The finishir Touch materials methods choose wayand go first series author sheds some much-needed light RC CL considerations OVER THE PAST 30 years model building have materials introduced covering finishing models popular easiest finish time became active mod eler Silkspan like tea-bag paper larger models used silk Dope finish used period 1948 Up time nitrate dope sufficed because models used either gasoline igni tion diesel engines rubber powered Ray Arden introduced glow plug engine late 1940s now familiar glow fuel containing alcohol nitromethane came being Nitrate dope no longer suitable began use butyrate dope Butyrate dope used full scale fabric-covered aircraft because fire resistant nitrate dope has virtue being hot fuel proof appropriately hot fuel resistant Modelers experimented numerous paints thought might overcome bad habits dope weaknesses include tendency shrink excessively continuing over period years less desired durability fading pigmen tation time general brittleness effort required apply objection family odor dope fact blushes applied Fred Marks Photos Bill McCaw high humidity Blushing appear ance milky whiteness pigmented dope occurs result trapped moisture air Blushings can overcome addition retarder dope slows its drying moisture can escape enamels like suitable boats car models too heavy use aircraft models modelers think polyester resin new field modeling used boats long ago just too heavy use aircraft models early 1960s Pettit Paints introduced Hobbypoxy first epoxy enamels characterized use catalyst caused basic material ~cure~ harden opposed use solvents must evaporate dope other paints Thus epoxy enamels shrink upon curing could also purchase epoxy enamels local hardware store Although no inherent reason dope contain low pigmentation epoxy automotive paints contain greater pigmentation thus affect quicker coverage epoxy paints some ex tent now suffer particular prob lemcompatibility Before final finish can applied model other molded fiberglass plastic structure covering model must filled provide smooth base final finish Pigmented finishes entirely too heavy expensive use purpose Thus filler materials different finish material must used leads problems compatibility An early experience epoxy enamels 1963 will illustrate point Falcon 56 covered silk usual weave sealed using butyrate dope instructed required time per mitted elapse before next step appli cation filler filler primer used epoxies akin automobile primer heavy filler hard sand unbelievable pro vided beautifully smooth base should also note Falcon 56 has open wing structure vs being sheeted job sanding extemely difficult base coat epoxy paint ap plied permitted harden thoroughly before masked off trim applied trim coat Imagine chagrin entire base color filler came up tape tried procedure once 32 Model Aviation before giving up Obviously work needed epoxies did fade use because people per severed recall remarks about hav ing beautifully shiny 400 grit finish because also took quite some time cure seemed attract dust manufacturers epoxy paints worked solve such problems modelers began discover acrylic lacquer acrylic enamels used automobiles handle quite like dope much less expensive acrylic lacquer has greater tendency brittleness extent imperative acrylic lacquers have plasticizer added Acrylic enamels other hand too flexible soft hand rubbing unless rather expensive hardener added acrylics particularly easy handle spray gun produce truly beautiful finish few pigmented coats same time plastic covering ma terials such Monokote almost seemed sweep field quick covering requires minimum efTort produce pretty model couldnt beat ever have look plastic rather deep rich appearance paint finish difficult apply Left ever-popular Ranger 42 has its foam surfaces transformed metallic-like sheen application Kromekote plastic film requires low heat setting iron Right Sequence pictures shows covering using plastic filmSolar Film case picture dust being removed structure means tack-rag covering film sure cut material bit oversizeand remember adhesive side goes toward structure lay out section cut Using sealing iron illustratedand sure read directions carefully come filmtack film periphery structure covered Its cinch Once covering tacked place bond thoroughly around periphery tip easily covered because care mate rials can worked around compound curves Although heating iron can used di rected shrink covering heat gun illus trated avoids chance scratching film does much faster job August1976 33 Finishing Touch complex compound curves con cavity present naturally didnt satisI needs purist still have problem wrinkling structure dries out winter months wrinkles can quickly removed reheating Because limitations modelers time heat shrinkable plastic coverings became almost accepted fact shop intro duction paintable versions overcame first above criticisms early 1970s engine size power available doubled over 1960 era RC aircraft model weigh&1 six pounds 1960 con sidered heavy norm competi tion radio control aircraft 1975 eight nine pounds control-line freeflight aircraft models weight still important ever However RC model control-line scale models began make use finish materials previously suitable boats cars par ticular use polyester resin epoxy glues sealer filler completely sheeted models no other covering came popular can simply brush two coats thinned resin epoxy glue sand glass-like consistency spray brush pigmented color coats method still presents some compatibility problems can quite brittle Thus some have introduced use extremely lightweight fiberglass cloth bonded place resin epoxy prevent cracking splitting Finally characteristics epoxy enamels have improved significantly achievement much shorter cure times better fillers primers greater flexibility recent introduction called Super Coverite heat shrinkable thermoplastic adhesive backed covering has finish coats already place Most preceding intended use wood fiberglass plastic models Molded polystyrene foam models primar ily aircraft models have become quite pop ular smaller sizes will ac cept materials contain sol vent because solvents also dissolve foam Thus either necessary seal foam base coat thinned white glue epoxy enamel simply apply light coat enamel designed plastic leads us point beginner faced confusing array possibilities finishing model experienced modeler faced finding way determine usefulness numerous new paints cover ings crop up year promising overcome weakness previous materials Select Use Finishing Materials Over own modeling career Ive used just about technique discussed earlier Some worked well others Ive used have seen used others know well have built some models well done least thought others colleagues charged obviously done frozen mop thing can tell reader abso lute fact quality finished model 90 percent function amount effort put job have learned hard vay can tell what isnt compatible job ultimate almost entirely function patience willingness work illustrate point beautifully finished models Ive ever seen Viper Dario Brisi ghelli won best finish award 1972 Toledo show relatively simple finishthe model balsa sheet sealer filler polyester resin very simple However finish consisted ten coats white dope base b ten coats trim color dope orange brown followed c ten coats clear dope model sanded number 600 dry paper between coat wiped down Prep-Sol between coats final clear hand rubbed waxed Are willing put kind effort would look simpler ways simpler ways few will produce kind finish What best needs depends model will first tackle suspect readers will encounter As space permits others will covered shall present info later issues Having done will able make appropriate selection basic needs Beginning Finish good finish whether simplest complex starts prepara tion surface shall assume have well constructed model neither warped nor poorly put together poorly prepared surface always shows up final finish errors cannot covered up paint procedure follows pertains specifically wood models Much follows naturally re quired finishing fiberglass plastic models As mentioned earlier styrofoam models required different technique 1 After blocks structure have carved sanded shape model considered ready finish rough sand entire model using first No 180 No 200 sandpaper first find necessary shape structure use paper coarse No 80 gently 2 Sand model over again 34 Model Aviation Although painted-on finishes also extremely popular Sig Kadet covered trimmed heat-shrinkable film typical shiny colored finishes result film using No 320 wet-or-dry paper black kind until smooth can get 3 point ding marks structure picked up during build ing will apparent can removed filling first wetting indented area water apply heat iron cause wood swell back its original shape Re-sand areas until smooth using number 320 paper Note stage finish work should done wet-or-dry paper 4 Any dings well cracks gaps etc werent correctable step 3 should filled using plastic wood Dap vinyl wood filler vinyl spackle hardware store Hobbypoxy Stuff automotive filler best automotive fillers called Green Stuff use mixture epoxy polyester resin balsa dust micro-balloons Note Never use epoxy micro-balloons polyester resin put over filler because resin will cure properly area 5 After filled areas have dried cured completely sand areas again No 320 paper sand entire model No 400 paper preferable use sanding blocks either commercially made homemade finish sanding order insure uniformity avoid having low high areas completion step use vacuum cleaner remove dust model go over struc ture lightly damp rag remove remaining dust 6 Use damp rag sponge dampen soak structure brings up nap wood causes sanding ridges rise After structure has dried resand No 400 remove nap ridges struc ture now ready finish steps One-Step Finish heat shrinkable polyester plastic covering such Solar Film Super Mono kote Super Coverite Top Cote like used can now applied No filler such dope etc should applied structure because heat required apply above coverings will cause sealer blister Just sure surface cleaned thoroughly dust proceed minimum tools required razor blade fresh X-Acto blade electric iron felt-tip pen small sealing iron such Sealectro heat gun such sold Top Flite aid doing professional job following steps apply Taken part Cover Super Monokote Top Flite Models 1 Place covering table backing side up backing usually clear plastic no adhesive adhesive coverings dry until heated iron However Top Cote Trim Monokote adhesive tacky Mark covering about inch wider narrow side two inches longer side example wing panel fuselage panel cut out sheet covering open structures fol lowing steps apply 2 Remove backing lay covering structure covered adhesive side toward structure forget side touch heated iron corner iron will stick adhesive side leads us point adhesive seeps out around joints sticks iron can removed dope thinner still stains iron best use 'moms~ good iron Best find used Allow overlap around overlap ends surfaces Try get covering smooth possible before start heat anywhere Set iron point just below melt point plastic adhesive should change color become quite sticky Now tack covering corners structure keep flopping around Keep covering smooth possible tack tip iron three intervals around periphery structure being covered covering tacked pro ceed seal