Technologies From Russia

Technologies Russia Soviet Union materials short supply planes engines hard come modelers go out design limb ones make mark professional mod eler Alexey Kashkin shares author some special technology latest FlA Towline Glider ESvetlana Filippova CONDITIONS under Russian modelers must operate force us innovative everything ourselves because its practically impossible buy models engines other stuff store should therefore come no surprise plenty original clever techniques constructing model airplanes engines can found Russia Suitable modeling materials scarce everybody tries sort out cheapest economical building methods same time best keep models strong light also try make efficient use time spent workshop especially true Russias professional modelers earn Alexey Kashkin group FlA models tail booms complex innovative tech niques fabricating taii booms wing spars ribs leading traiiing edges have evoived through years experimentation does building home living building flyingTowline Gliders foreign sportsmen modelsand sometimes selling themeven other modelers USSR asked him share some building secrets Model Aviation readers Alexey 28 years old has Aiexeys FIA fuselage some tail booms professional bulider has vented unusual molding technique making taii booms employs epoxy-and resin carbon fiber 0013-thick siumi num aiioy coating mirroriike finish 74 Model Aviation Recently talked Alexey Kashkin friend successfully sells FlA Ciose-up Aiexeys wing panels root ribs made fiberglass durabiuiy glass-smooth surface Alexeys aluminum-clad tail booms couldnt achieved ordinary building techniques flying models 18 years learned build sport school children Alexey took liking Free Flight F lA models hasnt changed mind yet After hed building models about year Alexey began experimenting different methods Most time found better techniques improved structures course some experiments unproductive thats expected type research Alexey second FlA USSR Cup contest 1986 completed tall boom equipment used make left right tail boom inner mold outer mold sheathed plug length surgical rub ber tubing connected pressure gauge Champion Air Force 1985 has placed well other contests during years professional modeler Soviet Air Force 1981 1989 Alexey matured builder developing perfecting own construction techniques Close-up Alexeys tail booms sandwich carbon fiber cloth tempered alumi num heat cured constant 1580 F pro duce gleaming mirrorlike finish August 1991 75 latest FlA Towline Glider Kashkin workshop awaits final assembly Well known FAI circles Alexey markets innovative designs Glider enthusiasts over world Aiexey dispimys Tuseisge timer mecnanism ne pians improve surface finish future fuselages substituting method developed making wing stabilizer leading edges fiberglass-covered wood structures currently builds Alexey has distilled decade experience latest FlA model secretor secretsof design complicated cant possibly summed up few words Instead Alexey sat down talked about model detail want describe things interested Alexey uses unusual technology ne uu4-in-inIcK wing ribs sawn lightweight hardwood balsa block has permanently covered layer carbon fiber cloth what will become upper lower airfoil surfaces Note chinks trailing edge make tail booms FlA Gliders Some special equipment needed inside outside forms molds length surgical rubber tubing kind used F2D Combat fliers fuel tanks can inflated air enlarged pressure gauge items shown accompanying photos inner form made fiberglass/epoxy exact shape size finished tail boomexcept its diameter reduced amount equal twice wall thickness future finished tail boom will see works moment Cotton Thread Foamed Plastic Y Spar Sheets Aliuminum Alloy 2 Layers Carbon - ---F Fig 1 Cut Tube Tail Boom Figure 1 Cross section tail boom show ing two carbon fiber iayers sandwiched between aluminum alloy sheets Heat curing constant temperature creates beauti ful mirrorlike finish Carbon / precisely just wrap around plug edges should meet exactly gap making ridge Put protective sheath inner mold prevent molded tail boom shell sticking wrap aluminum foil layers around Apply two layers carbon fiber cloth saturate epoxy wrap second aluminum sheet over everything Carefully insert wrapped plug outer mold remove plug protective nonstick sheath should remain mold Now put surgical rubber tube bladder hole left inner plug removed inflate pressure 206 psi Let cure hour oven similar heat source maintaining temperature constant 1580 F Alexey builds tail booms length 308 aluminum alloy covers 0013 thick sandwich shell boom 0012 booms big end has Fiber lsa Fig 2 