Radio Conirol Giant Scale Bob Beckman ROPER ENGINES engines cov ered first engine report last month 37 Cu Roper impressive things about engine its large displacementto -physical-size ratio engine requires very little space Quadra yet has almost twice displacement Roper made USA its principal use chainsaw sold Sears has typical chainsaw appearance charac teristics including shaft extension comes out what us rear engine actually shaft drives chain usual application shaft extensions can good news bad news can complicate mounting answer being simply cut hole firewall let shaft stick through Thats bad sounds since gasoline burners arent messy glow engines other solution build buy mount holds engine far enough front firewall clear shaft good news about shaft natural coupling on-board starter system test engine electronic ignitionstand ard current engines some earlier versions use points ignition system quite effective no problems handstarting engine reason Gene Homer converts markets engine puts high-quality ball bearing prop end shaft virtually eliminates play bearing slop front shaft allows magneto set very close flywheel magnets closer magneto pole pieces flywheel magnets go hotter spark produced easier engine fire Performance figures given report last month will forthcoming get running time engine item interest new reed valve assembly have yet chance run Gene says 28 Model Aviation Realistic Models Stinson Voyager fuselage basic framework assembly foreground Lots plywood surprisingly light Model sized Quadra power Roper 37 Cu ifl engine amazingly compact its displacement also features pointless electronic ignition Photo above shows business endnote side-mounted carb strange looking knob sticking up cylinder head compressionrelease mechanism has proved little use airplane engine conversion Pictures below show quality parts workmanship left note two-ringed pIston pyramki reed valve bearing cap lower end conrodallows assembly one-piece crankshaft right below close-up old CL new R reed valve assembliesnew claimed add 500 rpm Old unit all-metal new plastic molding integral gasket metal reeds new reeds liahter seel better aaainst olastic new valve gave increase about 500 rpm test engine Ill reporting results soon can addition well soon have some larger props give us better idea what can get out engine Homers Sales also has available 19 Cu Roper engine fact believe first engine Gene made available have have yet chance look closely run will included engine test series According Gene engine usable well suited application 37 difficult hand-start Gene uses pulley/cord starter method engines biggest attraction price approximately $5000 gather supply limited 37 Roper pulled 25 lb 24-8 prop expect get that higherpitch props now have available equates adequate power models up 35- 40lb range available Homers Sales 300 Dixie Hwy Beecher IL 60401 Fly-in dates set 1981 dates three favorite affairs have announced Sacra mento Giant Scale Fly-in Merwin Ranch will three-day gathering June 19 20 21 STARS Spangied Scale Rally Olean NY set July 25 26 both IMAA-sanctioned events Hill Country Flyers Mammoth Scale Fly-in scheduled August 8 9 kinds events dont want miss Im planning make three look forward seeing possible Stinson Voyager kit Some time ago heard local Northern Virginia area modeler developing Giant Scale kit Stinson Voyager What head about Lester Putnam approach miniature aircraft construction kit design interesting enough looked him up Ive following progress ever since time read Continued page 107 iwo useruj accessories roryouruuaara rltz U Simple choke-plate shown inthe half-closed positiona lotof convenience foronlya buck R airclcaner/choke unit shown mounted Kioritz top cap can rotated have air intake face anydirection desired airstralnerpad inside can washed several times before needs replaced Bob tells source column May 1981 29 PATTERN AND 4 HIGH SPEED PROPELLERS AIRSCREW CuSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurale airfoil pitch Only high quality straight grain Eastern Maple used 8% X 6% FORMULA 14 lox 6 11X7 11X7/5 lixa CUSTOM DESIGN UPON REGUEST SIRUCT SALES pRoDucEs 5634 CRYSTAL COURTAdd 5100 00 oOe postage aO fleodlng SANTA Rosa 5404 PHONE TOT SASARSACA RES ADO 6% TAO NEW t Scale 1947 STINSON VOYAGER THANK YOU BILL Eastcalt LUCISO Start SLAte oITpd3telp dl $12995,Ied f Ic ,Ae CdT top quality aircraft has designed ground pre-cut interlocking aircraft-quality plywood AA