved long thin wing especially want fly skinny thing Mach point two becoming omithop ter and/or disaster combat inherent weakness high aspect ratio 131 675-in wing root chord thin airfoil section 612% wing Carl went aluminum skins inboard panels ever stifi Attemps twist wing panels hand near-futile task Carls approach constructing aluminum wing panels preskin sheet balsa 1/16 1/20 balsa wing skins laid smooth flat surface Thinned epoxy applied over balsa 0003-in aluminum put place smooth flat weighted surface placed aluminum Sheet glass works well both top bottom working surfaces preassembled balsa/aluminum skins used sheet wings same manner days yore using conventional wooden leading edge Metal wings have additional maintenance prob lems surface dings broken wings trouble repair metal epoxy add about 10-20 grams finished weight Carl says sure goes higher faster thinking about long thin skinny wings fast FAI Power model might give aluminum try others have like Tom Kerr first alternate 1981 US World Champs Power Team Bob Gutai wont rust hut stay away power lines neat thing about aerodynamics Buckets Johnson calls FAI Power model Centaur Bob Sifleet design Anyone care take wild guess what part country Buckets comes dont change laws physics allowed aerodynamic creation fly yesterday being constant will also allow same similar craetion fly tomorrow fact allows model ers go back through old model magazines confidence old designs will still fly Now aerodynamics errordynamics yesteryear have revalidated what needed good source old model airplane magazines Well may have heard National Air Space Museum Washington DC Besides having fair collection full-scale airplanes NASM also has library over 30000 books 4700 bound periodicals 500000 technical reports archive over 900000 photographs dealing might guess aviation space library periodical collection model airplane magazines including Model Aviation 1976 Model Airplane News Jan 1933 R/C Model Builder Jan 1976 American Modeler/American Aircraft Modeler Oct 1956 Flying Models March 1977 Aero Modeller Good news material accessible NASM may visit library peruse material yourself library staff very helpful adverse us would like browse old model mags NASM Library has Xerox machine available researchers first five copies free dime sheet thereafter will however have sign obtain pass guards desk first floor visit NASM Library area third floor cannot personally make museum may send written request specific material send National Air Space Museum Library Independence Avenue Washington DC 20560 prepared delay response currently two-month backlog NASM Library itself indeed impressive model airplane magazine collec tion unfortunately complete perhaps possible instance Flying Models/Flying Aces very short void comes some magazines like Sig Air Modeler Jr American Modeler titles Continued page 134 1/16 50 LEADING EDGE SPRUCE RUDDR 1/32 K STAB 1/16 3 1/2 FINGER SUPPORT /4 BALSA __ cz DIHEDRAL SLIGHT UNDERCAMBER FROM SECTION C-C TO SHARP EDGE AT TIP II' C C 22 1 A0 OUTDOOR HL GLIDER DESIGNED BY JOHN SITES JAN 1981 July 1981 65 INTRODUCING TRIC LINE CONTROL MODELS p ELECTROLINE MODELS0 FUN PO BOX 2503 SAFE BEVERLY HILLS CA 90213 SEND FOR FREE INFORMATION ON MODEL KITS AND ACCESSORIES QUIET CLEAN EASY TO FLY FAST ASSEMBLY FLYS 15-20 MIN LOW COST available donation Needless say contri butions would greatly appreciated tax deductible Walt says can make seven get five needs out lot bad considering whole operation takes few minutes Peanut Val made method looks great tad heavier made usingWhile subject going back time conventional tacticsAn open invitation has issued Fresno Gas Model Airplane Club quote Novem ber 1939 group people gathered together open area outside Fresno California purpose flying model airplanes statement too earth-shattering itself Banana oil fans have having hard time finding miracle material will welcome word Bill McCombs author Flying Improving Scale ModelAirplanes Bill says try chemical supplier ask either iso amyl acetate common amyl acetate other ainyl acetates sure get recommended advantage has over dope unites fibers tissue adding weight much brushed thinner Additional coats wasted have no further effect after initial reaction tissue non-shrinking qualities banana oil legend aware however best thing floats rubber job several colleagues have learned hard way Thanks help suggestions encour agement Send hints tips pi suggestions Bill Warner 423-C San VicenteBlvd Santa Monico CA 90402 FF Duration/Meuser Continued page 65 presently held go back earliest issues anyone would like contribute collection first write Mimi Scharf director acquistions NASM Library stating what product review product review product review Slope Carrier Slope Associates 2317 N 63rd St Seattle WA 98103 custom-tailored wing bags provide transport storage protection Pat tern Scale Goodyear FAI Sailplanes waterproof heavy nylon k foam internal padding have wrap-around zipperwith two pulls integral handles internal pockets stabilizers Choice colors patterns logos available one- two- multi-piece wings Customer provides templates diagrams other specifications write information Basic price $3995 single-color 9-ft bag Decora tion fee $250 fee logos outsize bags product review product review product