Control Line: Scale

CONTROL LINE SCALE 11111 1t-iw~ II rwi n a rd BUILDING LIGHT main subject last months column John Lickley Napa CA explored ways reduce Scale models weight reducing its overall strength month Ill continue some Johns ideas finishing great Scale project finishing system John uses old dope-and-silkspan method necessary talc-and-dope filler coat After models construction completed has planked first step seal surfaces coat two clear dope thoroughly dry remove roughness light sanding Two-hundred grit sandpaper would probably well point sanded dope thoroughly dry should produce powderlike residue dope dry sanding will difficult sandpaper will clog up quickly gumlike residue Drying times vary different types dope paint careful best bets would follow manufacturers instructions wait little longer especially true have applied multiple coats paint Keep mind layers dope applied drying time increases John uses Sig dope silkspan filler initial steps finishing procedure second step John still thinking about keeping weight down cover planked surfaces 00 lightweight silkspan open-bay areas such elevators rudder other control surfaces GM medium-weight silkspan brush couple coats clear dope After silkspan place dope has thoroughly dried very light sanding can done followed filler coat Only time John suggests filler coat appropriately thinned sprayed fill silkspan weave more-even overall coating dry filler can sanded off 3 20-400 grit sandpaper such 3MTM TRI-M-ITE necessary additional coats filler can applied sanded object obtain smoothest possible finish least amount filler satisfied filler coat finish seal filler sprayed-on coat clear Spray model silver dope show flaws models surface dry silver sanded 600-grit wet-ordry paper However instead using water sanding silver coat John uses product sold automotive paint stores called Wax Grease Remover PPG-DX3 30 John notes product has quick evaporation rate cuts finish quickly keeps sandpaper sharp longer less clogging used water satisfied have removed flaws added appropriate details such access hatches panel lines etc youre ready color application color scheme depends upon type model civilian airplane colors available hobby paint suppliers model military type can attempt mix own colors John suggests use some ready-mixed CHEMICAL COMPATIBILITY OF COMMON FINISHING Polyurethane Acrylic Enamel Epoxy Enamel Alkyd Enamel Acryl ic Lacquer Butyrate Dope Nitrate Dope Aero Gloss Dope Dupont 305 Poly Resin Vinyl Spackle OVER Vinyl Spackle Poly Resin Dupont 305 Aero Gloss Dope Nitrate Dope Butyrate Dope Acrylic Lacquer Alkyd Enamel Epoxy Enamel Acrylic Enamel Polyurethane MATERIALS CNC CCC CNC CCC CCC CNC CNC CNC CNC CNC CNC CCCCCC CCCCCC NCCCCC CNCCCC CCCCCC NNCCCC NCNCCC NCNNCN NCNCCC NCNNCN NCNCCC CC CC CC CC cc CC CC NN CC CN CC 126 Model Aviation Naccarato Black Sheep Squadron shows Profile Kawasaki Ki-61 Hien Sig Twister kit ST 46 power silk-and-dope finish Naccarato photo Cliff Bumpuss Mansfield OH great-looking Stearman spans 48 inches weighs about five pounds Bumpus photo military colors provided Perfect Paints paints come quite assortment regular camouflage colors matched Federal Standard numbers require two sprayed-on coats get good coverage camouflage paints offered Perfect Paints commonly used RAF Royal Air Force RCAF USN USAAF Germany Japan John hopes ideas has presented keeping models weight down approach finishing will provide lighter model finer-looking aircraft better craftsmanship qualityone can enjoy flying years Compatibility While discussing finishing techniques seems appropriate visit subject perhaps problem compatibility finishing materials may wonder undercoat compatible particular finishing paint column has touched subject past August 1993 new readers might benefit information table included shows some most-common finishing materials used building Scale models chart presented found Probable Cause newsletter Rocky Mountain Aeromodelers Using table very easy C column indicates combination materials compatible N means combination compatible Vinyl spackle compatible top polyester resin Find vinyl spackle over section table read down polyester resin under section table Compatibility shown C intersection two Vinyl spackle compatible applied underneath polyester resin Find vinyl spackle under section read across polyester resin over section N intersection two materials Take care choosing finishing materials mistake can costly may take great amount effort correct easy access make copy table paste piece cardboard keep handy another tool workshop About Stearman Photo greatlooking model 67 year-old Cliff Bumpus Mansfield Ohio aircraft scratch-built has 48-inch span weighs about five pounds has working struts lights rigging also features handformed aluminum cowling fuselage panels did original Stearman unique thing about model engine dummy Burgess M-5 controlled J Roberts three-line system metal work attention detail engine make attractive model Help Wanted recent letter subsequent telephone conversation John Brodak Brodaks Distributing Co Inc supplier Control Line CL models supplies noted would like produce two three Scale CL kits near future realizes CL Scale modelers scratch-build also feels would like build kitsespecially new CL Scale want try event first time However problem John doesnt know model subjects produce come Drop line address top column let know airplane would like see CL Scale kit form Please keep mind subject should have decent moments size would fly well new model subject nothing wrong P-5 1 P-40 P 47 number kits already available great airplanes subject John Brodak noticed catalog supplier Perfect Paints mentioned above John Lickleys ideas building light new 70-plus-page Brodak catalog can obtained sending $3 John 100 Park Ave Carmichaels PA 15320 Please send ideas notice upcoming CL Scale events contest reports especially photos CL Scale activity address very top column 1998 127