balsa maximum strength easy construction tuuwarul ruv 29 1980 Wes Wafly & Dave MACS PRODUCTS 8020 18th Avenue Sacrernento CA 95826 Sleeping Bear/Flinn Continued page 27 badly want test desire sun starting set What view wait something happening wind As sun goes down does wind velocity lift plane Gradually plane becomes larger larger comes lower lower tell him Come Flinn keep telling Sailplane pilots can get up higher keep up longer dont know what keep up better frustrated reply Im doing Im doing Nothing Pat can will regain lost altitude Time 830 pm Close counts horseshoes Anything short 855 pm means whole day just practice plane continues lose altitude Cajoling has given way desperate prayer now 850 pm plane launch height probably 400 feet above heads rules state plane must land within 200 meters launching point qualifr ground crew calculates can just hang risk landing face dune short water would satisfactory rate descent would lessen Now plane down eye level flying parallel hugging face dune plane close could almost reach out grab wing tip plane floats just above stall speedusing last wisps lift wishes could take out ballast so close Comes 855 pm plane below top dune time complete what about plane Pat flies small ravine brings around up over edge within required closeness perfect finish 858 pm Wild cheering goes up ground crew observation deck Goods Vanderplows returned watch finish informed sightseers what happening real gallery up watching still daylight out open over lake shadow dune dark happy completely drained last hour real strain hike back seemed like miles successful day am sure could have made Saturday new day thermal soaring contest nearby Traverse City started early Pat Cloud 9 did everything right trying day Level V punctuated took first place 110-point margin Traverse City famous its Cherry Festival crops both sweet sour cherries Saturday night six couples four young sters dinner together celebrated various triumphs preceding week fresh cherry pie delicious end week will long remember sands Michigans Sleeping Bear Dunes Giant Scale/Beckman Continued page 29 Realistic Models will delivering kits picture Ive included doesnt really justice fuselage construction technique basic framework made precut plywood pieces go together like egg carton builds quickly its amost impossible go wrong Although structure -in plywood finished model surprisingly light Designed Quadra kit includes vibration-isolating motor mount assembly Continued page 110 NOW ThERES PRIMER RECOMMENDED FOR COVERITE New Primex solves nagging problem Now Can sure first time getting great adhesion Now remove masking tape paint job will stay down Primex ultra-light smooth very quick dry Easy apply brush extremely sandable Primex now primer use Coverite Super Permagloss & Silkspun equally great wood tissue silk nylon dacron Look bright yellow 9CGVERITEEJ L 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA ZONA SAWS famous line hobby saws Razor #200 $190 00 -$165 Saw set Replacement blades available dealer F Model Supply PO Box 3957 Torrance CA 90510 USA can R/G dealer May1981 107 REPUBLIC SEABEE MR Gs PRODUCTS 1010 Gratiot Box 161 Marysville MI 48040 Wing Span 70 Complete Hardware Epoxy Glaaa Retractable Gear 40 Powered Factora 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: 28, 29, 107, 110
Radio Conirol Giant Scale Bob Beckman ROPER ENGINES engines cov ered first engine report last month 37 Cu Roper impressive things about engine its large displacementto -physical-size ratio engine requires very little space Quadra yet has almost twice displacement Roper made USA its principal use chainsaw sold Sears has typical chainsaw appearance charac teristics including shaft extension comes out what us rear engine actually shaft drives chain usual application shaft extensions can good news bad news can complicate mounting answer being simply cut hole firewall let shaft stick through Thats bad sounds since gasoline burners arent messy glow engines other solution build buy mount holds engine far enough front firewall clear shaft good news about shaft natural coupling on-board starter system test engine electronic ignitionstand ard current engines some earlier versions use points ignition system quite effective no problems handstarting engine reason Gene Homer converts markets engine puts high-quality ball bearing prop end shaft virtually eliminates play bearing slop front shaft allows magneto set very close