Radio C onE rot Sport Aerobatics Ron Van Putte JUST AFTER sending last column received long delightful letter Greg Lovick Grapevine TX subject pro pellers Since several previous columns dealt propellers readers wrote either agree straighten out what written still believe everything appeared print technically accurate Anyway Gregs letter printed cap off discussion propellers still prefer continue discussions after reading following letter feel free write Greg wrote February 1981 column Model Aviation promised discussion percentage prop thrust due front rear blade surfaces printed March Maybe already agree other first line reasoning might applied based Rankine-Froude mo mentum theory assumed propel ler acted magical bladeless disc could act air passing through produce increase velocity Textbooks will show attendant math one-half air velocity change produced disc propel ler gained before air moving through disc reached disc other half velocity change shows up behind disc Thus model flying 60mph speed prop blast measured tail 80 mph air velocity seen prop 70 mph Going step further drop air pressure just ahead prop equal rise air pressure just behind prop builds pretty good case saying front rear surfaces prop produce 50% thrust problem explanation cant fly just bottom surface prop just top unavoidably inseparable must have asking wrong question Perhaps better question can answered Which side propeller has greatest potential destroying lift thrust produced prop Just wing lower surface distorted drag produced will increase lifting ability virtually unchanged However upper sur face distorted airfoil will stall lower angle attack lifting ability will severely reduced some cases 50% argument says front ofthe blade can cost us half thrust does say front surface produces half thrust Let cut through own baloney toss out own conclusions 1 As long insist flying aerobatics throttled engines $200 fixed-pitch propel lers going stuck lousy efficien cy million-dollar research program make technical-overkill molded prop cannot provide prop will highly efficient flight modes single engine/model combination 2 Any method measuring pitch OK used compare blade new prop good standard design modelers real prob lem variation manufacturing can afford test-fly dozen props model discover brand/pitch/diameter works best problem no two individual props really indenticai $2 may never 3 balancing prop screwing up front blade can hurt worse screwing up back bladeand touch-up fine sandpaper over blade wouldnt hurt 4 little attention paid weight general aerodynamic cleanliness airplane will lot good increasing apparent englne performance Zinger-sawing Rev-Up-bashing can advice poten tial Pattern propeller-modifiers leave halfpound paint glue sawdust ground Hawks Birds muuu 30 Model Aviation Team demonstrated formation flying during air show conclusion 1980 Nats Fran Cranes Blue -a Ken Willard design Team member Jack Coulson holds photo have also getting lot letters about Agony Defeat letter published February 1981 column Much surprise letter writers dont have much sympathy author concensus author novice expected instant success effort required get typical letter included lines have never met modeler unwilling help approached right attitude person has able get 30 minutes sticks two years trying can wonder about attitude Okay Ill buy claim some reasons guys lack success probably lie him until youve visited another club stranger taken good look own through strangers eyes probably havent seen just really relate beginners Take good look club treat someone drives up flying site stands behind flight line just watching hour club members will ignore him right Would some less cordial can remember trip made govemment stranded strange city weekend nothing found local flying site spent some time just watching introducing myself amazement club member came up told might well leave because didnt allow strangers fly field Can believe — LOW PLUG TAOTA May1981 31 use stock props Lets try scenario Pretend wing looks like propeller Did another Footnote Gossamer Penguin solar-pow- beginner drive up club field laugh point out $12 engine ered airplane weighs 170 lbs flies twin poorly constructed model containing bargain EL Cheapo radio Did get ignored Astro 25 swe have lot learn engine discount-house radio people could really help because Greg did beautiful job capturing club members treat Did just hear too busy can say no important items relative propeller perform- club experts make ajoking comment about Continued page 110 ance really appreciate SCALE INSTRUMENTS ENGINE TEST UNIT Pocket Booster CarTy pocket BATTERY CHARGER complete package metal dma glasses taco platea SJzes L dia Kirk wickers Deception Pattern model receives lots ris