WHETHER specialty Peanuts controlliners Jumbos Monster RC models will eventually faced problem enlarging 3-view drawings pians Traditional methods have included use grid-lines pro portional dividers pantographs photostats workable has disadvantages grid system involves drawing squares original small plan proportionately larger ones proposed enlargement number ing grid lines can transfer relative locations shapes desired size Unfortunately system relies heavily upon eyeball measuring always precise Proportional dividers draftsmans tools may used transfer point measure ments directly small original drawing directly final size adiustable ratio once correctly set eliminate need ordinary measurements rulers ever number operations involved using scale up plan makes system laborious slow subject errors particularly very large blow ups involved Pantographs operate similar manner proportional dividers involve continuous tracing action stylus duplicated through linkage desired size pencil opposite end device Limitations include lack sufficient travel permit doing really large plan single go problems n aintaining pressure both stylds pencil owing fairly flexible linkage involved Some people evidently still appreciate rather ancient device still being marketed noted source list Photostats doubtless fastest way enlarging plan 3-view also costly especially giant sizes wanted some instances time savings convenience may help justify price well leam few fundamentals process employs camera lens enlarge image project onto sensitized material such film better quality machines employ precision optical ele ments rigid construction vacuum-frames securely hold drawing copied features help minimize possible distor tions improve fidelity enlargement skill operator also key factor course choice materials equipment accurate correctly adjusted certain amount slippage can caused shrinkage stretching wet processing Often experienced operator can anticipate amount change compen sate least some degree positive guarantee success use mylar film dimensionally stable naturally expensive sure explain tolerance requirements beforehand ordering photo stat Some firms will charge higher price extremely close tolerances specified other cost-saving possibilities example some shops offer PMT system produces direct positive print cheaper methods require separate film intermediate negative speaking nega tives money can saved can traced about easily positive prints dont rule out short sure explain advance what needs results can greater economy possibly accurate work Photostat services frequently available blueprint companies some print shops few telephone calls will likely locate such facility area Prices vary widely dont hesitate shop around difference saved can invested building materials handy rotary calculating device available art supply graphic materials firms can quite useful modelers Consisting two cardboard calibrated discs unit can quickly show results size changes need mathematics example wish know what wing chord will tiny 3-view enlarged six feet can simply set dial 72-in mark other span 3-view wing Next measure 3-view wing chord find dimen sion rotary scale disc model size chord may read directly Obviously similar function can performed electronic calculator rotary wheel will never have dead batteries Either system will enable preview such vital items prop clearance wheel diameter etc before going trouble expense making enlargement Opaque projectors represent another optical approach producing large drawings use lens lens sytem reflect small image via mirror usually Onto surface such wall tracing over projected image sheet paper enlarged drawing can produced quite quickly size may easily adjusted changing distance opaque projector projection surface Fine focusing controlled moving lens holder until sharpest image may seen few general guidelines may order regarding devices First quality varies astonishing degree Some really intended toys just barely work opposite extreme some units costly might difficult justify expense average modeler Note may possible use high price spreads school library least worth investigat ing Some medium-price offerings may represent best value casual user optical properties opaque projectors particularly low-priced examples leave great deal desired instance central portion projected image may appear sharper outer edges simple modifica tion can improve condition although introduces another sort limitation card board disc small hole mounted directly front projection lens will increase overall sharpness projected image will exact reduction light intensity works totally dark room compromise may acceptable Experimenting disc hole-size will provide best combination Sometimes efficiency opaque projector may improved changing light bulb bulbs common frosted variety clear type Caution Most projectors specify maximum bulb wattage should exceeded Doing may increase heat output enoughto damage eitherthe copy orthe projector Some units employ special high-output bulbs efficient usual household variety few toy opaque projectors can improved replacing polished metal reflec July 1980 67 actual three-view drawings can reproduced other sizesall smalleron Xerox 9400 Duplicator suit layout B,j S PRQJECTOR projector must besquaretothe screen Project rectangle have drawn measure images sides validate whether set-up true Sides should equal lengths should sides B dont want distorted plans modell tor good quality glass mirror reworking mounts required maintain proper angle Keepingthe mirror lens cleanwill also promote efficiency Lens tissue used eye glasses suitable very soft cloth lightly moistened mild soap water will certain keep fingers away lens mirror surfaces fingerprints can cause perma nent damage wish copy drawing book magazine good idea have Xerox copy drawing made two reasons First prolonged heat exposure may damage publi cation second much easier work single thin sheet paper balance projector thick book addition possible harm publication uneven surface can cause distracting light leaks making projection set-up important image projected squarely relation surface avoid distortion produced angularity sketch shows simple method checking alignment possible mount opaque projector over drawing table permits comfortable working however occasional user amount effort involved making installa tion may excessive Also projection size range may somewhat restricted ceiling height unless interchangeable lenses different throws employed anyone wishing investigate sort custom-built arrangement suggest sending Edmund Scientific Build Opaque Projectors publication mentioned end article conventional opaque projectors size limited two factors size available room fall-off light distance increases Another problem sometimes encoun tered rather limited copy area Thus trying project 3-view original larger machine can seeitmayhaveto done sections rather tricky involves close-matching join areas Fortun ately optical answer problem too anyone neighborhood has Xerox 9400 Duplicator marvelous device can make reductions 98% 74% 65% original size doesnt make drawing small enough fit within opaque projector copy area reduced copy can reduced Best cost very low especially compared photostatic reductions Locally charge ten cents An indirect way achieve results sure very economical long run Camera System Another route plan enlargement involves use camera slide projector respects superior opaque projection especially already own equipment First optical quality lenses utilized almost undoubtedly better Second size original drawing copied becomes much less important reduc ing large originals easily accomplished single-lens reflex type camera strongly suggested Other varieties can employed need compensate parallax film sees through different window eye focusing problems complicate matters Some cameras can focus within foot object copied Others may require either close-up tubes supplementary lenses local photo supply dealer can advise advantages either will copying small drawings cost compara tively low will also prove useful taking close-up photos models Either color slide film regular black white maybe utilized Unless original 3-view color author prefers using black white film such Kodak Plus X film quite tolerant exposure errors low cost easily processed film