covering structure around entire peripherey Use wad tissue press covering down adhesive cools 3 shrink covering tight set iron surface material glide back forth over entire area press down iron necessary covering can pressed tight surface using toilet tissue 4 finish wing-tip nose cowl etc has compound curves pull excess material applying heat surface heat will make pliable curvature can matched using tip iron press covering go Work way around curvature until wrinkles worked out Avoid usual temptation turn iron up higher August1976 35 Ace All-Star biplane illustrates use plastic enamel over molded polystyrene foam wings photographer purposely highlighted surface bring out texture foam foam can filled water-thinned white gluebui does add some weight Mylar tapes numerals Monokote stars here continued page 95 add nice touch otherwise plain plastic film covered wing Plain jobs can nice also can let imagination run riot Finishing Touch/Marks continued page 35 following applies covering sheeted areas such fuselage panels sheeted wings like 5 Lay out cut covering open structures Lay covering place work out bit air can beneath covering Bond cov ering center panel first iron toward edges panel allow ing air escape under material go sounds easier really isit extremely difficult avoid cap tured bubbles occurs just cant get rid prick bubble pin center iron air out heat gun does better job Use wad tissue bit cloth work air out cause covering bond Trim edges excess covering seal cut edges using iron plastic coverings can trimmed using other colors same covering using sticky trim sheets using decals Mylar stick-on numerals vinyl tape like large areas over solid sheeting trimmed best cut away base covering allow slight overlap one-fourth inch Trapped air bubbles real plague placing trim over base coat case base covering should pricked pin throughout area overlap permit air escape Editors Note September issue Mr Marks continues series cover ing finishes ADVERTISERS INDEX Ace Radio Control Inc54 Andrews Aircraft Model Co84 David Andrews CoCover 2 Astro Flight Inc90 Bantam Model Products Corp86 Coverite88 Cox Hobbies96 Cover 3 Cumberland Press82 Du-Bro Products Inc81 Dynatek91 EK-logictrol93 Enon Beach Camping91 J T Finley Company 82 Flyline Models94 Fox Mfg Company84 Carl Goldberg Models26 Grish Brothers93 Midwest Products Company. 83 87 Peck-Polymers89 Polks Hobby Dept Stores91 RSSystems85 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc92 Tyro Model & Supply96 VI Products89 Richard Wilkens92 Williams Brothers92 World EnginesBack Cover FULL-SIZE PLANS No 1 53Cerberus$475 RC 60-powered Pattern job retracts advanced features No 154MJ2Tempete$350 CL scale model famous homebuilt motor control sport 25 No 155Tellipsoar$1000 RC Standard Class sailplane wins stand-out performance No 156Free Spirit$400 FF Classes A&B combines excellent power/glide performance No1571935 Wakefield Winner$275 rubber power top job its day will delight old-timer No 100 No 101 No 102 No 103 No 104 No105 No107 No 108 No 109 No 110 No 111 No 112 No 113 No 114 No 116 No 117 No 118 No 119 No 120 No 121 No 122 No 123 No 124 No 125 No 126 No 127 No 129 No 130 No 131 No 134 No 135 No 136 No 137 No 138 No 139 No 140 No 141 No 142 No 143 No 144 No 145 No 146 No 147 No 148 No 149 No 150 No 151 No 152 Hinnants F-b ultimate maneuverability smoothness 60 Pattern job han $450 Short Seamew 40-powered Claun Carrier model good prototype lends itneif innovations $300 French Wench Free Flight Classes 1 /2A 049 051 fully tented denign $225 Kioud King 15-19 RC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder $225 Harold Ruarks Sportsman RC cabin job pretty nmooth lines 40 powered full-houne $450 Aeronca K 24 wingspan rubber Indoor Scale old-time lightplane Its done 90 secondn $200 Electric Couldot done Dick Sarpolus Astro 25 RC job performs patterns $375 Bill Fuoris Quarter Midget House Balna design modifications faster times $300 Zipper latest CL Scale Racers John Kdsdonk job wunt racing fann $175 Max-a-Million fleet free flights problem good A/B FAI $375 Sneat Sport RC glider simple job can flown engine $275 cessna 150 Acrobat Step up Half-A CL jobs 09-powered semi-profile easy build $275 Ernie Violects OH comet CL Scale 1974 Nats first-place winner classic twin $900 Electro-Lice Hal Covers contest-type free flight VTOsHysork electric motor $150 Novice simple beginners A-t Nordic constructed entirely sheet balsa $150 GollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Four Beginners Too basic RC trainer 09 15s rudder elevator motor controls $300 cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake $450 Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s $300 Hot Wood Twice Nats winner Rocket all-balsa Jetes-powered job $100 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer $100 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Time $175 Hooptee Mk Ill John Kiludonks CL Rat Racer involves latent state-of-the-art $175 BAc Drone Astro- 10 electric-powered 80 scale RC powered Glider $400 Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor tSs $275 Altair Class A-B Free Flight conversion data other classes $400 Gee Bee Model Y 40-powered RC stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nats first $400 Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team $275 Fieseler Scorch RC scale model 23-45 5-channel has both slots flaps $400 Ambivalent RC assist FF 29-352 chan. can converted sport $400 candle Wind Half-A free flight competition type offers looks performance $300 Jaguar FAI 15 Combat English champ offers different configuration $225 Nicuport Monoplane Another Hannan cutie CO2 indoor/outdoor Brown single twin $150 Blackburn Monoplane RC Scale rendition history-maker wheels floats 40 engine $450 Eagle CL holder Sr 1 /2A Proto Speed records Uses Con 049 $175 Sweepo rubber winning Coupe dHivercan also flown Unlimited $275 Shark RC conversion JETCO Shark coupled flaps elevators 45-60 $525 Japanese Myrt CL Carrier Class II model has extremely clean design Rossi 60 $275 QuickSilver RC 1/2A Pylon Racer incorporates latest tuchnipues $200 B-i 5 USAF bomber full house Ace foam wings Stable $275 BumbleBee Mk II Foam wing AMA fast-combat saves time cost $450 Comedian RC fun-fly aerobatic biplane good looker 40 60 $400 cardinal Sinner CL stunter 35 engines Detroiter type Very competiriun $375 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 Circle numbers plans wish order- 100 104105107108 113114 101102103 109110111112 116117118119 122123124125126 131134135 120121 127129130 136137138139141 147148149 142143144145146 150151152153 Please print carefully Enclosed $ 154155156157 NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 August1976 95
Edition: Model Aviation - 1976/08
Page Numbers: 32, 33, 34, 35, 95
The finishir Touch materials methods choose wayand go first series author sheds some much-needed light RC CL considerations OVER THE PAST 30 years model building have materials introduced covering finishing models popular easiest finish time became active mod eler Silkspan like tea-bag paper larger models used silk Dope finish used period 1948 Up time nitrate dope sufficed because models used either gasoline igni tion diesel engines rubber powered Ray Arden introduced glow plug engine late 1940s now familiar glow fuel containing alcohol nitromethane came being Nitrate dope no longer suitable began use butyrate dope Butyrate dope used full scale fabric-covered aircraft because fire resistant nitrate dope has virtue being hot fuel proof appropriately hot fuel resistant Modelers experimented numerous paints thought might overcome bad habits dope weaknesses include tendency shrink excessively continuing over period years less desired durability fading pigmen tation time general brittleness effort required apply objection family odor dope fact blushes applied Fred Marks Photos Bill McCaw high humidity Blushing appear ance milky whiteness pigmented dope occurs result trapped moisture air Blushings can overcome addition retarder dope slows its drying moisture can escape enamels like suitable boats car models too heavy use aircraft models modelers think polyester resin new field modeling used boats long ago just too heavy use aircraft models early 1960s Pettit Paints introduced Hobbypoxy first epoxy enamels characterized use catalyst caused basic material ~cure~ harden opposed use solvents must evaporate dope other paints Thus epoxy enamels shrink upon curing could also purchase epoxy enamels local hardware store Although no inherent reason dope contain low pigmentation epoxy automotive paints contain greater pigmentation thus affect quicker coverage epoxy paints some ex tent now suffer particular prob lemcompatibility Before final finish can applied model other molded fiberglass plastic structure covering model must filled provide smooth base final finish Pigmented finishes entirely too heavy expensive use purpose Thus filler materials different finish material must used leads problems compatibility An early experience epoxy enamels 1963 will illustrate point Falcon 56 covered silk usual weave sealed using butyrate dope instructed required time per mitted elapse before next step appli cation filler filler primer used epoxies akin automobile primer heavy filler hard sand unbelievable pro vided beautifully smooth base should also note Falcon 56 has open wing structure vs being sheeted job sanding extemely difficult base coat epoxy paint ap plied permitted harden thoroughly before masked off trim applied trim coat Imagine chagrin entire base color filler came up tape tried procedure once 32 Model Aviation before giving up Obviously work needed epoxies did fade use because people per severed recall remarks about hav ing beautifully shiny 400 grit finish because also took quite some time cure seemed attract dust manufacturers epoxy paints worked solve such problems modelers began discover acrylic lacquer acrylic enamels used automobiles handle quite like dope much less expensive acrylic lacquer has greater tendency brittleness extent imperative acrylic lacquers have plasticizer added Acrylic enamels other hand too flexible soft hand rubbing unless rather expensive hardener added acrylics particularly easy handle spray gun produce truly beautiful finish few pigmented coats same time plastic covering ma terials such Monokote almost seemed sweep field quick covering requires minimum efTort produce pretty model couldnt beat ever have look plastic rather deep rich appearance paint finish difficult apply Left ever-popular Ranger 42 has its foam surfaces transformed metallic-like sheen application Kromekote plastic film requires low heat setting iron Right Sequence pictures shows covering using plastic filmSolar Film case picture dust being removed structure means tack-rag covering film sure cut material bit oversizeand remember adhesive side goes toward structure lay out section cut Using sealing iron illustratedand sure read directions carefully come filmtack film periphery structure covered Its cinch Once covering tacked place bond thoroughly around periphery tip easily covered because care mate rials can worked around compound curves Although heating iron can used di rected shrink covering heat gun illus trated avoids chance scratching film does much faster job August1976 33 Finishing Touch complex compound curves con cavity present