FREE FLIGHT DURATION COVERING CONFUSION Back 1950s simple just two choicesJapanese tissue silkspan Sure some folks used silk really soaked up dope color options silkspan limited white red yellow So time used tissue light lots colors nickel sheet along came plastic wraps literally after few tries mid 1950s decided plastic wraps better left leftovers made-for-models plastic films developed too heavy did try some clear Micafilm few years back weight wasnt bad didnt give wing same stiffness good old tissue-and-dope did What changed opinion plastics wasnt plastic coverings themselves new composite structures First Kevlar now carbon-fiber D-box construction creates wing very rigid doesnt need tissue give torsional strength needs something light cover spaces between ribs has led lot other folks re-think plastic film coverings Heres quick rundown options Clear mylar available both quarterand half-mil thicknesses incredibly cheap light use quarter-mil stabs just leave clear can dye Rit dye havent taken trouble yet understand some Russian glider fliers use half-mil mylar wings double-cover Japanese tissue color slightly rougher surface feel helps glide About problem using clear mylar especially thinner stuff mess handle Ive good luck taping piece frame covering much same way Indoor modelers cover microfilm bit misnomer film translucent white random fiber texture reminiscent silkspan covering followed suggestions Jim Parkers excellent series glider construction ran NFFS Digest last year Jims suggestion covered bottom wing first used thin CyA applied inside assure permanent bond undercambered ribs trailing edge lapped film up over top especially important using carbon-fiber trailing edge just isnt much gluing surface Covering went quickly no wait watershrinking doping wings looked rather bland doped some tissue numbers few large panels colored tissue just applied clear dope outline attached tissue smoothly possible watershrunk tissue coat clear finished up Total weight gain 162 square decameter wing about 250 square inches slightly less 11 grams including tissue decoration Another way add color clear Micafilm felt-tipped marker can use marker directly dull side film break open marker use entire piece felt Some colors such yellow highlighter go very evenly red tried streaked badly however Black didnt seem very dense mentioned Walt Rozelle using Micafilm FlJ model Walt said has good luck using black felt marker inside dull side film covering model coloring outer smooth side well dont know marker fuelproof Walt used tips shouldnt too much problem Like lighter plastic films mylar has no adhesive backing course saves considerable weight does require using heat-sensitive adhesive models frameworkThere seem about favorite formulae adhesives people using plastic film Ive good luck using Sig Stix-It straight out can important thing use little possible minimize creep cover rectangular stabs piece running film around trailing edge Shrink bottom first hold stab down shrink top dont overdo model thousand feet up thermal few small wrinkles wont matter last couple wings Ive used clear Micafilm Coverite name Aside ease covering puncture resistance plastic films waterproof models first outing damp foggy morning noticed plastic films wing stab drum tight looking better tissue World Championships last year quite few Europeans using white polyester covering called Polyspan supplied Austrian Klaus Salzer looks lot like silkspanThe material attached clear dope much like tissue couple coats 50-50 clear dope brushed fill pores hot iron can used remove wrinkles shrunk tight water Weight about 10% tissue polyester much puncture-resistant color polyester can dyed virtually no weight gain Arizona importer Sal Fuciano handling Polyspan 195- inch-wide 12-foot roll sells $15 plus postage Sal also has analine dye red yellow blue orange black $550 per three-ounce bottle address Starline 6146 East Cactus Wren Rd Scottsdale AZ 85253 Tel 602 948-5798 DPR Part DPR stands Delayed Prop Release Basically throw rubber-powered model straight up hard can timer releases propeller models continues its climb idea has around least two decades have seen American Ed Turner using World Champs looked like least half field using 96 Model Aviation span shown Alexander Andriukovs winning FiB durable though somewhat drab wing covering Igor Vivchar waits good air DPR front end uses simple external lever keep blades turning some sort DPR witnessed failure During three-minute rounds Ukrainians believe Eugeny Gorban stretched