Radio Control SOARING Dan Pruss 42 Model Aviation USA RC Soaring forum April column mention made Soar Tech set papers available through Herk Stok ley Mentioned also Switzerlands anAutomatic line-retrievers becoming standard equipment contest work quiet efficient compared dirt bikes motorcycles drivers fees etc Photo Dave Corven dress Detroit Sno-Fli sometimes open shirt sun glasses no glovesbut downfilled jacket just case CD controls preregistrations Ken Bates shows off originaldesign Standard class 1 00-in E-203 craft Dave Corven photo nual International RC Soaring Flight Forum 1SF Both contributions soaring have stirred imagination quite few folks US As suggested end column surely room similar forum column being prepared Al Scidmore Madison WI already formu e Michigans Joe Feather launches 2-Meter Icarus Pic Dave Corven Ray Hayes Indiana resident launches Bird ot Time Meet used two winches its own automatic towline retrieval system gave nearly 250 launches 6 hours Dave Corven photograph lating such idea Dates arent firm yet plans being made hold forum first part November 1983 What will program depends what can contribute forum being planned modelers modelers will base exchanging ideas course will excellent opportunity just gathering information Some ideas Al discussed hoped modelers would present include mold-making construction tech niques foam cutting design theories airfoil discussions would good op portunity thick airfoil advocates debate thin airfoil scholars Continued page 148 July 1983 43 5outh Africas winningest sailplane Andy Keil Skybird has won consecutive South African Nats last world champswill York England year Below clever way joining stabilizer halves Du-Bro ball link end joiner-rod snaps ball socket buried other stab Below left see wing blade joiner Andys craft Full-scale technique gives max strength good alignment Photos Keil iwr Ir-LIflD 5CHANNEL SYSTEM K-Line imported radio control systems Kraft manufactured tested Krafts specifications provide inexpensive radios same solid record reliability made Kraft plant Vista California THE KP5K 5-CHANNEL R/O SYSTEM FEATURES Smooth precise feel gimbals ratcheted trims Dual rate switches Built-in telescoping antenna Impact resistant Kraft gold color case Double-tuned high sensitivity receiver plug-in crystal Full NiCads dual LED charger complete accessory hardware package Four KPS-25K servos carbon button wiper 5 pole motor 180-day limited warranty See RIO hobby dealer write brochure complete line Kraft products IWT5Y5TEMS 450 W California Avenue P 0 Box 1268 Vista California 92083 RAPPING FLYER 2 Sn"Boo 2 PARLOR COPTERS Spa. $395 ENDURANCE RUBBER MODELS THE EASY B3 IMS GliderS 12 Span 3 PARLOR PLANES IS Span $896 THE SLOWPOKE Spa Pa P p T THE TIME MACHINE PENNY 2 Yard Birds 12 118 OZ PLANE iUSpan c Plop SOBSI 18 13 MINIATURE SCALE AIRCRAFT KITS ea $095 OUTSTANDING DETAILS 3-VIEWS & HISTORY 045 Strip Wood Light Sheet Hardware & Prop U Heat Transfers Japanese Tissue U PLASTIC CYLINDERS ALCO HEATH 3 ALCO SPORT 1929 ZIPPY SPORT ARV WATERMAN RACER 1921 HEATH PARASOL 1928 AERONCA K 1937 Span 16 Length 9 INDOOR MODEL AIRPLANES Lew Gitlow 48 pgs 100 illust reprint PLAN. $395 PEANUT POWER Hannan 80 pgs 895 INDOOR BALSA PACK $095 P-NUT PACK $095 JAPANESE TISSUE 10 Ige 5 col roll $595 ENSER PAPER 21$250 MICROLITE $325 RUBBER LUBE $150 BALSA CEMENT $150 5 THRUST BEARINGS Mini Dual Dual 00 PIRELLI RUBBER 020 090 & 125 235 3 61 WINDER $395161 MARK 1 $1195 P-NUT CO-2 ENGINE $3495 CHARGER $095 P-NUT PROP PACK 4 props shafts ... $295 SCALE CYLINDERS 5 pack 318& 112 100 MS P-NUT PLANS ALL 510 sheets 500 ADD 10% POSTAGEMINIMUM POSTAGE $180 1983-4 CATALOG IS ILLUST PGS $150 V IW 395T Torrance CA 90510 RC Soaring/Pruss Continued page 43 would restrictions neither type Sailpianes presented discussed nor subject matter However ideas might have would first have cleared through Al subjects can also include electronic end sport airborne test equipment telemetering devices etc wouldnt restrictions model discussions either So inter ests Two-meter F3B Scale CrossCountry above just Sailplanes feed ideas Al Scidmore 5013 Dorsett Dr Madison WI 53711 USA FAI RC Soaring Team Selection Com mIttee tollowing list arranged accord ing AMA District identifies new F3B Team Selection Committee elected participants 1980 1982 programs will serve 1984 pro gram meantime committee will serve clearinghouse FAI rules pro posals ClAM next Decembers meeting District 1Dwight Holley 151 Chestnut Ridge Bethel CT 06801 District LI William Meleske 786 Grand Terrace Ave Baldwin NY 11510 District ILlTerry Luckenbach 5460 Colony Dr Bethlehem PA 18017 District IVHerk Stokley Chairman 1504 Horseshoe Circle Vir ginia Beach VA 23451 District VBlame Miller 4411 Tidewater Dr Orlando FL 32806 District VIJack Hiner 2213 Pren tice Creek Downers Grove IL 60515 Dis trict VIIWarren Tiahrt 7647 Twilight Ct Clarkston Ml 48016 District VILIDon Chancey 1600 Laurel Ln PIano TX 75006 District IXSkip Miller 655 Max well Ave Boulder CO 80302 District XLarry Jolly 5501 W Como Santa Ana CA 92703 District XIDavid W Johnson 3526 NE 90 Portland OR 97220 Proposals cleared com mittee must returned AMA Sep tember 1 order get proper review proposals must submitted com mittee time meet September dead line further details see page 110 July 1982 Model Atiarioi Individual mod elers must first send proposals AMA HQ no later July 15 AMA HQ directs proposals Team Selection Committee above dates havent convenient because team selection schedules past meet ClAM schedule its time frame have live within So circle dates calendar RC Glider net No its apparatus new landing event Its Amateur Radio Service network mentioned briefly end April column Alden Shipp WB9WAJ said II new check-ins first week came Colorado North Carolina net Amateur Radio fans operates Monday evenings 2330Z Frequency 7240 MHz andNet control Bob Summers W8BBY Enon OH Alden Shipp Quincy IL Sno-Fli February 20 1983 Couldnt s no snow did anyway According contest director Warren Tiahrt Greater Detroit Soaring Hiking So cietys 13th annual bash drew 61 entries Thats all-time high Over 13 years temperatures have ranged well below zero years 59 degreesalso alltime high 61 entries broke down 22 Unlimited class 37 Standard class plus two Junior-Senior entries commom twist contests among more clubs allow smaller birds compete larger category such Standard class Unlimited allowing Two-Meter Standard Unlimited classes years Sno-Fli four 19 Two-Meter ffiers muscled up Un limited class whilie 14 entered Standard class Know what happened John Hoover Sagitta 600 took first place Unlimited 1403 points Ray DeNoble outdid John point scored 1404 Gentle Lady win Standard class double whammy Two-Meter ships has contest director posing question time forget Unlimited class separate category Standard class isnt first time that has 148 Model Aviation Dl I OR CUSTOM II QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK-SIZES 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG KITs 21 Old Time Gas 12 HL Gliders 11 Contest Rubber Send SO for4 Satellite Kits 82183 Catalog3 Nastalgia Power PadSeas & LOTS OF GOOD STUFF m F 1 Model Supply I I 0 I $5995 c-Jig House Wing & Jig Whether consider yourself novice expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee Ajustojig CoR R 1 Box 673NoblesvIle Indiana 46060317 877-2223 asked Perhaps studies can made question can posed again Sailplane forum South Africa notes Ive included another shot Andy Keil Skybird F3B design destroyed rebuilt day before left Sacramento 1981 F3B World Championships Keil placed sixth contestwhich wasnt bad bird crudely painted aerosol paint can using motel parking lot spray booth Skybird however designed no less enthusiasm glass ships Dassel Spartakus camps Beaudry Pautz Louis Barendse com bined talents Andy produced model see photos Several clever ideas went Skybird design tnstead conventional removable canopy-type hatch provide accessability airborn equipment Skybird design incorporates removable nose extends back leading edge wing fillet see March 1982 Model Aviahon allows servos receiver battery ballast accessible since its mounted securely fuselage keel conforms profile removable nose section wing halves joined inside fuse lage unlike full-scale procedures much like Swiss Spartakus Such semblies close one-piece wing tegrity construction can get photo horizontal stabs shows neat way assemble two halves dont come apart No wire clips no set screws no kinked wires just use Du Bro ball link bury socket portion half stab during construction As column being finished word received Keil won South African Nationals second year row side note Keil refused remuner ation photos printed Instead said pass payment USA/F3B Team Fund said nice guys finish last ESE No 5000 honor goes James Merrill Werribee Victoria Australia