FREE FLIGHT DURATION I IWLkA [ FOR ALMOST two decades aluminumskinned balsa has dominant wing construction method FiC Power models first use can document Soviet flier Eugene Verbitsky 1977 World Championships Denmark Actually models proxy-flown Igor Ziljberg literally snake-bit Eugene least other Soviet modeler Sergey Sharron also aluminum-foil-covered wings dont believe first use aluminum Back early 1960s remember seeing Wakefield late Jim Patterson used thin aluminum covering over solid balsa wing aluminum used wings isnt same stuff wrap turkey Thanksgiving Rather very hard very thin 009-013 inch material feels about stiff manila folder Rumors abound source real use stuff Some sald developed Soviets covering fullscale helicopter blades Others said actually made country available folks behind hon Curtain Buying roll Russian aluminum could take aspects James Bond movie Norm Byrds tales late Tom McLaughlans efforts 1987 World Champs involved whispered conversations Port-O-Let midnight meetings other cloak-and-dagger routines After fall Berlin Wall aluminum became much easier find although never became hobby shop staple tried found could yield stronger stiffer wing less trouble previous methods such fiberglass cloth over sheeted wing Without going great detail heres typical aluminum wing built top bottom sheeting usually 1As 1/20 balsa glued up cut size aluminum cut slightly longer wing panel little double chord width aluminum taped piece glass carefully cleaned process usually involved rinsing wiping various degreasers solvents assure good bond epoxy thin layer epoxy applied aluminum balsa sheeting positioned aluminum slight gap between leading edge upper lower sheets aluminum-covered balsa moved undercamber form fulldepth spar ribs added top sheeting pulled down complete panel much detailed explanation construction process see Randy Archers article Aluminum Skin Wings 1988 NFFS Sympo Thats No finish no fuel proofingjust wonderful shiny wing looked like milled solid block aluminum aluminum wings werent perfect Like type sheeted wing weight distribution more-or-less uniform over entire wing unless careful balsa selection epoxy application weight could excessive inevitable dings punctures hard patch wings broke really broke Since strength dependent aluminum crash wrinkled aluminum pretty much did wing During last few years more FiC fliers have taking careful look carbon-fiber D-box construction has become almost universal other two international events FlA glider FiB Wakefield rubber carbon D-box construction provides high stiffness light weight importantly survivability can carbon wings take February 1997 123 Sleek cowl hides rear-exhaust Rex 06 Alex Maximovs F1J Timer based familiar Leica camera self-timer David Hallidays FiCs feature carbon D-boxes wing stabthis gradually replacing aluminum-skin wing structure Tapered wing wires $10 stab rudder fittings bunt VIT $50 available Maximovs model abuse also can easily repaired carbon D-box wing Consists fulldepth spar carry bending loads molded carbon fiber cloth D-box shell carry torsional loads minimal aft rib trailing edge doesnt much anything structurally typical spar would consist top bottom pieces cut carbon-fiber sheet solid balsa webbing between Kevlar thread wrapping holds together D-box shell typically consists two layers carbon fiber cloth arranged weave 450 maximum torsional strength usually molded over male form using vacuum bag hold everything place epoxy sets Full-depth front ribs fairly closely spaced attached spar Canadians call subassembly fish bone D-box shell epoxied result very stiff D-box Aft ribs carbon trailing edge added Thin carbon-fiber capstrips added top bottom ribs extending forward slightly over D-box lock everything place Since wing inherently strong sort plastic covering can used used building classic balsa-and-tissue method may seem terribly difficult complicated nothing could farther truth Carbon fiber easy work consistent weight always straight Vacuum-bagging simple equipment supplies readily available several mail-order sources Although havent articles specifically geared FiC construction plenty good technical information basics Fl wing construction Aram Schlosbergs Notes High-Tech Wing Construction 1995 Sympo covers wide range techniques Quicker Composite Structures Chris Edge Mike Fantham offers specific tips