delay out little too long model stalled dropped its nose just missed ground climbed easy max did notice few other very short scores some other fliers may have couple DPR failures missed Europeans seemed like normal logical way launch rubber model no fumbling prop no wasted turns getting left hand Out way Just throw model very very hardstraight upand watch go Theres good bit discussion country about amount altitude gained using DPR theoreticians say gain minimal people actually using DPR getting models considerably higher models DPR DPR part approach puts very heavy emphasis getting model high possible means very clean low-drag model VIT variable incidence tailplane either threeposition auto-rudder wing wiggler assure very straight shall say ballistic climb conventional locked-up model would benefit little DPR Although DPR mechanisms can very sophisticated really dont need thats necessary lever noseblock will engage prop arms keep turning line back timer released /2 second after launch prop blades fold back under wing some sort latch mechanism needed keep blades forward launch dont foul wing prop starts turning can simple spring holds blade back slight angle blades begin turn centrifugal force releases spring blade pivots forward run position complicated mechanism within hub can hold blades out feathered during launch Until recently commercially-available DPR hubs rather hard come About way get head Europe buy one Soviet modelers breakup Soviet Union rush capitalism sophisticated DPR front ends much easier get Several importers such Sal Fruciano Starline handling various DPR front ends DPR front ends fall two broad categories external internal feathering extdrnal feathering types have fixed wire prop hangers spring hanger wire moves blade feathered full pitch blades begin turn internal feathering types use rotating wire hangers internal springs result cleaner front end thats usually bit lighter less prone damage crash way DPR system starts also falls two broad types uses very simple external lever mounted nose ring line wire back timer holds lever out against either blade wires small pin back spinner second type utilizes internal lever within noseblock stiff wire A6 inch runs timer forward small hole back noseblock pushes against lever turn engages slot spinner backplate wire released timer lever moves rear prop starts turning use commerciallyavailable DPR front ends setting up model DPR much complicated rigging floodoff system power model operative word though system aspect model design construction flying must done DPR mind timer start switch must work time rubber must selected stranded wound take advantage launch launch must hard accurate since model will climbing fast wings must stiff enough prevent flutter worth trouble Well ask winner last two World Championships DPR just high-tech Wakefields Several British modelers use DPR coupes Ill covering various aspects DPR next few columns need plunge ahead read next two items Cyclon Front Ends Mike Mulligan sent several sample FlB front ends Russia Cyclon units Mike will handling simple Montreal stop unit $40 feathering DPR unit $80 variablepitch DPR unit $120 Since three units share some features Ill discuss first feature red anodized aluminum finish use removable U-shaped rubber hook Also included T-shaped fitting allows fit regular winder rubber hook units feature 326mm 1 inch outside diameter 25mm inside diameter noseblock spinner backplate three units appear same basic pieces further machining needed add various DPR VP functions Theres good bit interchangeability among three units including prop shafts blade mounting arms three units use double ball bearings support prop shaft removable blade mounting arms can easily adjusted field exact pitch Montreal unit light 27g August1994 97 Russian Cyclon DPR front end uses internal springs rotate blade mounting arms feathered position launch blades stay out feathered reduced drag After 1/ second lever released model climbs away External springs mounting arms rotate blades desired pitch after internal pawl released wire timer simple would good choice first Wakefield DPR unit few grams heavier 31 g feathering mechanism internal start lever Like DPR units incorporates ratchet start lever allows add hand winds waiting big thermal VP unit weighs 35g weights 1 5g rubber hook Like complex expensive $300 Andriukov VP front end Cyclon uses torque-actuated cam vary propeller pitch during flight changing high low torque drops off cam Cyclon unit rather cleverly hidden inside