flywheel magnets closer magneto pole pieces flywheel magnets go hotter spark produced easier engine fire Performance figures given report last month will forthcoming get running time engine item interest new reed valve assembly have yet chance run Gene says 28 Model Aviation Realistic Models Stinson Voyager fuselage basic framework assembly foreground Lots plywood surprisingly light Model sized Quadra power Roper 37 Cu ifl engine amazingly compact its displacement also features pointless electronic ignition Photo above shows business endnote side-mounted carb strange looking knob sticking up cylinder head compressionrelease mechanism has proved little use airplane engine conversion Pictures below show quality parts workmanship left note two-ringed pIston pyramki reed valve bearing cap lower end conrodallows assembly one-piece crankshaft right below close-up old CL new R reed valve assembliesnew claimed add 500 rpm Old unit all-metal new plastic molding integral gasket metal reeds new reeds liahter seel better aaainst olastic new valve gave increase about 500 rpm test engine Ill reporting results soon can addition well soon have some larger props give us better idea what can get out engine Homers Sales also has available 19 Cu Roper engine fact believe first engine Gene made available have have yet chance look closely run will included engine test series According Gene engine usable well suited application 37 difficult hand-start Gene uses pulley/cord starter method engines biggest attraction price approximately $5000 gather supply limited 37 Roper pulled 25 lb 24-8 prop expect get that higherpitch props now have available equates adequate power models up 35- 40lb range available Homers Sales 300 Dixie Hwy Beecher IL 60401 Fly-in dates set 1981 dates three favorite affairs have announced Sacra mento Giant Scale Fly-in Merwin Ranch will three-day gathering June 19 20 21 STARS Spangied Scale Rally Olean NY set July 25 26 both IMAA-sanctioned events Hill Country Flyers Mammoth Scale Fly-in scheduled August 8 9 kinds events dont want miss Im planning make three look forward seeing possible Stinson Voyager kit Some time ago heard local Northern Virginia area modeler developing Giant Scale kit Stinson Voyager What head about Lester Putnam approach miniature aircraft construction kit design interesting enough looked him up Ive following progress ever since time read Continued page 107 iwo useruj accessories roryouruuaara rltz U Simple choke-plate shown inthe half-closed positiona lotof convenience foronlya buck R airclcaner/choke unit shown mounted Kioritz top cap can rotated have air intake face anydirection desired airstralnerpad inside can washed several times before needs replaced Bob tells source column May 1981 29 PATTERN AND 4 HIGH SPEED PROPELLERS AIRSCREW CuSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurale airfoil pitch Only high quality straight grain Eastern Maple used 8% X 6% FORMULA 14 lox 6 11X7 11X7/5 lixa CUSTOM DESIGN UPON REGUEST SIRUCT SALES pRoDucEs 5634 CRYSTAL COURTAdd 5100 00 oOe postage aO fleodlng SANTA Rosa 5404 PHONE TOT SASARSACA RES ADO 6% TAO NEW t Scale 1947 STINSON VOYAGER THANK YOU BILL Eastcalt LUCISO Start SLAte oITpd3telp dl $12995,Ied f Ic ,Ae CdT top quality aircraft has designed ground pre-cut interlocking aircraft-quality plywood AA balsa maximum strength easy construction tuuwarul ruv 29 1980 Wes Wafly & Dave MACS PRODUCTS 8020 18th Avenue Sacrernento CA 95826 Sleeping Bear/Flinn Continued page 27 badly want test desire sun starting set What view wait something happening wind As sun goes down does wind velocity lift plane Gradually plane becomes larger larger comes lower lower tell him Come Flinn keep telling Sailplane pilots can get up higher keep up longer dont know what keep up better frustrated reply Im doing Im doing Nothing Pat can will regain lost altitude Time 830 pm Close counts horseshoes Anything short 855 pm means whole day just practice plane continues lose altitude Cajoling has given way desperate prayer now 850 pm plane launch height probably 400 feet above heads rules state plane must land within 200 meters launching point qualifr ground crew calculates can just hang risk landing face dune short water would satisfactory rate descent would lessen Now plane down eye level flying parallel hugging face dune plane close could almost reach out grab wing tip plane floats just above stall speedusing last wisps lift wishes could