Duralion f0 Bob Meuser FREE FLIGHT Art Form Awhile back Taft meet opened conver sation almost total stranger usual delicate manner come apparently sane person travels third way around world just run over desert track suit followed toy airplane end string Tam Thompson avid Canadian towline-glider enthusiast replied Its like art form could paint write music would cant So fly Nordic verbatim close art Recently following item appeared program Fortieth Annual Meet ing Mid-America College Arts As sociation 100-300 Machines Fly Ornithopteria Aesthetics Engineering Walter Erbach University Northern Iowa course building flying model air craft aesthetic viewpoint taught Art Department great er backward slope rudder different colors stripes put wings aesthetic right Recently San Franciscos Hyatt Regency14 stories ceilingwe pondered neat would put up microfilm model accompaniment soft violin music playing have attention Ron Wittman steps out sequined leotard Bathed flashing strobe-light accompaniment roll ka-boom drums chucks hand-launch glider up 130 flight cast Bud Romaks world champ door model three-foot cube crystal clear acrylic presentation Mil pitas International Museum Modern Art tried cast Bud launching model eight-foot cube kept blowing bubbles uncured plastic No cooperation art Sure its art dont know thing about what like know art Lightweight Leading Edge recently got hot flashes over putting Cole-type lead ing edge model simply light could have used conventional leading edge large enough get prop er airfoil section adding ex cessive weight using very light balsa stock 2 lb per cu ft wood getting little low i7i ~his solution use strip 3/32 X er /t sq would otherwise required slaunch appropri ate angle worked fine prob lem looks like piece eems little weird model tended Unlimited Rubber Coupe P/30 Rocket events No Non-Cents Strikes Again Pennyplane article June issue mentioned Novice Pennyplane version flown once low-ceiling site Finally 18 months after building model got chance try high-ceiling site during recent FAI Semi-Finals NASA Sunnyvale Needless say bit careful regarding flew it ever collided FAI microfilm model would have hanged dont mean effigy got halfdozen flights best clocked 954 established new National Record Thats quite up Bill Xena kiss Senior record 10028 didnt have father help Thats supposed funny sour grapes prop used first Pennyplane prop madeabout five years oldwith skinny blades Power 25/2-in loop weighing 27 grams later switched 31-in 1oop weighing 35 grams crank ed 2200 turns figuring should good about 11 mm 31-in motor mere 9-in hook spacing too much model flew well after about 5 minutes model started stalling finally stalling violently ground 9 /2 minutes about 400 turns knotted up near rear hook Walnuts Peck Peck-Polymers well known its Peanut Scale kits plans accessories has entered Walnut Scale market its 17/2-in version popular home-built aircraft time Corben Baby Ace rubber CO-2 power Some modelers might find models Walnut Scale class troduced commercially Tern Aero easier build Peanuts since considerably larger kit includes plans stripwood printwood course hardware pack age includes 6-in free-wheeling plastic prop nylon nose button vacuum formed wheel pants wow hardwood wheels ugh pre-cut plywood firewall CO-2 version small decals propshaft wire various parts plans include sufficient boringly detailed build ing flying instructions Domestic white green tissue furnished match colors prototype built EAA President Paul Poberezny 1954 scale documentation small threeviews provided plans refer ences various magazine articles list ed color photo prototype avail able Peck 75 9/16 dihedral about twice scale amount stabilizer has nearly double scale area about 25% wing area features make flight trimming easier ensure good flying characteristics CO-2 power Brown Shark Telcothe tank placed well aft cockpit Separate structions provided CO-2 rubber-power versions Conceivably builder could devise way make model convertible between CO-2 rub ber power would seem rather tricky better decide power 44 Model Aviation rig growing models seed unique model Penny Young placed high recent design competitionbut art See text still more. Photograph Meuser source use before starting construc tion instructions CO-2 version include details mounting filler nozzle such way dont squash fuselage filling tank high wing position generous dihedral stabilizer area model Baby Ace doesnt fly well better scale nodel business dont blame Bob Peck did could dealer doesnt stock Baby Ace convince him error ways send 50 catalog Peck Polymers P 0 Box 2498-MA La Mesa CA 92041 Colored Nitrate Dope February sue mentioned could make col ored dope clear dope adding uni versal tinting colors available paint stores have done worked fine recently unable find brand tinting colors claimed compatible lacquers tried few anyhow either ended up curdled mess coat dope took week dry Fernando Ramos writing Model Builder has frequently mentioned ex cellent covering power enamels used model railroading particularly Floquil brand Ive heard people actually adding Floquil enamel clear dope would suspect might have problems getting stuff dry best have far lower pigment-to-vehicle ratio Floquil itself Now could take pigment out enamel put clear dope can Heres buy enamel careful tip bottle has probably sitting dealers shelf some time pigment will have settled bottom does get mixed let settle day two pour off vehiclethe varnish part enamel will still lot varnish trapped vehicle has settled out can get rid about 90% follows Fill bottle acrylic lacquer thinner shake well let settle about three days pour off liquida mixture varnish thinnerand have left pigment disbursed lacquer thinner tiny bit varnish Fill bottle clear dope behold colored dope will produce maximum coverage minimum weight drying time affected least finish dead flat can made glossy applying clear gloss top coat Total weight addition after coloring lower surfaces about half area upper surfaces 31-in Sparky old-timer rubber model mere 17 grams maximum coverage minimum weight thin 100% use spray gun work Badgers cheapest gun selling under $10 works better easier clean fancy $100 air brush So colored tissue hard get ds Floquil color names bit trying Some colors go names like mud grime useful colors available too under funny names good primary yellow called Reefer Yellow Amtrak Red turns out bril liant orange Colored butyrate dopes available course free-fighters prefer oldfashioned nitrate dope use typical lightweight free-flight structures claim nitrate-doped surfaces stay put whereas butyrate-doped surfaces never quit warping Nitrate dopes arent fuel proof gas models fuel proof top coat required