can found 1995 Free Flight Forum produced British Model Flying Association National Free flight Societys publications director Fred Terzian 4858 Moorpark Ave San Jose CA 95 129-2132 can supply both publications Drop Fred stamped self-addressed envelope list publications available NFFS sounds too complicated might consider ordering set ready-made wings W-Hobby latest catalog lists 2295 mm 903 inch carbon D-box wing airfoil Verbitsky 87 finished weight listed 200 g information write W-Hobby Vidas Nikolajevas Vilniaus 237-24 5400 Siauliai Lithuania Include couple international reply coupons available local post office Maximov F1J new methods construction also being carried over increasingly-popular FlJ event Basically event Half-A version FiC flown two minute maxes Without wing-area requirements larger models designers free try variety approaches simple complex Ukrainian modeler Alex Maximov great name Free Fighter has opted go way scaled-down FiC model cowled engine auto stab auto rudder bunt model spans 1724 mm t 68 inches wing area about 330 square inches All-up weight about 420 grams about 145 ounces wing stab use carbon D-boxes tailboom also carbon Power Rex 06 reportedly turns 28000 rpm 145 x 75mm about 57 x 3 inches carbon two-bladed folding prop Alex selling FlJ components finished models through Jos Melis ABC Free flight Supplies Belgium Available components include D-box shells $40 carbon tailboom $20 engine pan filling valve $60 folding prop $50 engine $150 complete model ready fly goes $700 Remember no builder-ofthe-model rule FM events Parts prices include shipping will add another 15% Shipping finished model about $100 can find out writing Jos Melis Winterbeekstraat 1 3730 Hoeselt Belgium couple international reply coupons would appreciated Im sure X06 o . R PROP 2LAD 145mm DiM 75mm pITCH c fLEX MAXIMOV UKRAINE 0 II ___________ I 0 RUBBER 1NN r U AFudCT \ TAIL BOOM CRON 650 22 -I-T -1 --4--2-1 IWiNG SCTIONOWN cZIIZII~ FIN sari- BALSA rzrzZZZZr~ TAIL sCTiOPd Th H _ Alex Maximoys F1J borrows heavily current FiC practice Removable pan allows easy access engine tank 124 Model Aviation
Edition: Model Aviation - 1997/02
Page Numbers: 123, 124
Edition: Model Aviation - 1997/02
Page Numbers: 123, 124
FREE FLIGHT DURATION I IWLkA [ FOR ALMOST two decades aluminumskinned balsa has dominant wing construction method FiC Power models first use can document Soviet flier Eugene Verbitsky 1977 World Championships Denmark Actually models proxy-flown Igor Ziljberg literally snake-bit Eugene least other Soviet modeler Sergey Sharron also aluminum-foil-covered wings dont believe first use aluminum Back early 1960s remember seeing Wakefield late Jim Patterson used thin aluminum covering over solid balsa wing aluminum used wings isnt same stuff wrap turkey Thanksgiving Rather very hard very thin 009-013 inch material feels about stiff manila folder Rumors abound source real use stuff Some sald developed Soviets covering fullscale helicopter blades Others said actually made country available folks behind hon Curtain Buying roll Russian aluminum could take aspects James Bond movie Norm Byrds tales late Tom McLaughlans efforts 1987 World Champs involved whispered conversations Port-O-Let midnight meetings other cloak-and-dagger routines After fall Berlin Wall aluminum became much easier find although never became hobby shop staple tried found could yield stronger stiffer wing less trouble previous methods such fiberglass cloth over sheeted wing Without going great detail heres typical aluminum wing built top bottom sheeting usually 1As 1/20 balsa glued up cut size aluminum cut slightly longer wing panel little double chord width aluminum taped piece glass carefully cleaned process usually involved rinsing wiping various degreasers solvents assure good bond epoxy thin layer epoxy applied aluminum balsa sheeting positioned aluminum slight gap between leading edge upper lower sheets aluminum-covered balsa moved undercamber form fulldepth spar ribs added top sheeting pulled down complete panel much detailed explanation construction process see Randy Archers article Aluminum Skin Wings 1988 NFFS Sympo Thats No finish no fuel proofingjust wonderful shiny wing looked like milled solid block aluminum aluminum wings werent perfect Like type sheeted wing weight distribution more-or-less uniform over entire wing