negatives may mounted regular cardboard plastic metal slide mounts use normal slide projector Incidentally very few opaque projectors have provisions transparencies seem efficient convenient using black white negatives rather positives slides dazzle reduced projecting white-lines-on-black effect projected negative much easier eyes especially during extended tracing sessions important camera square 3-view copied may determined measurements very careful alignment view-finder margins single-lens reflex camera Use tripod table Continued page 125 68 Model Aviation Three tools aid drafting scaled-up -down drawing Proportional wheel proportional dividers electronic calculator Any devices eliminates tedious math calculations Specimen opaque projectors left Postoacope Display Artists Projector toy projector no brand name Rainbow Crafts opaque/ transparency toy projector key elements system opiicai enlarging ingle lens reflex camera slide projector commonly available equipment larger 21/4 square format good too Z LEN Z5OL AEROBATIC QUARTER SCALE MODEL n0 S C ENGINE 90 WINGSPAN 80 $4995 CONSTRUCTION Foam WingBalsa Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3/16 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 CHEROKEE DRIVE CANTON OH 44720 having convivial sip two owner remarked absence RC fliers loyal band speculated perhaps due large volume mail-ordering doing having own party down post office offer item detract RC modeling get thinking about things hobby dealer means besides just place buy little low-profit goodies cant get elsewhere cheaper Persevere start new model project week plan make FAG AMA Nats take neighbor kid flying field Saturday morning patient humble colum nist slow answering mail Its time inspired building Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 SAFETY/ PRESTON continued page 60 surgery stainless steel pin wood nylon prop injury would probably have severe editor goes compare racing 40 glass prop Skilsaw table saw think thats far wrong Remember toys can dangerous should command great deal respect care Although same league broken bones stainless pins think should warned another hazard associated least brand fiberglass prop Sharp edges Radio Flyer newsletter Western Michigan Radio Aircraft Flyers editor Rod Osbeck contained copy letter glass-reinforced prop manufacturer its February issue Appar ently seven club members received lacerations hand have considered nasty least required sutures less three month period June July August 1979 clear news letter article whether injuries sustained during normal contact prop during starting through unintentional contact engine running friend DCRC recently showed us some lacerations received such propeller during hand flipping starting operaton So alert intending use fiberglass prop next model examine edges blades have sharp edges take few swipes sanding block Needless say prop should rebalanced after such operation John D Preston 7012 Elvira Court Falls Church VA 22042 THREE-VI EW/HANNAN continued page 68 steadiness well cable-release shutter Stopping lens opening way down largest number such f/16 f/22 assures optimum sharpness Lighting may sunlight outdoors pair lamps provide illumination left right-hand side indoors again value singlelens-reflex camera will apparent since possible glare shadow condition will readily apparent through viewfinder Arriving suitable exposure may involve trial attempt two camera has built light-meter automatic exposure control may enable accep table results achieved first time However bracketing exposures using slightly dif ferent ones will increase chances good results Keeping records camera settings will enable repeat predictably during future copying sessions camera method also easy photograph number different 3-views set up thus anticipating possible future project requirements negatives mounted slides take very little storage space easily cataloged retrieval Sure beats trying find favorite drawing stack magazines Either camera/projector opaque projector system may also used aircraft photoXECUTI VE * 49 Wingspan * Wing Chord 12 * Wing Area 588 sq * Full symmetrical section * 41 Fuselage overall * Weight 4-112 lbs * Engine size 40 up * Takes 4-Channel RIC novice flyer can handle expert will enioy design gentle forgiving yet offers experienced inverted hands-off control knifeedge flight rolls spins aircraft will astound pleasure build parts fit fall together Accurate plans assembles quickly Gets air fun Its ship will last proud woodwork See DEALER INQUIRIES INVITED NY 11701 SIGN CORP July 1980 125 iting advertisers mention road about Model Aviation summary use optical sizing can save time minimize tedious computations offer shortcut production new designs add useful items modelers bag tricks Source List Proportional dividers scaling devices proportion wheels may obtained engineering equipment suppliers large art supply outlets Photostats offered some blueprint firms printing establishments Consult tele phone book Yellow Pages listings Camera supply stores can provide information single-lens reflex cameras slide mounts slide projectors Often used equipment avail able reasonable prices some firms offer rental equipment Opaque projectors stocked large art supply houses some toy stores may also ordered mail Please note because economic conditions prices availability may have changed since list compiled stamped addressed envelope sent sup pliers should provide current information Edmund Scientific Co 1888 Edscorp Building Barrington NJ 08007 Build Opaque Projectors fferent designs $150 Deluxe Opaque Projector * 80217 6 s 6 copy area two 200-watt bulbs cooling fan $8995 Imported west German Opaque Projector * 72443 5 area 150-watt quartz halogen lamp cooling blower $22995 $150 service handling Edmund Scientific orders Foster-Treat Inc Dept 4500-D Larchmonl NY 10538 Episcope Projector Made Italy Hi-intensity projection bulb 3 3 copy area $1195 plus 95 shipping handling Johnson Smith Company 35075 Automation Drive Ms Clemens MI 48043 Pantograph 25 different ratios # 6882 $795 plus $129 shipping handling Opaque Projector 3 x 4 copy area # 6007 $1095 plus $169 shipping handling graphs well drawings example insignia markings may projected directly upon construction drawings save time improve accuracy duplication Word About Drawings Although bit outside mainstream article Seems appropriate mention subject 3-views general First off high percentage contain errors sort another may have caused faulty reference information faulty perception drafting errors carelessness guess-work Additional distortions sometimes occur during reproduction processes Whether reasons discrepancies will greatly magnified drawings enlarged case sport stand-off type model may unimportant However serious scale model such problems may unacceptable Therefore pays check veracity 3view drawing advance enlarging Com pare length fuselage top view side view etc printed specifications available check against drawing conformity Dont however overlook possi bility typographical other mistakes written information Any inconsistencies need resolved correction perhaps selection alternative 3-view drawing before man-hours have invested enlargements Drawings should also compared photo graphs subject aircraft being careful allow misleading effects perspective unusual lighting photos available better chances arriving correct con clusions Vein Clements long-time scale modeler puts way comparing various drawings accuracy believe photo graphs Benno Sabel expert German technical artist model designer expresses opinion better refer photos technical drawings 3-views Forewarned forearmed Once have enlargement may overlaid drafting vellum tracing paper mylar drafting film basic drafting tools such T-square triangles french curves may employed making clean tracing eliminate free-hand drawing wiggles incorporate needed corrections remains design model structure may seem formidable task first reference published plans similar subjects will help point down path success After have three four such designs under belt may find designing operation satisfying building Powerful Enlarger Projector 400 watts heavy-duty motor fan 6 6 copy area * 6025 $8995 plus $200 shipping handling F 0 Kees Mfg Co Beatrice NB 68310 Postoscope Display Artists Projector Model E 6 6 copy area two 100-watt bulbs Send current price LETTERS continued page 12 correct aileron flutter Spook also suffered lead cant change directions fast aileron can flutter thus dampening flutter Spook now has completely rebuilt freize type ailemns Down thrust has removed wing symmetrical airfoil tail moment has extended 4 inches vertical fin area has reduced thrust wing incidence stabilizer incidence zero degrees George Clapp Central Square NY asked George Clapp fill us 126 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 Introducing Ceverites First Kit Fabulous Dealer write Coerite 420 Babylon Rd Horsham PA 19044 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barklcys TIGER MOTH KIT- $22995* *Cincludes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUAD RAt ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service . Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1980/07