Bob Summers LSF vice-president Foreign Coordinator says nearly 30 countries interest members LSF program 17 have Foreign Coordinators LSF members outside USA read column can contact Bob wish coordinate re spective countries Write Bob Summers LSF/3548 81 Fay Dr Enon OH 45323 USA Bob also asked point out foreign members have Coordinator should submit records receive new forms through respective coordinators especially true Canada coordinator Dave Henshaw 2865 Skyline Dr Windsor Ontario Canada N9E 3A6 New LSF Level V first 1983and 28th out 5000 membersis Dr Walt Good LSF/063 Port Richey FL youre newcomer sport its fair know Dr Good directly responsible sport enjoying About 30 years ago instrumental getting license-free radio use modeling 27 megacycles called before become overused what seemed like everything else also involved development Thermal Sniffler Congratulations Doe well done Theres still time support AERONCA C3 MASTER QUARTER SCALE FOR 60 TWO CYCLE OR 12 OPPOSED TWIN 4 CYCLE ENGINES 108 SPAN1280 SQ IN QUARTER SCALE PLAN SET $2100 VOGEL AVIATION BOX 54 BLDG6 RESEDA CALIF 91335 PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpass Wor/nsh- Pedormance July 1983 149 UIIDS WING STAB & FUSELAGE CHOICE OF MODELERS THE WORLD OVER Authentic Scale F-i 6 CORKNALS o. 0 cut Ph lIt Items included kit Wheels Hinges Landing gear control horns Special tools o fuel tank Noxe wheel faring Necessary linkage AII required fasteners Three complete decal sets Balsa plywood die-cut parts Scale flying stab assembly Shock-absorbing nose wheel assembly Hand-layed fiberglass fuse lpolyesterl Detailed canopy cockpit assembly Detailed fully illustrated assembly book Pre shaped control surfaces liniection molded polystrysnel Three-view detailed decal painting instructions lniection molded wings withe...__ aluminum extruded wing spars already molded ion fuselage Detailed fiberglass fuselage includes the in stalled items fan bulkhead/wing mounting spar Nyrods control rods thrust tube detailed exhaust cone molded armament F-16 Kit Retail value $27026 Factory price $22972 plus $1050 shipping Byro-Jets exclusive quick start capabilities makes engine starting fast easy safe No complicated belt stare procedures no hatches remove reassemble Simply attach starter extension Sullivan starter. insert assembly through tail pipe until contact made rotorand hit starter addition increasing power output unique custom Byro-Jet Pipe System provides necessary noise suppression means completely conceal tuned pipe within fuselage Available both side rear exhaust 60 engines detailed information send $200 postage handling ATIONS 750 sq eaoy-bo-hiy- 9Ya lbs ess opt tan... .cketsl Byron Originals PO Box 279 Ida Grove Iowa 51445 Ph 712-364-3165 USA/E3B team Patches $6 lapel pins $5 vinyl decals $3 Send R C Odle 815 Mellow Ln Simi Valley CA 93065 Make checks payable F3B Soaring TeamGood lift passing away Lee Renaud has brought man Y queries what can done memory family close friends have decided anyone wishing contribute 10 memory may send con tribution AMA Building Fund/Lee Re naud Memorial monies will set aside tribute hin AMA library Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ScalelWischers CnntinuAd naae 45 necessary Heavy-wire bending can problem Most models use music wire some point structure landing gears example kit builder finds parts ready-formed box sugges tion use wire bender Breiten Coil Bender comes two sizes 5A2 3/~ diameter wire K&S Engineering makes Mighty Wire Bender I/v through /4-in music wire cutting wire use Dremel Moto Tool abrasive cutting wheel Wear eye protection using tool Cutting bulkheads ribs sheet balsa can simplified tracing parts drafting vellum semi transparent paper Lay vellum over drawing trace part outline using straightedge available draftsmans curves assure accurate copies Tack-glue vellum sheet balsa cut through paper balsa Double-coated tape sticky both sides convenience Vellum can purchased rolls sheets artist drafting supply stores straight wing ribs alike make rib template aluminum thin plywood use cutting guide advantages scratch-building opportunity select materials best suited purpose Strength weight pans controlled builder Select straight hard balsa wing spars use spruce ensure warp-free construction Wing ribs can made lighter balsa make practice weigh sheet balsa use sheets near equal weight ribs avoid situation wing becomes heavier Heavy sheets hard balsa should used stress points absorbing loads such firewall wing saddle landing gear attachment Lightest balsa goes tail surfaces wing ribs sheeted surfaces temptatioin substitute plywood balsa keep mind average weight ratio about 4 other words Av ply can substituted /4-in medium-weight balsa usually considerable gain strength /4-in balsa can cemented along its edges directly adjacent parts un-in ply requires gussets along edges secure fastening benefits scratch-building 150 Model Aviation No other ducted fan model comes close Opt Tanks & Retail value $3706 Factory price $3150 includes shipping Powered proven Bijiet ducted fan system
Edition: Model Aviation - 1983/07
Page Numbers: 42, 43, 148, 149, 150
Radio Control SOARING Dan Pruss 42 Model Aviation USA RC Soaring forum April column mention made Soar Tech set papers available through Herk Stok ley Mentioned also Switzerlands anAutomatic line-retrievers becoming standard equipment contest work quiet efficient compared dirt bikes motorcycles drivers fees etc Photo Dave Corven dress Detroit Sno-Fli sometimes open shirt sun glasses no glovesbut downfilled jacket just case CD controls preregistrations Ken Bates shows off originaldesign Standard class 1 00-in E-203 craft Dave Corven photo nual International RC Soaring Flight Forum 1SF Both contributions soaring have stirred imagination quite few folks US As suggested end column surely room similar forum column being prepared Al Scidmore Madison WI already formu e Michigans Joe Feather launches 2-Meter Icarus Pic Dave Corven Ray Hayes Indiana resident launches Bird ot Time Meet used two winches its own automatic towline retrieval system gave nearly 250 launches 6 hours Dave Corven photograph lating such idea Dates arent firm yet plans being made hold forum first part November 1983 What will program depends what can contribute forum being planned modelers modelers will base exchanging ideas course will excellent opportunity just gathering information Some ideas Al discussed hoped modelers would present include mold-making construction tech niques foam cutting design theories airfoil discussions would good op portunity thick airfoil advocates debate thin airfoil scholars Continued page 148 July 1983 43 5outh Africas winningest sailplane Andy Keil Skybird has won consecutive South African Nats last world champswill York England year Below clever way joining stabilizer halves Du-Bro ball link end joiner-rod snaps ball socket buried other stab Below left see wing blade joiner Andys craft Full-scale technique gives max strength good alignment Photos Keil iwr Ir-LIflD 5CHANNEL SYSTEM K-Line imported radio control systems Kraft manufactured tested Krafts specifications provide inexpensive radios same solid record reliability made Kraft plant Vista California THE KP5K 5-CHANNEL R/O SYSTEM FEATURES Smooth precise feel gimbals ratcheted trims Dual rate switches Built-in telescoping antenna Impact resistant Kraft gold color case Double-tuned high sensitivity receiver plug-in crystal Full NiCads dual LED charger complete accessory hardware package Four KPS-25K servos carbon button wiper 5 pole motor 180-day limited warranty See RIO hobby dealer write brochure complete line Kraft products IWT5Y5TEMS 450 W California Avenue P 0 Box 1268 Vista California 92083 RAPPING FLYER 2 Sn"Boo 2 PARLOR COPTERS Spa. $395 ENDURANCE RUBBER MODELS THE EASY B3 IMS GliderS 12 Span 3 PARLOR PLANES IS Span $896 THE SLOWPOKE Spa Pa P p T THE TIME MACHINE PENNY 2 Yard Birds 12 118 OZ PLANE iUSpan c Plop SOBSI 18 13 MINIATURE SCALE AIRCRAFT KITS ea $095 OUTSTANDING DETAILS 3-VIEWS & HISTORY 045 Strip Wood Light Sheet Hardware & Prop U Heat Transfers Japanese Tissue U PLASTIC CYLINDERS ALCO HEATH 3 ALCO SPORT 1929 ZIPPY SPORT ARV WATERMAN RACER 1921 HEATH PARASOL 1928 AERONCA K 1937 Span 16 Length 9 INDOOR MODEL AIRPLANES Lew Gitlow 48 pgs 100 illust reprint PLAN. $395 PEANUT POWER Hannan 80 pgs 895 INDOOR BALSA PACK $095 P-NUT PACK $095 JAPANESE TISSUE 10 Ige 5 col roll $595 ENSER PAPER 21$250 MICROLITE $325 RUBBER LUBE $150 BALSA CEMENT $150 5 THRUST BEARINGS Mini Dual Dual 00 PIRELLI RUBBER 020 090 & 125 235 3 61 WINDER $395161 MARK 1 $1195 P-NUT CO-2 ENGINE $3495 CHARGER $095 P-NUT PROP PACK 4 props shafts ... $295 SCALE CYLINDERS 5 pack 318& 112 100 MS P-NUT PLANS ALL 510 sheets 500 ADD 10% POSTAGEMINIMUM POSTAGE $180 1983-4 CATALOG IS ILLUST PGS $150 V IW 395T Torrance