naturally didnt satisI needs purist still have problem wrinkling structure dries out winter months wrinkles can quickly removed reheating Because limitations modelers time heat shrinkable plastic coverings became almost accepted fact shop intro duction paintable versions overcame first above criticisms early 1970s engine size power available doubled over 1960 era RC aircraft model weigh&1 six pounds 1960 con sidered heavy norm competi tion radio control aircraft 1975 eight nine pounds control-line freeflight aircraft models weight still important ever However RC model control-line scale models began make use finish materials previously suitable boats cars par ticular use polyester resin epoxy glues sealer filler completely sheeted models no other covering came popular can simply brush two coats thinned resin epoxy glue sand glass-like consistency spray brush pigmented color coats method still presents some compatibility problems can quite brittle Thus some have introduced use extremely lightweight fiberglass cloth bonded place resin epoxy prevent cracking splitting Finally characteristics epoxy enamels have improved significantly achievement much shorter cure times better fillers primers greater flexibility recent introduction called Super Coverite heat shrinkable thermoplastic adhesive backed covering has finish coats already place Most preceding intended use wood fiberglass plastic models Molded polystyrene foam models primar ily aircraft models have become quite pop ular smaller sizes will ac cept materials contain sol vent because solvents also dissolve foam Thus either necessary seal foam base coat thinned white glue epoxy enamel simply apply light coat enamel designed plastic leads us point beginner faced confusing array possibilities finishing model experienced modeler faced finding way determine usefulness numerous new paints cover ings crop up year promising overcome weakness previous materials Select Use Finishing Materials Over own modeling career Ive used just about technique discussed earlier Some worked well others Ive used have seen used others know well have built some models well done least thought others colleagues charged obviously done frozen mop thing can tell reader abso lute fact quality finished model 90 percent function amount effort put job have learned hard vay can tell what isnt compatible job ultimate almost entirely function patience willingness work illustrate point beautifully finished models Ive ever seen Viper Dario Brisi ghelli won best finish award 1972 Toledo show relatively simple finishthe model balsa sheet sealer filler polyester resin very simple However finish consisted ten coats white dope base b ten coats trim color dope orange brown followed c ten coats clear dope model sanded number 600 dry paper between coat wiped down Prep-Sol between coats final clear hand rubbed waxed Are willing put kind effort would look simpler ways simpler ways few will produce kind finish What best needs depends model will first tackle suspect readers will encounter As space permits others will covered shall present info later issues Having done will able make appropriate selection basic needs Beginning Finish good finish whether simplest complex starts prepara tion surface shall assume have well constructed model neither warped nor poorly put together poorly prepared surface always shows up final finish errors cannot covered up paint procedure follows pertains specifically wood models Much follows naturally re quired finishing fiberglass plastic models As mentioned earlier styrofoam models required different technique 1 After blocks structure have carved sanded shape model considered ready finish rough sand entire model using first No 180 No 200 sandpaper first find necessary shape structure use paper coarse No 80 gently 2 Sand model over again 34 Model Aviation Although painted-on finishes also extremely popular Sig Kadet covered trimmed heat-shrinkable film typical shiny colored finishes result film using No 320 wet-or-dry paper black kind until smooth can get 3 point ding marks structure picked up during build ing will apparent can removed filling first wetting indented area water apply heat iron cause wood swell back its original shape Re-sand areas until smooth using number 320 paper Note stage finish work should done wet-or-dry paper 4 Any dings well cracks gaps etc werent correctable step 3 should filled using plastic wood Dap vinyl wood filler vinyl spackle hardware store Hobbypoxy Stuff automotive filler best automotive fillers called Green Stuff use mixture epoxy polyester resin balsa dust micro-balloons Note Never use epoxy micro-balloons polyester resin put over filler because resin will cure properly area 5 After filled areas have dried cured completely sand areas again No 320 paper sand entire model No 400 paper preferable use sanding blocks either commercially made homemade finish sanding order insure uniformity avoid having low high areas completion step use vacuum cleaner remove dust model go over struc ture lightly damp rag remove remaining dust 6 Use damp rag sponge dampen soak structure brings up nap wood causes sanding ridges rise After structure has dried resand No 400 remove nap ridges struc ture now ready finish steps One-Step Finish heat shrinkable polyester plastic covering such Solar Film Super Mono kote Super Coverite Top Cote like used can now applied No filler such dope etc should applied structure because heat required apply above coverings will cause sealer blister Just sure surface cleaned thoroughly dust proceed minimum tools required razor blade fresh X-Acto blade electric iron felt-tip pen small sealing iron such Sealectro heat gun such sold Top Flite aid doing professional job following steps apply Taken part Cover Super Monokote Top Flite Models 1 Place covering table backing side up backing usually clear plastic no adhesive adhesive coverings dry until heated iron However Top Cote Trim Monokote adhesive tacky Mark covering about inch wider narrow side two inches longer side example wing panel fuselage panel cut out sheet covering open structures fol lowing steps apply 2 Remove backing lay covering structure covered adhesive side toward structure forget side touch heated iron corner iron will stick adhesive side leads us point adhesive seeps out around joints sticks iron can removed dope thinner still stains iron best use 'moms~ good iron Best find used Allow overlap around overlap ends surfaces Try get covering smooth possible before start heat anywhere Set iron point just below melt point plastic adhesive should change color become quite sticky Now tack covering corners structure keep flopping around Keep covering smooth possible tack tip iron three intervals around periphery structure being covered covering tacked pro ceed seal covering structure around entire peripherey Use wad tissue press covering down adhesive cools 3 shrink covering tight set iron surface material glide back forth over entire area press down iron necessary covering can pressed tight surface using toilet tissue 4 finish wing-tip nose cowl etc has compound curves pull excess material applying heat surface heat will make pliable curvature can matched using tip iron press covering go Work way around curvature until wrinkles worked out Avoid usual temptation turn iron up higher August1976 35 Ace All-Star biplane illustrates use plastic enamel over molded polystyrene foam wings photographer purposely highlighted surface bring out texture foam foam can filled water-thinned white gluebui does add some weight Mylar tapes numerals Monokote stars here continued page 95 add nice touch otherwise plain plastic film covered wing Plain jobs can nice also can let imagination run riot Finishing Touch/Marks continued page 35 following applies covering sheeted areas such fuselage panels sheeted wings like 5 Lay out cut covering open structures Lay covering place work out bit air can beneath covering Bond cov ering center panel first iron toward edges panel allow ing air escape under material go sounds easier really isit extremely difficult avoid cap tured bubbles occurs just cant get rid prick bubble pin center iron air out heat gun does better job Use wad tissue bit cloth work air out cause covering bond Trim edges excess covering seal cut edges using iron plastic coverings can trimmed using other colors same covering using sticky trim sheets using decals Mylar stick-on numerals vinyl tape like large areas over solid sheeting trimmed best cut away base covering allow slight overlap one-fourth inch Trapped air bubbles real plague placing trim over base coat case base covering should pricked pin throughout area overlap permit air escape Editors Note September issue Mr Marks continues series cover ing finishes ADVERTISERS INDEX Ace Radio Control Inc54 Andrews Aircraft Model Co84 David Andrews CoCover 2 Astro Flight Inc90 Bantam Model Products Corp86 Coverite88 Cox Hobbies96 Cover 3 Cumberland Press82 Du-Bro Products Inc81 Dynatek91 EK-logictrol93 Enon Beach Camping91 J T Finley Company 82 Flyline Models94 Fox Mfg Company84 Carl Goldberg Models26 Grish Brothers93 Midwest Products Company. 83 87 Peck-Polymers89 Polks Hobby Dept Stores91 RSSystems85 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc92 Tyro Model & Supply96 VI Products89 Richard Wilkens92 Williams Brothers92 World EnginesBack Cover FULL-SIZE PLANS No 1 53Cerberus$475 RC 60-powered Pattern job retracts advanced features No 154MJ2Tempete$350 CL scale model famous homebuilt motor control sport 25 No 155Tellipsoar$1000 RC Standard Class sailplane wins stand-out performance No 156Free Spirit$400 FF Classes A&B combines excellent power/glide performance No1571935 Wakefield Winner$275 rubber power top job its day will delight old-timer No 100 No 101 No 102 No 103 No 104 No105 No107 No 108 No 109 No 110 No 111 No 112 No 113 No 114 No 116 No 117 No 118 No 119 No 120 No 121 No 122 No 123 No 124 No 125 No 126 No 127 No 129 No 130 No 131 No 134 No 135 No 136 No 137 No 138 No 139 No 140 No 141 No 142 No 143 No 144 No 145 No 146 No 147 No 148 No 149 No 150 No 151 No 152 Hinnants F-b ultimate maneuverability smoothness 60 Pattern job han $450 Short Seamew 40-powered Claun Carrier model good prototype lends itneif innovations $300 French Wench Free Flight Classes 1 /2A 049 051 fully tented denign $225 Kioud King 15-19 RC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder $225 Harold Ruarks Sportsman RC cabin job pretty nmooth lines 40 powered full-houne $450 Aeronca K 24 wingspan rubber Indoor Scale old-time lightplane Its done 90 secondn $200 Electric Couldot done Dick Sarpolus Astro 25 RC job performs patterns $375 Bill Fuoris Quarter Midget House Balna design modifications faster times $300 Zipper latest CL Scale Racers John Kdsdonk job wunt racing fann $175 Max-a-Million fleet free flights problem good A/B FAI $375 Sneat Sport RC glider simple job can flown engine $275 cessna 150 Acrobat Step up Half-A CL jobs 09-powered semi-profile easy build $275 Ernie Violects OH comet CL Scale 1974 Nats first-place winner classic twin $900 Electro-Lice Hal Covers contest-type free flight VTOsHysork electric motor $150 Novice simple beginners A-t Nordic constructed entirely sheet balsa $150 GollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Four Beginners Too basic RC trainer 09 15s rudder elevator motor controls $300 cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake $450 Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s $300 Hot Wood Twice Nats winner Rocket all-balsa Jetes-powered job $100 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer $100 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Time $175 Hooptee Mk Ill John Kiludonks CL Rat Racer involves latent state-of-the-art $175 BAc Drone Astro- 10 electric-powered 80 scale RC powered Glider $400 Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor tSs $275 Altair Class A-B Free Flight conversion data other classes $400 Gee Bee Model Y 40-powered RC stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nats first $400 Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team $275 Fieseler Scorch RC scale model 23-45 5-channel has both slots flaps $400 Ambivalent RC assist FF 29-352 chan. can converted sport $400 candle Wind Half-A free flight competition type offers looks performance $300 Jaguar FAI 15 Combat English champ offers different configuration $225 Nicuport Monoplane Another Hannan cutie CO2 indoor/outdoor Brown single twin $150 Blackburn Monoplane RC Scale rendition history-maker wheels floats 40 engine $450 Eagle CL holder Sr 1 /2A Proto Speed records Uses Con 049 $175 Sweepo rubber winning Coupe dHivercan also flown Unlimited $275 Shark RC conversion JETCO Shark coupled flaps elevators 45-60 $525 Japanese Myrt CL Carrier Class II model has extremely clean design Rossi 60 $275 QuickSilver RC 1/2A Pylon Racer incorporates latest tuchnipues $200 B-i 5 USAF bomber full house Ace foam wings Stable $275 BumbleBee Mk II Foam wing AMA fast-combat saves time cost $450 Comedian RC fun-fly aerobatic biplane good looker 40 60 $400 cardinal Sinner CL stunter 35 engines Detroiter type Very competiriun $375 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 Circle numbers plans wish order- 100 104105107108 113114 101102103 109110111112 116117118119 122123124125126 131134135 120121 127129130 136137138139141 147148149 142143144145146 150151152153 Please print carefully Enclosed $ 154155156157 NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 August1976 95
Edition: Model Aviation - 1976/08
Page Numbers: 32, 33, 34, 35, 95
The finishir Touch materials methods choose wayand go first series author sheds some much-needed light RC CL considerations OVER THE PAST 30 years model building have materials introduced covering finishing models popular easiest finish time became active mod eler Silkspan like tea-bag paper larger models used silk Dope finish used period 1948 Up time nitrate dope sufficed because models used either gasoline igni tion diesel engines rubber powered Ray Arden introduced glow plug engine late 1940s now familiar glow fuel containing alcohol nitromethane came being Nitrate dope no longer suitable began use butyrate dope Butyrate dope used full scale fabric-covered aircraft because fire resistant nitrate dope has virtue being hot fuel proof appropriately hot fuel resistant Modelers experimented numerous paints thought might overcome bad habits dope weaknesses include tendency shrink excessively continuing over period years less desired durability fading pigmen tation time general brittleness effort required apply objection family odor dope fact blushes applied Fred Marks Photos Bill McCaw high humidity Blushing appear ance milky whiteness pigmented dope occurs result trapped moisture air Blushings can overcome addition retarder dope slows its drying moisture can escape enamels like suitable boats car models too heavy use aircraft models modelers think polyester resin new field modeling used boats long ago just too heavy use aircraft models early 1960s Pettit Paints introduced Hobbypoxy first epoxy enamels characterized use catalyst caused basic material ~cure~ harden opposed use solvents must evaporate dope other paints Thus epoxy enamels shrink upon curing could also purchase epoxy enamels local hardware store Although no inherent reason dope contain low pigmentation epoxy automotive paints contain greater pigmentation thus affect quicker coverage epoxy paints some ex tent now suffer particular prob lemcompatibility Before final finish can applied model other molded fiberglass plastic structure covering model must filled provide smooth base final finish Pigmented finishes entirely too heavy expensive use purpose Thus filler materials different finish material must used leads problems compatibility An early experience epoxy enamels 1963 will illustrate point Falcon 56 covered silk usual weave sealed using butyrate dope instructed required time per mitted elapse before next step appli cation filler filler primer used epoxies akin automobile primer heavy filler hard sand unbelievable pro vided beautifully smooth base should also note Falcon 56 has open wing structure vs being sheeted job sanding extemely difficult base coat epoxy paint ap plied permitted harden thoroughly before masked off trim applied trim coat Imagine chagrin entire base color filler came up tape tried procedure once 32 Model Aviation before giving up Obviously work needed epoxies did fade use because people per severed recall remarks about hav ing beautifully shiny 400 grit finish because also took quite some time cure seemed attract dust manufacturers epoxy paints worked solve such problems modelers began discover acrylic lacquer acrylic enamels used automobiles handle quite like dope much less expensive acrylic lacquer has greater tendency brittleness extent imperative acrylic lacquers have plasticizer added Acrylic enamels other hand too flexible soft hand rubbing unless rather expensive hardener added acrylics particularly easy handle spray gun produce truly beautiful finish few pigmented coats same time plastic covering ma terials such Monokote almost seemed sweep field quick covering requires minimum efTort produce pretty model couldnt beat ever have look plastic rather deep rich appearance paint finish difficult apply Left ever-popular Ranger 42 has its foam surfaces transformed metallic-like sheen application Kromekote plastic film requires low heat setting iron Right Sequence pictures shows covering using plastic filmSolar Film case picture dust being removed structure means tack-rag covering film sure cut material bit oversizeand remember adhesive side goes toward structure lay out section cut Using sealing iron illustratedand sure read directions carefully come filmtack film periphery structure covered Its cinch Once covering tacked place bond thoroughly around periphery tip easily covered because care mate rials can worked around compound curves Although heating iron can used di rected shrink covering heat gun illus trated avoids chance scratching film does much faster job August1976 33 Finishing Touch complex compound curves con cavity present naturally didnt satisI needs purist still have problem wrinkling structure dries out winter months wrinkles can quickly removed reheating Because limitations modelers time heat shrinkable plastic coverings became almost accepted fact shop intro duction paintable versions overcame first above criticisms early 1970s engine size power available doubled over 1960 era RC aircraft model weigh&1 six pounds 1960 con sidered heavy norm competi tion radio control aircraft 1975 eight nine pounds control-line freeflight aircraft models weight still important ever However RC model control-line scale models began make use finish materials previously suitable boats cars par ticular use polyester resin epoxy glues sealer filler completely sheeted models no other covering came popular can simply brush two coats thinned resin epoxy glue sand glass-like consistency spray brush pigmented color coats method still presents some compatibility problems can quite brittle Thus some have introduced use extremely lightweight fiberglass cloth bonded place resin epoxy prevent cracking splitting Finally characteristics epoxy enamels have improved significantly achievement much shorter cure times better fillers primers greater flexibility recent introduction called Super Coverite heat shrinkable thermoplastic adhesive backed covering has finish coats already place Most preceding intended use wood fiberglass plastic models Molded polystyrene foam models primar ily aircraft models have become quite pop ular smaller sizes will ac cept materials contain sol vent because solvents also dissolve foam Thus either necessary seal foam base coat thinned white glue epoxy enamel simply apply light coat enamel designed plastic leads us point beginner faced confusing array possibilities finishing model experienced modeler faced finding way determine usefulness numerous new paints cover ings crop up year promising overcome weakness previous materials Select Use Finishing Materials Over own modeling career Ive used just about technique discussed earlier Some worked well others Ive used have seen used others know well have built some models well done least thought others colleagues charged obviously done frozen mop thing can tell reader abso lute fact quality finished model 90 percent function amount effort put job have learned hard vay can tell what isnt compatible job ultimate almost entirely function patience willingness work illustrate point beautifully finished models Ive ever seen Viper Dario Brisi ghelli won best finish award 1972 Toledo show relatively simple finishthe model balsa sheet sealer filler polyester resin very simple However finish consisted ten coats white dope base b ten coats trim color dope orange brown followed c ten coats clear dope model sanded number 600 dry paper between coat wiped down Prep-Sol between coats final clear hand rubbed waxed Are willing put kind effort would look simpler ways simpler ways few will produce kind finish What best needs depends model will first tackle suspect readers will encounter As space permits others will covered shall present info later issues Having done will able make appropriate selection basic needs Beginning Finish good finish whether simplest complex starts prepara tion surface shall assume have well constructed model neither warped nor poorly put together poorly prepared surface always shows up final finish errors cannot covered up paint procedure follows pertains specifically wood models Much follows naturally re quired finishing fiberglass plastic models As mentioned earlier styrofoam models required different technique 1 After blocks structure have carved sanded shape model considered ready finish rough sand entire model using first No 180 No 200 sandpaper first find necessary shape structure use paper coarse No 80 gently 2 Sand model over again 34 Model Aviation Although painted-on finishes also extremely popular Sig Kadet covered trimmed heat-shrinkable film typical shiny colored finishes result film using No 320 wet-or-dry paper black kind until smooth can get 3 point ding marks structure picked up during build ing will apparent can removed filling first wetting indented area water apply heat iron cause wood swell back its original shape Re-sand areas until smooth using number 320 paper Note stage finish work should done wet-or-dry paper 4 Any dings well cracks gaps etc werent correctable step 3 should filled using plastic wood Dap vinyl wood filler vinyl spackle hardware store Hobbypoxy Stuff automotive filler best automotive fillers called Green Stuff use mixture epoxy polyester resin balsa dust