Some use fuel proofer tends peel off Hobby poxy works well adds little weight well thinned applied areas really need Currently Ful lerplast catalyst-activated modified alkydwhatever isis height fashion out west available gallons its peculiari ties Jim Jones Rubber Stripper days yore somehow managed get along whatever sizes rubber com mercially available principally Jas co Later Indoor freaks stripped own whatever width suited fancy strippers consisted razor blade something guide rubber simple principle exasperating execu tion Tricks trade included tucking wooden wedge between jig rub ber served sort self-ener gized brake control tension rubber ahead blade Another trick strip rubber under water Somehow never managed success Just couldnt hold breath long enough day whenever subject Joe Fosters Indoor Baby ROG record made fifties comes up fol lows traumatic description tons rubber became reduced shreds order supply magic bit did trick recently wider variation sizes has become commercially available real indoor nuts strip Continued page 85 September 1977 45 rubber CO2 power new Peck-Polymers 1 7-1/2-in Corben Baby Ace beguiling project Jim Jones inexpensive rubber stripper just thing cutting wida rubber strip stock sizes used indoor Peanut Scala models Necessity mother invention no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA TOp KINNER ~SPORTSTER~ 39wmppon O49poooer up 3chonnets T/c great sport troifler ot t930s$1295 FAIRCHILD 22 IRS Wingspan 9 to25Power 3Chonnel RIC *107 $2990 see local hobby dealer acrylate adhesives such Jet Hot Stuff used construction joints must reasonably tight stuff sim ply wont work sort adhesive sticks like crazy has no filling power solution fill joint something else Ralph Prey writing Satellite recom mends filling joints baking soda Sprinkle little rub gap before applying adhesive Carl Gold berg markets Jet adhesive recom mends microballoons Probably light powdery stuff would dotalcum chalk dust whatever Bob Meuser 4200 Gregory St Oak land CA 94619 FF Scale/Sport/Kuenz continued page 46 power flight Before actually winding up launching model add some downthrust Add shims top surface front former produce down angle prop shaft mid- low-wing model should about 2 3 degrees biplane high-wing model should 4 6 degrees degrees down-thrust just starters Again make sure trimming flying area has plenty grass cushion Hand wind about 50 60 turns motor launch model what ever breeze may Launch same way did gliding model Observe first power-glide flight determine what thrust-line changes may needed stage alter thrustline angles get steady controlled climb model ndes up add downthrust shims top front former 1/32 time model rolls left add shims left side front former produce right-thrust Now hand wind about 75 turns launch same way model turns right little too much remove some right-thrust add some left-thrust Continue test fly model adding 50 winds motor launching again 50 launching until reach maximum winds motor Observe AMERICAN CLASSICS worlds finest models Send free brochure SzwmYn 04 PIE RAm CONTROL VP TO THREE IOIANRDL& FOR RADIOT o r jCOAST PRIOR TiE %OLDENERO Tb ELLA NC ROJRUR COO DO 000 POWER etOlRNRN Itt 703 2739593 NR WINGSPAN 020 POWER PAR PULSE ARD PSALL WRTI.RAIOO FLYLINE MODELS OAR RD FLOWN FREE PLIROT 2905V2020 DOOR AVEFAIRFAX VA22030 flight need still further mi nor thrust-line changes produce wide left-hand nose-up climbing circle climb must highest angle tack still under control No stall ing falling should occur nor gal loping either conditions wastes power prevents model reach ing maximum altitude steady controlled climb may ask left-hand power pat tern model Without going lot past experience models have flown consistently flown lefthand pattern outdoors First fully wound motor will roll model slightly left during power burstand launched slightly right wind model will maintain little longer heading pointed wind will gain little altitude Second torque will roll model left will also keep nose up stalling model roll acts form down-thrust occurs during power burst Conversely straight-ahead climb generally requires too much down-thrust marginal power right-hand climb pat tern seems work well high-wing short-nose models though torque keeps wings somewhat level resultant gyroscopic action wants spiral model after power burst over choice wide left-hand power pattern OK model flying pretty well original motor maximum winds Re move motor install fresh Go immediately near maximum winds Observe model climbs fresh power Make corrections thrust line achieve consistent wide left-hand climb Watch cruise altitude after power burst complete Does model want fly away straight line down wind does tighten up right- left-hand spiralled de cent either case make adjustments rudder maintain wide left-hand cruise glide becomes difficult since must trim rudder will change power burst pattern would model climbs well left gains good alti tude flies down wind turning Slightly off-set rudder trailing edge left add touch rightthrust compensate may thickness card stock What trim necessary get good wide left-hand cruise glide must compensated opposite thrust-line changes power-burst climb pattern will de stroyed Suppose model climbs out well left-hand pattern cruise glide gradually tighten up left spiral dive Add right trim rudder just enough maintain wide left-hand cruise glide will have add some left-thrust take out some right-thrust maintain original climb pattern can easily see time effort must go trimming model fly right during power burst cruise glide Half dozen random flights nowhere near enough trim model properly thing cant believe hap pens guy comes contest new model expects trim few flights luck out two-minute flight doesnt happen way First have ever seen single contest day wasnt windy gusty will never get trimmed properly hur ricane Secondly concentration must go systematic effort mak ing miniature aircraft fly good looks will never happen contest activity going As anything life want get thing good out have put effort Systematically build model right trim right nothing product review product review product review New Books Radio Control Guide Nor man Butcher 250 pages $995 complete primer RC modeling also contains torical Survey Instructors Flight List some basic aerobatic maneuvers complete glossary RC modeling terms Special chap ters Boats Cars Both books re cently printed England distributed US Polks Radio Control Soaring Dave Hughes 260 pages $895 Divided three sections Slope Soaring Thermal Soaring Soaring Aerodynamics Polks Model-Craft Hobbies 314 Fifth Ave New York NY 10001 product review product review product review 86 Model Aviation
Edition: Model Aviation - 1977/09