CA 90510 RC Soaring/Pruss Continued page 43 would restrictions neither type Sailpianes presented discussed nor subject matter However ideas might have would first have cleared through Al subjects can also include electronic end sport airborne test equipment telemetering devices etc wouldnt restrictions model discussions either So inter ests Two-meter F3B Scale CrossCountry above just Sailplanes feed ideas Al Scidmore 5013 Dorsett Dr Madison WI 53711 USA FAI RC Soaring Team Selection Com mIttee tollowing list arranged accord ing AMA District identifies new F3B Team Selection Committee elected participants 1980 1982 programs will serve 1984 pro gram meantime committee will serve clearinghouse FAI rules pro posals ClAM next Decembers meeting District 1Dwight Holley 151 Chestnut Ridge Bethel CT 06801 District LI William Meleske 786 Grand Terrace Ave Baldwin NY 11510 District ILlTerry Luckenbach 5460 Colony Dr Bethlehem PA 18017 District IVHerk Stokley Chairman 1504 Horseshoe Circle Vir ginia Beach VA 23451 District VBlame Miller 4411 Tidewater Dr Orlando FL 32806 District VIJack Hiner 2213 Pren tice Creek Downers Grove IL 60515 Dis trict VIIWarren Tiahrt 7647 Twilight Ct Clarkston Ml 48016 District VILIDon Chancey 1600 Laurel Ln PIano TX 75006 District IXSkip Miller 655 Max well Ave Boulder CO 80302 District XLarry Jolly 5501 W Como Santa Ana CA 92703 District XIDavid W Johnson 3526 NE 90 Portland OR 97220 Proposals cleared com mittee must returned AMA Sep tember 1 order get proper review proposals must submitted com mittee time meet September dead line further details see page 110 July 1982 Model Atiarioi Individual mod elers must first send proposals AMA HQ no later July 15 AMA HQ directs proposals Team Selection Committee above dates havent convenient because team selection schedules past meet ClAM schedule its time frame have live within So circle dates calendar RC Glider net No its apparatus new landing event Its Amateur Radio Service network mentioned briefly end April column Alden Shipp WB9WAJ said II new check-ins first week came Colorado North Carolina net Amateur Radio fans operates Monday evenings 2330Z Frequency 7240 MHz andNet control Bob Summers W8BBY Enon OH Alden Shipp Quincy IL Sno-Fli February 20 1983 Couldnt s no snow did anyway According contest director Warren Tiahrt Greater Detroit Soaring Hiking So cietys 13th annual bash drew 61 entries Thats all-time high Over 13 years temperatures have ranged well below zero years 59 degreesalso alltime high 61 entries broke down 22 Unlimited class 37 Standard class plus two Junior-Senior entries commom twist contests among more clubs allow smaller birds compete larger category such Standard class Unlimited allowing Two-Meter Standard Unlimited classes years Sno-Fli four 19 Two-Meter ffiers muscled up Un limited class whilie 14 entered Standard class Know what happened John Hoover Sagitta 600 took first place Unlimited 1403 points Ray DeNoble outdid John point scored 1404 Gentle Lady win Standard class double whammy Two-Meter ships has contest director posing question time forget Unlimited class separate category Standard class isnt first time that has 148 Model Aviation Dl I OR CUSTOM II QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK-SIZES 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG KITs 21 Old Time Gas 12 HL Gliders 11 Contest Rubber Send SO for4 Satellite Kits 82183 Catalog3 Nastalgia Power PadSeas & LOTS OF GOOD STUFF m F 1 Model Supply I I 0 I $5995 c-Jig House Wing & Jig Whether consider yourself novice expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee Ajustojig CoR R 1 Box 673NoblesvIle Indiana 46060317 877-2223 asked Perhaps studies can made question can posed again Sailplane forum South Africa notes Ive included another shot Andy Keil Skybird F3B design destroyed rebuilt day before left Sacramento 1981 F3B World Championships Keil placed sixth contestwhich wasnt bad bird crudely painted aerosol paint can using motel parking lot spray booth Skybird however designed no less enthusiasm glass ships Dassel Spartakus camps Beaudry Pautz Louis Barendse com bined talents Andy produced model see photos Several clever ideas went Skybird design tnstead conventional removable canopy-type hatch provide accessability airborn equipment Skybird design incorporates removable nose extends back leading edge wing fillet see March 1982 Model Aviahon allows servos receiver battery ballast accessible since its mounted securely fuselage keel conforms profile removable nose section wing halves joined inside fuse lage unlike full-scale procedures much like Swiss Spartakus Such semblies close one-piece wing tegrity construction can get photo horizontal stabs shows neat way assemble two halves dont come apart No wire clips no set screws no kinked wires just use Du Bro ball link bury socket portion half stab during construction As column being finished word received Keil won South African Nationals second year row side note Keil refused remuner ation photos printed Instead said pass payment USA/F3B Team Fund said nice guys finish last ESE No 5000 honor goes James Merrill Werribee Victoria Australia Bob Summers LSF vice-president Foreign Coordinator says nearly 30 countries interest members LSF program 17 have Foreign Coordinators LSF members outside USA read column can contact Bob wish coordinate re spective countries Write Bob Summers LSF/3548 81 Fay Dr Enon OH 45323 USA Bob also asked point out foreign members have Coordinator should submit records receive new forms through respective coordinators especially true Canada coordinator Dave Henshaw 2865 Skyline Dr Windsor Ontario Canada N9E 3A6 New LSF Level V first 1983and 28th out 5000 membersis Dr Walt Good LSF/063 Port Richey FL youre newcomer sport its fair know Dr Good directly responsible sport enjoying About 30 years ago instrumental getting license-free radio use modeling 27 megacycles called before become overused what seemed like everything else also involved development Thermal Sniffler Congratulations Doe well done Theres still time support AERONCA C3 MASTER QUARTER SCALE FOR 60 TWO CYCLE OR 12 OPPOSED TWIN 4 CYCLE ENGINES 108 SPAN1280 SQ IN QUARTER SCALE PLAN SET $2100 VOGEL AVIATION BOX 54 BLDG6 RESEDA CALIF 91335 PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpass Wor/nsh- Pedormance July 1983 149 UIIDS WING STAB & FUSELAGE CHOICE OF MODELERS THE WORLD OVER Authentic Scale F-i 6 CORKNALS o. 0 cut Ph lIt Items included kit Wheels Hinges Landing gear control horns Special tools o fuel tank Noxe wheel faring Necessary linkage AII required fasteners Three complete decal sets Balsa plywood die-cut parts Scale flying stab assembly Shock-absorbing nose wheel assembly Hand-layed fiberglass fuse lpolyesterl Detailed canopy cockpit assembly Detailed fully illustrated assembly book Pre shaped control surfaces liniection molded polystrysnel Three-view detailed decal painting instructions lniection molded wings withe...__ aluminum extruded wing spars already molded ion fuselage Detailed fiberglass fuselage includes the in stalled items fan bulkhead/wing mounting spar Nyrods control rods thrust tube detailed exhaust cone molded armament F-16 Kit Retail value $27026 Factory price $22972 plus $1050 shipping Byro-Jets exclusive quick start capabilities makes engine starting fast easy safe No complicated belt stare procedures no hatches remove reassemble Simply attach starter extension Sullivan starter. insert assembly through tail pipe until contact made rotorand hit starter addition increasing power output unique custom Byro-Jet Pipe System provides necessary noise suppression means completely conceal tuned pipe within fuselage Available both side rear exhaust 60 engines detailed information send $200 postage handling ATIONS 750 sq eaoy-bo-hiy- 9Ya lbs ess opt tan... .cketsl Byron Originals PO Box 279 Ida Grove Iowa 51445 Ph 712-364-3165 USA/E3B team Patches $6 lapel pins $5 vinyl decals $3 Send R C Odle 815 Mellow Ln Simi Valley CA 93065 Make checks payable F3B Soaring TeamGood lift passing away Lee Renaud has brought man Y queries what can done memory family close friends have decided anyone wishing contribute 10 memory may send con tribution AMA Building Fund/Lee Re naud Memorial monies will set aside tribute hin AMA library Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ScalelWischers CnntinuAd naae 45 necessary Heavy-wire bending can problem Most models use music wire some point structure landing gears example kit builder finds parts ready-formed box sugges tion use wire bender Breiten Coil Bender comes two sizes 5A2 3/~ diameter wire K&S Engineering makes Mighty Wire Bender I/v through /4-in music wire cutting wire use Dremel Moto Tool abrasive cutting wheel Wear eye protection using tool Cutting bulkheads ribs sheet balsa can simplified tracing parts drafting