CONTROL LINE AEROBATICS Last month mentioned possibility having consider altemative paints because new govemment environmental regulations premature predict will seffle right now quite few entrepreneurs process developing new products such water-based epoxy sprays wish knew whole process going know still have problems old materials thats what Id like share Ive seen mentioned several authoritative model sources acrylic lacquer completely compatible dope Id have say yes no problem arises differences way two materials dry Dope dries outside acrylic dries inside out two mixed layers potential disaster exists example chose use trim color dope because some over acrylic base color looked okay start airbrushed rather dry soit looked acceptable proceeded acrylic clear-coat things happened edges dope floated after clear flashed Weeks later after paint plenty time harden sanded retouched edges floated time lair-brushed clear hoping remedy situation No such luck Although clear relatively dry dope softened again edge moral story go way through color dope use acrylic clear switch acrylic color clear What contributes floating creeping softening acrylic layer undemeath dope situation must avoided thinners soften through layers overcoat applied top layer starts dry shrink undemeath second third layer softened top layer pulls second layer breaking adhesion floating edge youre lucky slight pull happens dope trim middle two acrylic colors Also shot color abit wet youve ever seen crinide finish can just imagine what hadI hour away finishing color model thing could think wipe trim color dope off thinner pure desperation partI didnt remove masking took off failed dope down blocking coat re-sprayed dope reason worked second time wiped off trim also found softened acrylic overspray Im little sloppy removed blocking coat dope now condition everything worked bottom line worth repeating mix dope acrylic colors Use either acrylic color dope color wont have problems Acrylic overcoats clear such Du Pont 380S will work quite well Im subject paint let pass few other points may helpful clear coats can add much weight quickly unless youre very careful acrylics dont need anywhere near amount unthinned material dope example common use two quarts Sig Lite Coat thin another two quarts yield gallon material spray several stages acrylics dont need much Using touch-up gun can get eight 10 ounces basic material thinned approximately 1 parts thinner part clear Use reliable Du Pont 36085 Ive tried less thinner works well put too much clear thinner up 2 1 what Du Pont recommends seems cut adhesion down bit ambient temperature down say below 700F really thin paint will tend run Regarding adhesion sure wipe model down Prepsol like product just prior applying clear coats ensure surface free dust oils etc can accumulate air howl apply clearits nothing unusual its gleaned sources does work After trim ink etc model clean airbrush clear ink lines trim edges surface edges After thats time dry use touch-up gun give model good coat clear Thats set Following good drying periodat least weekI sand trim edges knock down lips Clean model again 110 Model Aviation Dave Midgley son Daves Mirror Image ST 51powered Cardinal superb craftsman Dave makes own carbon pipes Kim Webbys Cap 21 won CL Aerobatics Scale New Absolutely gorgeous color combination Dave Midgley model Zealands last Nats OS 50 Hell CL World Champs well-executed Carnivore ST 51 pipe shoot final clear Ive also mentioned blocking coat should define better practical terms color used give uniform surface color final color will uniform After working sanding sealers can shades something required provide uniformity also show some surface flaws can coirected years used Sig silver concentrated removing some clear worked well show finish flaws sealed surface also covered extremely well kept thin light Recently Ive using another method recommended Bill Werwage Randy Smith Instead Sig Silver Ive using Sig Polar Gray color has very good coverage sands surprisingly well also dries glossy surface sets apart silver like better silver another tip Ive heard about Polar Gray havent tried should work Polar Gray has superior coverage attribute exploited unusual way Contrasting greys coverage poor coverage white produces almost opposites trick mix two combining part grey two parts white brightness white diminished slightly uniformity depth coverage improves significantly Thats enough about paint lets get magic propellers some time Ive trouble getting two blade composite props work well thought should hot weather did everything everyone told repitched props constant pitch changed tip shape changed diameter improvements nothing really satisfied general problem line tension diminished above 450 three-bladed props Look pitch profiles thats solution found Most standard props decrease pitch outer stations outer third blade repitching specific pitchfour examplebut maintaining way tip did work better day really lost pondering things just werent working remembered conversation Id Bill Werwage long time ago mentioned tweaking tips would cure tension up top went profile outer two stations set 42 instead constant four-inch pitch flew prop change dramatic speed line tensions constant Since Ive changed base pitch kept tips pitched slightly approach has worked extremely well has probably worked because tips thin depitch slightly under high rpm slightly increased pitch tips compensates effect some degree know works encourage repitch try recipe perfect control-line airplanes Take 75 years building flying control-line airplanes Add best engineering plans fully illustrated step-by-step instructions Use finest materials complete hardware kit Cut piece very dose tolerances Add full set decals Lightning Streak Buster Brodaks 100 Park Ave ichaels PA 15320 Call now 412 2726 B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 November1994 111 Flying like meant Only $4495 Lightning Streak Buster draw ing raves builders flyers across country - Find out designs youve teen waiting Order Lightning Streak part Fun Series Buster part Nostalgia Series local hobby shop order directly Brodaks order Brodaks Catalog Number Four prices complete pay shipping ship immediately
Edition: Model Aviation - 1994/11
Page Numbers: 110, 111