Page Numbers: 44, 45, 85, 86
Duralion f0 Bob Meuser FREE FLIGHT Art Form Awhile back Taft meet opened conver sation almost total stranger usual delicate manner come apparently sane person travels third way around world just run over desert track suit followed toy airplane end string Tam Thompson avid Canadian towline-glider enthusiast replied Its like art form could paint write music would cant So fly Nordic verbatim close art Recently following item appeared program Fortieth Annual Meet ing Mid-America College Arts As sociation 100-300 Machines Fly Ornithopteria Aesthetics Engineering Walter Erbach University Northern Iowa course building flying model air craft aesthetic viewpoint taught Art Department great er backward slope rudder different colors stripes put wings aesthetic right Recently San Franciscos Hyatt Regency14 stories ceilingwe pondered neat would put up microfilm model accompaniment soft violin music playing have attention Ron Wittman steps out sequined leotard Bathed flashing strobe-light accompaniment roll ka-boom drums chucks hand-launch glider up 130 flight cast Bud Romaks world champ door model three-foot cube crystal clear acrylic presentation Mil pitas International Museum Modern Art tried cast Bud launching model eight-foot cube kept blowing bubbles uncured plastic No cooperation art Sure its art dont know thing about what like know art Lightweight Leading Edge recently got hot flashes over putting Cole-type lead ing edge model simply light could have used conventional leading edge large enough get prop er airfoil section adding ex cessive weight using very light balsa stock 2 lb per cu ft wood getting little low i7i ~his solution use strip 3/32 X er /t sq would otherwise required slaunch appropri ate angle worked fine prob lem looks like piece eems little weird model tended Unlimited Rubber Coupe P/30 Rocket events No Non-Cents Strikes Again Pennyplane article June issue mentioned Novice Pennyplane version flown once low-ceiling site Finally 18 months after building model got chance try high-ceiling site during recent FAI Semi-Finals NASA Sunnyvale Needless say bit careful regarding flew it ever collided FAI microfilm model would have hanged dont mean effigy got halfdozen flights best clocked 954 established new National Record Thats quite up Bill Xena kiss Senior record 10028 didnt have father help Thats supposed funny sour grapes prop used first Pennyplane prop madeabout five years oldwith skinny blades Power 25/2-in loop weighing 27 grams later switched 31-in 1oop weighing 35 grams crank ed 2200 turns figuring should good about 11 mm 31-in motor mere 9-in hook spacing too much model flew well after about 5 minutes model started stalling finally stalling violently ground 9 /2 minutes about 400 turns knotted up near rear hook Walnuts Peck Peck-Polymers well known its Peanut Scale kits plans accessories has entered Walnut Scale market its 17/2-in version popular home-built aircraft time Corben Baby Ace rubber CO-2 power Some modelers might find models Walnut Scale class troduced commercially Tern Aero easier build Peanuts since considerably larger kit includes plans stripwood printwood course hardware pack age includes 6-in free-wheeling plastic prop nylon nose button vacuum formed wheel pants wow hardwood wheels ugh pre-cut plywood firewall CO-2 version small decals propshaft wire various parts plans include sufficient boringly detailed build ing flying instructions Domestic white green tissue furnished match colors prototype built EAA President Paul Poberezny 1954 scale documentation small threeviews provided plans refer ences various magazine articles list ed color photo prototype avail able Peck 75 9/16 dihedral about twice scale amount stabilizer has nearly double scale area about 25% wing area features make flight trimming easier ensure good flying characteristics CO-2 power Brown Shark Telcothe tank placed well aft cockpit Separate structions provided CO-2 rubber-power versions Conceivably builder could devise way make model convertible between CO-2 rub ber power would seem rather tricky better decide power 44 Model Aviation rig growing models seed unique model Penny Young placed high recent design competitionbut art See text still more. Photograph Meuser source use before starting construc tion instructions CO-2 version include details mounting filler nozzle such way dont squash fuselage filling tank high wing position generous dihedral stabilizer area model Baby Ace doesnt fly well better scale nodel business dont blame Bob Peck did could dealer doesnt stock Baby Ace convince him error ways send 50 catalog Peck Polymers P 0 Box 2498-MA La Mesa CA 92041 Colored Nitrate Dope February sue mentioned could make col ored dope clear dope adding uni versal tinting colors available paint stores have done worked fine recently unable find brand tinting colors claimed compatible lacquers tried few anyhow either ended up curdled mess coat dope took week dry Fernando Ramos writing Model Builder has frequently mentioned ex cellent covering power enamels used model railroading particularly Floquil brand Ive heard people actually adding Floquil enamel clear dope would suspect might have problems getting stuff dry best have far lower pigment-to-vehicle ratio Floquil itself Now could take pigment out enamel put clear dope can Heres buy enamel careful tip bottle has probably sitting dealers shelf some time pigment will have settled bottom does get mixed let settle day two pour off vehiclethe varnish part enamel will still lot varnish trapped vehicle has settled out can get rid about 90% follows Fill bottle acrylic lacquer thinner shake well let settle about three days pour off liquida mixture varnish thinnerand have left pigment disbursed lacquer thinner tiny bit varnish Fill bottle clear dope behold colored dope will produce maximum coverage minimum weight drying time affected least finish dead flat can made glossy applying clear gloss top coat Total weight addition after coloring lower surfaces about half area upper surfaces 31-in Sparky old-timer rubber model mere 17 grams maximum coverage minimum weight thin 100% use spray gun work Badgers cheapest gun selling under $10 works better easier clean fancy $100 air brush So colored tissue hard get ds Floquil color names bit trying Some colors go names like mud grime useful colors available too under funny names good primary yellow called Reefer Yellow Amtrak Red turns out bril liant orange Colored butyrate dopes available course free-fighters prefer oldfashioned nitrate dope use typical lightweight free-flight structures claim nitrate-doped surfaces stay put whereas butyrate-doped surfaces never quit warping Nitrate dopes arent fuel proof gas models fuel proof