review until realize some 41 years ago people have caught big thermal has removed earth now some 41 years later same peoples offspring great-offspring still meeting month same purpose flying model airplanes Granted some models have changed appearance really anymore some modelers have basic looks still wings bodies tails various power types Oh yes now have super engines rpm goes thousands super fuels would make chemist have nightmares rubber-powered models fancy names come halfway around world now some 40 years later can heard awsome sound Super Cykes pulling Carl Goldberg Sailplane banging some old O&R 60 getting Playboy high can May 1940 first Annual club held prizes awarded contestants Trophies ribbons motors kits parts found new homes Everyone entered received some award efforts Now some 41 years later same true now dates flying site have changed year 1981 Annual will held September over twoday period Saturday Sunday 26th 27th planning award some $3000 worth trophies motors kits parts As past 41 years contests have AMA-sanctioned have brought modelers together parts US foreign countries hope past some 1 75 200 entries take part maybe some new old faces will show two days getting-together oldest 0,rS AMAMJ MAS ENTERPRISES 1979-1950SPECIALISTS iN M 5E ONAL CHAMPION Proudly HeadsRC HELICOPTERS tS..LdDP HELl-BOY HEADQUARTERS MJ MAS ENTERPRISES now offering totally tvw service helicopter enthssjastl One-stop shopping yosr R/c Helicopter needs regardless what posre flpingl discoott prices Wo also offtripg free set-up flying instractine yours tht asking Wo hose huilt flown analyzed ostry walor hrand Helicopter avail ohio Oar staff qualified answer questions ranging frow installing train ing gear flying yosr ship inserted GMP Cricket NOW AVAILABLE M J MA5 ENTERPRISES Box 727 Miami FL 33197 Phone 305 255-0658 134 Model Aviation SCHLUTER HELl 60 Size CALL FOR OUR LOW PRICES Schlutar Helicopter Parts Stock Including Pipes Fuselages Etc LOWEST PRICES ,System 80 OVERSEAS DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts Books INSTRUCTIONAL TAPES NOW AVAILABLE Building Trinnsing o Flying Content Flying Novice no Expert Autorotetions selup/Pacnica Flight AMERICAN R/C MANTIS NOW ONLY $11998 5 L oldest modeling Free Flight clubs United States Thanks Russ James Fresno GMAC passing along invitation neighborhood September 26-27 stop have go part $3000 jackpot National Free Flight Society NFFS has just announced recipients Free Flight Hall Fame awards 1981 awards given individuals have contributed different ways development continuity FF model aiplane activities USA throughout world Maxwell Bassett revolution man challenged 1932 rules competition flying model aircraft powered internal com bustion engines events previously flown rubber-powered craft developed successful competition models easily successfully built thousands William L Effinger developer manu facturer tremendous variety award-winning kits can forget mark left hobby Berkeley models Duke Fox developer manufacturer engines priced within financial reach modelers have competitive potential started trend hoC fuels use today Joe Lucas deceased real expert/teacher writer subject model airplanes during 1 920s Chicago area authored columns newspapers magazines also won 1926 1928 Mulvihill event Joe Ott American youth 1930s 1 940s new him aeronautical expert Model kits made company could found hobby shops hardware stores dime stores etc Developer simplified model-assembly techniques awards will made NFFS 1981 AMA Nationals Seguin TX August 6 730 pm FF Indoor/Tenny Continued page 66 Bock Indoor models appears stiff ness rather ultimate strength may well important balsa build Indoor models largely true However con sider model never shrug offmore stress imposed flight loads could built very lightly very us have touch needed handle Indoor model twice strong needs could magically appear flight fully wound being touched human hands Another factor type ceiling site condition air super-light very stiff model quite possibly will survive flights under condi tions especially high drift brings out steering balloon problem very stiff structure can rather easily bent beyond its limit during rafter bounce steering attempt usually model shatters Let bend Suppose model bit flexible may well last much longer stiff model So can get flexible model still light strong answer use heavier moredensebalsabelieveitornot Hereshow use example six-pound wood instead four-pound wood make cross section wood enough smaller structure weight same before Now some what simplified since balsa varies density strength overall quality Before cutting spar sheet balsa examine sheet under magnifying glass NORTHERN CALIFORNIAS LARGEST1 DISCOUNT HOBBY SHOPI well FUELyouI New high film strength lubricant creased power engine lifeI Iquality ingredients IJto cut varnish I II II II II II II II II II II II IHOURS Monday thru weonesooy v ju-o ju inursoay C rrioay vJu-auuI L rday930-600 Sunday 1200-500 riD QQ4_ MaiW1735 bqa at04t7SSQ4NEO675QTC695 QUADRAQUADRAQUADRAQUADRAQUADRA INVERTED MII~iEfi UPRIGNT-iNVERTD dNVERTED MUFFLER UPRIGHTINVERTED UPRIGHT MUFFLER TwinTwa TubeeSinai TubeSinale TubTube 2135 OMUET V SCALE INSTRUMENT KITS OIeIOIO 112 di.575 SIIdia750 IlflO die660 330 QMfIT2 2250 QMTTS 30 t 15 MUFFLERS QMIST 30 5 MUFFLERS 2295 Max 302095Max 30US br 31UUbra 91Is. MakI 15 335 MakI 15 1905 a. ea 2005 nuat leading dualem avallabIe ORDER DIRECT Add 10% peetage hanilng CaIN residents add 6% tax Check Cod accepted card number date wIth VISA MASTER CARD