micro-balloons Note Never use epoxy micro-balloons polyester resin put over filler because resin will cure properly area 5 After filled areas have dried cured completely sand areas again No 320 paper sand entire model No 400 paper preferable use sanding blocks either commercially made homemade finish sanding order insure uniformity avoid having low high areas completion step use vacuum cleaner remove dust model go over struc ture lightly damp rag remove remaining dust 6 Use damp rag sponge dampen soak structure brings up nap wood causes sanding ridges rise After structure has dried resand No 400 remove nap ridges struc ture now ready finish steps One-Step Finish heat shrinkable polyester plastic covering such Solar Film Super Mono kote Super Coverite Top Cote like used can now applied No filler such dope etc should applied structure because heat required apply above coverings will cause sealer blister Just sure surface cleaned thoroughly dust proceed minimum tools required razor blade fresh X-Acto blade electric iron felt-tip pen small sealing iron such Sealectro heat gun such sold Top Flite aid doing professional job following steps apply Taken part Cover Super Monokote Top Flite Models 1 Place covering table backing side up backing usually clear plastic no adhesive adhesive coverings dry until heated iron However Top Cote Trim Monokote adhesive tacky Mark covering about inch wider narrow side two inches longer side example wing panel fuselage panel cut out sheet covering open structures fol lowing steps apply 2 Remove backing lay covering structure covered adhesive side toward structure forget side touch heated iron corner iron will stick adhesive side leads us point adhesive seeps out around joints sticks iron can removed dope thinner still stains iron best use 'moms~ good iron Best find used Allow overlap around overlap ends surfaces Try get covering smooth possible before start heat anywhere Set iron point just below melt point plastic adhesive should change color become quite sticky Now tack covering corners structure keep flopping around Keep covering smooth possible tack tip iron three intervals around periphery structure being covered covering tacked pro ceed seal covering structure around entire peripherey Use wad tissue press covering down adhesive cools 3 shrink covering tight set iron surface material glide back forth over entire area press down iron necessary covering can pressed tight surface using toilet tissue 4 finish wing-tip nose cowl etc has compound curves pull excess material applying heat surface heat will make pliable curvature can matched using tip iron press covering go Work way around curvature until wrinkles worked out Avoid usual temptation turn iron up higher August1976 35 Ace All-Star biplane illustrates use plastic enamel over molded polystyrene foam wings photographer purposely highlighted surface bring out texture foam foam can filled water-thinned white gluebui does add some weight Mylar tapes numerals Monokote stars here continued page 95 add nice touch otherwise plain plastic film covered wing Plain jobs can nice also can let imagination run riot Finishing Touch/Marks continued page 35 following applies covering sheeted areas such fuselage panels sheeted wings like 5 Lay out cut covering open structures Lay covering place work out bit air can beneath covering Bond cov ering center panel first iron toward edges panel allow ing air escape under material go sounds easier really isit extremely difficult avoid cap tured bubbles occurs just cant get rid prick bubble pin center iron air out heat gun does better job Use wad tissue bit cloth work air out cause covering bond Trim edges excess covering seal cut edges using iron plastic coverings can trimmed using other colors same covering using sticky trim sheets using decals Mylar stick-on numerals vinyl tape like large areas over solid sheeting trimmed best cut away base covering allow slight overlap one-fourth inch Trapped air bubbles real plague placing trim over base coat case base covering should pricked pin throughout area overlap permit air escape Editors Note September issue Mr Marks continues series cover ing finishes ADVERTISERS INDEX Ace Radio Control Inc54 Andrews Aircraft Model Co84 David Andrews CoCover 2 Astro Flight Inc90 Bantam Model Products Corp86 Coverite88 Cox Hobbies96 Cover 3 Cumberland Press82 Du-Bro Products Inc81 Dynatek91 EK-logictrol93 Enon Beach Camping91 J T Finley Company 82 Flyline Models94 Fox Mfg Company84 Carl Goldberg Models26 Grish Brothers93 Midwest Products Company. 83 87 Peck-Polymers89 Polks Hobby Dept Stores91 RSSystems85 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc92 Tyro Model & Supply96 VI Products89 Richard Wilkens92 Williams Brothers92 World EnginesBack Cover FULL-SIZE PLANS No 1 53Cerberus$475 RC 60-powered Pattern job retracts advanced features No 154MJ2Tempete$350 CL scale model famous homebuilt motor control sport 25 No 155Tellipsoar$1000 RC Standard Class sailplane wins stand-out performance No 156Free Spirit$400 FF Classes A&B combines excellent power/glide performance No1571935 Wakefield Winner$275 rubber power top job its day will delight old-timer No 100 No 101 No 102 No 103 No 104 No105 No107 No 108 No 109 No 110 No 111 No 112 No 113 No 114 No 116 No 117 No 118 No 119 No 120 No 121 No 122 No 123 No 124 No 125 No 126 No 127 No 129 No 130 No 131 No 134 No 135 No 136 No 137 No 138 No 139 No 140 No 141 No 142 No 143 No 144 No 145 No 146 No 147 No 148 No 149 No 150 No 151 No 152 Hinnants F-b ultimate maneuverability smoothness 60 Pattern job han $450 Short Seamew 40-powered Claun Carrier model good prototype lends itneif innovations $300 French Wench Free Flight Classes 1 /2A 049 051 fully tented denign $225 Kioud King 15-19 RC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder $225 Harold Ruarks Sportsman RC cabin job pretty nmooth lines 40 powered full-houne $450 Aeronca K 24 wingspan rubber Indoor Scale old-time lightplane Its done 90 secondn $200 Electric Couldot done Dick Sarpolus Astro 25 RC job performs patterns $375 Bill Fuoris Quarter Midget House Balna design modifications faster times $300 Zipper latest CL Scale Racers John Kdsdonk job wunt racing fann $175 Max-a-Million fleet free flights problem good A/B FAI $375 Sneat Sport RC glider simple job can flown engine $275 cessna 150 Acrobat Step up Half-A CL jobs 09-powered semi-profile easy build $275 Ernie Violects OH comet CL Scale 1974 Nats first-place winner classic twin $900 Electro-Lice Hal Covers contest-type free flight VTOsHysork electric motor $150 Novice simple beginners A-t Nordic constructed entirely sheet balsa $150 GollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Four Beginners Too basic RC trainer 09 15s rudder elevator motor controls $300 cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake $450 Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s $300 Hot Wood Twice Nats winner Rocket all-balsa Jetes-powered job $100 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer $100 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Time $175 Hooptee Mk Ill John Kiludonks CL Rat Racer involves latent state-of-the-art $175 BAc Drone Astro- 10 electric-powered 80 scale RC powered Glider $400 Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor tSs $275 Altair Class A-B Free Flight conversion data other classes $400 Gee Bee Model Y 40-powered RC stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nats first $400 Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team $275 Fieseler Scorch RC scale model 23-45 5-channel has both slots flaps $400 Ambivalent RC assist FF 29-352 chan. can converted sport $400 candle Wind Half-A free flight competition type offers looks performance $300 Jaguar FAI 15 Combat English champ offers different configuration $225 Nicuport Monoplane Another Hannan cutie CO2 indoor/outdoor Brown single twin $150 Blackburn Monoplane RC Scale rendition history-maker wheels floats 40 engine $450 Eagle CL holder Sr 1 /2A Proto Speed records Uses Con 049 $175 Sweepo rubber winning Coupe dHivercan also flown Unlimited $275 Shark RC conversion JETCO Shark coupled flaps elevators 45-60 $525 Japanese Myrt CL Carrier Class II model has extremely clean design Rossi 60 $275 QuickSilver RC 1/2A Pylon Racer incorporates latest tuchnipues $200 B-i 5 USAF bomber full house Ace foam wings Stable $275 BumbleBee Mk II Foam wing AMA fast-combat saves time cost $450 Comedian RC fun-fly aerobatic biplane good looker 40 60 $400 cardinal Sinner CL stunter 35 engines Detroiter type Very competiriun $375 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 Circle numbers plans wish order- 100 104105107108 113114 101102103 109110111112 116117118119 122123124125126 131134135 120121 127129130 136137138139141 147148149 142143144145146 150151152153 Please print carefully Enclosed $ 154155156157 NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 August1976 95
Edition: Model Aviation - 1976/08
Page Numbers: 32, 33, 34, 35, 95
The finishir Touch materials methods choose wayand go first series author sheds some much-needed light RC CL considerations OVER THE PAST 30 years model building have materials introduced covering finishing models popular easiest finish time became active mod eler Silkspan like tea-bag paper larger models used silk Dope finish used period 1948 Up time nitrate dope sufficed because models used either gasoline igni tion diesel engines rubber powered Ray Arden introduced glow plug engine late 1940s now familiar glow fuel containing alcohol nitromethane came being Nitrate dope no longer suitable began use butyrate dope Butyrate dope used full scale fabric-covered aircraft because fire resistant nitrate dope has virtue being hot fuel proof appropriately hot fuel resistant Modelers experimented numerous paints thought might overcome bad habits dope weaknesses include tendency shrink excessively continuing over period years less desired durability fading pigmen tation time general brittleness effort required apply objection family odor dope fact blushes applied Fred Marks Photos Bill McCaw high humidity Blushing appear ance milky whiteness pigmented dope occurs result trapped moisture air Blushings can overcome addition retarder dope slows its drying moisture can escape enamels like suitable boats car models too heavy use aircraft models modelers think polyester resin new field modeling used boats long ago just too heavy use aircraft models early 1960s Pettit Paints introduced Hobbypoxy first epoxy enamels characterized use catalyst caused basic material ~cure~ harden opposed use solvents must evaporate dope other paints Thus epoxy enamels shrink upon curing could also purchase epoxy enamels local hardware store Although no inherent reason dope contain low pigmentation epoxy automotive paints contain greater pigmentation thus affect quicker coverage epoxy paints some ex tent now suffer particular prob lemcompatibility Before final finish can applied model other molded fiberglass plastic structure covering model must filled provide smooth base final finish Pigmented finishes entirely too heavy expensive use purpose Thus filler materials different finish material must used leads problems compatibility An early experience epoxy enamels 1963 will illustrate point Falcon 56 covered silk usual weave sealed using butyrate dope instructed required time per mitted elapse before