vellum semi transparent paper Lay vellum over drawing trace part outline using straightedge available draftsmans curves assure accurate copies Tack-glue vellum sheet balsa cut through paper balsa Double-coated tape sticky both sides convenience Vellum can purchased rolls sheets artist drafting supply stores straight wing ribs alike make rib template aluminum thin plywood use cutting guide advantages scratch-building opportunity select materials best suited purpose Strength weight pans controlled builder Select straight hard balsa wing spars use spruce ensure warp-free construction Wing ribs can made lighter balsa make practice weigh sheet balsa use sheets near equal weight ribs avoid situation wing becomes heavier Heavy sheets hard balsa should used stress points absorbing loads such firewall wing saddle landing gear attachment Lightest balsa goes tail surfaces wing ribs sheeted surfaces temptatioin substitute plywood balsa keep mind average weight ratio about 4 other words Av ply can substituted /4-in medium-weight balsa usually considerable gain strength /4-in balsa can cemented along its edges directly adjacent parts un-in ply requires gussets along edges secure fastening benefits scratch-building 150 Model Aviation No other ducted fan model comes close Opt Tanks & Retail value $3706 Factory price $3150 includes shipping Powered proven Bijiet ducted fan system
Edition: Model Aviation - 1983/07
Page Numbers: 42, 43, 148, 149, 150
Radio Control SOARING Dan Pruss 42 Model Aviation USA RC Soaring forum April column mention made Soar Tech set papers available through Herk Stok ley Mentioned also Switzerlands anAutomatic line-retrievers becoming standard equipment contest work quiet efficient compared dirt bikes motorcycles drivers fees etc Photo Dave Corven dress Detroit Sno-Fli sometimes open shirt sun glasses no glovesbut downfilled jacket just case CD controls preregistrations Ken Bates shows off originaldesign Standard class 1 00-in E-203 craft Dave Corven photo nual International RC Soaring Flight Forum 1SF Both contributions soaring have stirred imagination quite few folks US As suggested end column surely room similar forum column being prepared Al Scidmore Madison WI already formu e Michigans Joe Feather launches 2-Meter Icarus Pic Dave Corven Ray Hayes Indiana resident launches Bird ot Time Meet used two winches its own automatic towline retrieval system gave nearly 250 launches 6 hours Dave Corven photograph lating such idea Dates arent firm yet plans being made hold forum first part November 1983 What will program depends what can contribute forum being planned modelers modelers will base exchanging ideas course will excellent opportunity just gathering information Some ideas Al discussed hoped modelers would present include mold-making construction tech niques foam cutting design theories airfoil discussions would good op portunity thick airfoil advocates debate thin airfoil scholars Continued page 148 July 1983 43 5outh Africas winningest sailplane Andy Keil Skybird has won consecutive South African Nats last world champswill York England year Below clever way joining stabilizer halves Du-Bro ball link end joiner-rod snaps ball socket buried other stab Below left see wing blade joiner Andys craft Full-scale technique gives max strength good alignment Photos Keil iwr Ir-LIflD 5CHANNEL SYSTEM K-Line imported radio control systems Kraft manufactured tested Krafts specifications provide inexpensive radios same solid record reliability made Kraft plant Vista California THE KP5K 5-CHANNEL R/O SYSTEM FEATURES Smooth precise feel gimbals ratcheted trims Dual rate switches Built-in telescoping antenna Impact resistant Kraft gold color case Double-tuned high sensitivity receiver plug-in crystal Full NiCads dual LED charger complete accessory hardware package Four KPS-25K servos carbon button wiper 5 pole motor 180-day limited warranty See RIO hobby dealer write brochure complete line Kraft products IWT5Y5TEMS 450 W California Avenue P 0 Box 1268 Vista California 92083 RAPPING FLYER 2 Sn"Boo 2 PARLOR COPTERS Spa. $395 ENDURANCE RUBBER MODELS THE EASY B3 IMS GliderS 12 Span 3 PARLOR PLANES IS Span $896 THE SLOWPOKE Spa Pa P p T THE TIME MACHINE PENNY 2 Yard Birds 12 118 OZ PLANE iUSpan c Plop SOBSI 18 13 MINIATURE SCALE AIRCRAFT KITS ea $095 OUTSTANDING DETAILS 3-VIEWS & HISTORY 045 Strip Wood Light Sheet Hardware & Prop U Heat Transfers Japanese Tissue U PLASTIC CYLINDERS ALCO HEATH 3 ALCO SPORT 1929 ZIPPY SPORT ARV WATERMAN RACER 1921 HEATH PARASOL 1928 AERONCA K 1937 Span 16 Length 9 INDOOR MODEL AIRPLANES Lew Gitlow 48 pgs 100 illust reprint PLAN. $395 PEANUT POWER Hannan 80 pgs 895 INDOOR BALSA PACK $095 P-NUT PACK $095 JAPANESE TISSUE 10 Ige 5 col roll $595 ENSER PAPER 21$250 MICROLITE $325 RUBBER LUBE $150 BALSA CEMENT $150 5 THRUST BEARINGS Mini Dual Dual 00 PIRELLI RUBBER 020 090 & 125 235 3 61 WINDER $395161 MARK 1 $1195 P-NUT CO-2 ENGINE $3495 CHARGER $095 P-NUT PROP PACK 4 props shafts ... $295 SCALE CYLINDERS 5 pack 318& 112 100 MS P-NUT PLANS ALL 510 sheets 500 ADD 10% POSTAGEMINIMUM POSTAGE $180 1983-4 CATALOG IS ILLUST PGS $150 V IW 395T Torrance CA 90510 RC Soaring/Pruss Continued page 43 would restrictions neither type Sailpianes presented discussed nor subject matter However ideas might have would first have cleared through Al subjects can also include electronic end sport airborne test equipment telemetering devices etc wouldnt restrictions model discussions either So inter ests Two-meter F3B Scale CrossCountry above just Sailplanes feed ideas Al Scidmore 5013 Dorsett Dr Madison WI 53711 USA FAI RC Soaring Team Selection Com mIttee tollowing list arranged accord ing AMA District identifies new F3B Team Selection Committee elected participants 1980 1982 programs will serve 1984 pro gram meantime committee will serve clearinghouse FAI rules pro posals ClAM next Decembers meeting District 1Dwight Holley 151 Chestnut Ridge Bethel CT 06801 District LI William Meleske 786 Grand Terrace Ave Baldwin NY 11510 District ILlTerry Luckenbach 5460 Colony Dr Bethlehem PA 18017 District IVHerk Stokley Chairman 1504 Horseshoe Circle Vir ginia Beach VA 23451 District VBlame Miller 4411 Tidewater Dr Orlando FL 32806 District VIJack Hiner 2213 Pren tice Creek Downers Grove IL 60515 Dis trict VIIWarren Tiahrt 7647 Twilight Ct Clarkston Ml 48016 District VILIDon Chancey 1600 Laurel Ln PIano TX 75006 District IXSkip Miller 655 Max well Ave Boulder CO 80302 District XLarry Jolly 5501 W Como Santa Ana CA 92703 District XIDavid W Johnson 3526 NE 90 Portland OR 97220 Proposals cleared com mittee must returned AMA Sep tember 1 order get proper review proposals must submitted com mittee time meet September dead line further details see page 110 July 1982 Model Atiarioi Individual mod elers must first send proposals AMA HQ no later July 15 AMA HQ directs proposals Team Selection Committee above dates havent convenient because team selection schedules past meet ClAM schedule its time frame have live within So circle dates calendar RC Glider net No its apparatus new landing event Its Amateur Radio Service network mentioned briefly end April column Alden Shipp WB9WAJ said II new check-ins first week came Colorado North Carolina net Amateur Radio fans operates Monday evenings 2330Z Frequency 7240 MHz andNet control Bob Summers W8BBY Enon OH Alden Shipp Quincy IL Sno-Fli February 20 1983 Couldnt s no snow did anyway According contest director Warren Tiahrt Greater Detroit Soaring Hiking So cietys 13th annual bash drew 61 entries Thats all-time high Over 13 years temperatures have ranged well below zero years 59 degreesalso alltime high 61 entries broke down 22 Unlimited class 37 Standard class plus two Junior-Senior entries commom twist contests among more clubs allow smaller birds compete larger category such Standard class Unlimited allowing Two-Meter Standard Unlimited classes years Sno-Fli four 19 Two-Meter ffiers muscled up Un limited class whilie 14 entered Standard class Know what happened John Hoover Sagitta 600 took first place Unlimited 1403 points Ray DeNoble outdid John point scored 1404 Gentle Lady win Standard class double whammy Two-Meter ships has contest director posing question time forget Unlimited class separate category Standard class isnt first time that has 148 Model Aviation Dl I OR CUSTOM II QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK-SIZES 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG KITs 21 Old Time Gas 12 HL Gliders 11 Contest Rubber Send SO for4 Satellite Kits 82183 Catalog3 Nastalgia Power PadSeas & LOTS OF GOOD STUFF m F 1 Model Supply I I 0 I $5995 c-Jig House Wing & Jig Whether consider yourself novice expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee Ajustojig CoR R 1 Box 673NoblesvIle Indiana 46060317 877-2223 asked Perhaps studies can