Edition: Model Aviation - 1981/07
Page Numbers: 64, 65, 134, 135
ree Flight Duration Bob Meuser Model Aviation columists need oc casional vacation Bob Meuser having welldeserved month reliefman Jerry Barnette East Coaster has long-time interest Free Flight Jerry resides Fredricks burg VA Bob Meuser will return next month THE SHADDO KNOWS no great secret successful designs result evolutionary process continuing program eliminating weak aspects refining further desirable John Sites Rockville MD has traveled design-evolution road developing Hand-Launched Glider Shaddo Having built 35 40 buggers over five-year development period Lamont Cranston would agree Johns Shaddo now fully developed competition glider Shaddo s heritage harks back Ron Wittmans Supersweep itself product lengthy evolu tion John began adapting Indorr recordholding design suitable outdoor work flying both 22- 24-in wingspans Several development problems encountered early such inability achieve ahigh altitude launch exact problem/solution develop ment sequence lost history several distinctive features incorporated such clipped undercambered tips Shaddo wing tips product both Johns own philosophy idea used Richard Schreder former modeler champion sailplane pilot/builder HP-series sailplane Schreders idea called Mean Chord Line Tip Theory modifies normal wingtip geome try beginning about half-chord length tip result modification least full-scale sailplane applications increase effective aspect ratio added undercambered section wing tips gradually progressing normal flat-bottomed section fully-undercambered sharp edge tip John decided employ undercamber rather washout reasoning both washout undercambered section would serve same stability purposes stalling later rest wing undercambered section might efficient under normal glide conditions John feels Shaddos unique tip geometry does help increase flight time notes stall does occur can severe normal Another contribution increased flight times may Shaddos undercambered wing tips enclose less wood volume conventional wing hence less tip weight Whatever aerodynamic reasonings result excellent HLG its flying char acteristics outstanding Shaddo has excellent calm air flight times should its Supersweep bloodlines well good windy weather trais John has contest wins under very windy conditions merely shifts center gravity forward just bit Besides ability handle wide range weather condi tions hallmark good design John highly pleased its thermal-hooking capability Shaddo tends center easily light lift Construction typical hand launch -in sheet wing 1/16-in stab 1/32-in rudder fuselage -in hard balsa about 1/32-in Phillips entry leading edge wing wing high-point about 2 5-30% chord Speaking Hand-Launched Gliders brings mind handy trick devised Jerry Murphy Colorado Springs CO bumped Jerry awhile back airport rental car checkin As waiting showed shoebox carrying him Inside ordinary shoebox two Hand-Launched Gliders seems Murphy likes take models along travels business trips fully assembled HLGs akward carry So seemed logical Jerry devise take-apart HandNYLON BOLTS 1/4 BALSA FUSELAGE WINS NYLON GOOMMETS FRONT VIEW OF FUSELAGE NOUL ALIGNMENT STRIPS Launched Glider Jerrys design features removable wing basic method being adaptable HLG Basically fuselage drilled tapped pair nylon bolts tapping can usually done -in balsa fuselage bolt itself threaded fuselage holes case hardened Hot Stuff Murphy uses nylon grommets wing through nylon bolts pass additional alignment security strength triangular fillets glued wing provide snug fit along fuselage system works great Just keep shoebox shoes another gliders dont mix shoes gliders contemporary ironmonger actually ironmonger perhaps aluminummonger would accurate Anyway remember back 1977 Free Flight World Champs Eugeny Verbitsky Russian FAI Power teammates showed up aluminumskinned wings Remember mild flap occuring over latest Soviet coup though recognized being something new FAI technology aluminum wings never really caught chief attribute aluminum-monger ing super stiffness imparted wingincredibly stiff However fairly conservative wing aspect ratios moderate airfoil sections being flown conventional balsasheeted wings stiff enough Since alu minum advantages outweighed extra weight construction hassle new technique did catch ay least American FAI community Carl Bogart having made 1979 US World Champs Power Team began dabbling what 64 Model Aviation Baltimore NBEUB1dIUMIU uu nenu rr game LOOKS like good spot ourto fly Super Cyclone-powered Buzzard Bombshell Old-Timer park ignitionl John Sites looking thermal before launching Shaddo HLG proven high-performance design about text might termed flyoff airplane Part Carls approach staying up long time little no lift available high-aspect-ratio wing very thin airfoil refer Carls design 1979 NFFS Intern ationalPlanbook outstanding publication construc tion problems involved long thin wing especially want fly skinny thing Mach point two becoming omithop ter and/or disaster combat inherent