A ro Add strength models little gain weight techniques old hills theyre worth repeatingU Larry Kruse HOW WELL aircraft flies long lasts two things direct proportion strength-to-weight ratio built Although dont want present new corollaries generally speaking lightweight strong planes fly better last longer heavy weak ones realize may wonder know true considering Ive experience latter however Im going forge ahead anyway several good tips building both lightweight strong ships can used beginning modeler Proper stress compensation gusseting can much toward adding durability model adding corresponding weight penalty 64 Model Aviation common construction mistakes shown Fig 1A Gussets cut grain running vertical base triangle add strength direc tion Gussets cut like Fig 1B add lateral longitudinal torsional strength Gussets Scale ships can handled bit differently sake appearance areas harsh straight line triangular gusset might interrupt flow curved tail surface Once gusset installed can rounded jewelers file sandpaper wrapped around small dowel conform curvature structure supports drop two Hot Stuff rounded-out gusset will give strength will require see Fig 1C Figure 1D shows yet another style gusset useful ships light structural weight paramount importance Take pains assure gusset cut correct angles both ends since theres lot gluing surface available Fig 2 shows installation spar webbing extremely useful ships multispar wing structures subject breaking impacts hard dethermal ized landings being flipped over wind Either illustrated installations preferable interior place ment web probably best strength/weight standpoint since gives I-beam configuration Such placement difficult obviously gluing webbing side spar Dihedral braces plywood hard balsa constitute another type problem Kit manufacturers model designers alike have cut dihedral braces off 900 angles ends since beginning modeling see Fig 3A Such practice simply moves stress forces out both ends braceand offers convenient place break occur directly across grain wood Fig B shows better solution problem Braces cut angle utilize shear strength balsa significantly greater strength across grain Rib installation seems easiest tasks modeling truth critical Ribs meet leading edge trailing edge joints squarely will weaken wing significantly Likewise ribs forced position because excessive length induce warps cannot effectively corrected Figure 4A shows problem caused oversized ribs Figure 4B shows solution can employed wing structure Notches leading trailing edges allow rib moved backward forward compen sate some variable-sizing problems convenient notcher can made broken hacksaw blade Two blade segments taped together give cut / 16-in ribs slip nicely Three sections just right 3/32-in ribs can control depth cut piece masking tape placed parallel length blade exact depth wish make cut Simply saw notch down tape markContinued page 140 February 1983 65 Looking Hard Find Soaring Goodies S/lie Sai/Jne l7czc/ory Li has complete comprehensive line R/C Soaring products ever exist North America Li Our line products includes some respected firms Europe well complete inventory own US manufacturers Li We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products L] We serve serious RIC soaring enthusiast supplies kits other items have sought torso long * See display 1983 WRAM Toledo shows * Send $300 fully illustrated catalog Sailplane Factory717 244-4508 PO BOX 3419am 9pm EST Red Lion PA 17356 T6 SNJ Harvard 63 318 Span 1 Scale 60 Engine 8-9 lbsReady Fly model has molded rigid eurathane foam white epoxy jell coat surface picks up great amount detail Fuselage rings aileron fin rudder stabilizer elevator & cowl molded ready assembly installation equipment painting hardware including scale wheels struts extras Suggested List $285 Factory Direct $228 Send SASE brochure aPO Box 308 Tawas City MI 48763 reaL Lakes Model & morn LOin 15171362-6078 frequencies until end its useful life new six-meter frequencies come reserved new narrow-band equipment Frequency use will designated two ribbons streamers approximately 1/2 16 affixed top transmitter antenna according following table Freq MHzColors 5300 Black-Brown 53200 Black-Red 53300 Black-Orange 53400 Black-Yellow 53500Black-Green *53600Black-Blue *53700 Black-Purple *53800 Black-Gray Note no channel number assigned *Not generally use recognized ap propriate RC use ARRL band plan effect prior April 1982 F Additional Items a Frequency Pins Frequency pins usually clothespins should also employed new frequency channel control system club flying sites contests New pins should both channel-numbered color-coded As past no RC transmitter should