Cut Wing Carbon Fiber Leading EdgeTrailing Edge \ Wooden Rib Figure 2 Wing cross section ribs glued slots cut balsa piece back side spar Note foam piastic leading edge outside mold formed around plug same size finished tail boom surface plug must perfectly smooth free blemishes Alexey makes outer mold first placing protective sheath can use same plastic film material used cover Combat models plug prevent fiberglass mold material sticking applies several layers fiberglass epoxy resin has cured removes plug As shown photo plug has handle molded its large end makes easy Carbon Fiber ThreadsFront Part Aluminum Alloy - Balsa 3 Junction Wing Spars Figure 3 Wing spar joiner rod dihe dral has cut aluminum alloy plate sandwiched between two pieces balsa right assembly shaped isa close fit inside di ameter hollow wing spars left diameter 056 tapers 02 finished weight 049 oz cross section sketch tail boom included new tail boom removed mold should have mirrorlike surface cant achieve conventional building techniques such merely covering plug aluminum carbon fiber letting cure open air must cut aluminum sheets extreme precision order get invisible full-length seam particularly careful outer sheet youve done everything properly will get Balsa RibCarbon Fiber Carbon Fiber / Trailing Edge Fig 4 Cut Stabilizer pull out fiberglass female mold have just made inside female mold will have perfectly smooth surface make tail boom itself first take two thin sheets tempered aluminum foil special materialnot kind Americans use wrap food sandwich two pieces carbon fiber cloth between aluminum carbon fiber pieces must cut very Keviar Threads lsa Sheets Aluminum Alloy Sheet B Technology Making Front Part Stab Figure 4 Cross section stabilizer leading edge B lamination 012 alumInum alloy two sheets 032 balsa Keviar threads inserted chink left between edges balsa sheets aluminum/balsa laminate bent glued place 76 Model Aviation very strong tail boom wonderfully shiny surface just like Alexeys wing spars made same way except three layers carbon fiber cloth root end layer tip end further difference spar has constant outside diameter Alexeys spars weigh 042 oz direction weave layers carbon fiber cloth critical can cross depending whats easiest Alexey uses carbon fiber trailing edges wings puts six layers carbon fiber cloth really flat surface saturates epoxy resin desired thickness 0032 applies pressure top epoxy cures uses diamond-coated cutting disk slice cured sheet strips 008 wide may seem like lot work resulting trailing edge lighter made wood will never warp wing ribs also made very clever way Make metal templates root tip ribs glue opposite sides wooden block Use lightweight hardwood balsa Use templates carve block wood sand smooth Remove templates Glue layer carbon fiber cloth around wood block sides corresponding upper lower surfaces airfoil Use epoxy resin adhere cloth put vacuum bag over cures necessary attach cloth firmly smoothly wood block epoxy has cured cut slot trailing edge portion block carbon fiber trailing edge piece made little earlier take diamond-edged saw slice block individual ribs 004 thick Two such sets ribs shown another photos wing leading edge sheeting made much same way tail boom spars However layer carbon fiber cloth used between two layers PPM. DOES ThE WOEK MANY ADHESIVES Use Ira Thread Lock BetterThan SiHccee AId Sties 1/4 Tire lime Seger C/As Attactring Coosples AS FresOc Rhergiaso Ports Totatly Clear Simple Use Org Fart So Mairgl Holds Casoples AllY Motafol Ireuding Plasoc CoveCogs Plo Pegging Clear Forts Holds Firnealls Fiberglass Moves Servos Mounted Arlynlirere WIhout Fear Totally Remostrie WUirost Ceasing Sanrege PPM. available go hobby retailer coil Innovative Model Products Toll Frgg 800 780-3190 10001368-3190 Dealer Inquirigs Wontgd lAdd $250 SaHI aluminum sheeting sketches shows Alexey makes leading edge Note based contoured piece foam plastic would take separate article tell make foam plastic part process widely used United States making wings CL Combat RC Pattern planes can find articles books magazines describing foam leading edge glued spars balsa piece added back side spar Vertical slots ribs cut balsa ribs glued Everything glued epoxy Alexey makes wing root ribs fiberglass durability root ribs can seen photograph Alexey holding two wing panels wing covered plastic film tautened hot iron heat gun Alexey covers tissue paper paints glues thick cotton thread turbulator strip upper side wing shown sketch PPM.USED BY IRE PIOS Col Art Jolmoon See SC ModeierApll iS ogre Sernon Tattee MasteO Winier Aird US Scale Team POOR Super lEdOor Scale lhV Modeler Frank