next step appli cation filler filler primer used epoxies akin automobile primer heavy filler hard sand unbelievable pro vided beautifully smooth base should also note Falcon 56 has open wing structure vs being sheeted job sanding extemely difficult base coat epoxy paint ap plied permitted harden thoroughly before masked off trim applied trim coat Imagine chagrin entire base color filler came up tape tried procedure once 32 Model Aviation before giving up Obviously work needed epoxies did fade use because people per severed recall remarks about hav ing beautifully shiny 400 grit finish because also took quite some time cure seemed attract dust manufacturers epoxy paints worked solve such problems modelers began discover acrylic lacquer acrylic enamels used automobiles handle quite like dope much less expensive acrylic lacquer has greater tendency brittleness extent imperative acrylic lacquers have plasticizer added Acrylic enamels other hand too flexible soft hand rubbing unless rather expensive hardener added acrylics particularly easy handle spray gun produce truly beautiful finish few pigmented coats same time plastic covering ma terials such Monokote almost seemed sweep field quick covering requires minimum efTort produce pretty model couldnt beat ever have look plastic rather deep rich appearance paint finish difficult apply Left ever-popular Ranger 42 has its foam surfaces transformed metallic-like sheen application Kromekote plastic film requires low heat setting iron Right Sequence pictures shows covering using plastic filmSolar Film case picture dust being removed structure means tack-rag covering film sure cut material bit oversizeand remember adhesive side goes toward structure lay out section cut Using sealing iron illustratedand sure read directions carefully come filmtack film periphery structure covered Its cinch Once covering tacked place bond thoroughly around periphery tip easily covered because care mate rials can worked around compound curves Although heating iron can used di rected shrink covering heat gun illus trated avoids chance scratching film does much faster job August1976 33 Finishing Touch complex compound curves con cavity present naturally didnt satisI needs purist still have problem wrinkling structure dries out winter months wrinkles can quickly removed reheating Because limitations modelers time heat shrinkable plastic coverings became almost accepted fact shop intro duction paintable versions overcame first above criticisms early 1970s engine size power available doubled over 1960 era RC aircraft model weigh&1 six pounds 1960 con sidered heavy norm competi tion radio control aircraft 1975 eight nine pounds control-line freeflight aircraft models weight still important ever However RC model control-line scale models began make use finish materials previously suitable boats cars par ticular use polyester resin epoxy glues sealer filler completely sheeted models no other covering came popular can simply brush two coats thinned resin epoxy glue sand glass-like consistency spray brush pigmented color coats method still presents some compatibility problems can quite brittle Thus some have introduced use extremely lightweight fiberglass cloth bonded place resin epoxy prevent cracking splitting Finally characteristics epoxy enamels have improved significantly achievement much shorter cure times better fillers primers greater flexibility recent introduction called Super Coverite heat shrinkable thermoplastic adhesive backed covering has finish coats already place Most preceding intended use wood fiberglass plastic models Molded polystyrene foam models primar ily aircraft models have become quite pop ular smaller sizes will ac cept materials contain sol vent because solvents also dissolve foam Thus either necessary seal foam base coat thinned white glue epoxy enamel simply apply light coat enamel designed plastic leads us point beginner faced confusing array possibilities finishing model experienced modeler faced finding way determine usefulness numerous new paints cover ings crop up year promising overcome weakness previous materials Select Use Finishing Materials Over own modeling career Ive used just about technique discussed earlier Some worked well others Ive used have seen used others know well have built some models well done least thought others colleagues charged obviously done frozen mop thing can tell reader abso lute fact quality finished model 90 percent function amount effort put job have learned hard vay can tell what isnt compatible job ultimate almost entirely function patience willingness work illustrate point beautifully finished models Ive ever seen Viper Dario Brisi ghelli won best finish award 1972 Toledo show relatively simple finishthe model balsa sheet sealer filler polyester resin very simple However finish consisted ten coats white dope base b ten coats trim color dope orange brown followed c ten coats clear dope model sanded number 600 dry paper between coat wiped down Prep-Sol between coats final clear hand rubbed waxed Are willing put kind effort would look simpler ways simpler ways few will produce kind finish What best needs depends model will first tackle suspect readers will encounter As space permits others will covered shall present info later issues Having done will able make appropriate selection basic needs Beginning Finish good finish whether simplest complex starts prepara tion surface shall assume have well constructed model neither warped nor poorly put together poorly prepared surface always shows up final finish errors cannot covered up paint procedure follows pertains specifically wood models Much follows naturally re quired finishing fiberglass plastic models As mentioned earlier styrofoam models required different technique 1 After blocks structure have carved sanded shape model considered ready finish rough sand entire model using first No 180 No 200 sandpaper first find necessary shape structure use paper coarse No 80 gently 2 Sand model over again 34 Model Aviation Although painted-on finishes also extremely popular Sig Kadet covered trimmed heat-shrinkable film typical shiny colored finishes result film using No 320 wet-or-dry paper black kind until smooth can get 3 point ding marks structure picked up during build ing will apparent can removed filling first wetting indented area water apply heat iron cause wood swell back its original shape Re-sand areas until smooth using number 320 paper Note stage finish work should done wet-or-dry paper 4 Any dings well cracks gaps etc werent correctable step 3 should filled using plastic wood Dap vinyl wood filler vinyl spackle hardware store Hobbypoxy Stuff automotive filler best automotive fillers called Green Stuff use mixture epoxy polyester resin balsa dust micro-balloons Note Never use epoxy micro-balloons polyester resin put over filler because resin will cure properly area 5 After filled areas have dried cured completely sand areas again No 320 paper sand entire model No 400 paper preferable use sanding blocks either commercially made homemade finish sanding order insure uniformity avoid having low high areas completion step use vacuum cleaner remove dust model go over struc ture lightly damp rag remove remaining dust 6 Use damp rag sponge dampen soak structure brings up nap wood causes sanding ridges rise After structure has dried resand No 400 remove nap ridges struc ture now ready finish steps One-Step Finish heat shrinkable polyester plastic covering such Solar Film Super Mono kote Super Coverite Top Cote like used can now applied No filler such dope etc should applied structure because heat required apply above coverings will cause sealer blister Just sure surface cleaned thoroughly dust proceed minimum tools required razor blade fresh X-Acto blade electric iron felt-tip pen small sealing iron such Sealectro heat gun such sold Top Flite aid doing professional job following steps apply Taken part Cover Super Monokote Top Flite Models 1 Place covering table backing side up backing usually clear plastic no adhesive adhesive coverings dry until heated iron However Top Cote Trim Monokote adhesive tacky Mark covering about inch wider narrow side two inches longer side example wing panel fuselage panel cut out sheet covering open structures fol lowing steps apply 2 Remove backing lay covering structure covered adhesive side toward structure forget side touch heated iron corner iron will stick adhesive side leads us point adhesive seeps out around joints sticks iron can removed dope thinner still stains iron best use 'moms~ good iron Best find used Allow overlap around overlap ends surfaces Try get covering smooth possible before start heat anywhere Set iron point just below melt point plastic adhesive should change color become quite sticky Now tack covering corners structure keep flopping around Keep covering smooth possible tack tip iron three intervals around periphery structure being covered covering tacked pro ceed seal covering structure around entire peripherey Use wad tissue press covering down adhesive cools 3 shrink covering tight set iron surface material glide back forth over entire area press down iron necessary covering can pressed tight surface using toilet tissue 4 finish wing-tip nose cowl etc has compound curves pull excess material applying heat surface heat will make pliable curvature can matched using tip iron press covering go Work way around curvature until wrinkles worked out Avoid usual temptation turn iron up higher August1976 35 Ace All-Star biplane illustrates use plastic enamel over molded polystyrene foam wings photographer purposely highlighted surface bring out texture foam foam can filled water-thinned white gluebui does add some weight Mylar tapes numerals Monokote stars here continued page 95 add nice touch otherwise plain plastic film covered wing Plain jobs can nice also can let imagination run riot Finishing Touch/Marks continued page 35 following applies covering sheeted areas such fuselage panels sheeted wings like 5 Lay out cut covering open structures Lay covering place work out bit air can beneath covering Bond cov ering center panel first iron toward edges panel allow ing air escape under material go sounds easier really isit extremely difficult avoid cap tured bubbles occurs just cant get rid prick bubble pin center iron air out heat gun does better job Use wad tissue bit cloth work air out cause covering bond Trim edges excess covering seal cut edges using iron plastic coverings can trimmed using other colors same covering using sticky trim sheets using decals Mylar stick-on numerals vinyl tape like large areas over solid sheeting trimmed best cut away base covering allow slight overlap one-fourth inch Trapped air bubbles real plague placing trim over base coat case base covering should pricked pin throughout area overlap permit air escape Editors Note September issue Mr Marks continues series cover ing finishes ADVERTISERS INDEX Ace Radio Control Inc54 Andrews Aircraft Model Co84 David Andrews CoCover 2 Astro Flight Inc90 Bantam Model Products Corp86 Coverite88 Cox Hobbies96 Cover 3 Cumberland Press82 Du-Bro Products Inc81 Dynatek91 EK-logictrol93 Enon Beach Camping91 J T Finley Company 82 Flyline Models94 Fox Mfg Company84 Carl Goldberg Models26 Grish Brothers93 Midwest Products Company. 