top coat required Some use fuel proofer tends peel off Hobby poxy works well adds little weight well thinned applied areas really need Currently Ful lerplast catalyst-activated modified alkydwhatever isis height fashion out west available gallons its peculiari ties Jim Jones Rubber Stripper days yore somehow managed get along whatever sizes rubber com mercially available principally Jas co Later Indoor freaks stripped own whatever width suited fancy strippers consisted razor blade something guide rubber simple principle exasperating execu tion Tricks trade included tucking wooden wedge between jig rub ber served sort self-ener gized brake control tension rubber ahead blade Another trick strip rubber under water Somehow never managed success Just couldnt hold breath long enough day whenever subject Joe Fosters Indoor Baby ROG record made fifties comes up fol lows traumatic description tons rubber became reduced shreds order supply magic bit did trick recently wider variation sizes has become commercially available real indoor nuts strip Continued page 85 September 1977 45 rubber CO2 power new Peck-Polymers 1 7-1/2-in Corben Baby Ace beguiling project Jim Jones inexpensive rubber stripper just thing cutting wida rubber strip stock sizes used indoor Peanut Scala models Necessity mother invention no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA TOp KINNER ~SPORTSTER~ 39wmppon O49poooer up 3chonnets T/c great sport troifler ot t930s$1295 FAIRCHILD 22 IRS Wingspan 9 to25Power 3Chonnel RIC *107 $2990 see local hobby dealer acrylate adhesives such Jet Hot Stuff used construction joints must reasonably tight stuff sim ply wont work sort adhesive sticks like crazy has no filling power solution fill joint something else Ralph Prey writing Satellite recom mends filling joints baking soda Sprinkle little rub gap before applying adhesive Carl Gold berg markets Jet adhesive recom mends microballoons Probably light powdery stuff would dotalcum chalk dust whatever Bob Meuser 4200 Gregory St Oak land CA 94619 FF Scale/Sport/Kuenz continued page 46 power flight Before actually winding up launching model add some downthrust Add shims top surface front former produce down angle prop shaft mid- low-wing model should about 2 3 degrees biplane high-wing model should 4 6 degrees degrees down-thrust just starters Again make sure trimming flying area has plenty grass cushion Hand wind about 50 60 turns motor launch model what ever breeze may Launch same way did gliding model Observe first power-glide flight determine what thrust-line changes may needed stage alter thrustline angles get steady controlled climb model ndes up add downthrust shims top front former 1/32 time model rolls left add shims left side front former produce right-thrust Now hand wind about 75 turns launch same way model turns right little too much remove some right-thrust add some left-thrust Continue test fly model adding 50 winds motor launching again 50 launching until reach maximum winds motor Observe AMERICAN CLASSICS worlds finest models Send free brochure SzwmYn 04 PIE RAm CONTROL VP TO THREE IOIANRDL& FOR RADIOT o r jCOAST PRIOR TiE %OLDENERO Tb ELLA NC ROJRUR COO DO 000 POWER etOlRNRN Itt 703 2739593 NR WINGSPAN 020 POWER PAR PULSE ARD PSALL WRTI.RAIOO FLYLINE MODELS OAR RD FLOWN FREE PLIROT 2905V2020 DOOR AVEFAIRFAX VA22030 flight need still further mi nor thrust-line changes produce wide left-hand nose-up climbing circle climb must highest angle tack still under control No stall ing falling should occur nor gal loping either conditions wastes power prevents model reach ing maximum altitude steady controlled climb may ask left-hand power pat tern model Without going lot past experience models have flown consistently flown lefthand pattern outdoors First fully wound motor will roll model slightly left during power burstand launched slightly right wind model will maintain little longer heading pointed wind will gain little altitude Second torque will roll model left will also keep nose up stalling model roll acts form down-thrust occurs during power burst Conversely straight-ahead climb generally requires too much down-thrust marginal power right-hand climb pat tern seems work well high-wing short-nose models though torque keeps wings somewhat level resultant gyroscopic action wants spiral model after power burst over choice wide left-hand power pattern OK model flying pretty well original motor maximum winds Re move motor install fresh Go immediately near maximum winds Observe model climbs fresh power Make corrections thrust line achieve consistent wide left-hand climb Watch cruise altitude after power burst complete Does model want fly away straight line down wind does tighten up right- left-hand spiralled de cent either case make adjustments rudder maintain wide left-hand cruise glide becomes difficult since must trim rudder will change power burst pattern would model climbs well left gains good alti tude flies down wind turning Slightly off-set rudder trailing edge left add touch rightthrust compensate may thickness card stock What trim necessary get good wide left-hand cruise glide must compensated opposite thrust-line changes power-burst climb pattern will de stroyed Suppose model climbs out well left-hand pattern cruise glide gradually tighten up left spiral dive Add right trim rudder just enough maintain wide left-hand cruise glide will have add some left-thrust take out some right-thrust maintain original climb pattern can easily see time effort must go trimming model fly right during power burst cruise glide Half dozen random flights nowhere near enough trim model properly thing cant believe hap pens guy comes contest new model expects trim few flights luck out two-minute flight doesnt happen way First have ever seen single contest day wasnt windy gusty will never get trimmed properly hur ricane Secondly concentration must go systematic effort mak ing miniature aircraft fly good looks will never happen contest activity going As anything life want get thing good out have put effort Systematically build model right trim right nothing product review product review product review New Books Radio Control Guide Nor man Butcher 250 pages $995 complete primer RC modeling also contains torical Survey Instructors Flight List some basic aerobatic maneuvers complete glossary RC modeling terms Special chap ters Boats Cars Both books re cently printed England distributed US Polks Radio Control Soaring Dave Hughes 260 pages $895 Divided three sections Slope Soaring Thermal Soaring Soaring Aerodynamics Polks Model-Craft Hobbies 314 Fifth Ave New York NY 10001 product review product review product review 86 Model Aviation
Edition: Model Aviation - 1977/09