unless careful balsa selection epoxy application weight could excessive inevitable dings punctures hard patch wings broke really broke Since strength dependent aluminum crash wrinkled aluminum pretty much did wing During last few years more FiC fliers have taking careful look carbon-fiber D-box construction has become almost universal other two international events FlA glider FiB Wakefield rubber carbon D-box construction provides high stiffness light weight importantly survivability can carbon wings take February 1997 123 Sleek cowl hides rear-exhaust Rex 06 Alex Maximovs F1J Timer based familiar Leica camera self-timer David Hallidays FiCs feature carbon D-boxes wing stabthis gradually replacing aluminum-skin wing structure Tapered wing wires $10 stab rudder fittings bunt VIT $50 available Maximovs model abuse also can easily repaired carbon D-box wing Consists fulldepth spar carry bending loads molded carbon fiber cloth D-box shell carry torsional loads minimal aft rib trailing edge doesnt much anything structurally typical spar would consist top bottom pieces cut carbon-fiber sheet solid balsa webbing between Kevlar thread wrapping holds together D-box shell typically consists two layers carbon fiber cloth arranged weave 450 maximum torsional strength usually molded over male form using vacuum bag hold everything place epoxy sets Full-depth front ribs fairly closely spaced attached spar Canadians call subassembly fish bone D-box shell epoxied result very stiff D-box Aft ribs carbon trailing edge added Thin carbon-fiber capstrips added top bottom ribs extending forward slightly over D-box lock everything place Since wing inherently strong sort plastic covering can used used building classic balsa-and-tissue method may seem terribly difficult complicated nothing could farther truth Carbon fiber easy work consistent weight always straight Vacuum-bagging simple equipment supplies readily available several mail-order sources Although havent articles specifically geared FiC construction plenty good technical information basics Fl wing construction Aram Schlosbergs Notes High-Tech Wing Construction 1995 Sympo covers wide range techniques Quicker Composite Structures Chris Edge Mike Fantham offers specific tips can found 1995 Free Flight Forum produced British Model Flying Association National Free flight Societys publications director Fred Terzian 4858 Moorpark Ave San Jose CA 95 129-2132 can supply both publications Drop Fred stamped self-addressed envelope list publications available NFFS sounds too complicated might consider ordering set ready-made wings W-Hobby latest catalog lists 2295 mm 903 inch carbon D-box wing airfoil Verbitsky 87 finished weight listed 200 g information write W-Hobby Vidas Nikolajevas Vilniaus 237-24 5400 Siauliai Lithuania Include couple international reply coupons available local post office Maximov F1J new methods construction also being carried over increasingly-popular FlJ event Basically event Half-A version FiC flown two minute maxes Without wing-area requirements larger models designers free try variety approaches simple complex Ukrainian modeler Alex Maximov great name Free Fighter has opted go way scaled-down FiC model cowled engine auto stab auto rudder bunt model spans 1724 mm t 68 inches wing area about 330 square inches All-up weight about 420 grams about 145 ounces wing stab use carbon D-boxes tailboom also carbon Power Rex 06 reportedly turns 28000 rpm 145 x 75mm about 57 x 3 inches carbon two-bladed folding prop Alex selling FlJ components finished models through Jos Melis ABC Free flight Supplies Belgium Available components include D-box shells $40 carbon tailboom $20 engine pan filling valve $60 folding prop $50 engine $150 complete model ready fly goes $700 Remember no builder-ofthe-model rule FM events Parts prices include shipping will add another 15% Shipping finished model about $100 can find out writing Jos Melis Winterbeekstraat 1 3730 Hoeselt Belgium couple international reply coupons would appreciated Im sure X06 o . R PROP 2LAD 145mm DiM 75mm pITCH c fLEX MAXIMOV UKRAINE 0 II ___________ I 0 RUBBER 1NN r U AFudCT \ TAIL BOOM CRON 650 22 -I-T -1 --4--2-1 IWiNG SCTIONOWN cZIIZII~ FIN sari- BALSA rzrzZZZZr~ TAIL sCTiOPd Th H _ Alex Maximoys F1J borrows heavily current FiC practice Removable pan allows easy access engine tank 124 Model Aviation