Thompson L after 1980 Nats flight Tuned pipe rear-exhaust OS 60 emerges aft part canopy Kirks right Universal manifold fit cowling prob ieee Select tail tube required Three sizes OS.19.29-dll45.50 unit br bench running Ad br /A 80 gnomes ENGINE MUFFLERS Peace Pipe classic design 2840 engines PITTS Designed PITTS CESSNA 160 type alrcralt ua eI2ea 29-dll 45.60 l/2ASO Eliminates end directs messy exhaust oil awsy trom plane Rear exhaust muff lore fog K&B35cc KU 76cc KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Aluminum n Endorsed Don Godfrey Phone 607 722-1765 Pro-Drilled Props Available Ask About Custom Built KIORITZ Engines fiberglass cowl vacuum-formed control surfaces wheel pants other accessories beautifully done Les prototype has flown no usual new-plane teething troubles les sons learned have already cranked kit will half-dozen around spring including Im going build Ill let know goes Quadra Kioritz chokes running engine tests Quadra Kioritz Kirby Crawford found use same size Walbro carb both suffer lack choke heard Dario Brisighella has add-on choke Quadra got touch him has choke has two different versions simply plastic choke plate lever mounts under white Carb Needles &Throttle Accessible Engine Running Points Sealed Rear Housing ENGINES BY GIBBS HOBBY & RESEARCH 6195 Hillfield StNW NCANTON OHIO 44720 Phone216 499-8854 After 600 PM $189 Pre-Paid Orders Pay Shipping Dealer Inquiries Welcome Year Limited Accept Visa & Master Card plastic molding comes Quadra carb other really air cleaner built-in choke Prices $100 $495respectively air cleaner version fits nicely Kioritz few minor changes havent chance run yet expect help both choke problem fuel consumption figures Kioritz want chokes Quadra-related items write Dario G Rn sighella Sr 1032 East Manitowoc Ave Oak Creek WI 53154 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 SAFE FLYING IS NO ACCIDENT GIBBS HOBBY & RESEARCH Original Developer Factory Trained Authorized Master Service Dealer PFI FICAT IONS 242 CU ifl C397C0 32 HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Carb 3 Ring Piston RC Aerobatics/Van Putte Continued page 31 questions Id love beginner club However said yes questions club probably unusual Next time stranger visits club field take good look fellow club members treat him youd happy treatment congratulations affirmative club policy change order Golden Rule good place start Ron Van Putte 111 Sleepy Oaks Road Fort Walton Beach FL 32548 RC Soaring/Pruss Continued page 33 11-19 are dates Canadian Nationals Theyll held Ontario Huron Park Classes include Two-Meter Stand-Off Scale task will Triatholon Details being worked out hold LSF Tournament Chicago area July27 through 31 ties SOARs 76 km Great Race VI scheduled July25 26 Scheduled July 27 28 one-task event will F3B Distance task Rules will per book except will no limit number laps last three days Precision Duration will flownfour rounds ninth round wild card round Details later can head AMA Nationals San Antonio first week August servos still working after theres good chance wont Nice guys finish first Over years seems modelers top competition heap always ones open about building secrets Names could printed go back couple generations names would cover categories model aviation last Soaring column mention made 1SF International Soaring Forum Made up some modelings finest craftsmen technicians 1SF formed further study construction techniques airfoil develop ment Sailplane design performance Han Schlapfer Switzerland Fnidolin Fritz Austria two gents shop tool boxes always open Rick Schramek San Francisco has opportunity visit gents few occasionsand peek shops tool boxes spend time during flight tests has also brought back some interesting building techniques list materials used turn out exotic birds isnt say answers making Worldheater 12 youre looking molded wing techniques epoxy molds other not-so-standard building pro cedures Rick has some offerings Hell passing interesting information future columns Stay tuned New Clubs Southern Nevada Soaring Society Joseph M Welch 5813 Mary Way Las Vegas NV 89108 Galesbung RC Modelers Noel Garrett Box 106 Abingdon IL 61410 Dan Pruss RR 2 Box 49D Plainfield IL 60544 IWhen writing advertiseui mention read about Model Aviation 110 Model Aviation colorful Gee Bee Z first barrel-shaped racers constructed Granville Brothers Springfield Massachusetts During 1931 won five races including prestigious Thompson Trophy Cleveland Ohio National Air Races Z also direct forerunner famous Gee Bee R-1 R-2 FEATURES TWO TYPES OF COWLINGS TWO TYPES OF WHEELS HARD AND FLEXIBLE TIRES ILED INTERIOR Send $1 complete illustrated catalog DEPT MA 181 PAWNEE ST SAN MARCOS CALIFORNIA 92069
Edition: Model Aviation - 1981/05