Page Numbers: 66, 67, 68, 125, 126
WHETHER specialty Peanuts controlliners Jumbos Monster RC models will eventually faced problem enlarging 3-view drawings pians Traditional methods have included use grid-lines pro portional dividers pantographs photostats workable has disadvantages grid system involves drawing squares original small plan proportionately larger ones proposed enlargement number ing grid lines can transfer relative locations shapes desired size Unfortunately system relies heavily upon eyeball measuring always precise Proportional dividers draftsmans tools may used transfer point measure ments directly small original drawing directly final size adiustable ratio once correctly set eliminate need ordinary measurements rulers ever number operations involved using scale up plan makes system laborious slow subject errors particularly very large blow ups involved Pantographs operate similar manner proportional dividers involve continuous tracing action stylus duplicated through linkage desired size pencil opposite end device Limitations include lack sufficient travel permit doing really large plan single go problems n aintaining pressure both stylds pencil owing fairly flexible linkage involved Some people evidently still appreciate rather ancient device still being marketed noted source list Photostats doubtless fastest way enlarging plan 3-view also costly especially giant sizes wanted some instances time savings convenience may help justify price well leam few fundamentals process employs camera lens enlarge image project onto sensitized material such film better quality machines employ precision optical ele ments rigid construction vacuum-frames securely hold drawing copied features help minimize possible distor tions improve fidelity enlargement skill operator also key factor course choice materials equipment accurate correctly adjusted certain amount slippage can caused shrinkage stretching wet processing Often experienced operator can anticipate amount change compen sate least some degree positive guarantee success use mylar film dimensionally stable naturally expensive sure explain tolerance requirements beforehand ordering photo stat Some firms will charge higher price extremely close tolerances specified other cost-saving possibilities example some shops offer PMT system produces direct positive print cheaper methods require separate film intermediate negative speaking nega tives money can saved can traced about easily positive prints dont rule out short sure explain advance what needs results can greater economy possibly accurate work Photostat services frequently available blueprint companies some print shops few telephone calls will likely locate such facility area Prices vary widely dont hesitate shop around difference saved can invested building materials handy rotary calculating device available art supply graphic materials firms can quite useful modelers Consisting two cardboard calibrated discs unit can quickly show results size changes need mathematics example wish know what wing chord will tiny 3-view enlarged six feet can simply set dial 72-in mark other span 3-view wing Next measure 3-view wing chord find dimen sion rotary scale disc model size chord may read directly Obviously similar function can performed electronic calculator rotary wheel will never have dead batteries Either system will enable preview such vital items prop clearance wheel diameter etc before going trouble expense making enlargement Opaque projectors represent another optical approach producing large drawings use lens lens sytem reflect small image via mirror usually Onto surface such wall tracing over projected image sheet paper enlarged drawing can produced quite quickly size may easily adjusted changing distance opaque projector projection surface Fine focusing controlled moving lens holder until sharpest image may seen few general guidelines may order regarding devices First quality varies astonishing degree Some really intended toys just barely work opposite extreme some units costly might difficult justify expense average modeler Note may possible use high price spreads school library least worth investigat ing Some medium-price offerings may represent best value casual user optical properties opaque projectors particularly low-priced examples leave great deal desired instance central portion projected image may appear sharper outer edges simple modifica tion can improve condition although introduces another sort limitation card board disc small hole mounted directly front projection lens will increase overall sharpness projected image will exact reduction light intensity works totally dark room compromise may acceptable Experimenting disc hole-size will provide best combination Sometimes efficiency opaque projector may improved changing light bulb bulbs common frosted variety clear type Caution Most projectors specify maximum bulb wattage should exceeded Doing may increase heat output enoughto damage eitherthe copy orthe projector Some units employ special high-output bulbs efficient usual household variety few toy opaque projectors can improved replacing polished metal reflec July 1980 67 actual three-view drawings can reproduced other sizesall smalleron Xerox 9400 Duplicator suit layout B,j S PRQJECTOR projector must besquaretothe screen Project rectangle have drawn measure images sides validate whether set-up true Sides should equal lengths should sides B dont want distorted plans modell tor good quality glass mirror reworking mounts required maintain proper angle Keepingthe mirror lens cleanwill also promote efficiency Lens tissue used eye glasses suitable very soft cloth lightly moistened mild soap water will certain keep fingers away lens mirror surfaces fingerprints can cause perma nent damage wish copy drawing book magazine good idea have Xerox copy drawing made two reasons First prolonged heat exposure may damage publi cation second much easier work single thin sheet paper balance projector thick book addition possible harm publication uneven surface can cause distracting light leaks making projection set-up important image projected squarely relation surface avoid distortion produced angularity sketch shows simple method checking alignment possible mount opaque projector over drawing table permits comfortable working however occasional user amount effort involved making installa tion may excessive Also projection size range may somewhat restricted ceiling height unless interchangeable lenses different throws employed anyone wishing investigate sort custom-built arrangement suggest sending Edmund Scientific Build Opaque Projectors publication mentioned end article conventional opaque projectors size limited two factors size available room fall-off light distance increases Another problem sometimes encoun tered rather limited copy area Thus trying project 3-view original larger machine can seeitmayhaveto done sections rather tricky involves close-matching join areas Fortun ately optical answer problem too anyone neighborhood has Xerox 9400 Duplicator marvelous device can make reductions 98% 74% 65% original size doesnt make drawing small enough fit within opaque projector copy area reduced copy can reduced Best cost very low especially compared photostatic reductions Locally charge ten cents An indirect way achieve results sure very economical long run Camera System Another route plan enlargement involves use