Costello COluerrrltt Flying Modelal 0mg Homey Soutreasnem fontilbeter Scale R Modeler Matters Coorpetooll Mitre Mat Saper Stsr Helicopter PIlot PO Boa 4366Ales eneeeble Pm Margete FL 33063Hobby Lobby $995 may wondering Alexey gets dihedral wing panels type wing look Figure 3 will answer question Alexey makes spar joiner urodr built-in dihedral sandwiches aluminum alloy plate correct dihedral angle cut Continued page 78 ADAPTOR ThROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & II~jK O TO 5/32CAPIONALL DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL RPM ESS CHUCK $1895 DHMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCK3 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUTTING PLASliC WOOD SOFT METALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006 008 010 012 014 016 018 020 023 025 028 032 ThICKNESS 1 IDE DIAMETER @ $675 EA NO 502ARBOR$800 NO 5031 4 X 114 SAWS $600 OUR SAWS ONLY WORK WITH OUR ARBOR MICRO SELPSTARTlNG TORCH MT775 Blow Torch ncr SI buienni MT771 gataee 5 EASTERN TOOL & SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1006 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 CODADD$500FAX212-925-1010 No need flint matches Just press lire Piezo Sell-Starting button lot micro size adlust able lame barns 2370 ap 3 hours Operates standard cigarette lighter butane refillable Tank fits comfortably tire palm hand made hi5himpact rubber airows safe non slip comforlable grip Supplied can butane $3hSO SeoO August 1991 77 WIRE BENDERS No 322 No 323 K&S ENGINEERING 6917 W 59th St Chicago IL 60638 312 586-8503 SEND 50 FOR PRICE LIST AND CATALOG No324 INNOVATIVE MODEL PRODUCTS INC BRINGS YOU. uuuy SUPER STRONGmrtenoee PFMe Unee-Henreble end SUPER FLEXABLEFIVIT-- SUPER FASTage GRIPS TIGHT WHERE OTHERS OONT REMOVABLE WITHOUT TRACE SUPER ADHESIVE BIG37oz TUBE between two pieces balsa Finally whole assembly shaped closely matches inside diameter hollow wing spars trailing edges wing panels held position short length wire glued wing rib wire will stay put better its wrapped few layers cotton thread before being epoxied place wire slips metal tube fuselage Glider last thing Alexey explained builds stabilizer exception leading edge construction similar used wing ribs 0024-in-thick balsa carbon fiber trailing edge 002 thick 004 wide leading edge formed sheet 0012 aluminum alloy two sheets 0032 balsa laid flat true surface balsa adhered aluminum epoxy epoxy cured under pressure high temperature leaves little chink between edges balsa sheets epoxy has cured puts about 20 threads Kevlar chink bends aluminum balsa laminate around leading edge stab glues place uses plastic film covering Gliders fin balsa fiberglass plate glued top covered same way wings Alexey builds fuselage wood covers fiberglass future however intends use same methods described wing stabilizer leading edges way hell get better surface finish Alexeys construction techniques encompass fine points can described article length models use innovative methods throughout course Alexeys finished yet knows may discover totally new way building Free Flight models hope hell agree tell us about RC Pylon Racing/Hager Continued page 71 official no event should re-fly granted contestant has problem equipment Ready Area addition aircraft starting line aircraft should called back-up ready line front registration desk ready line should course between No 2 No 3 pylons see safety section Pit Boss pit boss could also transmitter impound boss impound ready areas adjacent should get heat cards registration desk using PA system call contestants heat back-up line contestant will called again heat moves ready line responsibility contestant ready line time heat moves starting line An efficient contest will turn around heats six minutes less start start next back-up line pit boss should inform contestant starting position heat moves starting line pit boss should see heat cards get starting line correct sequence Either pit boss some other contest official should notify starter either through intercom waving black flag aircraft flies over pit spectator area Flight Recorder flight recorder will have heat cards heat starting line will confirm contestants correct starting order recommended flight recorder have watch time first place finisher Near end race should help starter ascertain order finish As aircraft cross finish line flight Continued page 82 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 78 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861