turned unless pin its frequency channel attached its antenna b Special 72 MHz Considerations avoid coexistence problems between new old 72 MHz frequencies during phase-in period fre quency control boards club flying fields contests must show frequencies/chan nels authorized use during specific portion phase-in period example throughout first five years 72 MHz air craft-only band control clipboard would show pins six existing seven chan nels new Channel 12 82030 evennumbered Channels 38 40 42 etc up Channel 56 odd-numbered channels would blocked out would used during period c Active Frequency Control Local RC clubs encouraged look new types active frequency control devices Scanning receivers spectrum analyzers simple tunable converters hooked up automobile radios typical types devices can help role d Telemetry Devices flier using tel emetry device such thermal tensor should display single ribbon streamer transmitter antenna several inches below flag/ ribbon combination designates control frequency telemetry device 49 MHz frequencies see paragraph B color coding flier licensed amateur telemetry device amateur two-meter band 144148 MHz single red streamer will used Brace Yourself/Kruse Continued page 65 Any moving part will eventually wear out friction real wear problems Ive Free Flight has leading edge stabilizer pivots dethermalized position tried silk nylon finally fiberglass overlay stop wear squashing balsa before finally hit upon method shown Fig 5 dowel insert easy install shows no wear over two full flying seasons Its Jim Clems idea Sheet surfaces real problem too par ticularly some lighter structures require fuel-proofing order last Fig 6 shows two techniques help prevent warps such surfaces cap-strip method just effective less work terms matching surfaces gluing light coats dope thinned much 5060% preferable couple heavy coats latter will undoubtedly put warps fairly sturdy structures Being concerned subordinate struc tures will pay off planes fly well long time Take little time brace stucture carefully 140 Model Aviation IN run IIVIIVIEUIpI wIEIe New 22 CDl QUADRA $10495 Rag 22 QUADRA $9496 Brlslghalla Flywheal *11496 Rag 22 QUADRA POWER ASSEMBLY ONLY*1496 QUADRA REPAIR*1000 pIus parts P&W RADIAL ENGINES Fleat*2296 JIm Massar SRCOUPEPLAN5 $2396 KIT $22996 IIm Msaar TOMAHAWKPLANS $2396 KIT 824996 BALSA BASSWOOD tall slzeal36% OFF Concept FLEETKIT $17996 FG COWL $1996 QUADRA fual tanks16 *89632 $796 Y VICKER5 LEWIS MACHINE GUN KITS$1496 ALL cECONITE PRODUCTS10% OFF PLANS SUPER STEARMAN V Godfrey$2800 STARDUSTER TOO IBrIsIghellal$2996 scala J3 CUB Ina$tz FLEET Concapt$2996 vOLKSPLANE ChIcken Charlie*2396 FLY BABY $1896 SE-5 Rausthl $2496 COCKPIT KITS Tomahawk F4U-1 SpItfire *2196 Ercoupa $1996 Steerman *2096 Cltabrla $2496 J3 Cub $1996 ME-10$ $2160 Fleet $2096 FIBERGLASS ARROW SHAFTS 516 *32 1g61*1000 24-Hour Service. Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View Dr. Allegany NY 14706 VIDEO VIDEO GIANT SCALE IMAA Festival 81 VHS Cassette SALE RENTAL Send sase Details FLYING 8 PRoDUCTIONS R #15 Box 796 BEDFORD INDIANA 47421
Edition: Model Aviation - 1983/02
Page Numbers: 64, 65, 140
A ro Add strength models little gain weight techniques old hills theyre worth repeatingU Larry Kruse HOW WELL aircraft flies long lasts two things direct proportion strength-to-weight ratio built Although dont want present new corollaries generally speaking lightweight strong planes fly better last longer heavy weak ones realize may wonder know true considering Ive experience latter however Im going forge ahead anyway several good tips building both lightweight strong ships can used beginning modeler Proper stress compensation gusseting can much toward adding durability model adding corresponding weight penalty 64 Model Aviation common construction mistakes shown Fig 1A Gussets cut grain running vertical base triangle add strength direc tion Gussets cut like Fig 1B add lateral longitudinal torsional strength Gussets Scale ships can handled bit differently sake appearance areas harsh straight line triangular gusset might interrupt flow curved tail surface Once gusset installed can rounded jewelers file sandpaper wrapped around small dowel conform curvature structure supports drop two Hot Stuff rounded-out gusset will give strength will require see Fig 1C Figure 1D shows yet another style gusset useful ships light structural weight paramount importance Take pains assure gusset cut correct angles both ends since theres lot gluing surface available Fig 2 shows installation spar webbing extremely useful ships multispar wing structures subject breaking impacts hard dethermal ized landings being flipped over wind Either illustrated