Page Numbers: 44, 45, 85, 86
Duralion f0 Bob Meuser FREE FLIGHT Art Form Awhile back Taft meet opened conver sation almost total stranger usual delicate manner come apparently sane person travels third way around world just run over desert track suit followed toy airplane end string Tam Thompson avid Canadian towline-glider enthusiast replied Its like art form could paint write music would cant So fly Nordic verbatim close art Recently following item appeared program Fortieth Annual Meet ing Mid-America College Arts As sociation 100-300 Machines Fly Ornithopteria Aesthetics Engineering Walter Erbach University Northern Iowa course building flying model air craft aesthetic viewpoint taught Art Department great er backward slope rudder different colors stripes put wings aesthetic right Recently San Franciscos Hyatt Regency14 stories ceilingwe pondered neat would put up microfilm model accompaniment soft violin music playing have attention Ron Wittman steps out sequined leotard Bathed flashing strobe-light accompaniment roll ka-boom drums chucks hand-launch glider up 130 flight cast Bud Romaks world champ door model three-foot cube crystal clear acrylic presentation Mil pitas International Museum Modern Art tried cast Bud launching model eight-foot cube kept blowing bubbles uncured plastic No cooperation art Sure its art dont know thing about what like know art Lightweight Leading Edge recently got hot flashes over putting Cole-type lead ing edge model simply light could have used conventional leading edge large enough get prop er airfoil section adding ex cessive weight using very light balsa stock 2 lb per cu ft wood getting little low i7i ~his solution use strip 3/32 X er /t sq would otherwise required slaunch appropri ate angle worked fine prob lem looks like piece eems little weird model tended Unlimited Rubber Coupe P/30 Rocket events No Non-Cents Strikes Again Pennyplane article June issue mentioned Novice Pennyplane version flown once low-ceiling site Finally 18 months after building model got chance try high-ceiling site during recent FAI Semi-Finals NASA Sunnyvale Needless say bit careful regarding flew it ever collided FAI microfilm model would have hanged dont mean effigy got halfdozen flights best clocked 954 established new National Record Thats quite up Bill Xena kiss Senior record 10028 didnt have father help Thats supposed funny sour grapes prop used first Pennyplane prop madeabout five years oldwith skinny blades Power 25/2-in loop weighing 27 grams later switched 31-in 1oop weighing 35 grams crank ed 2200 turns figuring should good about 11 mm 31-in motor mere 9-in hook spacing too much model flew well after about 5 minutes model started stalling finally stalling violently ground 9 /2 minutes about 400 turns knotted up near rear hook Walnuts Peck Peck-Polymers well known its Peanut Scale kits plans accessories has entered Walnut Scale market its 17/2-in version popular home-built aircraft time Corben Baby Ace rubber CO-2 power Some modelers might find models Walnut Scale class troduced commercially Tern Aero easier build Peanuts since considerably larger kit includes plans stripwood printwood course hardware pack age includes 6-in free-wheeling plastic prop nylon nose button vacuum formed wheel pants wow hardwood wheels ugh pre-cut plywood firewall CO-2 version small decals propshaft wire various parts plans include sufficient boringly detailed build ing flying instructions Domestic white green tissue furnished match colors prototype built EAA President Paul Poberezny 1954 scale documentation small threeviews provided plans refer ences various magazine articles list ed color photo prototype avail able Peck 75 9/16 dihedral about twice scale amount stabilizer has nearly double scale area about 25% wing area features make flight trimming easier ensure good flying characteristics CO-2 power Brown Shark Telcothe tank placed well aft cockpit Separate structions provided CO-2 rubber-power versions Conceivably builder could devise way make model convertible between CO-2 rub ber power would seem rather tricky better decide power 44 Model Aviation rig growing models seed unique model Penny Young placed high recent design competitionbut art See text still more. Photograph Meuser source use before starting construc tion instructions CO-2 version include details mounting filler nozzle such way dont squash fuselage filling tank high wing position generous dihedral stabilizer area model Baby Ace doesnt fly well better scale nodel business dont blame Bob Peck did could dealer doesnt stock Baby Ace convince him error ways send 50 catalog Peck Polymers P 0 Box 2498-MA La Mesa CA 92041 Colored Nitrate Dope February sue mentioned could make col ored dope clear dope adding uni versal tinting colors available paint stores have done worked fine recently unable find brand tinting colors claimed compatible lacquers tried few anyhow either ended up curdled mess coat dope took week dry Fernando Ramos writing Model Builder has frequently mentioned ex cellent covering power enamels used model railroading particularly Floquil brand Ive heard people actually adding Floquil enamel clear dope would suspect might have problems getting stuff dry best have far lower pigment-to-vehicle ratio Floquil itself Now could take pigment out enamel put clear dope can Heres buy enamel careful tip bottle has probably sitting dealers shelf some time pigment will have settled bottom does get mixed let settle day two pour off vehiclethe varnish part enamel will still lot varnish trapped vehicle has settled out can get rid about 90% follows Fill bottle acrylic lacquer thinner shake well let settle about three days pour off liquida mixture varnish thinnerand have left pigment disbursed lacquer thinner tiny bit varnish Fill bottle clear dope behold colored dope will produce maximum coverage minimum weight drying time affected least finish dead flat can made glossy applying clear gloss top coat Total weight addition after coloring lower surfaces about half area upper surfaces 31-in Sparky old-timer rubber model mere 17 grams maximum coverage minimum weight thin 100% use spray gun work Badgers cheapest gun selling under $10 works better easier clean fancy $100 air brush So colored tissue hard get ds Floquil color names bit trying Some colors go names like mud grime useful colors available too under funny names good primary yellow called Reefer Yellow Amtrak Red turns out bril liant orange Colored butyrate dopes available course free-fighters prefer oldfashioned nitrate dope use typical lightweight free-flight structures claim nitrate-doped surfaces stay put whereas butyrate-doped surfaces never quit warping Nitrate dopes arent fuel proof gas