cast carbon-fiber spinner However unlike Andriukov unit Cyclon does use ball-bearing cam followers ball-bearing mounts rotating blade arms Mike also has some Kevlar motor tubes formed balsa blades Since shipments Russia can problematic best write call Mike first see what has stock address Mike Mulligan 511 No Pageant #B Orange CA 92669 Tel 714 633-9282 Wakefield An Intermediate Text year ago mentioned Ron Felix importing some specialty Wakefield items Russia catalog business has prompted questions about what exotic bits pieces Ron has put together 44-page book building high-tech Wakefields text covers everything design through construction Although some references specific items catalog information would great benefit anyone getting ready try FlB lot basic information have seen anywhere else including install auto surface lines installing timers ready-made carbon fiber pylons construction wings stabs rudders good bit discussion trimming VIT model well rubber motor makeup Also included threeviews five state-of-the-art Wakes about best five bucks could spend serious about FiB address Ron Felix P 0 Box 74 Solebury PA 18963 just getting Wakefield first time Ron has also produced beginners text isalso$5 odel Aviation PTOR THROW AWAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & KEYLESS CHUCK OTO 5132 CAP ON ALL EgPOWER TOOLS INCLUDING [IMITE& EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULL REM NO 501 ADAPTOR ESS CHUCK $1895 800 395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUlliNG PLASTIC WOOD SOFT METAIS LEXAN PLEXIGLASS & ETC AILASLE IN 006008 010 012 014 016 019 025023025 028 032 ThICKNESS P OUTSIDE DLAAIETER @ $675 EA O 502ARBOR$600 503 14X 1/4 SA W $600 OUR SAWS ONLY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL GRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1I2 AB2 100 3AB5 1 50 2ABS 100 ARBOR 503600 SAWS AND CUT-OFF BLADES ONLY WORK WITH OUR ARBOR NO NEED FOR FLINT OR MATCHES MICRO 5fy JUST PRESS THE PIEZO SELF-STARTING SELF BUlTON FOR MICRO SIZE ADJUSTABLE II FLAME THAT BURNS AT 2370 FOR UP TC STARTING 3 HOURS OPERATES ON STANDARD CIGARETTE LIGHTER BUTANE AND IS TORCHREFILLABLE TANK FITS COMFORTABLY -IN THE PALM OF YOUR HAND AND IS MT77O - MADE OF HIGH IMPACT RUBBER WHICH Blow Torch ALLOWS FOR SAFE NON-SLIP GRIP wIth n ci bctan $3500 SUFFUED WITH CAN OF BUTANE BuIanc5oSe00WFORw PAfN ORDERING- FF0000 $300 EASTERN TOOL&SUPPLYCOC0DAOOSYSO 149 GRAND ST- NYC. NY 10013OFFICE 210-001-314B CATALOG FREE WITH ORDERFP01085-ISO YES THE TWIN-AIR 20 IS HERE AT LAST YES THE TWiN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUAUTY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATIC CAPABIU TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEAST AERODYNAMICS INCA 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length 43 Fuselage Width 35 Overall Weight Range -55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Ask local hobby shop OT order direct
Edition: Model Aviation - 1994/08
Page Numbers: 96, 97, 98
FREE FLIGHT DURATION COVERING CONFUSION Back 1950s simple just two choicesJapanese tissue silkspan Sure some folks used silk really soaked up dope color options silkspan limited white red yellow So time used tissue light lots colors nickel sheet along came plastic wraps literally after few tries mid 1950s decided plastic wraps better left leftovers made-for-models plastic films developed too heavy did try some clear Micafilm few years back weight wasnt bad didnt give wing same stiffness good old tissue-and-dope did What changed opinion plastics wasnt plastic coverings themselves new composite structures First Kevlar now carbon-fiber D-box construction creates wing very rigid doesnt need tissue give torsional strength needs something light cover spaces between ribs has led lot other folks re-think plastic film coverings Heres quick rundown options Clear mylar available both quarterand half-mil thicknesses incredibly cheap light use quarter-mil stabs just leave clear can dye Rit dye havent taken trouble yet understand some Russian glider fliers use half-mil mylar wings double-cover Japanese tissue color slightly rougher surface feel helps glide About problem using clear mylar especially thinner stuff mess handle Ive good luck taping piece frame covering much same way Indoor modelers cover microfilm bit misnomer film translucent white random fiber texture reminiscent silkspan covering followed suggestions Jim Parkers excellent series glider construction ran NFFS Digest last year Jims suggestion covered bottom wing