installations preferable interior place ment web probably best strength/weight standpoint since gives I-beam configuration Such placement difficult obviously gluing webbing side spar Dihedral braces plywood hard balsa constitute another type problem Kit manufacturers model designers alike have cut dihedral braces off 900 angles ends since beginning modeling see Fig 3A Such practice simply moves stress forces out both ends braceand offers convenient place break occur directly across grain wood Fig B shows better solution problem Braces cut angle utilize shear strength balsa significantly greater strength across grain Rib installation seems easiest tasks modeling truth critical Ribs meet leading edge trailing edge joints squarely will weaken wing significantly Likewise ribs forced position because excessive length induce warps cannot effectively corrected Figure 4A shows problem caused oversized ribs Figure 4B shows solution can employed wing structure Notches leading trailing edges allow rib moved backward forward compen sate some variable-sizing problems convenient notcher can made broken hacksaw blade Two blade segments taped together give cut / 16-in ribs slip nicely Three sections just right 3/32-in ribs can control depth cut piece masking tape placed parallel length blade exact depth wish make cut Simply saw notch down tape markContinued page 140 February 1983 65 Looking Hard Find Soaring Goodies S/lie Sai/Jne l7czc/ory Li has complete comprehensive line R/C Soaring products ever exist North America Li Our line products includes some respected firms Europe well complete inventory own US manufacturers Li We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products L] We serve serious RIC soaring enthusiast supplies kits other items have sought torso long * See display 1983 WRAM Toledo shows * Send $300 fully illustrated catalog Sailplane Factory717 244-4508 PO BOX 3419am 9pm EST Red Lion PA 17356 T6 SNJ Harvard 63 318 Span 1 Scale 60 Engine 8-9 lbsReady Fly model has molded rigid eurathane foam white epoxy jell coat surface picks up great amount detail Fuselage rings aileron fin rudder stabilizer elevator & cowl molded ready assembly installation equipment painting hardware including scale wheels struts extras Suggested List $285 Factory Direct $228 Send SASE brochure aPO Box 308 Tawas City MI 48763 reaL Lakes Model & morn LOin 15171362-6078 frequencies until end its useful life new six-meter frequencies come reserved new narrow-band equipment Frequency use will designated two ribbons streamers approximately 1/2 16 affixed top transmitter antenna according following table Freq MHzColors 5300 Black-Brown 53200 Black-Red 53300 Black-Orange 53400 Black-Yellow 53500Black-Green *53600Black-Blue *53700 Black-Purple *53800 Black-Gray Note no channel number assigned *Not generally use recognized ap propriate RC use ARRL band plan effect prior April 1982 F Additional Items a Frequency Pins Frequency pins usually clothespins should also employed new frequency channel control system club flying sites contests New pins should both channel-numbered color-coded As past no RC transmitter should turned unless pin its frequency channel attached its antenna b Special 72 MHz Considerations avoid coexistence problems between new old 72 MHz frequencies during phase-in period fre quency control boards club flying fields contests must show frequencies/chan nels authorized use during specific portion phase-in period example throughout first five years 72 MHz air craft-only band control clipboard would show pins six existing seven chan nels new Channel 12 82030 evennumbered Channels 38 40 42 etc up Channel 56 odd-numbered channels would blocked out would used during period c Active Frequency Control Local RC clubs encouraged look new types active frequency control devices Scanning receivers spectrum analyzers simple tunable converters hooked up automobile radios typical types devices can help role d Telemetry Devices flier using tel emetry device such thermal tensor should display single ribbon streamer transmitter antenna several inches below flag/ ribbon combination designates control frequency telemetry device 49 MHz frequencies see paragraph B color coding flier licensed amateur telemetry device amateur two-meter band 144148 MHz single red streamer will used Brace Yourself/Kruse Continued page 65 Any moving part will eventually wear out friction real wear problems Ive Free Flight has leading edge stabilizer pivots dethermalized position tried silk nylon finally fiberglass overlay stop wear squashing balsa before finally hit upon method shown Fig 5 dowel insert easy install shows no wear over two full flying seasons Its