Page Numbers: 30, 31, 110
Radio C onE rot Sport Aerobatics Ron Van Putte JUST AFTER sending last column received long delightful letter Greg Lovick Grapevine TX subject pro pellers Since several previous columns dealt propellers readers wrote either agree straighten out what written still believe everything appeared print technically accurate Anyway Gregs letter printed cap off discussion propellers still prefer continue discussions after reading following letter feel free write Greg wrote February 1981 column Model Aviation promised discussion percentage prop thrust due front rear blade surfaces printed March Maybe already agree other first line reasoning might applied based Rankine-Froude mo mentum theory assumed propel ler acted magical bladeless disc could act air passing through produce increase velocity Textbooks will show attendant math one-half air velocity change produced disc propel ler gained before air moving through disc reached disc other half velocity change shows up behind disc Thus model flying 60mph speed prop blast measured tail 80 mph air velocity seen prop 70 mph Going step further drop air pressure just ahead prop equal rise air pressure just behind prop builds pretty good case saying front rear surfaces prop produce 50% thrust problem explanation cant fly just bottom surface prop just top unavoidably inseparable must have asking wrong question Perhaps better question can answered Which side propeller has greatest potential destroying lift thrust produced prop Just wing lower surface distorted drag produced will increase lifting ability virtually unchanged However upper sur face distorted airfoil will stall lower angle attack lifting ability will severely reduced some cases 50% argument says front ofthe blade can cost us half thrust does say front surface produces half thrust Let cut through own baloney toss out own conclusions 1 As long insist flying aerobatics throttled engines $200 fixed-pitch propel lers going stuck lousy efficien cy million-dollar research program make technical-overkill molded prop cannot provide prop will highly efficient flight modes single engine/model combination 2 Any method measuring pitch OK used compare blade new prop good standard design modelers real prob lem variation manufacturing can afford test-fly dozen props model discover brand/pitch/diameter works best problem no two individual props really indenticai $2 may never 3 balancing prop screwing up front blade can hurt worse screwing up back bladeand touch-up fine sandpaper over blade wouldnt hurt 4 little attention paid weight general aerodynamic cleanliness airplane will lot good increasing apparent englne performance Zinger-sawing Rev-Up-bashing can advice poten tial Pattern propeller-modifiers leave halfpound paint glue sawdust ground Hawks Birds muuu 30 Model Aviation Team demonstrated formation flying during air show conclusion 1980 Nats Fran Cranes Blue -a Ken Willard design Team member Jack Coulson holds photo have also getting lot letters about Agony Defeat letter published February 1981 column Much surprise letter writers dont have much sympathy author concensus author novice expected instant success effort required get typical letter included lines have never met modeler unwilling help approached right attitude person has able get 30 minutes sticks two years trying can wonder about attitude Okay Ill buy claim some reasons guys lack success probably lie him until youve visited another club stranger taken good look own through strangers eyes probably havent seen just really relate beginners Take good look club treat someone drives up flying site stands behind flight line just watching hour club members will ignore him right Would some less cordial can remember trip made govemment stranded strange city weekend nothing found local flying site spent some time just watching introducing myself amazement club member came up told might well leave because didnt allow strangers fly field Can believe — LOW PLUG TAOTA May1981 31 use stock props Lets try scenario Pretend wing looks like propeller Did another Footnote Gossamer Penguin solar-pow- beginner drive up club field laugh point out $12 engine ered airplane weighs 170 lbs flies twin poorly constructed model containing bargain EL Cheapo radio Did get ignored Astro 25 swe have lot learn engine discount-house radio people could really help because Greg did beautiful job capturing club members treat Did just hear too busy can say no important items relative propeller perform- club experts make ajoking comment about Continued page 110 ance really appreciate SCALE INSTRUMENTS ENGINE TEST UNIT Pocket Booster CarTy pocket BATTERY CHARGER complete package metal dma glasses taco platea SJzes L dia Kirk wickers Deception Pattern model receives