first used thin CyA applied inside assure permanent bond undercambered ribs trailing edge lapped film up over top especially important using carbon-fiber trailing edge just isnt much gluing surface Covering went quickly no wait watershrinking doping wings looked rather bland doped some tissue numbers few large panels colored tissue just applied clear dope outline attached tissue smoothly possible watershrunk tissue coat clear finished up Total weight gain 162 square decameter wing about 250 square inches slightly less 11 grams including tissue decoration Another way add color clear Micafilm felt-tipped marker can use marker directly dull side film break open marker use entire piece felt Some colors such yellow highlighter go very evenly red tried streaked badly however Black didnt seem very dense mentioned Walt Rozelle using Micafilm FlJ model Walt said has good luck using black felt marker inside dull side film covering model coloring outer smooth side well dont know marker fuelproof Walt used tips shouldnt too much problem Like lighter plastic films mylar has no adhesive backing course saves considerable weight does require using heat-sensitive adhesive models frameworkThere seem about favorite formulae adhesives people using plastic film Ive good luck using Sig Stix-It straight out can important thing use little possible minimize creep cover rectangular stabs piece running film around trailing edge Shrink bottom first hold stab down shrink top dont overdo model thousand feet up thermal few small wrinkles wont matter last couple wings Ive used clear Micafilm Coverite name Aside ease covering puncture resistance plastic films waterproof models first outing damp foggy morning noticed plastic films wing stab drum tight looking better tissue World Championships last year quite few Europeans using white polyester covering called Polyspan supplied Austrian Klaus Salzer looks lot like silkspanThe material attached clear dope much like tissue couple coats 50-50 clear dope brushed fill pores hot iron can used remove wrinkles shrunk tight water Weight about 10% tissue polyester much puncture-resistant color polyester can dyed virtually no weight gain Arizona importer Sal Fuciano handling Polyspan 195- inch-wide 12-foot roll sells $15 plus postage Sal also has analine dye red yellow blue orange black $550 per three-ounce bottle address Starline 6146 East Cactus Wren Rd Scottsdale AZ 85253 Tel 602 948-5798 DPR Part DPR stands Delayed Prop Release Basically throw rubber-powered model straight up hard can timer releases propeller models continues its climb idea has around least two decades have seen American Ed Turner using World Champs looked like least half field using 96 Model Aviation span shown Alexander Andriukovs winning FiB durable though somewhat drab wing covering Igor Vivchar waits good air DPR front end uses simple external lever keep blades turning some sort DPR witnessed failure During three-minute rounds Ukrainians believe Eugeny Gorban stretched delay out little too long model stalled dropped its nose just missed ground climbed easy max did notice few other very short scores some other fliers may have couple DPR failures missed Europeans seemed like normal logical way launch rubber model no fumbling prop no wasted turns getting left hand Out way Just throw model very very hardstraight upand watch go Theres good bit discussion country about amount altitude gained using DPR theoreticians say gain minimal people actually using DPR getting models considerably higher models DPR DPR part approach puts very heavy emphasis getting model high possible means very clean low-drag model VIT variable incidence tailplane either threeposition auto-rudder wing wiggler assure very straight shall say ballistic climb conventional locked-up model would benefit little DPR Although DPR mechanisms can very sophisticated really dont need thats necessary lever noseblock will engage prop arms keep turning line back timer released /2 second after launch prop blades fold back under wing some sort latch mechanism needed keep blades forward launch dont foul wing prop starts turning can simple spring holds blade back slight angle blades begin turn centrifugal force releases spring blade pivots forward run position complicated mechanism within hub can hold blades out feathered during launch Until recently commercially-available DPR hubs rather hard come About way get head Europe buy one Soviet modelers breakup Soviet Union rush capitalism sophisticated DPR front ends much easier get