Jim Clems idea Sheet surfaces real problem too par ticularly some lighter structures require fuel-proofing order last Fig 6 shows two techniques help prevent warps such surfaces cap-strip method just effective less work terms matching surfaces gluing light coats dope thinned much 5060% preferable couple heavy coats latter will undoubtedly put warps fairly sturdy structures Being concerned subordinate struc tures will pay off planes fly well long time Take little time brace stucture carefully 140 Model Aviation IN run IIVIIVIEUIpI wIEIe New 22 CDl QUADRA $10495 Rag 22 QUADRA $9496 Brlslghalla Flywheal *11496 Rag 22 QUADRA POWER ASSEMBLY ONLY*1496 QUADRA REPAIR*1000 pIus parts P&W RADIAL ENGINES Fleat*2296 JIm Massar SRCOUPEPLAN5 $2396 KIT $22996 IIm Msaar TOMAHAWKPLANS $2396 KIT 824996 BALSA BASSWOOD tall slzeal36% OFF Concept FLEETKIT $17996 FG COWL $1996 QUADRA fual tanks16 *89632 $796 Y VICKER5 LEWIS MACHINE GUN KITS$1496 ALL cECONITE PRODUCTS10% OFF PLANS SUPER STEARMAN V Godfrey$2800 STARDUSTER TOO IBrIsIghellal$2996 scala J3 CUB Ina$tz FLEET Concapt$2996 vOLKSPLANE ChIcken Charlie*2396 FLY BABY $1896 SE-5 Rausthl $2496 COCKPIT KITS Tomahawk F4U-1 SpItfire *2196 Ercoupa $1996 Steerman *2096 Cltabrla $2496 J3 Cub $1996 ME-10$ $2160 Fleet $2096 FIBERGLASS ARROW SHAFTS 516 *32 1g61*1000 24-Hour Service. Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View Dr. Allegany NY 14706 VIDEO VIDEO GIANT SCALE IMAA Festival 81 VHS Cassette SALE RENTAL Send sase Details FLYING 8 PRoDUCTIONS R #15 Box 796 BEDFORD INDIANA 47421
Edition: Model Aviation - 1983/02
Page Numbers: 64, 65, 140
A ro Add strength models little gain weight techniques old hills theyre worth repeatingU Larry Kruse HOW WELL aircraft flies long lasts two things direct proportion strength-to-weight ratio built Although dont want present new corollaries generally speaking lightweight strong planes fly better last longer heavy weak ones realize may wonder know true considering Ive experience latter however Im going forge ahead anyway several good tips building both lightweight strong ships can used beginning modeler Proper stress compensation gusseting can much toward adding durability model adding corresponding weight penalty 64 Model Aviation common construction mistakes shown Fig 1A Gussets cut grain running vertical base triangle add strength direc tion Gussets cut like Fig 1B add lateral longitudinal torsional strength Gussets Scale ships can handled bit differently sake appearance areas harsh straight line triangular gusset might interrupt flow curved tail surface Once gusset installed can rounded jewelers file sandpaper wrapped around small dowel conform curvature structure supports drop two Hot Stuff rounded-out gusset will give strength will require see Fig 1C Figure 1D shows yet another style gusset useful ships light structural weight paramount importance Take pains assure gusset cut correct angles both ends since theres lot gluing surface available Fig 2 shows installation spar webbing extremely useful ships multispar wing structures subject breaking impacts hard dethermal ized landings being flipped over wind Either illustrated installations preferable interior place ment web probably best strength/weight standpoint since gives I-beam configuration Such placement difficult obviously gluing webbing side spar Dihedral braces plywood hard balsa constitute another type problem Kit manufacturers model designers alike have cut dihedral braces off 900 angles ends since beginning modeling see Fig 3A Such practice simply moves stress forces out both ends braceand offers convenient place break occur directly across grain wood Fig B shows better solution problem Braces cut angle utilize shear strength balsa significantly greater strength across grain Rib installation seems easiest tasks modeling truth critical Ribs meet leading edge trailing edge joints squarely will weaken wing significantly Likewise ribs forced position because excessive length induce warps cannot effectively corrected Figure 4A shows problem caused oversized ribs Figure 4B shows solution can employed wing structure Notches leading trailing edges allow rib moved backward forward compen sate some variable-sizing problems convenient notcher can made broken hacksaw blade Two blade segments taped together give cut / 16-in ribs slip nicely Three sections just right 3/32-in ribs can control depth cut piece masking tape placed parallel length blade exact depth wish make cut Simply saw notch down tape markContinued page 140 February 1983 65 Looking Hard Find Soaring Goodies S/lie Sai/Jne l7czc/ory Li has complete comprehensive line R/C Soaring products ever exist North America Li Our line