models fuel proof top coat required Some use fuel proofer tends peel off Hobby poxy works well adds little weight well thinned applied areas really need Currently Ful lerplast catalyst-activated modified alkydwhatever isis height fashion out west available gallons its peculiari ties Jim Jones Rubber Stripper days yore somehow managed get along whatever sizes rubber com mercially available principally Jas co Later Indoor freaks stripped own whatever width suited fancy strippers consisted razor blade something guide rubber simple principle exasperating execu tion Tricks trade included tucking wooden wedge between jig rub ber served sort self-ener gized brake control tension rubber ahead blade Another trick strip rubber under water Somehow never managed success Just couldnt hold breath long enough day whenever subject Joe Fosters Indoor Baby ROG record made fifties comes up fol lows traumatic description tons rubber became reduced shreds order supply magic bit did trick recently wider variation sizes has become commercially available real indoor nuts strip Continued page 85 September 1977 45 rubber CO2 power new Peck-Polymers 1 7-1/2-in Corben Baby Ace beguiling project Jim Jones inexpensive rubber stripper just thing cutting wida rubber strip stock sizes used indoor Peanut Scala models Necessity mother invention no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA TOp KINNER ~SPORTSTER~ 39wmppon O49poooer up 3chonnets T/c great sport troifler ot t930s$1295 FAIRCHILD 22 IRS Wingspan 9 to25Power 3Chonnel RIC *107 $2990 see local hobby dealer acrylate adhesives such Jet Hot Stuff used construction joints must reasonably tight stuff sim ply wont work sort adhesive sticks like crazy has no filling power solution fill joint something else Ralph Prey writing Satellite recom mends filling joints baking soda Sprinkle little rub gap before applying adhesive Carl Gold berg markets Jet adhesive recom mends microballoons Probably light powdery stuff would dotalcum chalk dust whatever Bob Meuser 4200 Gregory St Oak land CA 94619 FF Scale/Sport/Kuenz continued page 46 power flight Before actually winding up launching model add some downthrust Add shims top surface front former produce down angle prop shaft mid- low-wing model should about 2 3 degrees biplane high-wing model should 4 6 degrees degrees down-thrust just starters Again make sure trimming flying area has plenty grass cushion Hand wind about 50 60 turns motor launch model what ever breeze may Launch same way did gliding model Observe first power-glide flight determine what thrust-line changes may needed stage alter thrustline angles get steady controlled climb model ndes up add downthrust shims top front former 1/32 time model rolls left add shims left side front former produce right-thrust Now hand wind about 75 turns launch same way model turns right little too much remove some right-thrust add some left-thrust Continue test fly model adding 50 winds motor launching again 50 launching until reach maximum winds motor Observe AMERICAN CLASSICS worlds finest models Send free brochure SzwmYn 04 PIE RAm CONTROL VP TO THREE IOIANRDL& FOR RADIOT o r jCOAST PRIOR TiE %OLDENERO Tb ELLA NC ROJRUR COO DO 000 POWER etOlRNRN Itt 703 2739593 NR WINGSPAN 020 POWER PAR PULSE ARD PSALL WRTI.RAIOO FLYLINE MODELS OAR RD FLOWN FREE PLIROT 2905V2020 DOOR AVEFAIRFAX VA22030 flight need still further mi nor thrust-line changes produce wide left-hand nose-up climbing circle climb must highest angle tack still under control No stall ing falling should occur nor gal loping either conditions wastes power prevents model reach ing maximum altitude steady controlled climb may ask left-hand power pat tern model Without going lot past experience models have flown consistently flown lefthand pattern outdoors First fully wound motor will roll model slightly left during power burstand launched slightly right wind model will maintain little longer heading pointed wind will gain little altitude Second torque will roll model left will also keep nose up stalling model roll acts form down-thrust occurs during power burst Conversely straight-ahead climb generally requires too much down-thrust marginal power right-hand climb pat tern seems work well high-wing short-nose models though torque keeps wings somewhat level resultant gyroscopic action wants spiral model after power burst over choice wide left-hand power pattern OK model flying pretty well original motor maximum winds Re move motor install fresh Go immediately near maximum winds Observe model climbs fresh power Make corrections thrust line achieve consistent wide left-hand climb Watch cruise altitude after power burst complete Does model want fly away straight line down wind does tighten up right- left-hand spiralled de cent either case make adjustments rudder maintain wide left-hand cruise glide becomes difficult since must trim rudder will change power burst pattern would model climbs well left gains good alti tude flies down wind turning Slightly off-set rudder trailing edge left add touch rightthrust compensate may thickness card stock What trim necessary get good wide left-hand cruise glide must compensated opposite thrust-line changes power-burst climb pattern will de stroyed Suppose model climbs out well left-hand pattern cruise glide gradually tighten up left spiral dive Add right trim rudder just enough maintain wide left-hand cruise glide will have add some left-thrust take out some right-thrust maintain original climb pattern can easily see time effort must go trimming model fly right during power burst cruise glide Half dozen random flights nowhere near enough trim model properly thing cant believe hap pens guy comes contest new model expects trim few flights luck out two-minute flight doesnt happen way First have ever seen single contest day wasnt windy gusty will never get trimmed properly hur ricane Secondly concentration must go systematic effort mak ing miniature aircraft fly good looks will never happen contest activity going As anything life want get thing good out have put effort Systematically build model right trim right nothing product review product review product review New Books Radio Control Guide Nor man Butcher 250 pages $995 complete primer RC modeling also contains torical Survey Instructors Flight List some basic aerobatic maneuvers complete glossary RC modeling terms Special chap ters Boats Cars Both books re cently printed England distributed US Polks Radio Control Soaring Dave Hughes 260 pages $895 Divided three sections Slope Soaring Thermal Soaring Soaring Aerodynamics Polks Model-Craft Hobbies 314 Fifth Ave New York NY 10001 product review product review product review 86 Model Aviation