Several importers such Sal Fruciano Starline handling various DPR front ends DPR front ends fall two broad categories external internal feathering extdrnal feathering types have fixed wire prop hangers spring hanger wire moves blade feathered full pitch blades begin turn internal feathering types use rotating wire hangers internal springs result cleaner front end thats usually bit lighter less prone damage crash way DPR system starts also falls two broad types uses very simple external lever mounted nose ring line wire back timer holds lever out against either blade wires small pin back spinner second type utilizes internal lever within noseblock stiff wire A6 inch runs timer forward small hole back noseblock pushes against lever turn engages slot spinner backplate wire released timer lever moves rear prop starts turning use commerciallyavailable DPR front ends setting up model DPR much complicated rigging floodoff system power model operative word though system aspect model design construction flying must done DPR mind timer start switch must work time rubber must selected stranded wound take advantage launch launch must hard accurate since model will climbing fast wings must stiff enough prevent flutter worth trouble Well ask winner last two World Championships DPR just high-tech Wakefields Several British modelers use DPR coupes Ill covering various aspects DPR next few columns need plunge ahead read next two items Cyclon Front Ends Mike Mulligan sent several sample FlB front ends Russia Cyclon units Mike will handling simple Montreal stop unit $40 feathering DPR unit $80 variablepitch DPR unit $120 Since three units share some features Ill discuss first feature red anodized aluminum finish use removable U-shaped rubber hook Also included T-shaped fitting allows fit regular winder rubber hook units feature 326mm 1 inch outside diameter 25mm inside diameter noseblock spinner backplate three units appear same basic pieces further machining needed add various DPR VP functions Theres good bit interchangeability among three units including prop shafts blade mounting arms three units use double ball bearings support prop shaft removable blade mounting arms can easily adjusted field exact pitch Montreal unit light 27g August1994 97 Russian Cyclon DPR front end uses internal springs rotate blade mounting arms feathered position launch blades stay out feathered reduced drag After 1/ second lever released model climbs away External springs mounting arms rotate blades desired pitch after internal pawl released wire timer simple would good choice first Wakefield DPR unit few grams heavier 31 g feathering mechanism internal start lever Like DPR units incorporates ratchet start lever allows add hand winds waiting big thermal VP unit weighs 35g weights 1 5g rubber hook Like complex expensive $300 Andriukov VP front end Cyclon uses torque-actuated cam vary propeller pitch during flight changing high low torque drops off cam Cyclon unit rather cleverly hidden inside cast carbon-fiber spinner However unlike Andriukov unit Cyclon does use ball-bearing cam followers ball-bearing mounts rotating blade arms Mike also has some Kevlar motor tubes formed balsa blades Since shipments Russia can problematic best write call Mike first see what has stock address Mike Mulligan 511 No Pageant #B Orange CA 92669 Tel 714 633-9282 Wakefield An Intermediate Text year ago mentioned Ron Felix importing some specialty Wakefield items Russia catalog business has prompted questions about what exotic bits pieces Ron has put together 44-page book building high-tech Wakefields text covers everything design through construction Although some references specific items catalog information would great benefit anyone getting ready try FlB lot basic information have seen anywhere else including install auto surface lines installing timers ready-made carbon fiber pylons construction wings stabs rudders good bit discussion trimming VIT model well rubber motor makeup Also included threeviews five state-of-the-art Wakes about best five bucks could spend serious about FiB address Ron Felix P 0 Box 74 Solebury PA 18963 just getting Wakefield first time Ron has also produced beginners text isalso$5 odel Aviation PTOR THROW AWAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & KEYLESS CHUCK OTO 5132 CAP ON ALL EgPOWER TOOLS INCLUDING [IMITE& EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULL REM NO 501 ADAPTOR ESS CHUCK $1895 800 395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUlliNG PLASTIC