CONTROL LINE AEROBATICS Last month mentioned possibility having consider altemative paints because new govemment environmental regulations premature predict will seffle right now quite few entrepreneurs process developing new products such water-based epoxy sprays wish knew whole process going know still have problems old materials thats what Id like share Ive seen mentioned several authoritative model sources acrylic lacquer completely compatible dope Id have say yes no problem arises differences way two materials dry Dope dries outside acrylic dries inside out two mixed layers potential disaster exists example chose use trim color dope because some over acrylic base color looked okay start airbrushed rather dry soit looked acceptable proceeded acrylic clear-coat things happened edges dope floated after clear flashed Weeks later after paint plenty time harden sanded retouched edges floated time lair-brushed clear hoping remedy situation No such luck Although clear relatively dry dope softened again edge moral story go way through color dope use acrylic clear switch acrylic color clear What contributes floating creeping softening acrylic layer undemeath dope situation must avoided thinners soften through layers overcoat applied top layer starts dry shrink undemeath second third layer softened top layer pulls second layer breaking adhesion floating edge youre lucky slight pull happens dope trim middle two acrylic colors Also shot color abit wet youve ever seen crinide finish can just imagine what hadI hour away finishing color model thing could think wipe trim color dope off thinner pure desperation partI didnt remove masking took off failed dope down blocking coat re-sprayed dope reason worked second time wiped off trim also found softened acrylic overspray Im little sloppy removed blocking coat dope now condition everything worked bottom line worth repeating mix dope acrylic colors Use either acrylic color dope color wont have problems Acrylic overcoats clear such Du Pont 380S will work quite well Im subject paint let pass few other points may helpful clear coats can add much weight quickly unless youre very careful acrylics dont need anywhere near amount unthinned material dope example common use two quarts Sig Lite Coat thin another two quarts yield gallon material spray several stages acrylics dont need much Using touch-up gun can get eight 10 ounces basic material thinned approximately 1 parts thinner part clear Use reliable Du Pont 36085 Ive tried less thinner works well put too much clear thinner up 2 1 what Du Pont recommends seems cut adhesion down bit ambient temperature down say below 700F really thin paint will tend run Regarding adhesion sure wipe model down Prepsol like product just prior applying clear coats ensure surface free dust oils etc can accumulate air howl apply clearits nothing unusual its gleaned sources does work After trim ink etc model clean airbrush clear ink lines trim edges surface edges After thats time dry use touch-up gun give model good coat clear Thats set Following good drying periodat least weekI sand trim edges knock down lips Clean model again 110 Model Aviation Dave Midgley son Daves Mirror Image ST 51powered Cardinal superb craftsman Dave makes own carbon pipes Kim Webbys Cap 21 won CL Aerobatics Scale New Absolutely gorgeous color combination Dave Midgley model Zealands last Nats OS 50 Hell CL World Champs well-executed Carnivore ST 51 pipe shoot final clear Ive also mentioned blocking coat should define better practical terms color used give uniform surface color final color will uniform After working sanding sealers can shades something required provide uniformity also show some surface flaws can coirected years used Sig silver concentrated removing some clear worked well show finish flaws sealed surface also covered extremely well kept thin light Recently Ive using another method recommended Bill Werwage Randy Smith Instead Sig Silver Ive using Sig Polar Gray color has very good coverage sands surprisingly well also dries glossy surface sets apart silver like better silver another tip Ive heard about Polar Gray havent tried should work Polar Gray has superior coverage attribute exploited unusual way Contrasting greys coverage poor coverage white produces almost opposites trick mix two combining part grey two parts white brightness white diminished slightly uniformity depth coverage improves significantly Thats enough about paint lets get magic propellers some time Ive trouble getting two blade composite props work well thought should hot weather did everything everyone told repitched props constant pitch changed tip shape changed diameter improvements nothing really satisfied general problem line tension diminished above 450 three-bladed props Look pitch profiles thats solution found Most standard props decrease pitch outer stations outer third blade repitching specific pitchfour examplebut maintaining way tip did work better day really lost pondering things just werent working remembered conversation Id Bill Werwage long time ago mentioned tweaking tips would cure tension up top went profile outer two stations set 42 instead constant four-inch pitch flew prop change dramatic speed line tensions constant Since Ive changed base pitch kept tips pitched slightly approach has worked extremely well has probably worked because tips thin depitch slightly under high rpm slightly increased pitch tips compensates effect some degree know works encourage repitch try recipe perfect control-line airplanes Take 75 years building flying control-line airplanes Add best engineering plans fully illustrated step-by-step instructions Use finest materials complete hardware kit Cut piece very dose tolerances Add full set decals Lightning Streak Buster Brodaks 100 Park Ave ichaels PA 15320 Call now 412 2726 B&P Associates Gives Total Flight Line FREEDOM new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 November1994 111 Flying like meant Only $4495 Lightning Streak Buster draw ing raves builders flyers across country - Find out designs youve teen waiting Order Lightning Streak part Fun Series Buster part Nostalgia Series local hobby shop order directly Brodaks order Brodaks Catalog Number Four prices complete pay shipping ship immediately