camera slide projector respects superior opaque projection especially already own equipment First optical quality lenses utilized almost undoubtedly better Second size original drawing copied becomes much less important reduc ing large originals easily accomplished single-lens reflex type camera strongly suggested Other varieties can employed need compensate parallax film sees through different window eye focusing problems complicate matters Some cameras can focus within foot object copied Others may require either close-up tubes supplementary lenses local photo supply dealer can advise advantages either will copying small drawings cost compara tively low will also prove useful taking close-up photos models Either color slide film regular black white maybe utilized Unless original 3-view color author prefers using black white film such Kodak Plus X film quite tolerant exposure errors low cost easily processed film negatives may mounted regular cardboard plastic metal slide mounts use normal slide projector Incidentally very few opaque projectors have provisions transparencies seem efficient convenient using black white negatives rather positives slides dazzle reduced projecting white-lines-on-black effect projected negative much easier eyes especially during extended tracing sessions important camera square 3-view copied may determined measurements very careful alignment view-finder margins single-lens reflex camera Use tripod table Continued page 125 68 Model Aviation Three tools aid drafting scaled-up -down drawing Proportional wheel proportional dividers electronic calculator Any devices eliminates tedious math calculations Specimen opaque projectors left Postoacope Display Artists Projector toy projector no brand name Rainbow Crafts opaque/ transparency toy projector key elements system opiicai enlarging ingle lens reflex camera slide projector commonly available equipment larger 21/4 square format good too Z LEN Z5OL AEROBATIC QUARTER SCALE MODEL n0 S C ENGINE 90 WINGSPAN 80 $4995 CONSTRUCTION Foam WingBalsa Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3/16 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 CHEROKEE DRIVE CANTON OH 44720 having convivial sip two owner remarked absence RC fliers loyal band speculated perhaps due large volume mail-ordering doing having own party down post office offer item detract RC modeling get thinking about things hobby dealer means besides just place buy little low-profit goodies cant get elsewhere cheaper Persevere start new model project week plan make FAG AMA Nats take neighbor kid flying field Saturday morning patient humble colum nist slow answering mail Its time inspired building Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 SAFETY/ PRESTON continued page 60 surgery stainless steel pin wood nylon prop injury would probably have severe editor goes compare racing 40 glass prop Skilsaw table saw think thats far wrong Remember toys can dangerous should command great deal respect care Although same league broken bones stainless pins think should warned another hazard associated least brand fiberglass prop Sharp edges Radio Flyer newsletter Western Michigan Radio Aircraft Flyers editor Rod Osbeck contained copy letter glass-reinforced prop manufacturer its February issue Appar ently seven club members received lacerations hand have considered nasty least required sutures less three month period June July August 1979 clear news letter article whether injuries sustained during normal contact prop during starting through unintentional contact engine running friend DCRC recently showed us some lacerations received such propeller during hand flipping starting operaton So alert intending use fiberglass prop next model examine edges blades have sharp edges take few swipes sanding block Needless say prop should rebalanced after such operation John D Preston 7012 Elvira Court Falls Church VA 22042 THREE-VI EW/HANNAN continued page 68 steadiness well cable-release shutter Stopping lens opening way down largest number such f/16 f/22 assures optimum sharpness Lighting may sunlight outdoors pair lamps provide illumination left right-hand side indoors again value singlelens-reflex camera will apparent since possible glare shadow condition will readily apparent through viewfinder Arriving suitable exposure may involve trial attempt two camera has built light-meter automatic exposure control may enable accep table results achieved first time However bracketing exposures using slightly dif ferent ones will increase chances good results Keeping records camera settings will enable repeat predictably during future copying sessions camera method also easy photograph number different 3-views set up thus anticipating possible future project requirements negatives mounted slides take very little storage space easily cataloged retrieval Sure beats trying find favorite drawing stack magazines Either camera/projector opaque projector system may also used aircraft photoXECUTI VE * 49 Wingspan * Wing Chord 12 * Wing Area 588 sq * Full symmetrical section * 41 Fuselage overall * Weight 4-112 lbs * Engine size 40 up * Takes 4-Channel RIC novice flyer can handle expert will enioy design gentle forgiving yet offers experienced inverted hands-off control knifeedge flight rolls spins aircraft will astound pleasure build parts fit fall together Accurate plans assembles quickly Gets air fun Its ship will last proud woodwork See DEALER INQUIRIES INVITED NY 11701 SIGN CORP July 1980 125 iting advertisers mention road about Model Aviation summary use optical sizing can save time minimize tedious computations offer shortcut production new designs add useful items modelers bag tricks Source List Proportional dividers scaling devices proportion wheels may obtained engineering equipment suppliers large art supply outlets Photostats offered some blueprint firms printing establishments Consult tele phone book Yellow Pages listings Camera supply stores can provide information single-lens reflex cameras slide mounts slide projectors Often used equipment avail able reasonable prices some firms offer rental equipment Opaque projectors stocked large art supply houses some toy stores may also ordered mail Please note because economic conditions prices availability may have changed since list compiled stamped addressed envelope sent sup pliers should provide current information Edmund Scientific Co 1888 Edscorp Building Barrington NJ 08007 Build Opaque Projectors fferent designs $150 Deluxe Opaque Projector * 80217 6 s 6 copy area two 200-watt bulbs cooling fan $8995 Imported west German Opaque Projector * 72443 5 area 150-watt quartz halogen lamp cooling blower $22995 $150 service handling Edmund Scientific orders Foster-Treat Inc Dept 4500-D Larchmonl NY 10538 Episcope Projector Made Italy Hi-intensity projection bulb 3 3 copy area $1195 plus 95 shipping handling Johnson Smith Company 35075 Automation Drive Ms Clemens MI 48043 Pantograph 25 different ratios # 6882 $795 plus $129 shipping handling Opaque Projector 3 x 4 copy area # 6007 $1095 plus $169 shipping handling graphs well drawings example insignia markings may projected directly upon construction drawings save time improve accuracy duplication Word About Drawings Although bit outside mainstream article Seems appropriate mention subject 3-views general First off high percentage contain errors sort another may have caused faulty reference information faulty perception drafting errors carelessness guess-work Additional distortions sometimes occur during reproduction processes Whether reasons discrepancies will greatly magnified drawings enlarged case sport stand-off type model may unimportant However serious scale model such problems may unacceptable Therefore pays check veracity 3view drawing advance enlarging Com pare length fuselage top view side view etc printed specifications available check against drawing conformity Dont however overlook possi bility typographical other mistakes written information Any inconsistencies need resolved correction perhaps selection alternative 3-view drawing before man-hours have invested enlargements Drawings should also compared photo graphs subject aircraft being careful allow misleading effects perspective unusual lighting photos available better chances arriving correct con clusions Vein Clements