products includes some respected firms Europe well complete inventory own US manufacturers Li We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products L] We serve serious RIC soaring enthusiast supplies kits other items have sought torso long * See display 1983 WRAM Toledo shows * Send $300 fully illustrated catalog Sailplane Factory717 244-4508 PO BOX 3419am 9pm EST Red Lion PA 17356 T6 SNJ Harvard 63 318 Span 1 Scale 60 Engine 8-9 lbsReady Fly model has molded rigid eurathane foam white epoxy jell coat surface picks up great amount detail Fuselage rings aileron fin rudder stabilizer elevator & cowl molded ready assembly installation equipment painting hardware including scale wheels struts extras Suggested List $285 Factory Direct $228 Send SASE brochure aPO Box 308 Tawas City MI 48763 reaL Lakes Model & morn LOin 15171362-6078 frequencies until end its useful life new six-meter frequencies come reserved new narrow-band equipment Frequency use will designated two ribbons streamers approximately 1/2 16 affixed top transmitter antenna according following table Freq MHzColors 5300 Black-Brown 53200 Black-Red 53300 Black-Orange 53400 Black-Yellow 53500Black-Green *53600Black-Blue *53700 Black-Purple *53800 Black-Gray Note no channel number assigned *Not generally use recognized ap propriate RC use ARRL band plan effect prior April 1982 F Additional Items a Frequency Pins Frequency pins usually clothespins should also employed new frequency channel control system club flying sites contests New pins should both channel-numbered color-coded As past no RC transmitter should turned unless pin its frequency channel attached its antenna b Special 72 MHz Considerations avoid coexistence problems between new old 72 MHz frequencies during phase-in period fre quency control boards club flying fields contests must show frequencies/chan nels authorized use during specific portion phase-in period example throughout first five years 72 MHz air craft-only band control clipboard would show pins six existing seven chan nels new Channel 12 82030 evennumbered Channels 38 40 42 etc up Channel 56 odd-numbered channels would blocked out would used during period c Active Frequency Control Local RC clubs encouraged look new types active frequency control devices Scanning receivers spectrum analyzers simple tunable converters hooked up automobile radios typical types devices can help role d Telemetry Devices flier using tel emetry device such thermal tensor should display single ribbon streamer transmitter antenna several inches below flag/ ribbon combination designates control frequency telemetry device 49 MHz frequencies see paragraph B color coding flier licensed amateur telemetry device amateur two-meter band 144148 MHz single red streamer will used Brace Yourself/Kruse Continued page 65 Any moving part will eventually wear out friction real wear problems Ive Free Flight has leading edge stabilizer pivots dethermalized position tried silk nylon finally fiberglass overlay stop wear squashing balsa before finally hit upon method shown Fig 5 dowel insert easy install shows no wear over two full flying seasons Its Jim Clems idea Sheet surfaces real problem too par ticularly some lighter structures require fuel-proofing order last Fig 6 shows two techniques help prevent warps such surfaces cap-strip method just effective less work terms matching surfaces gluing light coats dope thinned much 5060% preferable couple heavy coats latter will undoubtedly put warps fairly sturdy structures Being concerned subordinate struc tures will pay off planes fly well long time Take little time brace stucture carefully 140 Model Aviation IN run IIVIIVIEUIpI wIEIe New 22 CDl QUADRA $10495 Rag 22 QUADRA $9496 Brlslghalla Flywheal *11496 Rag 22 QUADRA POWER ASSEMBLY ONLY*1496 QUADRA REPAIR*1000 pIus parts P&W RADIAL ENGINES Fleat*2296 JIm Massar SRCOUPEPLAN5 $2396 KIT $22996 IIm Msaar TOMAHAWKPLANS $2396 KIT 824996 BALSA BASSWOOD tall slzeal36% OFF Concept FLEETKIT $17996 FG COWL $1996 QUADRA fual tanks16 *89632 $796 Y VICKER5 LEWIS MACHINE GUN KITS$1496 ALL cECONITE PRODUCTS10% OFF PLANS SUPER STEARMAN V Godfrey$2800 STARDUSTER TOO IBrIsIghellal$2996 scala J3 CUB Ina$tz FLEET Concapt$2996 vOLKSPLANE ChIcken Charlie*2396 FLY BABY $1896 SE-5 Rausthl $2496 COCKPIT KITS Tomahawk F4U-1 SpItfire *2196 Ercoupa $1996 Steerman *2096 Cltabrla $2496 J3 Cub $1996 ME-10$ $2160 Fleet $2096 FIBERGLASS ARROW SHAFTS 516 *32 1g61*1000 24-Hour Service. Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View Dr. Allegany NY 14706 VIDEO VIDEO GIANT SCALE IMAA Festival 81 VHS Cassette SALE RENTAL Send sase Details FLYING 8 PRoDUCTIONS R #15 Box 796 BEDFORD INDIANA 47421