weakness high aspect ratio 131 675-in wing root chord thin airfoil section 612% wing Carl went aluminum skins inboard panels ever stifi Attemps twist wing panels hand near-futile task Carls approach constructing aluminum wing panels preskin sheet balsa 1/16 1/20 balsa wing skins laid smooth flat surface Thinned epoxy applied over balsa 0003-in aluminum put place smooth flat weighted surface placed aluminum Sheet glass works well both top bottom working surfaces preassembled balsa/aluminum skins used sheet wings same manner days yore using conventional wooden leading edge Metal wings have additional maintenance prob lems surface dings broken wings trouble repair metal epoxy add about 10-20 grams finished weight Carl says sure goes higher faster thinking about long thin skinny wings fast FAI Power model might give aluminum try others have like Tom Kerr first alternate 1981 US World Champs Power Team Bob Gutai wont rust hut stay away power lines neat thing about aerodynamics Buckets Johnson calls FAI Power model Centaur Bob Sifleet design Anyone care take wild guess what part country Buckets comes dont change laws physics allowed aerodynamic creation fly yesterday being constant will also allow same similar craetion fly tomorrow fact allows model ers go back through old model magazines confidence old designs will still fly Now aerodynamics errordynamics yesteryear have revalidated what needed good source old model airplane magazines Well may have heard National Air Space Museum Washington DC Besides having fair collection full-scale airplanes NASM also has library over 30000 books 4700 bound periodicals 500000 technical reports archive over 900000 photographs dealing might guess aviation space library periodical collection model airplane magazines including Model Aviation 1976 Model Airplane News Jan 1933 R/C Model Builder Jan 1976 American Modeler/American Aircraft Modeler Oct 1956 Flying Models March 1977 Aero Modeller Good news material accessible NASM may visit library peruse material yourself library staff very helpful adverse us would like browse old model mags NASM Library has Xerox machine available researchers first five copies free dime sheet thereafter will however have sign obtain pass guards desk first floor visit NASM Library area third floor cannot personally make museum may send written request specific material send National Air Space Museum Library Independence Avenue Washington DC 20560 prepared delay response currently two-month backlog NASM Library itself indeed impressive model airplane magazine collec tion unfortunately complete perhaps possible instance Flying Models/Flying Aces very short void comes some magazines like Sig Air Modeler Jr American Modeler titles Continued page 134 1/16 50 LEADING EDGE SPRUCE RUDDR 1/32 K STAB 1/16 3 1/2 FINGER SUPPORT /4 BALSA __ cz DIHEDRAL SLIGHT UNDERCAMBER FROM SECTION C-C TO SHARP EDGE AT TIP II' C C 22 1 A0 OUTDOOR HL GLIDER DESIGNED BY JOHN SITES JAN 1981 July 1981 65 INTRODUCING TRIC LINE CONTROL MODELS p ELECTROLINE MODELS0 FUN PO BOX 2503 SAFE BEVERLY HILLS CA 90213 SEND FOR FREE INFORMATION ON MODEL KITS AND ACCESSORIES QUIET CLEAN EASY TO FLY FAST ASSEMBLY FLYS 15-20 MIN LOW COST available donation Needless say contri butions would greatly appreciated tax deductible Walt says can make seven get five needs out lot bad considering whole operation takes few minutes Peanut Val made method looks great tad heavier made usingWhile subject going back time conventional tacticsAn open invitation has issued Fresno Gas Model Airplane Club quote Novem ber 1939 group people gathered together open area outside Fresno California purpose flying model airplanes statement too earth-shattering itself Banana oil fans have having hard time finding miracle material will welcome word Bill McCombs author Flying Improving Scale ModelAirplanes Bill says try chemical supplier ask either iso amyl acetate common amyl acetate other ainyl acetates sure get recommended advantage has over dope unites fibers tissue adding weight much brushed thinner Additional coats wasted have no further effect after initial reaction tissue non-shrinking qualities banana oil legend aware however best thing floats rubber job several colleagues have learned hard way Thanks help suggestions encour agement Send hints tips pi suggestions Bill Warner 423-C San VicenteBlvd Santa Monico CA 90402 FF Duration/Meuser Continued page 65 presently held go back earliest issues anyone would like contribute collection first write Mimi Scharf director acquistions NASM Library stating what product review product review product review Slope Carrier Slope Associates 2317 N 63rd St Seattle WA 98103 custom-tailored wing bags provide transport storage protection Pat tern Scale Goodyear FAI Sailplanes waterproof heavy nylon k foam internal padding have wrap-around zipperwith two pulls integral handles internal pockets stabilizers Choice colors patterns logos available one- two- multi-piece wings Customer provides templates diagrams other specifications write information Basic price $3995 single-color 9-ft bag Decora tion fee $250 fee logos outsize bags product review product review product review until realize some 41 years ago people have caught big thermal has removed earth now some 41 years later same peoples