long-time scale modeler puts way comparing various drawings accuracy believe photo graphs Benno Sabel expert German technical artist model designer expresses opinion better refer photos technical drawings 3-views Forewarned forearmed Once have enlargement may overlaid drafting vellum tracing paper mylar drafting film basic drafting tools such T-square triangles french curves may employed making clean tracing eliminate free-hand drawing wiggles incorporate needed corrections remains design model structure may seem formidable task first reference published plans similar subjects will help point down path success After have three four such designs under belt may find designing operation satisfying building Powerful Enlarger Projector 400 watts heavy-duty motor fan 6 6 copy area * 6025 $8995 plus $200 shipping handling F 0 Kees Mfg Co Beatrice NB 68310 Postoscope Display Artists Projector Model E 6 6 copy area two 100-watt bulbs Send current price LETTERS continued page 12 correct aileron flutter Spook also suffered lead cant change directions fast aileron can flutter thus dampening flutter Spook now has completely rebuilt freize type ailemns Down thrust has removed wing symmetrical airfoil tail moment has extended 4 inches vertical fin area has reduced thrust wing incidence stabilizer incidence zero degrees George Clapp Central Square NY asked George Clapp fill us 126 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 Introducing Ceverites First Kit Fabulous Dealer write Coerite 420 Babylon Rd Horsham PA 19044 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barklcys TIGER MOTH KIT- $22995* *Cincludes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUAD RAt ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service . Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1980/07
Page Numbers: 66, 67, 68, 125, 126
WHETHER specialty Peanuts controlliners Jumbos Monster RC models will eventually faced problem enlarging 3-view drawings pians Traditional methods have included use grid-lines pro portional dividers pantographs photostats workable has disadvantages grid system involves drawing squares original small plan proportionately larger ones proposed enlargement number ing grid lines can transfer relative locations shapes desired size Unfortunately system relies heavily upon eyeball measuring always precise Proportional dividers draftsmans tools may used transfer point measure ments directly small original drawing directly final size adiustable ratio once correctly set eliminate need ordinary measurements rulers ever number operations involved using scale up plan makes system laborious slow subject errors particularly very large blow ups involved Pantographs operate similar manner proportional dividers involve continuous tracing action stylus duplicated through linkage desired size pencil opposite end device Limitations include lack sufficient travel permit doing really large plan single go problems n aintaining pressure both stylds pencil owing fairly flexible linkage involved Some people evidently still appreciate rather ancient device still being marketed noted source list Photostats doubtless fastest way enlarging plan 3-view also costly especially giant sizes wanted some instances time savings convenience may help justify price well leam few fundamentals process employs camera lens enlarge image project onto sensitized material such film better quality machines employ precision optical ele ments rigid construction vacuum-frames securely hold drawing copied features help minimize possible distor tions improve fidelity enlargement skill operator also key factor course choice materials equipment accurate correctly adjusted certain amount slippage can caused shrinkage stretching wet processing Often experienced operator can anticipate amount change compen sate least some degree positive guarantee success use mylar film dimensionally stable naturally expensive sure explain tolerance requirements beforehand ordering photo stat Some firms will charge higher price extremely close tolerances specified other cost-saving possibilities example some shops offer PMT system produces direct positive print cheaper methods require separate film intermediate negative speaking nega tives money can saved can traced about easily positive prints dont rule out short sure explain advance what needs results can greater economy possibly accurate work Photostat services frequently available blueprint companies some print shops few telephone calls will likely locate such facility area Prices vary widely dont hesitate shop around difference saved can invested building materials handy rotary calculating device available art supply graphic materials firms can quite useful modelers Consisting two cardboard calibrated discs unit can quickly show results size changes need mathematics example wish know what wing chord will tiny 3-view enlarged six feet can simply set dial 72-in mark other span 3-view wing Next measure 3-view wing chord find dimen sion rotary scale disc model size chord may read directly Obviously similar function can performed electronic calculator rotary wheel will never have dead batteries Either system will enable preview such vital items prop clearance wheel diameter etc before going trouble expense making enlargement Opaque projectors represent another optical approach producing large drawings use lens lens sytem reflect small image via mirror usually Onto surface such wall tracing over projected image sheet paper enlarged drawing can produced quite quickly size may easily adjusted changing distance opaque projector projection surface Fine focusing controlled moving lens holder until sharpest image may seen few general guidelines may order regarding devices First quality varies astonishing degree Some really intended toys just barely work opposite extreme some units costly might difficult justify expense average modeler Note may possible use high price spreads school library least worth investigat ing Some medium-price offerings may represent best value casual user optical properties opaque projectors particularly low-priced examples leave great deal desired instance central portion projected image may appear sharper outer edges simple modifica tion can improve condition although introduces another sort limitation card board disc small hole mounted directly front projection lens will increase overall sharpness projected image will exact reduction light intensity works totally dark room compromise may acceptable Experimenting disc hole-size will provide best combination Sometimes efficiency opaque projector may improved changing light bulb bulbs common frosted variety clear type Caution Most projectors specify maximum bulb wattage should exceeded Doing may increase heat output enoughto damage eitherthe copy orthe projector Some units employ special high-output bulbs efficient usual household variety few toy opaque projectors can improved replacing polished metal reflec July 1980 67 actual three-view drawings can reproduced other sizesall smalleron Xerox 9400 Duplicator suit layout B,j S PRQJECTOR projector must besquaretothe screen Project rectangle have drawn measure images sides validate whether set-up true Sides should equal lengths should sides B dont want distorted plans modell tor good quality glass mirror reworking mounts required maintain proper angle Keepingthe mirror lens cleanwill also promote efficiency Lens tissue used eye glasses suitable very soft cloth lightly moistened mild soap water will certain keep fingers away lens mirror surfaces fingerprints can cause perma nent damage wish copy drawing book magazine good idea have Xerox copy drawing made two reasons First prolonged heat exposure may damage publi cation second much easier work single thin sheet paper balance projector thick book addition possible harm publication uneven surface can cause distracting light leaks making projection set-up important image projected squarely relation surface avoid distortion produced angularity sketch shows simple method checking alignment possible mount opaque projector over drawing table permits comfortable working however occasional user amount effort involved making installa tion may excessive Also projection size range may somewhat restricted ceiling height unless interchangeable lenses different