made question can posed again Sailplane forum South Africa notes Ive included another shot Andy Keil Skybird F3B design destroyed rebuilt day before left Sacramento 1981 F3B World Championships Keil placed sixth contestwhich wasnt bad bird crudely painted aerosol paint can using motel parking lot spray booth Skybird however designed no less enthusiasm glass ships Dassel Spartakus camps Beaudry Pautz Louis Barendse com bined talents Andy produced model see photos Several clever ideas went Skybird design tnstead conventional removable canopy-type hatch provide accessability airborn equipment Skybird design incorporates removable nose extends back leading edge wing fillet see March 1982 Model Aviahon allows servos receiver battery ballast accessible since its mounted securely fuselage keel conforms profile removable nose section wing halves joined inside fuse lage unlike full-scale procedures much like Swiss Spartakus Such semblies close one-piece wing tegrity construction can get photo horizontal stabs shows neat way assemble two halves dont come apart No wire clips no set screws no kinked wires just use Du Bro ball link bury socket portion half stab during construction As column being finished word received Keil won South African Nationals second year row side note Keil refused remuner ation photos printed Instead said pass payment USA/F3B Team Fund said nice guys finish last ESE No 5000 honor goes James Merrill Werribee Victoria Australia Bob Summers LSF vice-president Foreign Coordinator says nearly 30 countries interest members LSF program 17 have Foreign Coordinators LSF members outside USA read column can contact Bob wish coordinate re spective countries Write Bob Summers LSF/3548 81 Fay Dr Enon OH 45323 USA Bob also asked point out foreign members have Coordinator should submit records receive new forms through respective coordinators especially true Canada coordinator Dave Henshaw 2865 Skyline Dr Windsor Ontario Canada N9E 3A6 New LSF Level V first 1983and 28th out 5000 membersis Dr Walt Good LSF/063 Port Richey FL youre newcomer sport its fair know Dr Good directly responsible sport enjoying About 30 years ago instrumental getting license-free radio use modeling 27 megacycles called before become overused what seemed like everything else also involved development Thermal Sniffler Congratulations Doe well done Theres still time support AERONCA C3 MASTER QUARTER SCALE FOR 60 TWO CYCLE OR 12 OPPOSED TWIN 4 CYCLE ENGINES 108 SPAN1280 SQ IN QUARTER SCALE PLAN SET $2100 VOGEL AVIATION BOX 54 BLDG6 RESEDA CALIF 91335 PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpass Wor/nsh- Pedormance July 1983 149 UIIDS WING STAB & FUSELAGE CHOICE OF MODELERS THE WORLD OVER Authentic Scale F-i 6 CORKNALS o. 0 cut Ph lIt Items included kit Wheels Hinges Landing gear control horns Special tools o fuel tank Noxe wheel faring Necessary linkage AII required fasteners Three complete decal sets Balsa plywood die-cut parts Scale flying stab assembly Shock-absorbing nose wheel assembly Hand-layed fiberglass fuse lpolyesterl Detailed canopy cockpit assembly Detailed fully illustrated assembly book Pre shaped control surfaces liniection molded polystrysnel Three-view detailed decal painting instructions lniection molded wings withe...__ aluminum extruded wing spars already molded ion fuselage Detailed fiberglass fuselage includes the in stalled items fan bulkhead/wing mounting spar Nyrods control rods thrust tube detailed exhaust cone molded armament F-16 Kit Retail value $27026 Factory price $22972 plus $1050 shipping Byro-Jets exclusive quick start capabilities makes engine starting fast easy safe No complicated belt stare procedures no hatches remove reassemble Simply attach starter extension Sullivan starter. insert assembly through tail pipe until contact made rotorand hit starter addition increasing power output unique custom Byro-Jet Pipe System provides necessary noise suppression means completely conceal tuned pipe within fuselage Available both side rear exhaust 60 engines detailed information send $200 postage handling ATIONS 750 sq eaoy-bo-hiy- 9Ya lbs ess opt tan... .cketsl Byron Originals PO Box 279 Ida Grove Iowa 51445 Ph 712-364-3165 USA/E3B team Patches $6 lapel pins $5 vinyl decals $3 Send R C Odle 815 Mellow Ln Simi Valley CA 93065 Make checks payable F3B Soaring TeamGood lift passing away Lee Renaud has brought man Y queries what can done memory family close friends have decided anyone wishing contribute 10 memory may send con tribution AMA Building Fund/Lee Re naud Memorial monies will set aside tribute hin AMA library Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ScalelWischers CnntinuAd naae 45 necessary Heavy-wire bending can problem Most models use music wire some point structure landing gears example kit builder finds parts ready-formed box sugges tion use wire bender Breiten Coil Bender comes two sizes 5A2 3/~ diameter wire K&S Engineering makes Mighty Wire Bender I/v through /4-in music wire cutting wire use Dremel Moto Tool abrasive cutting wheel Wear eye protection using tool Cutting bulkheads ribs sheet balsa can simplified tracing parts drafting vellum semi transparent paper Lay vellum over drawing trace part outline using straightedge available draftsmans curves assure accurate copies Tack-glue vellum sheet balsa cut through paper balsa Double-coated tape sticky both sides convenience Vellum can purchased rolls sheets artist drafting supply stores straight wing ribs alike make rib template aluminum thin plywood use cutting guide advantages scratch-building opportunity select materials best suited purpose Strength weight pans controlled builder Select straight hard balsa wing spars use spruce ensure warp-free construction Wing ribs can made lighter balsa make practice weigh sheet balsa use sheets near equal weight ribs avoid situation wing becomes heavier Heavy sheets hard balsa should used stress points absorbing loads such firewall wing saddle landing gear attachment Lightest balsa goes tail surfaces wing ribs sheeted surfaces temptatioin substitute plywood balsa keep mind average weight ratio about 4 other words Av ply can substituted /4-in medium-weight balsa usually considerable gain strength /4-in balsa can cemented along its edges directly adjacent parts un-in ply requires gussets along edges secure fastening benefits scratch-building 150 Model Aviation No other ducted fan model comes close Opt Tanks & Retail value $3706 Factory price $3150 includes shipping Powered proven Bijiet ducted fan system
Edition: Model Aviation - 1983/07
Page Numbers: 42, 43, 148, 149, 150
Radio Control SOARING Dan Pruss 42 Model Aviation USA RC Soaring forum April column mention made Soar Tech set papers available through Herk Stok ley Mentioned also Switzerlands anAutomatic line-retrievers becoming standard equipment contest work quiet efficient compared dirt bikes motorcycles drivers fees etc Photo Dave Corven dress Detroit Sno-Fli sometimes open shirt sun glasses no glovesbut downfilled jacket just case CD controls preregistrations Ken Bates shows off originaldesign Standard class 1 00-in E-203 craft Dave Corven photo nual International RC Soaring Flight Forum 1SF Both contributions soaring have stirred imagination quite few folks US As suggested end column surely room similar forum column being prepared Al Scidmore Madison WI already formu e Michigans Joe Feather launches 2-Meter Icarus Pic Dave Corven Ray Hayes Indiana resident launches Bird ot Time Meet used two winches its own automatic towline retrieval system gave nearly 250 launches 6 hours Dave Corven photograph lating such idea Dates arent firm yet plans being made hold forum first part November 1983 What will program depends what can contribute forum being planned modelers modelers will base exchanging ideas course will excellent opportunity just gathering information Some ideas Al discussed hoped modelers would present include mold-making construction tech niques foam cutting design theories airfoil discussions would good op portunity thick airfoil advocates debate thin airfoil scholars Continued page 148 July 1983 43 5outh Africas winningest sailplane Andy Keil Skybird has won consecutive South African Nats last world champswill York England year Below clever way joining stabilizer halves Du-Bro ball link end joiner-rod snaps ball socket buried other stab Below left see wing blade joiner Andys craft Full-scale technique gives max strength good alignment Photos Keil iwr Ir-LIflD 5CHANNEL SYSTEM K-Line imported radio control systems Kraft manufactured tested Krafts specifications provide inexpensive radios same solid record reliability made Kraft plant Vista California THE KP5K 5-CHANNEL R/O SYSTEM FEATURES Smooth precise feel gimbals ratcheted trims Dual rate switches Built-in telescoping antenna Impact resistant Kraft