offspring great-offspring still meeting month same purpose flying model airplanes Granted some models have changed appearance really anymore some modelers have basic looks still wings bodies tails various power types Oh yes now have super engines rpm goes thousands super fuels would make chemist have nightmares rubber-powered models fancy names come halfway around world now some 40 years later can heard awsome sound Super Cykes pulling Carl Goldberg Sailplane banging some old O&R 60 getting Playboy high can May 1940 first Annual club held prizes awarded contestants Trophies ribbons motors kits parts found new homes Everyone entered received some award efforts Now some 41 years later same true now dates flying site have changed year 1981 Annual will held September over twoday period Saturday Sunday 26th 27th planning award some $3000 worth trophies motors kits parts As past 41 years contests have AMA-sanctioned have brought modelers together parts US foreign countries hope past some 1 75 200 entries take part maybe some new old faces will show two days getting-together oldest 0,rS AMAMJ MAS ENTERPRISES 1979-1950SPECIALISTS iN M 5E ONAL CHAMPION Proudly HeadsRC HELICOPTERS tS..LdDP HELl-BOY HEADQUARTERS MJ MAS ENTERPRISES now offering totally tvw service helicopter enthssjastl One-stop shopping yosr R/c Helicopter needs regardless what posre flpingl discoott prices Wo also offtripg free set-up flying instractine yours tht asking Wo hose huilt flown analyzed ostry walor hrand Helicopter avail ohio Oar staff qualified answer questions ranging frow installing train ing gear flying yosr ship inserted GMP Cricket NOW AVAILABLE M J MA5 ENTERPRISES Box 727 Miami FL 33197 Phone 305 255-0658 134 Model Aviation SCHLUTER HELl 60 Size CALL FOR OUR LOW PRICES Schlutar Helicopter Parts Stock Including Pipes Fuselages Etc LOWEST PRICES ,System 80 OVERSEAS DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts Books INSTRUCTIONAL TAPES NOW AVAILABLE Building Trinnsing o Flying Content Flying Novice no Expert Autorotetions selup/Pacnica Flight AMERICAN R/C MANTIS NOW ONLY $11998 5 L oldest modeling Free Flight clubs United States Thanks Russ James Fresno GMAC passing along invitation neighborhood September 26-27 stop have go part $3000 jackpot National Free Flight Society NFFS has just announced recipients Free Flight Hall Fame awards 1981 awards given individuals have contributed different ways development continuity FF model aiplane activities USA throughout world Maxwell Bassett revolution man challenged 1932 rules competition flying model aircraft powered internal com bustion engines events previously flown rubber-powered craft developed successful competition models easily successfully built thousands William L Effinger developer manu facturer tremendous variety award-winning kits can forget mark left hobby Berkeley models Duke Fox developer manufacturer engines priced within financial reach modelers have competitive potential started trend hoC fuels use today Joe Lucas deceased real expert/teacher writer subject model airplanes during 1 920s Chicago area authored columns newspapers magazines also won 1926 1928 Mulvihill event Joe Ott American youth 1930s 1 940s new him aeronautical expert Model kits made company could found hobby shops hardware stores dime stores etc Developer simplified model-assembly techniques awards will made NFFS 1981 AMA Nationals Seguin TX August 6 730 pm FF Indoor/Tenny Continued page 66 Bock Indoor models appears stiff ness rather ultimate strength may well important balsa build Indoor models largely true However con sider model never shrug offmore stress imposed flight loads could built very lightly very us have touch needed handle Indoor model twice strong needs could magically appear flight fully wound being touched human hands Another factor type ceiling site condition air super-light very stiff model quite possibly will survive flights under condi tions especially high drift brings out steering balloon problem very stiff structure can rather easily bent beyond its limit during rafter bounce steering attempt usually model shatters Let bend Suppose model bit flexible may well last much longer stiff model So can get flexible model still light strong answer use heavier moredensebalsabelieveitornot Hereshow use example six-pound wood instead four-pound wood make cross section wood enough smaller structure weight same before Now some what simplified since balsa varies density strength overall quality Before cutting spar sheet balsa examine sheet under magnifying glass NORTHERN CALIFORNIAS LARGEST1 DISCOUNT HOBBY SHOPI well FUELyouI New high film strength lubricant creased power engine lifeI Iquality ingredients IJto cut varnish I II II II II II II II II II II II IHOURS Monday thru weonesooy v ju-o ju inursoay C rrioay vJu-auuI L rday930-600 Sunday 1200-500 riD QQ4_ MaiW1735 bqa at04t7SSQ4NEO675QTC695 QUADRAQUADRAQUADRAQUADRAQUADRA INVERTED MII~iEfi UPRIGNT-iNVERTD dNVERTED MUFFLER UPRIGHTINVERTED UPRIGHT MUFFLER TwinTwa TubeeSinai TubeSinale TubTube 2135 OMUET V SCALE INSTRUMENT KITS OIeIOIO 112 di.575 SIIdia750 IlflO die660 330 QMfIT2 2250 QMTTS 30 t 15 MUFFLERS QMIST 30 5 MUFFLERS 2295 Max 302095Max 30US br 31UUbra 91Is. MakI 15 335 MakI 15 1905 a. ea 2005 nuat leading dualem avallabIe ORDER DIRECT Add 10% peetage hanilng CaIN residents add 6% tax Check Cod accepted card number date wIth VISA MASTER CARD