lots ris Thompson L after 1980 Nats flight Tuned pipe rear-exhaust OS 60 emerges aft part canopy Kirks right Universal manifold fit cowling prob ieee Select tail tube required Three sizes OS.19.29-dll45.50 unit br bench running Ad br /A 80 gnomes ENGINE MUFFLERS Peace Pipe classic design 2840 engines PITTS Designed PITTS CESSNA 160 type alrcralt ua eI2ea 29-dll 45.60 l/2ASO Eliminates end directs messy exhaust oil awsy trom plane Rear exhaust muff lore fog K&B35cc KU 76cc KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Aluminum n Endorsed Don Godfrey Phone 607 722-1765 Pro-Drilled Props Available Ask About Custom Built KIORITZ Engines fiberglass cowl vacuum-formed control surfaces wheel pants other accessories beautifully done Les prototype has flown no usual new-plane teething troubles les sons learned have already cranked kit will half-dozen around spring including Im going build Ill let know goes Quadra Kioritz chokes running engine tests Quadra Kioritz Kirby Crawford found use same size Walbro carb both suffer lack choke heard Dario Brisighella has add-on choke Quadra got touch him has choke has two different versions simply plastic choke plate lever mounts under white Carb Needles &Throttle Accessible Engine Running Points Sealed Rear Housing ENGINES BY GIBBS HOBBY & RESEARCH 6195 Hillfield StNW NCANTON OHIO 44720 Phone216 499-8854 After 600 PM $189 Pre-Paid Orders Pay Shipping Dealer Inquiries Welcome Year Limited Accept Visa & Master Card plastic molding comes Quadra carb other really air cleaner built-in choke Prices $100 $495respectively air cleaner version fits nicely Kioritz few minor changes havent chance run yet expect help both choke problem fuel consumption figures Kioritz want chokes Quadra-related items write Dario G Rn sighella Sr 1032 East Manitowoc Ave Oak Creek WI 53154 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 SAFE FLYING IS NO ACCIDENT GIBBS HOBBY & RESEARCH Original Developer Factory Trained Authorized Master Service Dealer PFI FICAT IONS 242 CU ifl C397C0 32 HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Carb 3 Ring Piston RC Aerobatics/Van Putte Continued page 31 questions Id love beginner club However said yes questions club probably unusual Next time stranger visits club field take good look fellow club members treat him youd happy treatment congratulations affirmative club policy change order Golden Rule good place start Ron Van Putte 111 Sleepy Oaks Road Fort Walton Beach FL 32548 RC Soaring/Pruss Continued page 33 11-19 are dates Canadian Nationals Theyll held Ontario Huron Park Classes include Two-Meter Stand-Off Scale task will Triatholon Details being worked out hold LSF Tournament Chicago area July27 through 31 ties SOARs 76 km Great Race VI scheduled July25 26 Scheduled July 27 28 one-task event will F3B Distance task Rules will per book except will no limit number laps last three days Precision Duration will flownfour rounds ninth round wild card round Details later can head AMA Nationals San Antonio first week August servos still working after theres good chance wont Nice guys finish first Over years seems modelers top competition heap always ones open about building secrets Names could printed go back couple generations names would cover categories model aviation last Soaring column mention made 1SF International Soaring Forum Made up some modelings finest craftsmen technicians 1SF formed further study construction techniques airfoil develop ment Sailplane design performance Han Schlapfer Switzerland Fnidolin Fritz Austria two gents shop tool boxes always open Rick Schramek San Francisco has opportunity visit gents few occasionsand peek shops tool boxes spend time during flight tests has also brought back some interesting building techniques list materials used turn out exotic birds isnt say answers making Worldheater 12 youre looking molded wing techniques epoxy molds other not-so-standard building pro cedures Rick has some offerings Hell passing interesting information future columns Stay tuned New Clubs Southern Nevada Soaring Society Joseph M Welch 5813 Mary Way Las Vegas NV 89108 Galesbung RC Modelers Noel Garrett Box 106 Abingdon IL 61410 Dan Pruss RR 2 Box 49D Plainfield IL 60544 IWhen writing advertiseui mention read about Model Aviation 110 Model Aviation colorful Gee Bee Z first barrel-shaped racers constructed Granville Brothers Springfield Massachusetts During 1931 won five races including prestigious Thompson Trophy Cleveland Ohio National Air Races Z also direct forerunner famous Gee Bee R-1 R-2 FEATURES TWO TYPES OF COWLINGS TWO TYPES OF WHEELS HARD AND FLEXIBLE TIRES ILED INTERIOR Send $1 complete illustrated catalog DEPT MA 181 PAWNEE ST SAN MARCOS CALIFORNIA 92069
Edition: Model Aviation - 1981/05