gold color case Double-tuned high sensitivity receiver plug-in crystal Full NiCads dual LED charger complete accessory hardware package Four KPS-25K servos carbon button wiper 5 pole motor 180-day limited warranty See RIO hobby dealer write brochure complete line Kraft products IWT5Y5TEMS 450 W California Avenue P 0 Box 1268 Vista California 92083 RAPPING FLYER 2 Sn"Boo 2 PARLOR COPTERS Spa. $395 ENDURANCE RUBBER MODELS THE EASY B3 IMS GliderS 12 Span 3 PARLOR PLANES IS Span $896 THE SLOWPOKE Spa Pa P p T THE TIME MACHINE PENNY 2 Yard Birds 12 118 OZ PLANE iUSpan c Plop SOBSI 18 13 MINIATURE SCALE AIRCRAFT KITS ea $095 OUTSTANDING DETAILS 3-VIEWS & HISTORY 045 Strip Wood Light Sheet Hardware & Prop U Heat Transfers Japanese Tissue U PLASTIC CYLINDERS ALCO HEATH 3 ALCO SPORT 1929 ZIPPY SPORT ARV WATERMAN RACER 1921 HEATH PARASOL 1928 AERONCA K 1937 Span 16 Length 9 INDOOR MODEL AIRPLANES Lew Gitlow 48 pgs 100 illust reprint PLAN. $395 PEANUT POWER Hannan 80 pgs 895 INDOOR BALSA PACK $095 P-NUT PACK $095 JAPANESE TISSUE 10 Ige 5 col roll $595 ENSER PAPER 21$250 MICROLITE $325 RUBBER LUBE $150 BALSA CEMENT $150 5 THRUST BEARINGS Mini Dual Dual 00 PIRELLI RUBBER 020 090 & 125 235 3 61 WINDER $395161 MARK 1 $1195 P-NUT CO-2 ENGINE $3495 CHARGER $095 P-NUT PROP PACK 4 props shafts ... $295 SCALE CYLINDERS 5 pack 318& 112 100 MS P-NUT PLANS ALL 510 sheets 500 ADD 10% POSTAGEMINIMUM POSTAGE $180 1983-4 CATALOG IS ILLUST PGS $150 V IW 395T Torrance CA 90510 RC Soaring/Pruss Continued page 43 would restrictions neither type Sailpianes presented discussed nor subject matter However ideas might have would first have cleared through Al subjects can also include electronic end sport airborne test equipment telemetering devices etc wouldnt restrictions model discussions either So inter ests Two-meter F3B Scale CrossCountry above just Sailplanes feed ideas Al Scidmore 5013 Dorsett Dr Madison WI 53711 USA FAI RC Soaring Team Selection Com mIttee tollowing list arranged accord ing AMA District identifies new F3B Team Selection Committee elected participants 1980 1982 programs will serve 1984 pro gram meantime committee will serve clearinghouse FAI rules pro posals ClAM next Decembers meeting District 1Dwight Holley 151 Chestnut Ridge Bethel CT 06801 District LI William Meleske 786 Grand Terrace Ave Baldwin NY 11510 District ILlTerry Luckenbach 5460 Colony Dr Bethlehem PA 18017 District IVHerk Stokley Chairman 1504 Horseshoe Circle Vir ginia Beach VA 23451 District VBlame Miller 4411 Tidewater Dr Orlando FL 32806 District VIJack Hiner 2213 Pren tice Creek Downers Grove IL 60515 Dis trict VIIWarren Tiahrt 7647 Twilight Ct Clarkston Ml 48016 District VILIDon Chancey 1600 Laurel Ln PIano TX 75006 District IXSkip Miller 655 Max well Ave Boulder CO 80302 District XLarry Jolly 5501 W Como Santa Ana CA 92703 District XIDavid W Johnson 3526 NE 90 Portland OR 97220 Proposals cleared com mittee must returned AMA Sep tember 1 order get proper review proposals must submitted com mittee time meet September dead line further details see page 110 July 1982 Model Atiarioi Individual mod elers must first send proposals AMA HQ no later July 15 AMA HQ directs proposals Team Selection Committee above dates havent convenient because team selection schedules past meet ClAM schedule its time frame have live within So circle dates calendar RC Glider net No its apparatus new landing event Its Amateur Radio Service network mentioned briefly end April column Alden Shipp WB9WAJ said II new check-ins first week came Colorado North Carolina net Amateur Radio fans operates Monday evenings 2330Z Frequency 7240 MHz andNet control Bob Summers W8BBY Enon OH Alden Shipp Quincy IL Sno-Fli February 20 1983 Couldnt s no snow did anyway According contest director Warren Tiahrt Greater Detroit Soaring Hiking So cietys 13th annual bash drew 61 entries Thats all-time high Over 13 years temperatures have ranged well below zero years 59 degreesalso alltime high 61 entries broke down 22 Unlimited class 37 Standard class plus two Junior-Senior entries commom twist contests among more clubs allow smaller birds compete larger category such Standard class Unlimited allowing Two-Meter Standard Unlimited classes years Sno-Fli four 19 Two-Meter ffiers muscled up Un limited class whilie 14 entered Standard class Know what happened John Hoover Sagitta 600 took first place Unlimited 1403 points Ray DeNoble outdid John point scored 1404 Gentle Lady win Standard class double whammy Two-Meter ships has contest director posing question time forget Unlimited class separate category Standard class isnt first time that has 148 Model Aviation Dl I OR CUSTOM II QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK-SIZES 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG KITs 21 Old Time Gas 12 HL Gliders 11 Contest Rubber Send SO for4 Satellite Kits 82183 Catalog3 Nastalgia Power PadSeas & LOTS OF GOOD STUFF m F 1 Model Supply I I 0 I $5995 c-Jig House Wing & Jig Whether consider yourself novice expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee Ajustojig CoR R 1 Box 673NoblesvIle Indiana 46060317 877-2223 asked Perhaps studies can made question can posed again Sailplane forum South Africa notes Ive included another shot Andy Keil Skybird F3B design destroyed rebuilt day before left Sacramento 1981 F3B World Championships Keil placed sixth contestwhich wasnt bad bird crudely painted aerosol paint can using motel parking lot spray booth Skybird however designed no less enthusiasm glass ships Dassel Spartakus camps Beaudry Pautz Louis Barendse com bined talents Andy produced model see photos Several clever ideas went Skybird design tnstead conventional removable canopy-type hatch provide accessability airborn equipment Skybird design incorporates removable nose extends back leading edge wing fillet see March 1982 Model Aviahon allows servos receiver battery ballast accessible since its mounted securely fuselage keel conforms profile removable nose section wing halves joined inside fuse lage unlike full-scale procedures much like Swiss Spartakus Such semblies close one-piece wing tegrity construction can get photo horizontal stabs shows neat way assemble two halves dont come apart No wire clips no set screws no kinked wires just use Du Bro ball link bury socket portion half stab during construction As column being finished word received Keil won South African Nationals second year row side note Keil refused remuner ation photos printed Instead said pass payment USA/F3B Team Fund said nice guys finish last ESE No 5000 honor goes James Merrill Werribee Victoria Australia Bob Summers LSF vice-president Foreign Coordinator says nearly 30 countries interest members LSF program 17 have Foreign Coordinators LSF members outside USA read column can contact Bob wish coordinate re spective countries Write Bob Summers LSF/3548 81 Fay Dr Enon OH 45323 USA Bob also asked point out foreign members have Coordinator should submit records receive new forms through respective coordinators especially true Canada coordinator Dave Henshaw 2865 Skyline Dr Windsor Ontario Canada N9E 3A6 New LSF Level V first 1983and 28th out 5000 membersis Dr Walt Good LSF/063 Port Richey FL youre newcomer sport its fair know Dr Good directly responsible sport enjoying About 30 years ago instrumental getting license-free radio use modeling 27 megacycles called before become overused what seemed like everything else also involved development Thermal Sniffler Congratulations Doe well done Theres still time support AERONCA C3 MASTER QUARTER SCALE FOR 60 TWO CYCLE OR 12 OPPOSED TWIN 4 CYCLE ENGINES 108 SPAN1280 SQ IN QUARTER SCALE PLAN SET $2100 VOGEL AVIATION BOX 54 BLDG6 RESEDA CALIF 91335 PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpass Wor/nsh- Pedormance July 1983 149 UIIDS WING STAB & FUSELAGE CHOICE OF MODELERS THE WORLD OVER Authentic Scale F-i 6 CORKNALS o. 0 cut Ph lIt Items included kit Wheels Hinges Landing gear control horns Special tools o fuel tank Noxe wheel faring Necessary linkage AII required fasteners Three complete decal sets Balsa plywood die-cut parts Scale flying stab assembly Shock-absorbing nose wheel assembly Hand-layed fiberglass fuse lpolyesterl Detailed canopy cockpit assembly Detailed fully illustrated assembly book Pre shaped control surfaces liniection molded polystrysnel Three-view detailed decal painting instructions lniection molded wings withe...