Edition: Model Aviation - 1981/07
Page Numbers: 64, 65, 134, 135
ree Flight Duration Bob Meuser Model Aviation columists need oc casional vacation Bob Meuser having welldeserved month reliefman Jerry Barnette East Coaster has long-time interest Free Flight Jerry resides Fredricks burg VA Bob Meuser will return next month THE SHADDO KNOWS no great secret successful designs result evolutionary process continuing program eliminating weak aspects refining further desirable John Sites Rockville MD has traveled design-evolution road developing Hand-Launched Glider Shaddo Having built 35 40 buggers over five-year development period Lamont Cranston would agree Johns Shaddo now fully developed competition glider Shaddo s heritage harks back Ron Wittmans Supersweep itself product lengthy evolu tion John began adapting Indorr recordholding design suitable outdoor work flying both 22- 24-in wingspans Several development problems encountered early such inability achieve ahigh altitude launch exact problem/solution develop ment sequence lost history several distinctive features incorporated such clipped undercambered tips Shaddo wing tips product both Johns own philosophy idea used Richard Schreder former modeler champion sailplane pilot/builder HP-series sailplane Schreders idea called Mean Chord Line Tip Theory modifies normal wingtip geome try beginning about half-chord length tip result modification least full-scale sailplane applications increase effective aspect ratio added undercambered section wing tips gradually progressing normal flat-bottomed section fully-undercambered sharp edge tip John decided employ undercamber rather washout reasoning both washout undercambered section would serve same stability purposes stalling later rest wing undercambered section might efficient under normal glide conditions John feels Shaddos unique tip geometry does help increase flight time notes stall does occur can severe normal Another contribution increased flight times may Shaddos undercambered wing tips enclose less wood volume conventional wing hence less tip weight Whatever aerodynamic reasonings result excellent HLG its flying char acteristics outstanding Shaddo has excellent calm air flight times should its Supersweep bloodlines well good windy weather trais John has contest wins under very windy conditions merely shifts center gravity forward just bit Besides ability handle wide range weather condi tions hallmark good design John highly pleased its thermal-hooking capability Shaddo tends center easily light lift Construction typical hand launch -in sheet wing 1/16-in stab 1/32-in rudder fuselage -in hard balsa about 1/32-in Phillips entry leading edge wing wing high-point about 2 5-30% chord Speaking Hand-Launched Gliders brings mind handy trick devised Jerry Murphy Colorado Springs CO bumped Jerry awhile back airport rental car checkin As waiting showed shoebox carrying him Inside ordinary shoebox two Hand-Launched Gliders seems Murphy likes take models along travels business trips fully assembled HLGs akward carry So seemed logical Jerry devise take-apart HandNYLON BOLTS 1/4 BALSA FUSELAGE WINS NYLON GOOMMETS FRONT VIEW OF FUSELAGE NOUL ALIGNMENT STRIPS Launched Glider Jerrys design features removable wing basic method being adaptable HLG Basically fuselage drilled tapped pair nylon bolts tapping can usually done -in balsa fuselage bolt itself threaded fuselage holes case hardened Hot Stuff Murphy uses nylon grommets wing through nylon bolts pass additional alignment security strength triangular fillets glued wing provide snug fit along fuselage system works great Just keep shoebox shoes another gliders dont mix shoes gliders contemporary ironmonger actually ironmonger perhaps aluminummonger would accurate Anyway remember back 1977 Free Flight World Champs Eugeny Verbitsky Russian FAI Power teammates showed up aluminumskinned wings Remember mild flap occuring over latest Soviet coup though recognized being something new FAI technology aluminum wings never really caught chief attribute aluminum-monger ing super stiffness imparted wingincredibly stiff However fairly conservative wing aspect ratios moderate airfoil sections being flown conventional balsasheeted wings stiff enough Since alu minum advantages outweighed extra weight construction hassle new technique did catch ay least American FAI community Carl Bogart having made 1979 US World Champs Power Team began dabbling what 64 Model Aviation Baltimore NBEUB1dIUMIU uu nenu rr game LOOKS like good spot ourto fly Super Cyclone-powered Buzzard Bombshell Old-Timer park ignitionl John Sites looking thermal before launching Shaddo HLG proven high-performance design about text might termed flyoff airplane Part Carls approach staying up long time little no lift available high-aspect-ratio wing very thin airfoil refer Carls design 1979 NFFS Intern ationalPlanbook outstanding publication construc tion problems involved long thin wing especially want fly skinny thing Mach point two becoming omithop ter and/or disaster combat inherent weakness high aspect ratio 131 675-in wing root chord thin airfoil section 612% wing Carl went aluminum skins inboard