83 87 Peck-Polymers89 Polks Hobby Dept Stores91 RSSystems85 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc92 Tyro Model & Supply96 VI Products89 Richard Wilkens92 Williams Brothers92 World EnginesBack Cover FULL-SIZE PLANS No 1 53Cerberus$475 RC 60-powered Pattern job retracts advanced features No 154MJ2Tempete$350 CL scale model famous homebuilt motor control sport 25 No 155Tellipsoar$1000 RC Standard Class sailplane wins stand-out performance No 156Free Spirit$400 FF Classes A&B combines excellent power/glide performance No1571935 Wakefield Winner$275 rubber power top job its day will delight old-timer No 100 No 101 No 102 No 103 No 104 No105 No107 No 108 No 109 No 110 No 111 No 112 No 113 No 114 No 116 No 117 No 118 No 119 No 120 No 121 No 122 No 123 No 124 No 125 No 126 No 127 No 129 No 130 No 131 No 134 No 135 No 136 No 137 No 138 No 139 No 140 No 141 No 142 No 143 No 144 No 145 No 146 No 147 No 148 No 149 No 150 No 151 No 152 Hinnants F-b ultimate maneuverability smoothness 60 Pattern job han $450 Short Seamew 40-powered Claun Carrier model good prototype lends itneif innovations $300 French Wench Free Flight Classes 1 /2A 049 051 fully tented denign $225 Kioud King 15-19 RC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder $225 Harold Ruarks Sportsman RC cabin job pretty nmooth lines 40 powered full-houne $450 Aeronca K 24 wingspan rubber Indoor Scale old-time lightplane Its done 90 secondn $200 Electric Couldot done Dick Sarpolus Astro 25 RC job performs patterns $375 Bill Fuoris Quarter Midget House Balna design modifications faster times $300 Zipper latest CL Scale Racers John Kdsdonk job wunt racing fann $175 Max-a-Million fleet free flights problem good A/B FAI $375 Sneat Sport RC glider simple job can flown engine $275 cessna 150 Acrobat Step up Half-A CL jobs 09-powered semi-profile easy build $275 Ernie Violects OH comet CL Scale 1974 Nats first-place winner classic twin $900 Electro-Lice Hal Covers contest-type free flight VTOsHysork electric motor $150 Novice simple beginners A-t Nordic constructed entirely sheet balsa $150 GollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Four Beginners Too basic RC trainer 09 15s rudder elevator motor controls $300 cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake $450 Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s $300 Hot Wood Twice Nats winner Rocket all-balsa Jetes-powered job $100 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer $100 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Time $175 Hooptee Mk Ill John Kiludonks CL Rat Racer involves latent state-of-the-art $175 BAc Drone Astro- 10 electric-powered 80 scale RC powered Glider $400 Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor tSs $275 Altair Class A-B Free Flight conversion data other classes $400 Gee Bee Model Y 40-powered RC stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nats first $400 Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team $275 Fieseler Scorch RC scale model 23-45 5-channel has both slots flaps $400 Ambivalent RC assist FF 29-352 chan. can converted sport $400 candle Wind Half-A free flight competition type offers looks performance $300 Jaguar FAI 15 Combat English champ offers different configuration $225 Nicuport Monoplane Another Hannan cutie CO2 indoor/outdoor Brown single twin $150 Blackburn Monoplane RC Scale rendition history-maker wheels floats 40 engine $450 Eagle CL holder Sr 1 /2A Proto Speed records Uses Con 049 $175 Sweepo rubber winning Coupe dHivercan also flown Unlimited $275 Shark RC conversion JETCO Shark coupled flaps elevators 45-60 $525 Japanese Myrt CL Carrier Class II model has extremely clean design Rossi 60 $275 QuickSilver RC 1/2A Pylon Racer incorporates latest tuchnipues $200 B-i 5 USAF bomber full house Ace foam wings Stable $275 BumbleBee Mk II Foam wing AMA fast-combat saves time cost $450 Comedian RC fun-fly aerobatic biplane good looker 40 60 $400 cardinal Sinner CL stunter 35 engines Detroiter type Very competiriun $375 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 Circle numbers plans wish order- 100 104105107108 113114 101102103 109110111112 116117118119 122123124125126 131134135 120121 127129130 136137138139141 147148149 142143144145146 150151152153 Please print carefully Enclosed $ 154155156157 NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 August1976 95
Edition: Model Aviation - 1976/08
Page Numbers: 32, 33, 34, 35, 95
The finishir Touch materials methods choose wayand go first series author sheds some much-needed light RC CL considerations OVER THE PAST 30 years model building have materials introduced covering finishing models popular easiest finish time became active mod eler Silkspan like tea-bag paper larger models used silk Dope finish used period 1948 Up time nitrate dope sufficed because models used either gasoline igni tion diesel engines rubber powered Ray Arden introduced glow plug engine late 1940s now familiar glow fuel containing alcohol nitromethane came being Nitrate dope no longer suitable began use butyrate dope Butyrate dope used full scale fabric-covered aircraft because fire resistant nitrate dope has virtue being hot fuel proof appropriately hot fuel resistant Modelers experimented numerous paints thought might overcome bad habits dope weaknesses include tendency shrink excessively continuing over period years less desired durability fading pigmen tation time general brittleness effort required apply objection family odor dope fact blushes applied Fred Marks Photos Bill McCaw high humidity Blushing appear ance milky whiteness pigmented dope occurs result trapped moisture air Blushings can overcome addition retarder dope slows its drying moisture can escape enamels like suitable boats car models too heavy use aircraft models modelers think polyester resin new field modeling used boats long ago just too heavy use aircraft models early 1960s Pettit Paints introduced Hobbypoxy first epoxy enamels characterized use catalyst caused basic material ~cure~ harden opposed use solvents must evaporate dope other paints Thus epoxy enamels shrink upon curing could also purchase epoxy enamels local hardware store Although no inherent reason dope contain low pigmentation epoxy automotive paints contain greater pigmentation thus affect quicker coverage epoxy paints some ex tent now suffer particular prob lemcompatibility Before final finish can applied model other molded fiberglass plastic structure covering model must filled provide smooth base final finish Pigmented finishes entirely too heavy expensive use purpose Thus filler materials different finish material must used leads problems compatibility An early experience epoxy enamels 1963 will illustrate point Falcon 56 covered silk usual weave sealed using butyrate dope instructed required time per mitted elapse before next step appli cation filler filler primer used epoxies akin automobile primer heavy filler hard sand unbelievable pro vided beautifully smooth base should also note Falcon 56 has open wing structure vs being sheeted job sanding extemely difficult base coat epoxy paint ap plied permitted harden thoroughly before masked off trim applied trim coat Imagine chagrin entire base color filler came up tape tried procedure once 32 Model Aviation before giving up Obviously work needed epoxies did fade use because people per severed recall remarks about hav ing beautifully shiny 400 grit finish because also took quite some time cure seemed attract dust manufacturers epoxy paints worked solve such problems modelers began discover acrylic lacquer acrylic enamels used automobiles handle quite like dope much less expensive acrylic lacquer has greater tendency brittleness extent imperative acrylic lacquers have plasticizer added Acrylic enamels other hand too flexible soft hand rubbing unless rather expensive hardener added acrylics particularly easy handle spray gun produce truly beautiful finish few pigmented coats same time plastic covering ma terials such Monokote almost seemed sweep field quick covering requires minimum efTort produce pretty model couldnt beat ever have look plastic rather deep rich appearance paint finish difficult apply Left ever-popular Ranger 42 has its foam surfaces transformed metallic-like sheen application Kromekote plastic film requires low heat setting iron Right Sequence pictures shows covering using plastic filmSolar Film case picture dust being removed structure means tack-rag covering film sure cut material bit oversizeand remember adhesive side goes toward structure lay out section cut Using sealing iron illustratedand sure read directions carefully come filmtack film periphery structure covered Its cinch Once covering tacked place bond thoroughly around periphery tip easily covered because care mate rials can worked around compound curves Although heating iron can used di rected shrink covering heat gun illus trated avoids chance scratching film does much faster job August1976 33 Finishing Touch complex compound curves con cavity present naturally didnt satisI needs purist still have problem wrinkling structure dries out winter months wrinkles can quickly removed reheating Because limitations modelers time heat shrinkable plastic coverings became almost accepted fact shop intro duction paintable versions overcame first above criticisms early 1970s engine size power available doubled over 1960 era RC aircraft model weigh&1 six pounds 1960 con sidered heavy norm competi tion radio control aircraft 1975 eight nine pounds control-line freeflight aircraft models weight still important ever However RC model control-line scale models began make use finish materials previously suitable boats cars par ticular use polyester resin epoxy glues sealer filler completely sheeted models no other covering came popular can simply brush two coats thinned resin epoxy glue sand glass-like consistency spray brush pigmented color coats method still presents some compatibility problems can quite brittle Thus some have introduced use extremely lightweight fiberglass cloth bonded place resin epoxy prevent cracking splitting Finally characteristics epoxy enamels have improved significantly achievement much shorter cure times better fillers primers greater flexibility recent introduction called Super Coverite heat shrinkable thermoplastic adhesive backed covering has finish coats already place Most preceding intended use wood fiberglass plastic models Molded polystyrene foam models primar ily aircraft models have become quite pop ular smaller sizes will ac cept materials contain sol vent because solvents also dissolve foam Thus either necessary seal foam base coat thinned white glue epoxy enamel simply apply light coat enamel designed plastic leads us point beginner faced confusing array possibilities finishing model experienced modeler faced finding way determine usefulness numerous new paints cover ings crop up year promising overcome weakness previous materials Select Use Finishing Materials Over own modeling career Ive used just about technique discussed earlier Some worked well others Ive used have seen used others know well have built some models well done least thought others colleagues charged obviously done frozen mop thing can tell reader abso lute fact quality finished model 90 percent function amount effort put job have learned hard vay can tell what isnt compatible job ultimate almost entirely function patience