__ aluminum extruded wing spars already molded ion fuselage Detailed fiberglass fuselage includes the in stalled items fan bulkhead/wing mounting spar Nyrods control rods thrust tube detailed exhaust cone molded armament F-16 Kit Retail value $27026 Factory price $22972 plus $1050 shipping Byro-Jets exclusive quick start capabilities makes engine starting fast easy safe No complicated belt stare procedures no hatches remove reassemble Simply attach starter extension Sullivan starter. insert assembly through tail pipe until contact made rotorand hit starter addition increasing power output unique custom Byro-Jet Pipe System provides necessary noise suppression means completely conceal tuned pipe within fuselage Available both side rear exhaust 60 engines detailed information send $200 postage handling ATIONS 750 sq eaoy-bo-hiy- 9Ya lbs ess opt tan... .cketsl Byron Originals PO Box 279 Ida Grove Iowa 51445 Ph 712-364-3165 USA/E3B team Patches $6 lapel pins $5 vinyl decals $3 Send R C Odle 815 Mellow Ln Simi Valley CA 93065 Make checks payable F3B Soaring TeamGood lift passing away Lee Renaud has brought man Y queries what can done memory family close friends have decided anyone wishing contribute 10 memory may send con tribution AMA Building Fund/Lee Re naud Memorial monies will set aside tribute hin AMA library Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ScalelWischers CnntinuAd naae 45 necessary Heavy-wire bending can problem Most models use music wire some point structure landing gears example kit builder finds parts ready-formed box sugges tion use wire bender Breiten Coil Bender comes two sizes 5A2 3/~ diameter wire K&S Engineering makes Mighty Wire Bender I/v through /4-in music wire cutting wire use Dremel Moto Tool abrasive cutting wheel Wear eye protection using tool Cutting bulkheads ribs sheet balsa can simplified tracing parts drafting vellum semi transparent paper Lay vellum over drawing trace part outline using straightedge available draftsmans curves assure accurate copies Tack-glue vellum sheet balsa cut through paper balsa Double-coated tape sticky both sides convenience Vellum can purchased rolls sheets artist drafting supply stores straight wing ribs alike make rib template aluminum thin plywood use cutting guide advantages scratch-building opportunity select materials best suited purpose Strength weight pans controlled builder Select straight hard balsa wing spars use spruce ensure warp-free construction Wing ribs can made lighter balsa make practice weigh sheet balsa use sheets near equal weight ribs avoid situation wing becomes heavier Heavy sheets hard balsa should used stress points absorbing loads such firewall wing saddle landing gear attachment Lightest balsa goes tail surfaces wing ribs sheeted surfaces temptatioin substitute plywood balsa keep mind average weight ratio about 4 other words Av ply can substituted /4-in medium-weight balsa usually considerable gain strength /4-in balsa can cemented along its edges directly adjacent parts un-in ply requires gussets along edges secure fastening benefits scratch-building 150 Model Aviation No other ducted fan model comes close Opt Tanks & Retail value $3706 Factory price $3150 includes shipping Powered proven Bijiet ducted fan system
Edition: Model Aviation - 1983/07
Page Numbers: 42, 43, 148, 149, 150
Radio Control SOARING Dan Pruss 42 Model Aviation USA RC Soaring forum April column mention made Soar Tech set papers available through Herk Stok ley Mentioned also Switzerlands anAutomatic line-retrievers becoming standard equipment contest work quiet efficient compared dirt bikes motorcycles drivers fees etc Photo Dave Corven dress Detroit Sno-Fli sometimes open shirt sun glasses no glovesbut downfilled jacket just case CD controls preregistrations Ken Bates shows off originaldesign Standard class 1 00-in E-203 craft Dave Corven photo nual International RC Soaring Flight Forum 1SF Both contributions soaring have stirred imagination quite few folks US As suggested end column surely room similar forum column being prepared Al Scidmore Madison WI already formu e Michigans Joe Feather launches 2-Meter Icarus Pic Dave Corven Ray Hayes Indiana resident launches Bird ot Time Meet used two winches its own automatic towline retrieval system gave nearly 250 launches 6 hours Dave Corven photograph lating such idea Dates arent firm yet plans being made hold forum first part November 1983 What will program depends what can contribute forum being planned modelers modelers will base exchanging ideas course will excellent opportunity just gathering information Some ideas Al discussed hoped modelers would present include mold-making construction tech niques foam cutting design theories airfoil discussions would good op portunity thick airfoil advocates debate thin airfoil scholars Continued page 148 July 1983 43 5outh Africas winningest sailplane Andy Keil Skybird has won consecutive South African Nats last world champswill York England year Below clever way joining stabilizer halves Du-Bro ball link end joiner-rod snaps ball socket buried other stab Below left see wing blade joiner Andys craft Full-scale technique gives max strength good alignment Photos Keil iwr Ir-LIflD 5CHANNEL SYSTEM K-Line imported radio control systems Kraft manufactured tested Krafts specifications provide inexpensive radios same solid record reliability made Kraft plant Vista California THE KP5K 5-CHANNEL R/O SYSTEM FEATURES Smooth precise feel gimbals ratcheted trims Dual rate switches Built-in telescoping antenna Impact resistant Kraft gold color case Double-tuned high sensitivity receiver plug-in crystal Full NiCads dual LED charger complete accessory hardware package Four KPS-25K servos carbon button wiper 5 pole motor 180-day limited warranty See RIO hobby dealer write brochure complete line Kraft products IWT5Y5TEMS 450 W California Avenue P 0 Box 1268 Vista California 92083 RAPPING FLYER 2 Sn"Boo 2 PARLOR COPTERS Spa. $395 ENDURANCE RUBBER MODELS THE EASY B3 IMS GliderS 12 Span 3 PARLOR PLANES IS Span $896 THE SLOWPOKE Spa Pa P p T THE TIME MACHINE PENNY 2 Yard Birds 12 118 OZ PLANE iUSpan c Plop SOBSI 18 13 MINIATURE SCALE AIRCRAFT KITS ea $095 OUTSTANDING DETAILS 3-VIEWS & HISTORY 045 Strip Wood Light Sheet Hardware & Prop U Heat Transfers Japanese Tissue U PLASTIC CYLINDERS ALCO HEATH 3 ALCO SPORT 1929 ZIPPY SPORT ARV WATERMAN RACER 1921 HEATH PARASOL 1928 AERONCA K 1937 Span 16 Length 9 INDOOR MODEL AIRPLANES Lew Gitlow 48 pgs 100 illust reprint PLAN. $395 PEANUT POWER Hannan 80 pgs 895 INDOOR BALSA PACK $095 P-NUT PACK $095 JAPANESE TISSUE 10 Ige 5 col roll $595 ENSER PAPER 21$250 MICROLITE $325 RUBBER LUBE $150 BALSA CEMENT $150 5 THRUST BEARINGS Mini Dual Dual 00 PIRELLI RUBBER 020 090 & 125 235 3 61 WINDER $395161 MARK 1 $1195 P-NUT CO-2 ENGINE $3495 CHARGER $095 P-NUT PROP PACK 4 props shafts ... $295 SCALE CYLINDERS 5 pack 318& 112 100 MS P-NUT PLANS ALL 510 sheets 500 ADD 10% POSTAGEMINIMUM POSTAGE $180 1983-4 CATALOG IS ILLUST PGS $150 V IW 395T Torrance CA 90510 RC Soaring/Pruss Continued page 43 would restrictions neither type Sailpianes presented discussed nor subject matter However ideas might have would first have cleared through Al subjects can also include electronic end sport airborne test equipment telemetering devices etc wouldnt restrictions model discussions either So inter ests Two-meter F3B Scale CrossCountry above just Sailplanes feed ideas Al Scidmore 5013 Dorsett Dr Madison WI 53711 USA FAI RC Soaring Team Selection Com mIttee tollowing list arranged accord ing AMA District identifies new F3B Team Selection Committee elected participants 1980 1982 programs will serve 1984 pro gram meantime committee will serve clearinghouse FAI rules pro posals ClAM next Decembers meeting District 1Dwight Holley 151 Chestnut Ridge Bethel CT 06801 District LI William Meleske 786 Grand Terrace Ave Baldwin NY 11510 District ILlTerry Luckenbach 5460 Colony Dr Bethlehem PA 18017 District IVHerk Stokley Chairman 1504 Horseshoe Circle Vir ginia Beach VA 23451 District VBlame Miller 4411 Tidewater Dr Orlando FL 32806 District VIJack Hiner 2213 Pren tice Creek Downers Grove IL 60515 Dis trict VIIWarren Tiahrt 7647 Twilight Ct Clarkston Ml 48016 District VILIDon Chancey 1600 Laurel Ln PIano TX 75006 District IXSkip Miller 655 Max well Ave Boulder CO 80302 District XLarry Jolly 5501 W Como Santa Ana CA 92703 District XIDavid W Johnson 3526 NE 90 Portland OR 97220 Proposals cleared com mittee must returned AMA Sep tember 1 order get proper review proposals must submitted com mittee time meet September dead line further details see page 110 July 1982 Model Atiarioi Individual mod elers must first send proposals AMA HQ no later July 15 AMA HQ directs proposals Team Selection Committee above dates havent convenient because team selection schedules past meet ClAM schedule its time frame have live within So circle dates calendar RC Glider net No its apparatus new landing event Its Amateur Radio Service network mentioned briefly end April column Alden Shipp WB9WAJ said II new check-ins first week came Colorado North Carolina net Amateur Radio fans operates Monday evenings 2330Z Frequency 7240 MHz andNet control Bob Summers W8BBY Enon OH Alden Shipp Quincy IL Sno-Fli