panels ever stifi Attemps twist wing panels hand near-futile task Carls approach constructing aluminum wing panels preskin sheet balsa 1/16 1/20 balsa wing skins laid smooth flat surface Thinned epoxy applied over balsa 0003-in aluminum put place smooth flat weighted surface placed aluminum Sheet glass works well both top bottom working surfaces preassembled balsa/aluminum skins used sheet wings same manner days yore using conventional wooden leading edge Metal wings have additional maintenance prob lems surface dings broken wings trouble repair metal epoxy add about 10-20 grams finished weight Carl says sure goes higher faster thinking about long thin skinny wings fast FAI Power model might give aluminum try others have like Tom Kerr first alternate 1981 US World Champs Power Team Bob Gutai wont rust hut stay away power lines neat thing about aerodynamics Buckets Johnson calls FAI Power model Centaur Bob Sifleet design Anyone care take wild guess what part country Buckets comes dont change laws physics allowed aerodynamic creation fly yesterday being constant will also allow same similar craetion fly tomorrow fact allows model ers go back through old model magazines confidence old designs will still fly Now aerodynamics errordynamics yesteryear have revalidated what needed good source old model airplane magazines Well may have heard National Air Space Museum Washington DC Besides having fair collection full-scale airplanes NASM also has library over 30000 books 4700 bound periodicals 500000 technical reports archive over 900000 photographs dealing might guess aviation space library periodical collection model airplane magazines including Model Aviation 1976 Model Airplane News Jan 1933 R/C Model Builder Jan 1976 American Modeler/American Aircraft Modeler Oct 1956 Flying Models March 1977 Aero Modeller Good news material accessible NASM may visit library peruse material yourself library staff very helpful adverse us would like browse old model mags NASM Library has Xerox machine available researchers first five copies free dime sheet thereafter will however have sign obtain pass guards desk first floor visit NASM Library area third floor cannot personally make museum may send written request specific material send National Air Space Museum Library Independence Avenue Washington DC 20560 prepared delay response currently two-month backlog NASM Library itself indeed impressive model airplane magazine collec tion unfortunately complete perhaps possible instance Flying Models/Flying Aces very short void comes some magazines like Sig Air Modeler Jr American Modeler titles Continued page 134 1/16 50 LEADING EDGE SPRUCE RUDDR 1/32 K STAB 1/16 3 1/2 FINGER SUPPORT /4 BALSA __ cz DIHEDRAL SLIGHT UNDERCAMBER FROM SECTION C-C TO SHARP EDGE AT TIP II' C C 22 1 A0 OUTDOOR HL GLIDER DESIGNED BY JOHN SITES JAN 1981 July 1981 65 INTRODUCING TRIC LINE CONTROL MODELS p ELECTROLINE MODELS0 FUN PO BOX 2503 SAFE BEVERLY HILLS CA 90213 SEND FOR FREE INFORMATION ON MODEL KITS AND ACCESSORIES QUIET CLEAN EASY TO FLY FAST ASSEMBLY FLYS 15-20 MIN LOW COST available donation Needless say contri butions would greatly appreciated tax deductible Walt says can make seven get five needs out lot bad considering whole operation takes few minutes Peanut Val made method looks great tad heavier made usingWhile subject going back time conventional tacticsAn open invitation has issued Fresno Gas Model Airplane Club quote Novem ber 1939 group people gathered together open area outside Fresno California purpose flying model airplanes statement too earth-shattering itself Banana oil fans have having hard time finding miracle material will welcome word Bill McCombs author Flying Improving Scale ModelAirplanes Bill says try chemical supplier ask either iso amyl acetate common amyl acetate other ainyl acetates sure get recommended advantage has over dope unites fibers tissue adding weight much brushed thinner Additional coats wasted have no further effect after initial reaction tissue non-shrinking qualities banana oil legend aware however best thing floats rubber job several colleagues have learned hard way Thanks help suggestions encour agement Send hints tips pi suggestions Bill Warner 423-C San VicenteBlvd Santa Monico CA 90402 FF Duration/Meuser Continued page 65 presently held go back earliest issues anyone would like contribute collection first write Mimi Scharf director acquistions NASM Library stating what product review product review product review Slope Carrier Slope Associates 2317 N 63rd St Seattle WA 98103 custom-tailored wing bags provide transport storage protection Pat tern Scale Goodyear FAI Sailplanes waterproof heavy nylon k foam internal padding have wrap-around zipperwith two pulls integral handles internal pockets stabilizers Choice colors patterns logos available one- two- multi-piece wings Customer provides templates diagrams other specifications write information Basic price $3995 single-color 9-ft bag Decora tion fee $250 fee logos outsize bags product review product review product review until realize some 41 years ago people have caught big thermal has removed earth now some 41 years later same peoples offspring great-offspring still meeting month same purpose flying model airplanes Granted some models have changed