Page Numbers: 30, 31, 110
Radio C onE rot Sport Aerobatics Ron Van Putte JUST AFTER sending last column received long delightful letter Greg Lovick Grapevine TX subject pro pellers Since several previous columns dealt propellers readers wrote either agree straighten out what written still believe everything appeared print technically accurate Anyway Gregs letter printed cap off discussion propellers still prefer continue discussions after reading following letter feel free write Greg wrote February 1981 column Model Aviation promised discussion percentage prop thrust due front rear blade surfaces printed March Maybe already agree other first line reasoning might applied based Rankine-Froude mo mentum theory assumed propel ler acted magical bladeless disc could act air passing through produce increase velocity Textbooks will show attendant math one-half air velocity change produced disc propel ler gained before air moving through disc reached disc other half velocity change shows up behind disc Thus model flying 60mph speed prop blast measured tail 80 mph air velocity seen prop 70 mph Going step further drop air pressure just ahead prop equal rise air pressure just behind prop builds pretty good case saying front rear surfaces prop produce 50% thrust problem explanation cant fly just bottom surface prop just top unavoidably inseparable must have asking wrong question Perhaps better question can answered Which side propeller has greatest potential destroying lift thrust produced prop Just wing lower surface distorted drag produced will increase lifting ability virtually unchanged However upper sur face distorted airfoil will stall lower angle attack lifting ability will severely reduced some cases 50% argument says front ofthe blade can cost us half thrust does say front surface produces half thrust Let cut through own baloney toss out own conclusions 1 As long insist flying aerobatics throttled engines $200 fixed-pitch propel lers going stuck lousy efficien cy million-dollar research program make technical-overkill molded prop cannot provide prop will highly efficient flight modes single engine/model combination 2 Any method measuring pitch OK used compare blade new prop good standard design modelers real prob lem variation manufacturing can afford test-fly dozen props model discover brand/pitch/diameter works best problem no two individual props really indenticai $2 may never 3 balancing prop screwing up front blade can hurt worse screwing up back bladeand touch-up fine sandpaper over blade wouldnt hurt 4 little attention paid weight general aerodynamic cleanliness airplane will lot good increasing apparent englne performance Zinger-sawing Rev-Up-bashing can advice poten tial Pattern propeller-modifiers leave halfpound paint glue sawdust ground Hawks Birds muuu 30 Model Aviation Team demonstrated formation flying during air show conclusion 1980 Nats Fran Cranes Blue -a Ken Willard design Team member Jack Coulson holds photo have also getting lot letters about Agony Defeat letter published February 1981 column Much surprise letter writers dont have much sympathy author concensus author novice expected instant success effort required get typical letter included lines have never met modeler unwilling help approached right attitude person has able get 30 minutes sticks two years trying can wonder about attitude Okay Ill buy claim some reasons guys lack success probably lie him until youve visited another club stranger taken good look own through strangers eyes probably havent seen just really relate beginners Take good look club treat someone drives up flying site stands behind flight line just watching hour club members will ignore him right Would some less cordial can remember trip made govemment stranded strange city weekend nothing found local flying site spent some time just watching introducing myself amazement club member came up told might well leave because didnt allow strangers fly field Can believe — LOW PLUG TAOTA May1981 31 use stock props Lets try scenario Pretend wing looks like propeller Did another Footnote Gossamer Penguin solar-pow- beginner drive up club field laugh point out $12 engine ered airplane weighs 170 lbs flies twin poorly constructed model containing bargain EL Cheapo radio Did get ignored Astro 25 swe have lot learn engine discount-house radio people could really help because Greg did beautiful job capturing club members treat Did just hear too busy can say no important items relative propeller perform- club experts make ajoking comment about Continued page 110 ance really appreciate SCALE INSTRUMENTS ENGINE TEST UNIT Pocket Booster CarTy pocket BATTERY CHARGER complete package metal dma glasses taco platea SJzes L dia Kirk wickers Deception Pattern