take out ballast so close Comes 855 pm plane below top dune time complete what about plane Pat flies small ravine brings around up over edge within required closeness perfect finish 858 pm Wild cheering goes up ground crew observation deck Goods Vanderplows returned watch finish informed sightseers what happening real gallery up watching still daylight out open over lake shadow dune dark happy completely drained last hour real strain hike back seemed like miles successful day am sure could have made Saturday new day thermal soaring contest nearby Traverse City started early Pat Cloud 9 did everything right trying day Level V punctuated took first place 110-point margin Traverse City famous its Cherry Festival crops both sweet sour cherries Saturday night six couples four young sters dinner together celebrated various triumphs preceding week fresh cherry pie delicious end week will long remember sands Michigans Sleeping Bear Dunes Giant Scale/Beckman Continued page 29 Realistic Models will delivering kits picture Ive included doesnt really justice fuselage construction technique basic framework made precut plywood pieces go together like egg carton builds quickly its amost impossible go wrong Although structure -in plywood finished model surprisingly light Designed Quadra kit includes vibration-isolating motor mount assembly Continued page 110 NOW ThERES PRIMER RECOMMENDED FOR COVERITE New Primex solves nagging problem Now Can sure first time getting great adhesion Now remove masking tape paint job will stay down Primex ultra-light smooth very quick dry Easy apply brush extremely sandable Primex now primer use Coverite Super Permagloss & Silkspun equally great wood tissue silk nylon dacron Look bright yellow 9CGVERITEEJ L 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA ZONA SAWS famous line hobby saws Razor #200 $190 00 -$165 Saw set Replacement blades available dealer F Model Supply PO Box 3957 Torrance CA 90510 USA can R/G dealer May1981 107 REPUBLIC SEABEE MR Gs PRODUCTS 1010 Gratiot Box 161 Marysville MI 48040 Wing Span 70 Complete Hardware Epoxy Glaaa Retractable Gear 40 Powered Factora 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: 28, 29, 107, 110
Radio Conirol Giant Scale Bob Beckman ROPER ENGINES engines cov ered first engine report last month 37 Cu Roper impressive things about engine its large displacementto -physical-size ratio engine requires very little space Quadra yet has almost twice displacement Roper made USA its principal use chainsaw sold Sears has typical chainsaw appearance charac teristics including shaft extension comes out what us rear engine actually shaft drives chain usual application shaft extensions can good news bad news can complicate mounting answer being simply cut hole firewall let shaft stick through Thats bad sounds since gasoline burners arent messy glow engines other solution build buy mount holds engine far enough front firewall clear shaft good news about shaft natural coupling on-board starter system test engine electronic ignitionstand ard current engines some earlier versions use points ignition system quite effective no problems handstarting engine reason Gene Homer converts markets engine puts high-quality ball bearing prop end shaft virtually eliminates play bearing slop front shaft allows magneto set very close flywheel magnets closer magneto pole pieces flywheel magnets go hotter spark produced easier engine fire Performance figures given report last month will forthcoming get running time engine item interest new reed valve assembly have yet chance run Gene says 28 Model Aviation Realistic Models Stinson Voyager fuselage basic framework assembly foreground Lots plywood surprisingly light Model sized Quadra power Roper 37 Cu ifl engine amazingly compact its displacement also features pointless electronic ignition Photo above shows business endnote side-mounted carb strange looking knob sticking up cylinder head compressionrelease mechanism has proved little use airplane engine conversion Pictures below show quality parts workmanship left note two-ringed pIston pyramki reed valve bearing cap lower end conrodallows assembly one-piece crankshaft right below close-up old CL new R reed valve assembliesnew claimed add 500 rpm Old unit all-metal new plastic molding integral gasket metal reeds new reeds liahter seel better aaainst olastic new valve gave increase about 500 rpm test engine Ill reporting results soon can addition