Technologies Russia Soviet Union materials short supply planes engines hard come modelers go out design limb ones make mark professional mod eler Alexey Kashkin shares author some special technology latest FlA Towline Glider ESvetlana Filippova CONDITIONS under Russian modelers must operate force us innovative everything ourselves because its practically impossible buy models engines other stuff store should therefore come no surprise plenty original clever techniques constructing model airplanes engines can found Russia Suitable modeling materials scarce everybody tries sort out cheapest economical building methods same time best keep models strong light also try make efficient use time spent workshop especially true Russias professional modelers earn Alexey Kashkin group FlA models tail booms complex innovative tech niques fabricating taii booms wing spars ribs leading traiiing edges have evoived through years experimentation does building home living building flyingTowline Gliders foreign sportsmen modelsand sometimes selling themeven other modelers USSR asked him share some building secrets Model Aviation readers Alexey 28 years old has Aiexeys FIA fuselage some tail booms professional bulider has vented unusual molding technique making taii booms employs epoxy-and resin carbon fiber 0013-thick siumi num aiioy coating mirroriike finish 74 Model Aviation Recently talked Alexey Kashkin friend successfully sells FlA Ciose-up Aiexeys wing panels root ribs made fiberglass durabiuiy glass-smooth surface Alexeys aluminum-clad tail booms couldnt achieved ordinary building techniques flying models 18 years learned build sport school children Alexey took liking Free Flight F lA models hasnt changed mind yet After hed building models about year Alexey began experimenting different methods Most time found better techniques improved structures course some experiments unproductive thats expected type research Alexey second FlA USSR Cup contest 1986 completed tall boom equipment used make left right tail boom inner mold outer mold sheathed plug length surgical rub ber tubing connected pressure gauge Champion Air Force 1985 has placed well other contests during years professional modeler Soviet Air Force 1981 1989 Alexey matured builder developing perfecting own construction techniques Close-up Alexeys tail booms sandwich carbon fiber cloth tempered alumi num heat cured constant 1580 F pro duce gleaming mirrorlike finish August 1991 75 latest FlA Towline Glider Kashkin workshop awaits final assembly Well known FAI circles Alexey markets innovative designs Glider enthusiasts over world Aiexey dispimys Tuseisge timer mecnanism ne pians improve surface finish future fuselages substituting method developed making wing stabilizer leading edges fiberglass-covered wood structures currently builds Alexey has distilled decade experience latest FlA model secretor secretsof design complicated cant possibly summed up few words Instead Alexey sat down talked about model detail want describe things interested Alexey uses unusual technology ne uu4-in-inIcK wing ribs sawn lightweight hardwood balsa block has permanently covered layer carbon fiber cloth what will become upper lower airfoil surfaces Note chinks trailing edge make tail booms FlA Gliders Some special equipment needed inside outside forms molds length surgical rubber tubing kind used F2D Combat fliers fuel tanks can inflated air enlarged pressure gauge items shown accompanying photos inner form made fiberglass/epoxy exact shape size finished tail boomexcept its diameter reduced amount equal twice wall thickness future finished tail boom will see works moment Cotton Thread Foamed Plastic Y Spar Sheets Aliuminum Alloy 2 Layers Carbon - ---F Fig 1 Cut Tube Tail Boom Figure 1 Cross section tail boom show ing two carbon fiber iayers sandwiched between aluminum alloy sheets Heat curing constant temperature creates beauti ful mirrorlike finish Carbon / precisely just wrap around plug edges should meet exactly gap making ridge Put protective sheath inner mold prevent molded tail boom shell sticking wrap aluminum foil layers around Apply two layers carbon fiber cloth saturate epoxy wrap second aluminum sheet over everything Carefully insert wrapped plug outer mold remove plug protective nonstick sheath should remain mold Now put surgical rubber tube bladder hole left inner plug removed inflate pressure 206 psi Let cure hour oven similar heat source maintaining temperature constant 1580 F Alexey builds tail booms length 308 aluminum alloy covers 0013 thick sandwich shell boom 0012 booms big end has Fiber lsa Fig 2 Cut Wing Carbon Fiber Leading EdgeTrailing Edge \ Wooden Rib Figure 2 Wing cross section ribs glued slots cut balsa piece back side spar Note foam piastic leading edge