throws employed anyone wishing investigate sort custom-built arrangement suggest sending Edmund Scientific Build Opaque Projectors publication mentioned end article conventional opaque projectors size limited two factors size available room fall-off light distance increases Another problem sometimes encoun tered rather limited copy area Thus trying project 3-view original larger machine can seeitmayhaveto done sections rather tricky involves close-matching join areas Fortun ately optical answer problem too anyone neighborhood has Xerox 9400 Duplicator marvelous device can make reductions 98% 74% 65% original size doesnt make drawing small enough fit within opaque projector copy area reduced copy can reduced Best cost very low especially compared photostatic reductions Locally charge ten cents An indirect way achieve results sure very economical long run Camera System Another route plan enlargement involves use camera slide projector respects superior opaque projection especially already own equipment First optical quality lenses utilized almost undoubtedly better Second size original drawing copied becomes much less important reduc ing large originals easily accomplished single-lens reflex type camera strongly suggested Other varieties can employed need compensate parallax film sees through different window eye focusing problems complicate matters Some cameras can focus within foot object copied Others may require either close-up tubes supplementary lenses local photo supply dealer can advise advantages either will copying small drawings cost compara tively low will also prove useful taking close-up photos models Either color slide film regular black white maybe utilized Unless original 3-view color author prefers using black white film such Kodak Plus X film quite tolerant exposure errors low cost easily processed film negatives may mounted regular cardboard plastic metal slide mounts use normal slide projector Incidentally very few opaque projectors have provisions transparencies seem efficient convenient using black white negatives rather positives slides dazzle reduced projecting white-lines-on-black effect projected negative much easier eyes especially during extended tracing sessions important camera square 3-view copied may determined measurements very careful alignment view-finder margins single-lens reflex camera Use tripod table Continued page 125 68 Model Aviation Three tools aid drafting scaled-up -down drawing Proportional wheel proportional dividers electronic calculator Any devices eliminates tedious math calculations Specimen opaque projectors left Postoacope Display Artists Projector toy projector no brand name Rainbow Crafts opaque/ transparency toy projector key elements system opiicai enlarging ingle lens reflex camera slide projector commonly available equipment larger 21/4 square format good too Z LEN Z5OL AEROBATIC QUARTER SCALE MODEL n0 S C ENGINE 90 WINGSPAN 80 $4995 CONSTRUCTION Foam WingBalsa Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3/16 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 CHEROKEE DRIVE CANTON OH 44720 having convivial sip two owner remarked absence RC fliers loyal band speculated perhaps due large volume mail-ordering doing having own party down post office offer item detract RC modeling get thinking about things hobby dealer means besides just place buy little low-profit goodies cant get elsewhere cheaper Persevere start new model project week plan make FAG AMA Nats take neighbor kid flying field Saturday morning patient humble colum nist slow answering mail Its time inspired building Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 SAFETY/ PRESTON continued page 60 surgery stainless steel pin wood nylon prop injury would probably have severe editor goes compare racing 40 glass prop Skilsaw table saw think thats far wrong Remember toys can dangerous should command great deal respect care Although same league broken bones stainless pins think should warned another hazard associated least brand fiberglass prop Sharp edges Radio Flyer newsletter Western Michigan Radio Aircraft Flyers editor Rod Osbeck contained copy letter glass-reinforced prop manufacturer its February issue Appar ently seven club members received lacerations hand have considered nasty least required sutures less three month period June July August 1979 clear news letter article whether injuries sustained during normal contact prop during starting through unintentional contact engine running friend DCRC recently showed us some lacerations received such propeller during hand flipping starting operaton So alert intending use fiberglass prop next model examine edges blades have sharp edges take few swipes sanding block Needless say prop should rebalanced after such operation John D Preston 7012 Elvira Court Falls Church VA 22042 THREE-VI EW/HANNAN continued page 68 steadiness well cable-release shutter Stopping lens opening way down largest number such f/16 f/22 assures optimum sharpness Lighting may sunlight outdoors pair lamps provide illumination left right-hand side indoors again value singlelens-reflex camera will apparent since possible glare shadow condition will readily apparent through viewfinder Arriving suitable exposure may involve trial attempt two camera has built light-meter automatic exposure control may enable accep table results achieved first time However bracketing exposures using slightly dif ferent ones will increase chances good results Keeping records camera settings will enable repeat predictably during future copying sessions camera method also easy photograph number different 3-views set up thus anticipating possible future project requirements negatives mounted slides take very little storage space easily cataloged retrieval Sure beats trying find favorite drawing stack magazines Either camera/projector opaque projector system may also used aircraft photoXECUTI VE * 49 Wingspan * Wing Chord 12 * Wing Area 588 sq * Full symmetrical section * 41 Fuselage overall * Weight 4-112 lbs * Engine size 40 up * Takes 4-Channel RIC novice flyer can handle expert will enioy design gentle forgiving yet offers experienced inverted hands-off control knifeedge flight rolls spins aircraft will astound pleasure build parts fit fall together Accurate plans assembles quickly Gets air fun Its ship will last proud woodwork See DEALER INQUIRIES INVITED NY 11701 SIGN CORP July 1980 125 iting advertisers mention road about Model Aviation summary use optical sizing can save time minimize tedious computations offer shortcut production new designs add useful items modelers bag tricks Source List Proportional dividers scaling devices proportion wheels may obtained engineering equipment suppliers large art supply outlets Photostats offered some blueprint firms printing establishments Consult tele phone book Yellow Pages listings Camera supply stores can provide information single-lens reflex cameras slide mounts slide projectors Often used equipment avail able reasonable prices some firms offer rental equipment Opaque projectors stocked large art supply houses some toy stores may also ordered mail Please note because economic conditions prices availability may have changed since list compiled stamped addressed envelope sent sup pliers should provide current information Edmund Scientific Co 1888 Edscorp Building Barrington NJ 08007 Build Opaque Projectors fferent designs $150 Deluxe Opaque Projector * 80217 6 s 6 copy area two 200-watt bulbs cooling fan $8995 Imported west German Opaque Projector * 72443 5 area 150-watt quartz halogen lamp cooling blower $22995 $150 service handling Edmund Scientific orders Foster-Treat Inc Dept 4500-D Larchmonl NY 10538 Episcope Projector Made Italy Hi-intensity projection bulb 3 3 copy area $1195 plus 95 shipping handling Johnson Smith Company 35075 Automation Drive Ms Clemens MI 48043 Pantograph 25 different ratios # 6882 $795 plus $129 shipping handling Opaque Projector 3 x 4 copy area # 6007 $1095 plus $169 shipping handling graphs well drawings example insignia markings may projected directly upon construction drawings save time improve accuracy duplication Word About Drawings Although bit outside mainstream article Seems appropriate mention subject 3-views general First off high percentage contain errors sort another may have caused faulty