WOOD SOFT METAIS LEXAN PLEXIGLASS & ETC AILASLE IN 006008 010 012 014 016 019 025023025 028 032 ThICKNESS P OUTSIDE DLAAIETER @ $675 EA O 502ARBOR$600 503 14X 1/4 SA W $600 OUR SAWS ONLY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL GRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1I2 AB2 100 3AB5 1 50 2ABS 100 ARBOR 503600 SAWS AND CUT-OFF BLADES ONLY WORK WITH OUR ARBOR NO NEED FOR FLINT OR MATCHES MICRO 5fy JUST PRESS THE PIEZO SELF-STARTING SELF BUlTON FOR MICRO SIZE ADJUSTABLE II FLAME THAT BURNS AT 2370 FOR UP TC STARTING 3 HOURS OPERATES ON STANDARD CIGARETTE LIGHTER BUTANE AND IS TORCHREFILLABLE TANK FITS COMFORTABLY -IN THE PALM OF YOUR HAND AND IS MT77O - MADE OF HIGH IMPACT RUBBER WHICH Blow Torch ALLOWS FOR SAFE NON-SLIP GRIP wIth n ci bctan $3500 SUFFUED WITH CAN OF BUTANE BuIanc5oSe00WFORw PAfN ORDERING- FF0000 $300 EASTERN TOOL&SUPPLYCOC0DAOOSYSO 149 GRAND ST- NYC. NY 10013OFFICE 210-001-314B CATALOG FREE WITH ORDERFP01085-ISO YES THE TWIN-AIR 20 IS HERE AT LAST YES THE TWiN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUAUTY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATIC CAPABIU TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEAST AERODYNAMICS INCA 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length 43 Fuselage Width 35 Overall Weight Range -55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Ask local hobby shop OT order direct
Edition: Model Aviation - 1994/08
Page Numbers: 96, 97, 98
FREE FLIGHT DURATION COVERING CONFUSION Back 1950s simple just two choicesJapanese tissue silkspan Sure some folks used silk really soaked up dope color options silkspan limited white red yellow So time used tissue light lots colors nickel sheet along came plastic wraps literally after few tries mid 1950s decided plastic wraps better left leftovers made-for-models plastic films developed too heavy did try some clear Micafilm few years back weight wasnt bad didnt give wing same stiffness good old tissue-and-dope did What changed opinion plastics wasnt plastic coverings themselves new composite structures First Kevlar now carbon-fiber D-box construction creates wing very rigid doesnt need tissue give torsional strength needs something light cover spaces between ribs has led lot other folks re-think plastic film coverings Heres quick rundown options Clear mylar available both quarterand half-mil thicknesses incredibly cheap light use quarter-mil stabs just leave clear can dye Rit dye havent taken trouble yet understand some Russian glider fliers use half-mil mylar wings double-cover Japanese tissue color slightly rougher surface feel helps glide About problem using clear mylar especially thinner stuff mess handle Ive good luck taping piece frame covering much same way Indoor modelers cover microfilm bit misnomer film translucent white random fiber texture reminiscent silkspan covering followed suggestions Jim Parkers excellent series glider construction ran NFFS Digest last year Jims suggestion covered bottom wing first used thin CyA applied inside assure permanent bond undercambered ribs trailing edge lapped film up over top especially important using carbon-fiber trailing edge just isnt much gluing surface Covering went quickly no wait watershrinking doping wings looked rather bland doped some tissue numbers few large panels colored tissue just applied clear dope outline attached tissue smoothly possible watershrunk tissue coat clear finished up Total weight gain 162 square decameter wing about 250 square inches slightly less 11 grams including tissue decoration Another way add color clear Micafilm felt-tipped marker can use marker directly dull side film break open marker use entire piece felt Some colors such yellow highlighter go very evenly red tried streaked badly however Black didnt seem very dense mentioned Walt Rozelle using Micafilm FlJ model Walt said has good luck using black felt marker inside dull side film covering model coloring outer smooth side well dont know marker fuelproof Walt used tips shouldnt too much problem Like lighter plastic films mylar has no adhesive backing course saves considerable weight does require using heat-sensitive adhesive models frameworkThere seem about favorite formulae adhesives people using plastic film Ive good luck using Sig Stix-It straight out can important thing use little possible minimize creep cover rectangular stabs piece running film around trailing edge Shrink bottom first hold stab down shrink top dont overdo model thousand feet up thermal few small wrinkles