willingness work illustrate point beautifully finished models Ive ever seen Viper Dario Brisi ghelli won best finish award 1972 Toledo show relatively simple finishthe model balsa sheet sealer filler polyester resin very simple However finish consisted ten coats white dope base b ten coats trim color dope orange brown followed c ten coats clear dope model sanded number 600 dry paper between coat wiped down Prep-Sol between coats final clear hand rubbed waxed Are willing put kind effort would look simpler ways simpler ways few will produce kind finish What best needs depends model will first tackle suspect readers will encounter As space permits others will covered shall present info later issues Having done will able make appropriate selection basic needs Beginning Finish good finish whether simplest complex starts prepara tion surface shall assume have well constructed model neither warped nor poorly put together poorly prepared surface always shows up final finish errors cannot covered up paint procedure follows pertains specifically wood models Much follows naturally re quired finishing fiberglass plastic models As mentioned earlier styrofoam models required different technique 1 After blocks structure have carved sanded shape model considered ready finish rough sand entire model using first No 180 No 200 sandpaper first find necessary shape structure use paper coarse No 80 gently 2 Sand model over again 34 Model Aviation Although painted-on finishes also extremely popular Sig Kadet covered trimmed heat-shrinkable film typical shiny colored finishes result film using No 320 wet-or-dry paper black kind until smooth can get 3 point ding marks structure picked up during build ing will apparent can removed filling first wetting indented area water apply heat iron cause wood swell back its original shape Re-sand areas until smooth using number 320 paper Note stage finish work should done wet-or-dry paper 4 Any dings well cracks gaps etc werent correctable step 3 should filled using plastic wood Dap vinyl wood filler vinyl spackle hardware store Hobbypoxy Stuff automotive filler best automotive fillers called Green Stuff use mixture epoxy polyester resin balsa dust micro-balloons Note Never use epoxy micro-balloons polyester resin put over filler because resin will cure properly area 5 After filled areas have dried cured completely sand areas again No 320 paper sand entire model No 400 paper preferable use sanding blocks either commercially made homemade finish sanding order insure uniformity avoid having low high areas completion step use vacuum cleaner remove dust model go over struc ture lightly damp rag remove remaining dust 6 Use damp rag sponge dampen soak structure brings up nap wood causes sanding ridges rise After structure has dried resand No 400 remove nap ridges struc ture now ready finish steps One-Step Finish heat shrinkable polyester plastic covering such Solar Film Super Mono kote Super Coverite Top Cote like used can now applied No filler such dope etc should applied structure because heat required apply above coverings will cause sealer blister Just sure surface cleaned thoroughly dust proceed minimum tools required razor blade fresh X-Acto blade electric iron felt-tip pen small sealing iron such Sealectro heat gun such sold Top Flite aid doing professional job following steps apply Taken part Cover Super Monokote Top Flite Models 1 Place covering table backing side up backing usually clear plastic no adhesive adhesive coverings dry until heated iron However Top Cote Trim Monokote adhesive tacky Mark covering about inch wider narrow side two inches longer side example wing panel fuselage panel cut out sheet covering open structures fol lowing steps apply 2 Remove backing lay covering structure covered adhesive side toward structure forget side touch heated iron corner iron will stick adhesive side leads us point adhesive seeps out around joints sticks iron can removed dope thinner still stains iron best use 'moms~ good iron Best find used Allow overlap around overlap ends surfaces Try get covering smooth possible before start heat anywhere Set iron point just below melt point plastic adhesive should change color become quite sticky Now tack covering corners structure keep flopping around Keep covering smooth possible tack tip iron three intervals around periphery structure being covered covering tacked pro ceed seal covering structure around entire peripherey Use wad tissue press covering down adhesive cools 3 shrink covering tight set iron surface material glide back forth over entire area press down iron necessary covering can pressed tight surface using toilet tissue 4 finish wing-tip nose cowl etc has compound curves pull excess material applying heat surface heat will make pliable curvature can matched using tip iron press covering go Work way around curvature until wrinkles worked out Avoid usual temptation turn iron up higher August1976 35 Ace All-Star biplane illustrates use plastic enamel over molded polystyrene foam wings photographer purposely highlighted surface bring out texture foam foam can filled water-thinned white gluebui does add some weight Mylar tapes numerals Monokote stars here continued page 95 add nice touch otherwise plain plastic film covered wing Plain jobs can nice also can let imagination run riot Finishing Touch/Marks continued page 35 following applies covering sheeted areas such fuselage panels sheeted wings like 5 Lay out cut covering open structures Lay covering place work out bit air can beneath covering Bond cov ering center panel first iron toward edges panel allow ing air escape under material go sounds easier really isit extremely difficult avoid cap tured bubbles occurs just cant get rid prick bubble pin center iron air out heat gun does better job Use wad tissue bit cloth work air out cause covering bond Trim edges excess covering seal cut edges using iron plastic coverings can trimmed using other colors same covering using sticky trim sheets using decals Mylar stick-on numerals vinyl tape like large areas over solid sheeting trimmed best cut away base covering allow slight overlap one-fourth inch Trapped air bubbles real plague placing trim over base coat case base covering should pricked pin throughout area overlap permit air escape Editors Note September issue Mr Marks continues series cover ing finishes ADVERTISERS INDEX Ace Radio Control Inc54 Andrews Aircraft Model Co84 David Andrews CoCover 2 Astro Flight Inc90 Bantam Model Products Corp86 Coverite88 Cox Hobbies96 Cover 3 Cumberland Press82 Du-Bro Products Inc81 Dynatek91 EK-logictrol93 Enon Beach Camping91 J T Finley Company 82 Flyline Models94 Fox Mfg Company84 Carl Goldberg Models26 Grish Brothers93 Midwest Products Company. 83 87 Peck-Polymers89 Polks Hobby Dept Stores91 RSSystems85 Semco Model Engineering80 Sig Mfg Company1 Sterling Models Inc92 Tyro Model & Supply96 VI Products89 Richard Wilkens92 Williams Brothers92 World EnginesBack Cover FULL-SIZE PLANS No 1 53Cerberus$475 RC 60-powered Pattern job retracts advanced features No 154MJ2Tempete$350 CL scale model famous homebuilt motor control sport 25 No 155Tellipsoar$1000 RC Standard Class sailplane wins stand-out performance No 156Free Spirit$400 FF Classes A&B combines excellent power/glide performance No1571935 Wakefield Winner$275 rubber power top job its day will delight old-timer No 100 No 101 No 102 No 103 No 104 No105 No107 No 108 No 109 No 110 No 111 No 112 No 113 No 114 No 116 No 117 No 118 No 119 No 120 No 121 No 122 No 123 No 124 No 125 No 126 No 127 No 129 No 130 No 131 No 134 No 135 No 136 No 137 No 138 No 139 No 140 No 141 No 142 No 143 No 144 No 145 No 146 No 147 No 148 No 149 No 150 No 151 No 152 Hinnants F-b ultimate maneuverability smoothness 60 Pattern job han $450 Short Seamew 40-powered Claun Carrier model good prototype lends itneif innovations $300 French Wench Free Flight Classes 1 /2A 049 051 fully tented denign $225 Kioud King 15-19 RC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design either rubber tail wagger pulse rudder $225 Harold Ruarks Sportsman RC cabin job pretty nmooth lines 40 powered full-houne $450 Aeronca K 24 wingspan rubber Indoor Scale old-time lightplane Its done 90 secondn $200 Electric Couldot done Dick Sarpolus Astro 25 RC job performs patterns $375 Bill Fuoris Quarter Midget House Balna design modifications faster times $300 Zipper latest CL Scale Racers John Kdsdonk job wunt racing fann $175 Max-a-Million fleet free flights problem good A/B FAI $375 Sneat Sport RC glider simple job can flown engine $275 cessna 150 Acrobat Step up Half-A CL jobs 09-powered semi-profile easy build $275 Ernie Violects OH comet CL Scale 1974 Nats first-place winner classic twin $900 Electro-Lice Hal Covers contest-type free flight VTOsHysork electric motor $150 Novice simple beginners A-t Nordic constructed entirely sheet balsa $150 GollyGeeWhiz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Four Beginners Too basic RC trainer 09 15s rudder elevator motor controls $300 cathexis Dave Parsons FAI FF has auto-elevator rudder prop brake $450 Gremlin Sturdy aerobatic RC biplane flies well 35s up 60s $300 Hot Wood Twice Nats winner Rocket all-balsa Jetes-powered job $100 4-Bits 40-powered RC 500 Club Racer has winning ways Good sport too $400 Semi-Pro Contest-winning HL glider has pop-up tail dethermalizer $100 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Time $175 Hooptee Mk Ill John Kiludonks CL Rat Racer involves latent state-of-the-art $175 BAc Drone Astro- 10 electric-powered 80 scale RC powered Glider $400 Rebel Update famed deBolt RC kit Rudder/Elevator/Enginefor tSs $275 Altair Class A-B Free Flight conversion data other classes $400 Gee Bee Model Y 40-powered RC stand-off scale great old-time racers $500 Callisto superb Standard Class RC sailplane also took Nats first $400 Hyperion Mk V Don Chanceys classic Nordic A-2 competed US team $275 Fieseler Scorch RC scale model 23-45 5-channel has both slots flaps $400 Ambivalent RC assist FF 29-352 chan. can converted sport $400 candle Wind Half-A free flight competition type offers looks performance $300 Jaguar FAI 15 Combat English champ offers different configuration $225 Nicuport Monoplane Another Hannan cutie CO2 indoor/outdoor Brown single twin $150 Blackburn Monoplane RC Scale rendition history-maker wheels floats 40 engine $450 Eagle CL holder Sr 1 /2A Proto Speed records Uses Con 049 $175 Sweepo rubber winning Coupe dHivercan also flown Unlimited $275 Shark RC conversion JETCO Shark coupled flaps elevators 45-60 $525 Japanese Myrt CL Carrier Class II model has extremely clean design Rossi 60 $275 QuickSilver RC 1/2A Pylon Racer incorporates latest tuchnipues $200 B-i 5 USAF bomber full house Ace foam wings Stable $275 BumbleBee Mk II Foam wing AMA fast-combat saves time cost $450 Comedian RC fun-fly aerobatic biplane good looker 40 60 $400 cardinal Sinner CL stunter 35 engines Detroiter type Very competiriun $375 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Fox RC assist FF version 1940 Old-Timer 19 ignition 09 glow $425 Circle numbers plans wish order- 100 104105107108 113114 101102103 109110111112 116117118119 122123124125126 131134135 120121 127129130 136137138139141 147148149 142143144145146 150151152153 Please print carefully Enclosed $ 154155156157 NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 August1976 95