Edition: Model Aviation - 1977/09
Page Numbers: 44, 45, 85, 86
Duralion f0 Bob Meuser FREE FLIGHT Art Form Awhile back Taft meet opened conver sation almost total stranger usual delicate manner come apparently sane person travels third way around world just run over desert track suit followed toy airplane end string Tam Thompson avid Canadian towline-glider enthusiast replied Its like art form could paint write music would cant So fly Nordic verbatim close art Recently following item appeared program Fortieth Annual Meet ing Mid-America College Arts As sociation 100-300 Machines Fly Ornithopteria Aesthetics Engineering Walter Erbach University Northern Iowa course building flying model air craft aesthetic viewpoint taught Art Department great er backward slope rudder different colors stripes put wings aesthetic right Recently San Franciscos Hyatt Regency14 stories ceilingwe pondered neat would put up microfilm model accompaniment soft violin music playing have attention Ron Wittman steps out sequined leotard Bathed flashing strobe-light accompaniment roll ka-boom drums chucks hand-launch glider up 130 flight cast Bud Romaks world champ door model three-foot cube crystal clear acrylic presentation Mil pitas International Museum Modern Art tried cast Bud launching model eight-foot cube kept blowing bubbles uncured plastic No cooperation art Sure its art dont know thing about what like know art Lightweight Leading Edge recently got hot flashes over putting Cole-type lead ing edge model simply light could have used conventional leading edge large enough get prop er airfoil section adding ex cessive weight using very light balsa stock 2 lb per cu ft wood getting little low i7i ~his solution use strip 3/32 X er /t sq would otherwise required slaunch appropri ate angle worked fine prob lem looks like piece eems little weird model tended Unlimited Rubber Coupe P/30 Rocket events No Non-Cents Strikes Again Pennyplane article June issue mentioned Novice Pennyplane version flown once low-ceiling site Finally 18 months after building model got chance try high-ceiling site during recent FAI Semi-Finals NASA Sunnyvale Needless say bit careful regarding flew it ever collided FAI microfilm model would have hanged dont mean effigy got halfdozen flights best clocked 954 established new National Record Thats quite up Bill Xena kiss Senior record 10028 didnt have father help Thats supposed funny sour grapes prop used first Pennyplane prop madeabout five years oldwith skinny blades Power 25/2-in loop weighing 27 grams later switched 31-in 1oop weighing 35 grams crank ed 2200 turns figuring should good about 11 mm 31-in motor mere 9-in hook spacing too much model flew well after about 5 minutes model started stalling finally stalling violently ground 9 /2 minutes about 400 turns knotted up near rear hook Walnuts Peck Peck-Polymers well known its Peanut Scale kits plans accessories has entered Walnut Scale market its 17/2-in version popular home-built aircraft time Corben Baby Ace rubber CO-2 power Some modelers might find models Walnut Scale class troduced commercially Tern Aero easier build Peanuts since considerably larger kit includes plans stripwood printwood course hardware pack age includes 6-in free-wheeling plastic prop nylon nose button vacuum formed wheel pants wow hardwood wheels ugh pre-cut plywood firewall CO-2 version small decals propshaft wire various parts plans include sufficient boringly detailed build ing flying instructions Domestic white green tissue furnished match colors prototype built EAA President Paul Poberezny 1954 scale documentation small threeviews provided plans refer ences various magazine articles list ed color photo prototype avail able Peck 75 9/16 dihedral about twice scale amount stabilizer has nearly double scale area about 25% wing area features make flight trimming easier ensure good flying characteristics CO-2 power Brown Shark Telcothe tank placed well aft cockpit Separate structions provided CO-2 rubber-power versions Conceivably builder could devise way make model convertible between CO-2 rub ber power would seem rather tricky better decide power 44 Model Aviation rig growing models seed unique model Penny Young placed high recent design competitionbut art See text still more. Photograph Meuser source use before starting construc tion instructions CO-2 version include details mounting filler nozzle such way dont squash fuselage filling tank high wing position generous dihedral stabilizer area model Baby Ace doesnt fly well better scale nodel business dont blame Bob Peck did could dealer doesnt stock Baby Ace convince him error ways send 50 catalog Peck Polymers P 0 Box 2498-MA La Mesa CA 92041 Colored Nitrate Dope February sue mentioned could make col ored dope clear dope adding uni versal tinting colors available paint stores have done worked fine recently unable find brand tinting colors claimed compatible lacquers tried few anyhow either ended up curdled mess coat dope took week dry Fernando Ramos writing Model Builder has frequently mentioned ex cellent covering power enamels used model railroading particularly Floquil brand Ive heard people actually adding Floquil enamel clear dope would suspect might have problems getting stuff dry best have far lower pigment-to-vehicle ratio Floquil itself Now could take pigment out enamel put clear dope can Heres buy enamel careful tip bottle has probably sitting dealers shelf some time pigment will have settled bottom does get mixed let settle day two pour off vehiclethe varnish part enamel will still lot varnish trapped vehicle has settled out can get rid about 90% follows Fill bottle acrylic lacquer thinner shake well let settle about three days pour off liquida mixture varnish thinnerand have left pigment disbursed lacquer thinner tiny bit varnish Fill bottle clear dope behold colored dope will produce maximum coverage minimum weight drying time affected least finish dead flat can made glossy applying clear gloss top coat Total weight addition after coloring lower surfaces about half area upper surfaces 31-in Sparky old-timer rubber model mere 17 grams maximum coverage minimum weight thin 100% use spray gun work Badgers cheapest gun selling under $10 works better easier clean fancy $100 air brush So colored tissue hard get ds Floquil color names bit trying Some colors go names like mud grime useful colors available too under funny names good primary yellow called Reefer Yellow Amtrak Red turns out bril liant orange Colored butyrate dopes available course free-fighters prefer oldfashioned nitrate dope use typical lightweight free-flight structures claim nitrate-doped surfaces stay put whereas butyrate-doped surfaces never quit warping Nitrate dopes arent