wont matter last couple wings Ive used clear Micafilm Coverite name Aside ease covering puncture resistance plastic films waterproof models first outing damp foggy morning noticed plastic films wing stab drum tight looking better tissue World Championships last year quite few Europeans using white polyester covering called Polyspan supplied Austrian Klaus Salzer looks lot like silkspanThe material attached clear dope much like tissue couple coats 50-50 clear dope brushed fill pores hot iron can used remove wrinkles shrunk tight water Weight about 10% tissue polyester much puncture-resistant color polyester can dyed virtually no weight gain Arizona importer Sal Fuciano handling Polyspan 195- inch-wide 12-foot roll sells $15 plus postage Sal also has analine dye red yellow blue orange black $550 per three-ounce bottle address Starline 6146 East Cactus Wren Rd Scottsdale AZ 85253 Tel 602 948-5798 DPR Part DPR stands Delayed Prop Release Basically throw rubber-powered model straight up hard can timer releases propeller models continues its climb idea has around least two decades have seen American Ed Turner using World Champs looked like least half field using 96 Model Aviation span shown Alexander Andriukovs winning FiB durable though somewhat drab wing covering Igor Vivchar waits good air DPR front end uses simple external lever keep blades turning some sort DPR witnessed failure During three-minute rounds Ukrainians believe Eugeny Gorban stretched delay out little too long model stalled dropped its nose just missed ground climbed easy max did notice few other very short scores some other fliers may have couple DPR failures missed Europeans seemed like normal logical way launch rubber model no fumbling prop no wasted turns getting left hand Out way Just throw model very very hardstraight upand watch go Theres good bit discussion country about amount altitude gained using DPR theoreticians say gain minimal people actually using DPR getting models considerably higher models DPR DPR part approach puts very heavy emphasis getting model high possible means very clean low-drag model VIT variable incidence tailplane either threeposition auto-rudder wing wiggler assure very straight shall say ballistic climb conventional locked-up model would benefit little DPR Although DPR mechanisms can very sophisticated really dont need thats necessary lever noseblock will engage prop arms keep turning line back timer released /2 second after launch prop blades fold back under wing some sort latch mechanism needed keep blades forward launch dont foul wing prop starts turning can simple spring holds blade back slight angle blades begin turn centrifugal force releases spring blade pivots forward run position complicated mechanism within hub can hold blades out feathered during launch Until recently commercially-available DPR hubs rather hard come About way get head Europe buy one Soviet modelers breakup Soviet Union rush capitalism sophisticated DPR front ends much easier get Several importers such Sal Fruciano Starline handling various DPR front ends DPR front ends fall two broad categories external internal feathering extdrnal feathering types have fixed wire prop hangers spring hanger wire moves blade feathered full pitch blades begin turn internal feathering types use rotating wire hangers internal springs result cleaner front end thats usually bit lighter less prone damage crash way DPR system starts also falls two broad types uses very simple external lever mounted nose ring line wire back timer holds lever out against either blade wires small pin back spinner second type utilizes internal lever within noseblock stiff wire A6 inch runs timer forward small hole back noseblock pushes against lever turn engages slot spinner backplate wire released timer lever moves rear prop starts turning use commerciallyavailable DPR front ends setting up model DPR much complicated rigging floodoff system power model operative word though system aspect model design construction flying must done DPR mind timer start switch must work time rubber must selected stranded wound take advantage launch launch must hard accurate since model will climbing fast wings must stiff enough prevent flutter worth trouble Well ask winner last two World Championships DPR just high-tech Wakefields Several British modelers use DPR coupes Ill covering various aspects DPR next few columns need plunge ahead read next two items Cyclon Front Ends Mike Mulligan sent several sample FlB front ends Russia Cyclon units Mike will