well soon have some larger props give us better idea what can get out engine Homers Sales also has available 19 Cu Roper engine fact believe first engine Gene made available have have yet chance look closely run will included engine test series According Gene engine usable well suited application 37 difficult hand-start Gene uses pulley/cord starter method engines biggest attraction price approximately $5000 gather supply limited 37 Roper pulled 25 lb 24-8 prop expect get that higherpitch props now have available equates adequate power models up 35- 40lb range available Homers Sales 300 Dixie Hwy Beecher IL 60401 Fly-in dates set 1981 dates three favorite affairs have announced Sacra mento Giant Scale Fly-in Merwin Ranch will three-day gathering June 19 20 21 STARS Spangied Scale Rally Olean NY set July 25 26 both IMAA-sanctioned events Hill Country Flyers Mammoth Scale Fly-in scheduled August 8 9 kinds events dont want miss Im planning make three look forward seeing possible Stinson Voyager kit Some time ago heard local Northern Virginia area modeler developing Giant Scale kit Stinson Voyager What head about Lester Putnam approach miniature aircraft construction kit design interesting enough looked him up Ive following progress ever since time read Continued page 107 iwo useruj accessories roryouruuaara rltz U Simple choke-plate shown inthe half-closed positiona lotof convenience foronlya buck R airclcaner/choke unit shown mounted Kioritz top cap can rotated have air intake face anydirection desired airstralnerpad inside can washed several times before needs replaced Bob tells source column May 1981 29 PATTERN AND 4 HIGH SPEED PROPELLERS AIRSCREW CuSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurale airfoil pitch Only high quality straight grain Eastern Maple used 8% X 6% FORMULA 14 lox 6 11X7 11X7/5 lixa CUSTOM DESIGN UPON REGUEST SIRUCT SALES pRoDucEs 5634 CRYSTAL COURTAdd 5100 00 oOe postage aO fleodlng SANTA Rosa 5404 PHONE TOT SASARSACA RES ADO 6% TAO NEW t Scale 1947 STINSON VOYAGER THANK YOU BILL Eastcalt LUCISO Start SLAte oITpd3telp dl $12995,Ied f Ic ,Ae CdT top quality aircraft has designed ground pre-cut interlocking aircraft-quality plywood AA balsa maximum strength easy construction tuuwarul ruv 29 1980 Wes Wafly & Dave MACS PRODUCTS 8020 18th Avenue Sacrernento CA 95826 Sleeping Bear/Flinn Continued page 27 badly want test desire sun starting set What view wait something happening wind As sun goes down does wind velocity lift plane Gradually plane becomes larger larger comes lower lower tell him Come Flinn keep telling Sailplane pilots can get up higher keep up longer dont know what keep up better frustrated reply Im doing Im doing Nothing Pat can will regain lost altitude Time 830 pm Close counts horseshoes Anything short 855 pm means whole day just practice plane continues lose altitude Cajoling has given way desperate prayer now 850 pm plane launch height probably 400 feet above heads rules state plane must land within 200 meters launching point qualifr ground crew calculates can just hang risk landing face dune short water would satisfactory rate descent would lessen Now plane down eye level flying parallel hugging face dune plane close could almost reach out grab wing tip plane floats just above stall speedusing last wisps lift wishes could take out ballast so close Comes 855 pm plane below top dune time complete what about plane Pat flies small ravine brings around up over edge within required closeness perfect finish 858 pm Wild cheering goes up ground crew observation deck Goods Vanderplows returned watch finish informed sightseers what happening real gallery up watching still daylight out open over lake shadow dune dark happy completely drained last hour real strain hike back seemed like miles successful day am sure could have made Saturday new day thermal soaring contest nearby Traverse City started early Pat Cloud 9 did everything right trying day Level V punctuated took first place 110-point margin Traverse City famous its Cherry Festival crops both sweet sour cherries Saturday night six couples four young sters dinner together celebrated various triumphs preceding week fresh cherry pie delicious end week will long remember sands Michigans Sleeping Bear Dunes Giant Scale/Beckman Continued page 29 Realistic Models will delivering kits picture Ive included doesnt really justice fuselage construction technique basic framework made precut plywood