February 20 1983 Couldnt s no snow did anyway According contest director Warren Tiahrt Greater Detroit Soaring Hiking So cietys 13th annual bash drew 61 entries Thats all-time high Over 13 years temperatures have ranged well below zero years 59 degreesalso alltime high 61 entries broke down 22 Unlimited class 37 Standard class plus two Junior-Senior entries commom twist contests among more clubs allow smaller birds compete larger category such Standard class Unlimited allowing Two-Meter Standard Unlimited classes years Sno-Fli four 19 Two-Meter ffiers muscled up Un limited class whilie 14 entered Standard class Know what happened John Hoover Sagitta 600 took first place Unlimited 1403 points Ray DeNoble outdid John point scored 1404 Gentle Lady win Standard class double whammy Two-Meter ships has contest director posing question time forget Unlimited class separate category Standard class isnt first time that has 148 Model Aviation Dl I OR CUSTOM II QUADRA ENGINES S SSORIES Let us update old engines Sales repair services WE ALSO FEATURE eGIANT SCALE KITS AND SEMI KITS CLEAR WHITE PINE STOCK-SIZES 1/4 SCALE DUMMY RADIAL MOTORS CUSTOM KIT CUTTING SERVICE GIANT SCALE BLUE PRINTS BIG IS BETTER SEND $200 FOR OUR NEW CATALOG KITs 21 Old Time Gas 12 HL Gliders 11 Contest Rubber Send SO for4 Satellite Kits 82183 Catalog3 Nastalgia Power PadSeas & LOTS OF GOOD STUFF m F 1 Model Supply I I 0 I $5995 c-Jig House Wing & Jig Whether consider yourself novice expert model builder A-Justo Jig will improve aircraft construc tion e valuable time bargain A-Justo-Jig holds major com ponents proper alignment entire unit will rotate 36O permit fit glue plank shape sand con venient position No messy glu ing over plans waiting dry before beginning opposite side A-Justo-Jig will adjust rib former spacing lets build-in wing dihedral strong warp-free construction TO USE simple template rib indexing tool included locate drill holes rib alignment rods easy preparation takes approx 15 minutes average wing A-Justo-Jig builds em better Ask favorite hobby dealer Youll glad did arantee Ajustojig CoR R 1 Box 673NoblesvIle Indiana 46060317 877-2223 asked Perhaps studies can made question can posed again Sailplane forum South Africa notes Ive included another shot Andy Keil Skybird F3B design destroyed rebuilt day before left Sacramento 1981 F3B World Championships Keil placed sixth contestwhich wasnt bad bird crudely painted aerosol paint can using motel parking lot spray booth Skybird however designed no less enthusiasm glass ships Dassel Spartakus camps Beaudry Pautz Louis Barendse com bined talents Andy produced model see photos Several clever ideas went Skybird design tnstead conventional removable canopy-type hatch provide accessability airborn equipment Skybird design incorporates removable nose extends back leading edge wing fillet see March 1982 Model Aviahon allows servos receiver battery ballast accessible since its mounted securely fuselage keel conforms profile removable nose section wing halves joined inside fuse lage unlike full-scale procedures much like Swiss Spartakus Such semblies close one-piece wing tegrity construction can get photo horizontal stabs shows neat way assemble two halves dont come apart No wire clips no set screws no kinked wires just use Du Bro ball link bury socket portion half stab during construction As column being finished word received Keil won South African Nationals second year row side note Keil refused remuner ation photos printed Instead said pass payment USA/F3B Team Fund said nice guys finish last ESE No 5000 honor goes James Merrill Werribee Victoria Australia Bob Summers LSF vice-president Foreign Coordinator says nearly 30 countries interest members LSF program 17 have Foreign Coordinators LSF members outside USA read column can contact Bob wish coordinate re spective countries Write Bob Summers LSF/3548 81 Fay Dr Enon OH 45323 USA Bob also asked point out foreign members have Coordinator should submit records receive new forms through respective coordinators especially true Canada coordinator Dave Henshaw 2865 Skyline Dr Windsor Ontario Canada N9E 3A6 New LSF Level V first 1983and 28th out 5000 membersis Dr Walt Good LSF/063 Port Richey FL youre newcomer sport its fair know Dr Good directly responsible sport enjoying About 30 years ago instrumental getting license-free radio use modeling 27 megacycles called before become overused what seemed like everything else also involved development Thermal Sniffler Congratulations Doe well done Theres still time support AERONCA C3 MASTER QUARTER SCALE FOR 60 TWO CYCLE OR 12 OPPOSED TWIN 4 CYCLE ENGINES 108 SPAN1280 SQ IN QUARTER SCALE PLAN SET $2100 VOGEL AVIATION BOX 54 BLDG6 RESEDA CALIF 91335 PRODUCTS Complete Line Exhaust Systems * Tuned Pipes * Muffled Tuned Pipes * Headers Venturi Mufflers * Expansion Mufflers * Helicopter Ball Mufflers * Specialized Exhaust Systems Unsurpass Wor/nsh- Pedormance July 1983 149 UIIDS WING STAB & FUSELAGE CHOICE OF MODELERS THE WORLD OVER Authentic Scale F-i 6 CORKNALS o. 0 cut Ph lIt Items included kit Wheels Hinges Landing gear control horns Special tools o fuel tank Noxe wheel faring Necessary linkage AII required fasteners Three complete decal sets Balsa plywood die-cut parts Scale flying stab assembly Shock-absorbing nose wheel assembly Hand-layed fiberglass fuse lpolyesterl Detailed canopy cockpit assembly Detailed fully illustrated assembly book Pre shaped control surfaces liniection molded polystrysnel Three-view detailed decal painting instructions lniection molded wings withe...__ aluminum extruded wing spars already molded ion fuselage Detailed fiberglass fuselage includes the in stalled items fan bulkhead/wing mounting spar Nyrods control rods thrust tube detailed exhaust cone molded armament F-16 Kit Retail value $27026 Factory price $22972 plus $1050 shipping Byro-Jets exclusive quick start capabilities makes engine starting fast easy safe No complicated belt stare procedures no hatches remove reassemble Simply attach starter extension Sullivan starter. insert assembly through tail pipe until contact made rotorand hit starter addition increasing power output unique custom Byro-Jet Pipe System provides necessary noise suppression means completely conceal tuned pipe within fuselage Available both side rear exhaust 60 engines detailed information send $200 postage handling ATIONS 750 sq eaoy-bo-hiy- 9Ya lbs ess opt tan... .cketsl Byron Originals PO Box 279 Ida Grove Iowa 51445 Ph 712-364-3165 USA/E3B team Patches $6 lapel pins $5 vinyl decals $3 Send R C Odle 815 Mellow Ln Simi Valley CA 93065 Make checks payable F3B Soaring TeamGood lift passing away Lee Renaud has brought man Y queries what can done memory family close friends have decided anyone wishing contribute 10 memory may send con tribution AMA Building Fund/Lee Re naud Memorial monies will set aside tribute hin AMA library Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ScalelWischers CnntinuAd naae 45 necessary Heavy-wire bending can problem Most models use music wire some point structure landing gears example kit builder finds parts ready-formed box sugges tion use wire bender Breiten Coil Bender comes two sizes 5A2 3/~ diameter wire K&S Engineering makes Mighty Wire Bender I/v through /4-in music wire cutting wire use Dremel Moto Tool abrasive cutting wheel Wear eye protection using tool Cutting bulkheads ribs sheet balsa can simplified tracing parts drafting vellum semi transparent paper Lay vellum over drawing trace part outline using straightedge available draftsmans curves assure accurate copies Tack-glue vellum sheet balsa cut through paper balsa Double-coated tape sticky both sides convenience Vellum can purchased rolls sheets artist drafting supply stores straight wing ribs alike make rib template aluminum thin plywood use cutting guide advantages scratch-building opportunity select materials best suited purpose Strength weight pans controlled builder Select straight hard balsa wing spars use spruce ensure warp-free construction Wing ribs can made lighter balsa make practice weigh sheet balsa use sheets near equal weight ribs avoid situation wing becomes heavier Heavy sheets hard balsa should used stress points absorbing loads such firewall wing saddle landing gear attachment Lightest balsa goes tail surfaces wing ribs sheeted surfaces temptatioin substitute plywood balsa keep mind average weight ratio about 4 other words Av ply can substituted /4-in medium-weight balsa usually considerable gain strength /4-in balsa can cemented along its edges directly adjacent parts un-in ply requires gussets along edges secure fastening benefits scratch-building 150 Model Aviation No other ducted fan model comes close Opt Tanks & Retail value $3706 Factory price $3150 includes shipping Powered proven Bijiet ducted fan system