outside mold formed around plug same size finished tail boom surface plug must perfectly smooth free blemishes Alexey makes outer mold first placing protective sheath can use same plastic film material used cover Combat models plug prevent fiberglass mold material sticking applies several layers fiberglass epoxy resin has cured removes plug As shown photo plug has handle molded its large end makes easy Carbon Fiber ThreadsFront Part Aluminum Alloy - Balsa 3 Junction Wing Spars Figure 3 Wing spar joiner rod dihe dral has cut aluminum alloy plate sandwiched between two pieces balsa right assembly shaped isa close fit inside di ameter hollow wing spars left diameter 056 tapers 02 finished weight 049 oz cross section sketch tail boom included new tail boom removed mold should have mirrorlike surface cant achieve conventional building techniques such merely covering plug aluminum carbon fiber letting cure open air must cut aluminum sheets extreme precision order get invisible full-length seam particularly careful outer sheet youve done everything properly will get Balsa RibCarbon Fiber Carbon Fiber / Trailing Edge Fig 4 Cut Stabilizer pull out fiberglass female mold have just made inside female mold will have perfectly smooth surface make tail boom itself first take two thin sheets tempered aluminum foil special materialnot kind Americans use wrap food sandwich two pieces carbon fiber cloth between aluminum carbon fiber pieces must cut very Keviar Threads lsa Sheets Aluminum Alloy Sheet B Technology Making Front Part Stab Figure 4 Cross section stabilizer leading edge B lamination 012 alumInum alloy two sheets 032 balsa Keviar threads inserted chink left between edges balsa sheets aluminum/balsa laminate bent glued place 76 Model Aviation very strong tail boom wonderfully shiny surface just like Alexeys wing spars made same way except three layers carbon fiber cloth root end layer tip end further difference spar has constant outside diameter Alexeys spars weigh 042 oz direction weave layers carbon fiber cloth critical can cross depending whats easiest Alexey uses carbon fiber trailing edges wings puts six layers carbon fiber cloth really flat surface saturates epoxy resin desired thickness 0032 applies pressure top epoxy cures uses diamond-coated cutting disk slice cured sheet strips 008 wide may seem like lot work resulting trailing edge lighter made wood will never warp wing ribs also made very clever way Make metal templates root tip ribs glue opposite sides wooden block Use lightweight hardwood balsa Use templates carve block wood sand smooth Remove templates Glue layer carbon fiber cloth around wood block sides corresponding upper lower surfaces airfoil Use epoxy resin adhere cloth put vacuum bag over cures necessary attach cloth firmly smoothly wood block epoxy has cured cut slot trailing edge portion block carbon fiber trailing edge piece made little earlier take diamond-edged saw slice block individual ribs 004 thick Two such sets ribs shown another photos wing leading edge sheeting made much same way tail boom spars However layer carbon fiber cloth used between two layers PPM. DOES ThE WOEK MANY ADHESIVES Use Ira Thread Lock BetterThan SiHccee AId Sties 1/4 Tire lime Seger C/As Attactring Coosples AS FresOc Rhergiaso Ports Totatly Clear Simple Use Org Fart So Mairgl Holds Casoples AllY Motafol Ireuding Plasoc CoveCogs Plo Pegging Clear Forts Holds Firnealls Fiberglass Moves Servos Mounted Arlynlirere WIhout Fear Totally Remostrie WUirost Ceasing Sanrege PPM. available go hobby retailer coil Innovative Model Products Toll Frgg 800 780-3190 10001368-3190 Dealer Inquirigs Wontgd lAdd $250 SaHI aluminum sheeting sketches shows Alexey makes leading edge Note based contoured piece foam plastic would take separate article tell make foam plastic part process widely used United States making wings CL Combat RC Pattern planes can find articles books magazines describing foam leading edge glued spars balsa piece added back side spar Vertical slots ribs cut balsa ribs glued Everything glued epoxy Alexey makes wing root ribs fiberglass durability root ribs can seen photograph Alexey holding two wing panels wing covered plastic film tautened hot iron heat gun Alexey covers tissue paper paints glues thick cotton thread turbulator strip upper side wing shown sketch PPM.USED BY IRE PIOS Col Art Jolmoon See SC ModeierApll iS ogre Sernon Tattee MasteO Winier Aird US Scale Team POOR Super lEdOor Scale lhV Modeler Frank Costello COluerrrltt Flying Modelal 0mg Homey Soutreasnem fontilbeter Scale R Modeler Matters Coorpetooll Mitre Mat Saper Stsr Helicopter PIlot PO Boa 4366Ales eneeeble