pieces go together like egg carton builds quickly its amost impossible go wrong Although structure -in plywood finished model surprisingly light Designed Quadra kit includes vibration-isolating motor mount assembly Continued page 110 NOW ThERES PRIMER RECOMMENDED FOR COVERITE New Primex solves nagging problem Now Can sure first time getting great adhesion Now remove masking tape paint job will stay down Primex ultra-light smooth very quick dry Easy apply brush extremely sandable Primex now primer use Coverite Super Permagloss & Silkspun equally great wood tissue silk nylon dacron Look bright yellow 9CGVERITEEJ L 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA ZONA SAWS famous line hobby saws Razor #200 $190 00 -$165 Saw set Replacement blades available dealer F Model Supply PO Box 3957 Torrance CA 90510 USA can R/G dealer May1981 107 REPUBLIC SEABEE MR Gs PRODUCTS 1010 Gratiot Box 161 Marysville MI 48040 Wing Span 70 Complete Hardware Epoxy Glaaa Retractable Gear 40 Powered Factora 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: 28, 29, 107, 110
Radio Conirol Giant Scale Bob Beckman ROPER ENGINES engines cov ered first engine report last month 37 Cu Roper impressive things about engine its large displacementto -physical-size ratio engine requires very little space Quadra yet has almost twice displacement Roper made USA its principal use chainsaw sold Sears has typical chainsaw appearance charac teristics including shaft extension comes out what us rear engine actually shaft drives chain usual application shaft extensions can good news bad news can complicate mounting answer being simply cut hole firewall let shaft stick through Thats bad sounds since gasoline burners arent messy glow engines other solution build buy mount holds engine far enough front firewall clear shaft good news about shaft natural coupling on-board starter system test engine electronic ignitionstand ard current engines some earlier versions use points ignition system quite effective no problems handstarting engine reason Gene Homer converts markets engine puts high-quality ball bearing prop end shaft virtually eliminates play bearing slop front shaft allows magneto set very close flywheel magnets closer magneto pole pieces flywheel magnets go hotter spark produced easier engine fire Performance figures given report last month will forthcoming get running time engine item interest new reed valve assembly have yet chance run Gene says 28 Model Aviation Realistic Models Stinson Voyager fuselage basic framework assembly foreground Lots plywood surprisingly light Model sized Quadra power Roper 37 Cu ifl engine amazingly compact its displacement also features pointless electronic ignition Photo above shows business endnote side-mounted carb strange looking knob sticking up cylinder head compressionrelease mechanism has proved little use airplane engine conversion Pictures below show quality parts workmanship left note two-ringed pIston pyramki reed valve bearing cap lower end conrodallows assembly one-piece crankshaft right below close-up old CL new R reed valve assembliesnew claimed add 500 rpm Old unit all-metal new plastic molding integral gasket metal reeds new reeds liahter seel better aaainst olastic new valve gave increase about 500 rpm test engine Ill reporting results soon can addition well soon have some larger props give us better idea what can get out engine Homers Sales also has available 19 Cu Roper engine fact believe first engine Gene made available have have yet chance look closely run will included engine test series According Gene engine usable well suited application 37 difficult hand-start Gene uses pulley/cord starter method engines biggest attraction price approximately $5000 gather supply limited 37 Roper pulled 25 lb 24-8 prop expect get that higherpitch props now have available equates adequate power models up 35- 40lb range available Homers Sales 300 Dixie Hwy Beecher IL 60401 Fly-in dates set 1981 dates three favorite affairs have announced Sacra mento Giant Scale Fly-in Merwin Ranch will three-day gathering June 19 20 21 STARS Spangied Scale Rally Olean NY set July 25 26 both IMAA-sanctioned events Hill Country Flyers Mammoth Scale Fly-in scheduled August 8 9 kinds events dont want miss Im planning make three look forward seeing possible Stinson Voyager kit Some time ago heard local Northern Virginia area modeler developing Giant Scale kit Stinson Voyager What head about