model receives lots ris Thompson L after 1980 Nats flight Tuned pipe rear-exhaust OS 60 emerges aft part canopy Kirks right Universal manifold fit cowling prob ieee Select tail tube required Three sizes OS.19.29-dll45.50 unit br bench running Ad br /A 80 gnomes ENGINE MUFFLERS Peace Pipe classic design 2840 engines PITTS Designed PITTS CESSNA 160 type alrcralt ua eI2ea 29-dll 45.60 l/2ASO Eliminates end directs messy exhaust oil awsy trom plane Rear exhaust muff lore fog K&B35cc KU 76cc KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small Magneto 1 5/am Aluminum n Endorsed Don Godfrey Phone 607 722-1765 Pro-Drilled Props Available Ask About Custom Built KIORITZ Engines fiberglass cowl vacuum-formed control surfaces wheel pants other accessories beautifully done Les prototype has flown no usual new-plane teething troubles les sons learned have already cranked kit will half-dozen around spring including Im going build Ill let know goes Quadra Kioritz chokes running engine tests Quadra Kioritz Kirby Crawford found use same size Walbro carb both suffer lack choke heard Dario Brisighella has add-on choke Quadra got touch him has choke has two different versions simply plastic choke plate lever mounts under white Carb Needles &Throttle Accessible Engine Running Points Sealed Rear Housing ENGINES BY GIBBS HOBBY & RESEARCH 6195 Hillfield StNW NCANTON OHIO 44720 Phone216 499-8854 After 600 PM $189 Pre-Paid Orders Pay Shipping Dealer Inquiries Welcome Year Limited Accept Visa & Master Card plastic molding comes Quadra carb other really air cleaner built-in choke Prices $100 $495respectively air cleaner version fits nicely Kioritz few minor changes havent chance run yet expect help both choke problem fuel consumption figures Kioritz want chokes Quadra-related items write Dario G Rn sighella Sr 1032 East Manitowoc Ave Oak Creek WI 53154 Bob Beckman 8248 Holly Grove Court Manassas VA 22110 SAFE FLYING IS NO ACCIDENT GIBBS HOBBY & RESEARCH Original Developer Factory Trained Authorized Master Service Dealer PFI FICAT IONS 242 CU ifl C397C0 32 HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Carb 3 Ring Piston RC Aerobatics/Van Putte Continued page 31 questions Id love beginner club However said yes questions club probably unusual Next time stranger visits club field take good look fellow club members treat him youd happy treatment congratulations affirmative club policy change order Golden Rule good place start Ron Van Putte 111 Sleepy Oaks Road Fort Walton Beach FL 32548 RC Soaring/Pruss Continued page 33 11-19 are dates Canadian Nationals Theyll held Ontario Huron Park Classes include Two-Meter Stand-Off Scale task will Triatholon Details being worked out hold LSF Tournament Chicago area July27 through 31 ties SOARs 76 km Great Race VI scheduled July25 26 Scheduled July 27 28 one-task event will F3B Distance task Rules will per book except will no limit number laps last three days Precision Duration will flownfour rounds ninth round wild card round Details later can head AMA Nationals San Antonio first week August servos still working after theres good chance wont Nice guys finish first Over years seems modelers top competition heap always ones open about building secrets Names could printed go back couple generations names would cover categories model aviation last Soaring column mention made 1SF International Soaring Forum Made up some modelings finest craftsmen technicians 1SF formed further study construction techniques airfoil develop ment Sailplane design performance Han Schlapfer Switzerland Fnidolin Fritz Austria two gents shop tool boxes always open Rick Schramek San Francisco has opportunity visit gents few occasionsand peek shops tool boxes spend time during flight tests has also brought back some interesting building techniques list materials used turn out exotic birds isnt say answers making Worldheater 12 youre looking molded wing techniques epoxy molds other not-so-standard building pro cedures Rick has some offerings Hell passing interesting information future columns Stay tuned New Clubs Southern Nevada Soaring Society Joseph M Welch 5813 Mary Way Las Vegas NV 89108 Galesbung RC Modelers Noel Garrett Box 106 Abingdon IL 61410 Dan Pruss RR 2 Box 49D Plainfield IL 60544 IWhen writing advertiseui mention read about Model Aviation 110 Model Aviation colorful Gee Bee Z first barrel-shaped racers constructed Granville Brothers Springfield Massachusetts During 1931 won five races including prestigious Thompson Trophy Cleveland Ohio National Air Races Z also direct forerunner famous Gee Bee R-1 R-2 FEATURES TWO TYPES OF COWLINGS TWO TYPES OF WHEELS HARD AND FLEXIBLE TIRES ILED INTERIOR Send $1 complete illustrated catalog DEPT MA 181 PAWNEE ST SAN MARCOS CALIFORNIA 92069