fuel proof gas models fuel proof top coat required Some use fuel proofer tends peel off Hobby poxy works well adds little weight well thinned applied areas really need Currently Ful lerplast catalyst-activated modified alkydwhatever isis height fashion out west available gallons its peculiari ties Jim Jones Rubber Stripper days yore somehow managed get along whatever sizes rubber com mercially available principally Jas co Later Indoor freaks stripped own whatever width suited fancy strippers consisted razor blade something guide rubber simple principle exasperating execu tion Tricks trade included tucking wooden wedge between jig rub ber served sort self-ener gized brake control tension rubber ahead blade Another trick strip rubber under water Somehow never managed success Just couldnt hold breath long enough day whenever subject Joe Fosters Indoor Baby ROG record made fifties comes up fol lows traumatic description tons rubber became reduced shreds order supply magic bit did trick recently wider variation sizes has become commercially available real indoor nuts strip Continued page 85 September 1977 45 rubber CO2 power new Peck-Polymers 1 7-1/2-in Corben Baby Ace beguiling project Jim Jones inexpensive rubber stripper just thing cutting wida rubber strip stock sizes used indoor Peanut Scala models Necessity mother invention no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA TOp KINNER ~SPORTSTER~ 39wmppon O49poooer up 3chonnets T/c great sport troifler ot t930s$1295 FAIRCHILD 22 IRS Wingspan 9 to25Power 3Chonnel RIC *107 $2990 see local hobby dealer acrylate adhesives such Jet Hot Stuff used construction joints must reasonably tight stuff sim ply wont work sort adhesive sticks like crazy has no filling power solution fill joint something else Ralph Prey writing Satellite recom mends filling joints baking soda Sprinkle little rub gap before applying adhesive Carl Gold berg markets Jet adhesive recom mends microballoons Probably light powdery stuff would dotalcum chalk dust whatever Bob Meuser 4200 Gregory St Oak land CA 94619 FF Scale/Sport/Kuenz continued page 46 power flight Before actually winding up launching model add some downthrust Add shims top surface front former produce down angle prop shaft mid- low-wing model should about 2 3 degrees biplane high-wing model should 4 6 degrees degrees down-thrust just starters Again make sure trimming flying area has plenty grass cushion Hand wind about 50 60 turns motor launch model what ever breeze may Launch same way did gliding model Observe first power-glide flight determine what thrust-line changes may needed stage alter thrustline angles get steady controlled climb model ndes up add downthrust shims top front former 1/32 time model rolls left add shims left side front former produce right-thrust Now hand wind about 75 turns launch same way model turns right little too much remove some right-thrust add some left-thrust Continue test fly model adding 50 winds motor launching again 50 launching until reach maximum winds motor Observe AMERICAN CLASSICS worlds finest models Send free brochure SzwmYn 04 PIE RAm CONTROL VP TO THREE IOIANRDL& FOR RADIOT o r jCOAST PRIOR TiE %OLDENERO Tb ELLA NC ROJRUR COO DO 000 POWER etOlRNRN Itt 703 2739593 NR WINGSPAN 020 POWER PAR PULSE ARD PSALL WRTI.RAIOO FLYLINE MODELS OAR RD FLOWN FREE PLIROT 2905V2020 DOOR AVEFAIRFAX VA22030 flight need still further mi nor thrust-line changes produce wide left-hand nose-up climbing circle climb must highest angle tack still under control No stall ing falling should occur nor gal loping either conditions wastes power prevents model reach ing maximum altitude steady controlled climb may ask left-hand power pat tern model Without going lot past experience models have flown consistently flown lefthand pattern outdoors First fully wound motor will roll model slightly left during power burstand launched slightly right wind model will maintain little longer heading pointed wind will gain little altitude Second torque will roll model left will also keep nose up stalling model roll acts form down-thrust occurs during power burst Conversely straight-ahead climb generally requires too much down-thrust marginal power right-hand climb pat tern seems work well high-wing short-nose models though torque keeps wings somewhat level resultant gyroscopic action wants spiral model after power burst over choice wide left-hand power pattern OK model flying pretty well original motor maximum winds Re move motor install fresh Go immediately near maximum winds Observe model climbs fresh power Make corrections thrust line achieve consistent wide left-hand climb Watch cruise altitude after power burst complete Does model want fly away straight line down wind does tighten up right- left-hand spiralled de cent either case make adjustments rudder maintain wide left-hand cruise glide becomes difficult since must trim rudder will change power burst pattern would model climbs well left gains good alti tude flies down wind turning Slightly off-set rudder trailing edge left add touch rightthrust compensate may thickness card stock What trim necessary get good wide left-hand cruise glide must compensated opposite thrust-line changes power-burst climb pattern will de stroyed Suppose model climbs out well left-hand pattern cruise glide gradually tighten up left spiral dive Add right trim rudder just enough maintain wide left-hand cruise glide will have add some left-thrust take out some right-thrust maintain original climb pattern can easily see time effort must go trimming model fly right during power burst cruise glide Half dozen random flights nowhere near enough trim model properly thing cant believe hap pens guy comes contest new model expects trim few flights luck out two-minute flight doesnt happen way First have ever seen single contest day wasnt windy gusty will never get trimmed properly hur ricane Secondly concentration must go systematic effort mak ing miniature aircraft fly good looks will never happen contest activity going As anything life want get thing good out have put effort Systematically build model right trim right nothing product review product review product review New Books Radio Control Guide Nor man Butcher 250 pages $995 complete primer RC modeling also contains torical Survey Instructors Flight List some basic aerobatic maneuvers complete glossary RC modeling terms Special chap ters Boats Cars Both books re cently printed England distributed US Polks Radio Control Soaring Dave Hughes 260 pages $895 Divided three sections Slope Soaring Thermal Soaring Soaring Aerodynamics Polks Model-Craft Hobbies 314 Fifth Ave New York NY 10001 product review product review product review 86 Model Aviation