reference information faulty perception drafting errors carelessness guess-work Additional distortions sometimes occur during reproduction processes Whether reasons discrepancies will greatly magnified drawings enlarged case sport stand-off type model may unimportant However serious scale model such problems may unacceptable Therefore pays check veracity 3view drawing advance enlarging Com pare length fuselage top view side view etc printed specifications available check against drawing conformity Dont however overlook possi bility typographical other mistakes written information Any inconsistencies need resolved correction perhaps selection alternative 3-view drawing before man-hours have invested enlargements Drawings should also compared photo graphs subject aircraft being careful allow misleading effects perspective unusual lighting photos available better chances arriving correct con clusions Vein Clements long-time scale modeler puts way comparing various drawings accuracy believe photo graphs Benno Sabel expert German technical artist model designer expresses opinion better refer photos technical drawings 3-views Forewarned forearmed Once have enlargement may overlaid drafting vellum tracing paper mylar drafting film basic drafting tools such T-square triangles french curves may employed making clean tracing eliminate free-hand drawing wiggles incorporate needed corrections remains design model structure may seem formidable task first reference published plans similar subjects will help point down path success After have three four such designs under belt may find designing operation satisfying building Powerful Enlarger Projector 400 watts heavy-duty motor fan 6 6 copy area * 6025 $8995 plus $200 shipping handling F 0 Kees Mfg Co Beatrice NB 68310 Postoscope Display Artists Projector Model E 6 6 copy area two 100-watt bulbs Send current price LETTERS continued page 12 correct aileron flutter Spook also suffered lead cant change directions fast aileron can flutter thus dampening flutter Spook now has completely rebuilt freize type ailemns Down thrust has removed wing symmetrical airfoil tail moment has extended 4 inches vertical fin area has reduced thrust wing incidence stabilizer incidence zero degrees George Clapp Central Square NY asked George Clapp fill us 126 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 Introducing Ceverites First Kit Fabulous Dealer write Coerite 420 Babylon Rd Horsham PA 19044 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barklcys TIGER MOTH KIT- $22995* *Cincludes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUAD RAt ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service . Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1980/07
Page Numbers: 66, 67, 68, 125, 126
WHETHER specialty Peanuts controlliners Jumbos Monster RC models will eventually faced problem enlarging 3-view drawings pians Traditional methods have included use grid-lines pro portional dividers pantographs photostats workable has disadvantages grid system involves drawing squares original small plan proportionately larger ones proposed enlargement number ing grid lines can transfer relative locations shapes desired size Unfortunately system relies heavily upon eyeball measuring always precise Proportional dividers draftsmans tools may used transfer point measure ments directly small original drawing directly final size adiustable ratio once correctly set eliminate need ordinary measurements rulers ever number operations involved using scale up plan makes system laborious slow subject errors particularly very large blow ups involved Pantographs operate similar manner proportional dividers involve continuous tracing action stylus duplicated through linkage desired size pencil opposite end device Limitations include lack sufficient travel permit doing really large plan single go problems n aintaining pressure both stylds pencil owing fairly flexible linkage involved Some people evidently still appreciate rather ancient device still being marketed noted source list Photostats doubtless fastest way enlarging plan 3-view also costly especially giant sizes wanted some instances time savings convenience may help justify price well leam few fundamentals process employs camera lens enlarge image project onto sensitized material such film better quality machines employ precision optical ele ments rigid construction vacuum-frames securely hold drawing copied features help minimize possible distor tions improve fidelity enlargement skill operator also key factor course choice materials equipment accurate correctly adjusted certain amount slippage can caused shrinkage stretching wet processing Often experienced operator can anticipate amount change compen sate least some degree positive guarantee success use mylar film dimensionally stable naturally expensive sure explain tolerance requirements beforehand ordering photo stat Some firms will charge higher price extremely close tolerances specified other cost-saving possibilities example some shops offer PMT system produces direct positive print cheaper methods require separate film intermediate negative speaking nega tives money can saved can traced about easily positive prints dont rule out short sure explain advance what needs results can greater economy possibly accurate work Photostat services frequently available blueprint companies some print shops few telephone calls will likely locate such facility area Prices vary widely dont hesitate shop around difference saved can invested building materials handy rotary calculating device available art supply graphic materials firms can quite useful modelers Consisting two cardboard calibrated discs unit can quickly show results size changes need mathematics example wish know what wing chord will tiny 3-view enlarged six feet can simply set dial 72-in mark other span 3-view wing Next measure 3-view wing chord find dimen sion rotary scale disc model size chord may read directly Obviously similar function can performed electronic calculator rotary wheel will never have dead batteries Either system will enable preview such vital items prop clearance wheel diameter etc before going trouble expense making enlargement Opaque projectors represent another optical approach producing large drawings use lens lens sytem reflect small image via mirror usually Onto surface such wall tracing over projected image sheet paper enlarged drawing can produced quite quickly size may easily adjusted changing distance opaque projector projection surface Fine focusing controlled moving lens holder until sharpest image may seen few general guidelines may order regarding devices First quality varies astonishing degree Some really intended toys just barely work opposite extreme some units costly might difficult justify expense average modeler Note may possible use high price spreads school library least worth investigat ing Some medium-price offerings may represent best value casual user optical properties opaque projectors particularly low-priced examples leave great deal desired instance central portion projected image may appear sharper outer edges simple modifica tion can improve condition although introduces another sort limitation card board disc small hole mounted directly front projection lens will increase overall sharpness projected image will exact reduction light intensity works totally dark room compromise may acceptable Experimenting disc hole-size will provide best combination Sometimes efficiency opaque projector may improved changing light bulb bulbs common frosted variety clear type Caution Most projectors specify maximum bulb wattage should exceeded Doing may increase heat output enoughto damage eitherthe copy orthe projector Some units employ special high-output bulbs efficient usual household variety few toy opaque projectors can improved replacing polished metal reflec July 1980 67 actual three-view drawings can reproduced other sizesall smalleron Xerox 9400 Duplicator suit layout B,j S PRQJECTOR projector must besquaretothe screen Project rectangle have drawn measure images sides validate whether set-up true Sides should equal lengths should sides B dont want distorted plans modell tor good quality glass mirror reworking mounts required maintain proper angle Keepingthe mirror lens cleanwill also