handling simple Montreal stop unit $40 feathering DPR unit $80 variablepitch DPR unit $120 Since three units share some features Ill discuss first feature red anodized aluminum finish use removable U-shaped rubber hook Also included T-shaped fitting allows fit regular winder rubber hook units feature 326mm 1 inch outside diameter 25mm inside diameter noseblock spinner backplate three units appear same basic pieces further machining needed add various DPR VP functions Theres good bit interchangeability among three units including prop shafts blade mounting arms three units use double ball bearings support prop shaft removable blade mounting arms can easily adjusted field exact pitch Montreal unit light 27g August1994 97 Russian Cyclon DPR front end uses internal springs rotate blade mounting arms feathered position launch blades stay out feathered reduced drag After 1/ second lever released model climbs away External springs mounting arms rotate blades desired pitch after internal pawl released wire timer simple would good choice first Wakefield DPR unit few grams heavier 31 g feathering mechanism internal start lever Like DPR units incorporates ratchet start lever allows add hand winds waiting big thermal VP unit weighs 35g weights 1 5g rubber hook Like complex expensive $300 Andriukov VP front end Cyclon uses torque-actuated cam vary propeller pitch during flight changing high low torque drops off cam Cyclon unit rather cleverly hidden inside cast carbon-fiber spinner However unlike Andriukov unit Cyclon does use ball-bearing cam followers ball-bearing mounts rotating blade arms Mike also has some Kevlar motor tubes formed balsa blades Since shipments Russia can problematic best write call Mike first see what has stock address Mike Mulligan 511 No Pageant #B Orange CA 92669 Tel 714 633-9282 Wakefield An Intermediate Text year ago mentioned Ron Felix importing some specialty Wakefield items Russia catalog business has prompted questions about what exotic bits pieces Ron has put together 44-page book building high-tech Wakefields text covers everything design through construction Although some references specific items catalog information would great benefit anyone getting ready try FlB lot basic information have seen anywhere else including install auto surface lines installing timers ready-made carbon fiber pylons construction wings stabs rudders good bit discussion trimming VIT model well rubber motor makeup Also included threeviews five state-of-the-art Wakes about best five bucks could spend serious about FiB address Ron Felix P 0 Box 74 Solebury PA 18963 just getting Wakefield first time Ron has also produced beginners text isalso$5 odel Aviation PTOR THROW AWAY YOUR COLLETS CHUCK & WRENCH USE OUR ADAPTOR & KEYLESS CHUCK OTO 5132 CAP ON ALL EgPOWER TOOLS INCLUDING [IMITE& EXIBLE SHAFT RUNS 100% TRUE & CONCENTRIC AT FULL REM NO 501 ADAPTOR ESS CHUCK $1895 800 395 DO NOT NEED ADAPTOR TO USE KEYLESS CHUCK STEEL SAW AND ARBOR HARDENED GROUND & POUSHED STEEL USED FOR CUlliNG PLASTIC WOOD SOFT METAIS LEXAN PLEXIGLASS & ETC AILASLE IN 006008 010 012 014 016 019 025023025 028 032 ThICKNESS P OUTSIDE DLAAIETER @ $675 EA O 502ARBOR$600 503 14X 1/4 SA W $600 OUR SAWS ONLY WORK WITH OUR ARBOR - ABRASIVE CUT-OFF BLADES FIBERGLASS REINFORCED-RESISTS BREAKAGE-CUT STEEL GRASS COPPER ALUMINUM AND OTHER METALS ALL BLADES 1/32 THICK WITH 1/4 HOLE SIZE NO PRICE SIZE NO PRICE 1I2 AB2 100 3AB5 1 50 2ABS 100 ARBOR 503600 SAWS AND CUT-OFF BLADES ONLY WORK WITH OUR ARBOR NO NEED FOR FLINT OR MATCHES MICRO 5fy JUST PRESS THE PIEZO SELF-STARTING SELF BUlTON FOR MICRO SIZE ADJUSTABLE II FLAME THAT BURNS AT 2370 FOR UP TC STARTING 3 HOURS OPERATES ON STANDARD CIGARETTE LIGHTER BUTANE AND IS TORCHREFILLABLE TANK FITS COMFORTABLY -IN THE PALM OF YOUR HAND AND IS MT77O - MADE OF HIGH IMPACT RUBBER WHICH Blow Torch ALLOWS FOR SAFE NON-SLIP GRIP wIth n ci bctan $3500 SUFFUED WITH CAN OF BUTANE BuIanc5oSe00WFORw PAfN ORDERING- FF0000 $300 EASTERN TOOL&SUPPLYCOC0DAOOSYSO 149 GRAND ST- NYC. NY 10013OFFICE 210-001-314B CATALOG FREE WITH ORDERFP01085-ISO YES THE TWIN-AIR 20 IS HERE AT LAST YES THE TWiN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUAUTY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATIC CAPABIU TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEAST AERODYNAMICS INCA 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length 43 Fuselage Width 35 Overall Weight Range -55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Ask local hobby shop OT order direct