Lester Putnam approach miniature aircraft construction kit design interesting enough looked him up Ive following progress ever since time read Continued page 107 iwo useruj accessories roryouruuaara rltz U Simple choke-plate shown inthe half-closed positiona lotof convenience foronlya buck R airclcaner/choke unit shown mounted Kioritz top cap can rotated have air intake face anydirection desired airstralnerpad inside can washed several times before needs replaced Bob tells source column May 1981 29 PATTERN AND 4 HIGH SPEED PROPELLERS AIRSCREW CuSTOM HIGH PERFORMANCE MAPLE PROPELLERS Propeller designed using symmetrical profile Individually precision hand balanced Accurale airfoil pitch Only high quality straight grain Eastern Maple used 8% X 6% FORMULA 14 lox 6 11X7 11X7/5 lixa CUSTOM DESIGN UPON REGUEST SIRUCT SALES pRoDucEs 5634 CRYSTAL COURTAdd 5100 00 oOe postage aO fleodlng SANTA Rosa 5404 PHONE TOT SASARSACA RES ADO 6% TAO NEW t Scale 1947 STINSON VOYAGER THANK YOU BILL Eastcalt LUCISO Start SLAte oITpd3telp dl $12995,Ied f Ic ,Ae CdT top quality aircraft has designed ground pre-cut interlocking aircraft-quality plywood AA balsa maximum strength easy construction tuuwarul ruv 29 1980 Wes Wafly & Dave MACS PRODUCTS 8020 18th Avenue Sacrernento CA 95826 Sleeping Bear/Flinn Continued page 27 badly want test desire sun starting set What view wait something happening wind As sun goes down does wind velocity lift plane Gradually plane becomes larger larger comes lower lower tell him Come Flinn keep telling Sailplane pilots can get up higher keep up longer dont know what keep up better frustrated reply Im doing Im doing Nothing Pat can will regain lost altitude Time 830 pm Close counts horseshoes Anything short 855 pm means whole day just practice plane continues lose altitude Cajoling has given way desperate prayer now 850 pm plane launch height probably 400 feet above heads rules state plane must land within 200 meters launching point qualifr ground crew calculates can just hang risk landing face dune short water would satisfactory rate descent would lessen Now plane down eye level flying parallel hugging face dune plane close could almost reach out grab wing tip plane floats just above stall speedusing last wisps lift wishes could take out ballast so close Comes 855 pm plane below top dune time complete what about plane Pat flies small ravine brings around up over edge within required closeness perfect finish 858 pm Wild cheering goes up ground crew observation deck Goods Vanderplows returned watch finish informed sightseers what happening real gallery up watching still daylight out open over lake shadow dune dark happy completely drained last hour real strain hike back seemed like miles successful day am sure could have made Saturday new day thermal soaring contest nearby Traverse City started early Pat Cloud 9 did everything right trying day Level V punctuated took first place 110-point margin Traverse City famous its Cherry Festival crops both sweet sour cherries Saturday night six couples four young sters dinner together celebrated various triumphs preceding week fresh cherry pie delicious end week will long remember sands Michigans Sleeping Bear Dunes Giant Scale/Beckman Continued page 29 Realistic Models will delivering kits picture Ive included doesnt really justice fuselage construction technique basic framework made precut plywood pieces go together like egg carton builds quickly its amost impossible go wrong Although structure -in plywood finished model surprisingly light Designed Quadra kit includes vibration-isolating motor mount assembly Continued page 110 NOW ThERES PRIMER RECOMMENDED FOR COVERITE New Primex solves nagging problem Now Can sure first time getting great adhesion Now remove masking tape paint job will stay down Primex ultra-light smooth very quick dry Easy apply brush extremely sandable Primex now primer use Coverite Super Permagloss & Silkspun equally great wood tissue silk nylon dacron Look bright yellow 9CGVERITEEJ L 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA ZONA SAWS famous line hobby saws Razor #200 $190 00 -$165 Saw set Replacement blades available dealer F Model Supply PO Box 3957 Torrance CA 90510 USA can R/G dealer May1981 107 REPUBLIC SEABEE MR Gs PRODUCTS 1010 Gratiot Box 161 Marysville MI 48040 Wing Span 70 Complete Hardware Epoxy Glaaa Retractable Gear 40 Powered Factora 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