appearance really anymore some modelers have basic looks still wings bodies tails various power types Oh yes now have super engines rpm goes thousands super fuels would make chemist have nightmares rubber-powered models fancy names come halfway around world now some 40 years later can heard awsome sound Super Cykes pulling Carl Goldberg Sailplane banging some old O&R 60 getting Playboy high can May 1940 first Annual club held prizes awarded contestants Trophies ribbons motors kits parts found new homes Everyone entered received some award efforts Now some 41 years later same true now dates flying site have changed year 1981 Annual will held September over twoday period Saturday Sunday 26th 27th planning award some $3000 worth trophies motors kits parts As past 41 years contests have AMA-sanctioned have brought modelers together parts US foreign countries hope past some 1 75 200 entries take part maybe some new old faces will show two days getting-together oldest 0,rS AMAMJ MAS ENTERPRISES 1979-1950SPECIALISTS iN M 5E ONAL CHAMPION Proudly HeadsRC HELICOPTERS tS..LdDP HELl-BOY HEADQUARTERS MJ MAS ENTERPRISES now offering totally tvw service helicopter enthssjastl One-stop shopping yosr R/c Helicopter needs regardless what posre flpingl discoott prices Wo also offtripg free set-up flying instractine yours tht asking Wo hose huilt flown analyzed ostry walor hrand Helicopter avail ohio Oar staff qualified answer questions ranging frow installing train ing gear flying yosr ship inserted GMP Cricket NOW AVAILABLE M J MA5 ENTERPRISES Box 727 Miami FL 33197 Phone 305 255-0658 134 Model Aviation SCHLUTER HELl 60 Size CALL FOR OUR LOW PRICES Schlutar Helicopter Parts Stock Including Pipes Fuselages Etc LOWEST PRICES ,System 80 OVERSEAS DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts Books INSTRUCTIONAL TAPES NOW AVAILABLE Building Trinnsing o Flying Content Flying Novice no Expert Autorotetions selup/Pacnica Flight AMERICAN R/C MANTIS NOW ONLY $11998 5 L oldest modeling Free Flight clubs United States Thanks Russ James Fresno GMAC passing along invitation neighborhood September 26-27 stop have go part $3000 jackpot National Free Flight Society NFFS has just announced recipients Free Flight Hall Fame awards 1981 awards given individuals have contributed different ways development continuity FF model aiplane activities USA throughout world Maxwell Bassett revolution man challenged 1932 rules competition flying model aircraft powered internal com bustion engines events previously flown rubber-powered craft developed successful competition models easily successfully built thousands William L Effinger developer manu facturer tremendous variety award-winning kits can forget mark left hobby Berkeley models Duke Fox developer manufacturer engines priced within financial reach modelers have competitive potential started trend hoC fuels use today Joe Lucas deceased real expert/teacher writer subject model airplanes during 1 920s Chicago area authored columns newspapers magazines also won 1926 1928 Mulvihill event Joe Ott American youth 1930s 1 940s new him aeronautical expert Model kits made company could found hobby shops hardware stores dime stores etc Developer simplified model-assembly techniques awards will made NFFS 1981 AMA Nationals Seguin TX August 6 730 pm FF Indoor/Tenny Continued page 66 Bock Indoor models appears stiff ness rather ultimate strength may well important balsa build Indoor models largely true However con sider model never shrug offmore stress imposed flight loads could built very lightly very us have touch needed handle Indoor model twice strong needs could magically appear flight fully wound being touched human hands Another factor type ceiling site condition air super-light very stiff model quite possibly will survive flights under condi tions especially high drift brings out steering balloon problem very stiff structure can rather easily bent beyond its limit during rafter bounce steering attempt usually model shatters Let bend Suppose model bit flexible may well last much longer stiff model So can get flexible model still light strong answer use heavier moredensebalsabelieveitornot Hereshow use example six-pound wood instead four-pound wood make cross section wood enough smaller structure weight same before Now some what simplified since balsa varies density strength overall quality Before cutting spar sheet balsa examine sheet under magnifying glass NORTHERN CALIFORNIAS LARGEST1 DISCOUNT HOBBY SHOPI well FUELyouI New high film strength lubricant creased power engine lifeI Iquality ingredients IJto cut varnish I II II II II II II II II II II II IHOURS Monday thru weonesooy v ju-o ju inursoay C rrioay vJu-auuI L rday930-600 Sunday 1200-500 riD QQ4_ MaiW1735 bqa at04t7SSQ4NEO675QTC695 QUADRAQUADRAQUADRAQUADRAQUADRA INVERTED MII~iEfi UPRIGNT-iNVERTD dNVERTED MUFFLER UPRIGHTINVERTED UPRIGHT MUFFLER TwinTwa TubeeSinai TubeSinale TubTube 2135 OMUET V SCALE INSTRUMENT KITS OIeIOIO 112 di.575 SIIdia750 IlflO die660 330 QMfIT2 2250 QMTTS 30 t 15 MUFFLERS QMIST 30 5 MUFFLERS 2295 Max 302095Max 30US br 31UUbra 91Is. MakI 15 335 MakI 15 1905 a. ea 2005 nuat leading dualem avallabIe ORDER DIRECT Add 10% peetage hanilng CaIN residents add 6% tax Check Cod accepted card number date wIth VISA MASTER CARD