Pm Margete FL 33063Hobby Lobby $995 may wondering Alexey gets dihedral wing panels type wing look Figure 3 will answer question Alexey makes spar joiner urodr built-in dihedral sandwiches aluminum alloy plate correct dihedral angle cut Continued page 78 ADAPTOR ThROW-A-WAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & II~jK O TO 5/32CAPIONALL DREMEL POWER TOOLS RUNS 100% TRUE & CONCENTRIC AT FULL RPM ESS CHUCK $1895 DHMEL 850395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCK3 STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUTTING PLASliC WOOD SOFT METALS LEXAN PLEXIGLASS & ETC AVAILABLE IN 006 008 010 012 014 016 018 020 023 025 028 032 ThICKNESS 1 IDE DIAMETER @ $675 EA NO 502ARBOR$800 NO 5031 4 X 114 SAWS $600 OUR SAWS ONLY WORK WITH OUR ARBOR MICRO SELPSTARTlNG TORCH MT775 Blow Torch ncr SI buienni MT771 gataee 5 EASTERN TOOL & SUPPLY CO 149 GRAND ST- NYC NY 10013 WRITE FOR CATALOG$300ORDERS 212-925-1006 WHEN ORDERING PPD ADD $300OFFICE 212-226-3749 CODADD$500FAX212-925-1010 No need flint matches Just press lire Piezo Sell-Starting button lot micro size adlust able lame barns 2370 ap 3 hours Operates standard cigarette lighter butane refillable Tank fits comfortably tire palm hand made hi5himpact rubber airows safe non slip comforlable grip Supplied can butane $3hSO SeoO August 1991 77 WIRE BENDERS No 322 No 323 K&S ENGINEERING 6917 W 59th St Chicago IL 60638 312 586-8503 SEND 50 FOR PRICE LIST AND CATALOG No324 INNOVATIVE MODEL PRODUCTS INC BRINGS YOU. uuuy SUPER STRONGmrtenoee PFMe Unee-Henreble end SUPER FLEXABLEFIVIT-- SUPER FASTage GRIPS TIGHT WHERE OTHERS OONT REMOVABLE WITHOUT TRACE SUPER ADHESIVE BIG37oz TUBE between two pieces balsa Finally whole assembly shaped closely matches inside diameter hollow wing spars trailing edges wing panels held position short length wire glued wing rib wire will stay put better its wrapped few layers cotton thread before being epoxied place wire slips metal tube fuselage Glider last thing Alexey explained builds stabilizer exception leading edge construction similar used wing ribs 0024-in-thick balsa carbon fiber trailing edge 002 thick 004 wide leading edge formed sheet 0012 aluminum alloy two sheets 0032 balsa laid flat true surface balsa adhered aluminum epoxy epoxy cured under pressure high temperature leaves little chink between edges balsa sheets epoxy has cured puts about 20 threads Kevlar chink bends aluminum balsa laminate around leading edge stab glues place uses plastic film covering Gliders fin balsa fiberglass plate glued top covered same way wings Alexey builds fuselage wood covers fiberglass future however intends use same methods described wing stabilizer leading edges way hell get better surface finish Alexeys construction techniques encompass fine points can described article length models use innovative methods throughout course Alexeys finished yet knows may discover totally new way building Free Flight models hope hell agree tell us about RC Pylon Racing/Hager Continued page 71 official no event should re-fly granted contestant has problem equipment Ready Area addition aircraft starting line aircraft should called back-up ready line front registration desk ready line should course between No 2 No 3 pylons see safety section Pit Boss pit boss could also transmitter impound boss impound ready areas adjacent should get heat cards registration desk using PA system call contestants heat back-up line contestant will called again heat moves ready line responsibility contestant ready line time heat moves starting line An efficient contest will turn around heats six minutes less start start next back-up line pit boss should inform contestant starting position heat moves starting line pit boss should see heat cards get starting line correct sequence Either pit boss some other contest official should notify starter either through intercom waving black flag aircraft flies over pit spectator area Flight Recorder flight recorder will have heat cards heat starting line will confirm contestants correct starting order recommended flight recorder have watch time first place finisher Near end race should help starter ascertain order finish As aircraft cross finish line flight Continued page 82 THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great performance Thermal Charger Wing Span Wing Area Motor Included 60 Inches 545 Sq Inches Leisure 05 Electric %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 78 Model Aviation AIR WOLF EPOXY FIBERGLASS FUSELAGES TAKES MOST 50-60 MECHANICS OTHER MODELS AVAILABLE LARRY JOLLY MODEL PRODUCTS $21000 5501 WCOMO SANTA ANA CALIFORNIA 92703 714 826-6861