promote efficiency Lens tissue used eye glasses suitable very soft cloth lightly moistened mild soap water will certain keep fingers away lens mirror surfaces fingerprints can cause perma nent damage wish copy drawing book magazine good idea have Xerox copy drawing made two reasons First prolonged heat exposure may damage publi cation second much easier work single thin sheet paper balance projector thick book addition possible harm publication uneven surface can cause distracting light leaks making projection set-up important image projected squarely relation surface avoid distortion produced angularity sketch shows simple method checking alignment possible mount opaque projector over drawing table permits comfortable working however occasional user amount effort involved making installa tion may excessive Also projection size range may somewhat restricted ceiling height unless interchangeable lenses different throws employed anyone wishing investigate sort custom-built arrangement suggest sending Edmund Scientific Build Opaque Projectors publication mentioned end article conventional opaque projectors size limited two factors size available room fall-off light distance increases Another problem sometimes encoun tered rather limited copy area Thus trying project 3-view original larger machine can seeitmayhaveto done sections rather tricky involves close-matching join areas Fortun ately optical answer problem too anyone neighborhood has Xerox 9400 Duplicator marvelous device can make reductions 98% 74% 65% original size doesnt make drawing small enough fit within opaque projector copy area reduced copy can reduced Best cost very low especially compared photostatic reductions Locally charge ten cents An indirect way achieve results sure very economical long run Camera System Another route plan enlargement involves use camera slide projector respects superior opaque projection especially already own equipment First optical quality lenses utilized almost undoubtedly better Second size original drawing copied becomes much less important reduc ing large originals easily accomplished single-lens reflex type camera strongly suggested Other varieties can employed need compensate parallax film sees through different window eye focusing problems complicate matters Some cameras can focus within foot object copied Others may require either close-up tubes supplementary lenses local photo supply dealer can advise advantages either will copying small drawings cost compara tively low will also prove useful taking close-up photos models Either color slide film regular black white maybe utilized Unless original 3-view color author prefers using black white film such Kodak Plus X film quite tolerant exposure errors low cost easily processed film negatives may mounted regular cardboard plastic metal slide mounts use normal slide projector Incidentally very few opaque projectors have provisions transparencies seem efficient convenient using black white negatives rather positives slides dazzle reduced projecting white-lines-on-black effect projected negative much easier eyes especially during extended tracing sessions important camera square 3-view copied may determined measurements very careful alignment view-finder margins single-lens reflex camera Use tripod table Continued page 125 68 Model Aviation Three tools aid drafting scaled-up -down drawing Proportional wheel proportional dividers electronic calculator Any devices eliminates tedious math calculations Specimen opaque projectors left Postoacope Display Artists Projector toy projector no brand name Rainbow Crafts opaque/ transparency toy projector key elements system opiicai enlarging ingle lens reflex camera slide projector commonly available equipment larger 21/4 square format good too Z LEN Z5OL AEROBATIC QUARTER SCALE MODEL n0 S C ENGINE 90 WINGSPAN 80 $4995 CONSTRUCTION Foam WingBalsa Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3/16 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 CHEROKEE DRIVE CANTON OH 44720 having convivial sip two owner remarked absence RC fliers loyal band speculated perhaps due large volume mail-ordering doing having own party down post office offer item detract RC modeling get thinking about things hobby dealer means besides just place buy little low-profit goodies cant get elsewhere cheaper Persevere start new model project week plan make FAG AMA Nats take neighbor kid flying field Saturday morning patient humble colum nist slow answering mail Its time inspired building Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 SAFETY/ PRESTON continued page 60 surgery stainless steel pin wood nylon prop injury would probably have severe editor goes compare racing 40 glass prop Skilsaw table saw think thats far wrong Remember toys can dangerous should command great deal respect care Although same league broken bones stainless pins think should warned another hazard associated least brand fiberglass prop Sharp edges Radio Flyer newsletter Western Michigan Radio Aircraft Flyers editor Rod Osbeck contained copy letter glass-reinforced prop manufacturer its February issue Appar ently seven club members received lacerations hand have considered nasty least required sutures less three month period June July August 1979 clear news letter article whether injuries sustained during normal contact prop during starting through unintentional contact engine running friend DCRC recently showed us some lacerations received such propeller during hand flipping starting operaton So alert intending use fiberglass prop next model examine edges blades have sharp edges take few swipes sanding block Needless say prop should rebalanced after such operation John D Preston 7012 Elvira Court Falls Church VA 22042 THREE-VI EW/HANNAN continued page 68 steadiness well cable-release shutter Stopping lens opening way down largest number such f/16 f/22 assures optimum sharpness Lighting may sunlight outdoors pair lamps provide illumination left right-hand side indoors again value singlelens-reflex camera will apparent since possible glare shadow condition will readily apparent through viewfinder Arriving suitable exposure may involve trial attempt two camera has built light-meter automatic exposure control may enable accep table results achieved first time However bracketing exposures using slightly dif ferent ones will increase chances good results Keeping records camera settings will enable repeat predictably during future copying sessions camera method also easy photograph number different 3-views set up thus anticipating possible future project requirements negatives mounted slides take very little storage space easily cataloged retrieval Sure beats trying find favorite drawing stack magazines Either camera/projector opaque projector system may also used aircraft photoXECUTI VE * 49 Wingspan * Wing Chord 12 * Wing Area 588 sq * Full symmetrical section * 41 Fuselage overall * Weight 4-112 lbs * Engine size 40 up * Takes 4-Channel RIC novice flyer can handle expert will enioy design gentle forgiving yet offers experienced inverted hands-off control knifeedge flight rolls spins aircraft will astound pleasure build parts fit fall together Accurate plans assembles quickly Gets air fun Its ship will last proud woodwork See DEALER INQUIRIES INVITED NY 11701 SIGN CORP July 1980 125 iting advertisers mention road about Model Aviation summary use optical sizing can save time minimize tedious computations offer shortcut production new designs add useful items modelers bag tricks Source List Proportional dividers scaling devices proportion wheels may obtained engineering equipment suppliers large art supply outlets Photostats offered some blueprint firms printing establishments Consult tele phone book Yellow Pages listings Camera supply stores can provide information single-lens reflex cameras slide mounts slide projectors Often used equipment avail able reasonable prices some firms offer rental equipment Opaque projectors stocked large art supply houses some toy stores may also ordered mail Please note because economic conditions prices availability may have changed since list compiled stamped addressed envelope sent sup pliers should provide current information Edmund Scientific Co 1888 Edscorp Building Barrington NJ 08007 Build Opaque Projectors fferent designs $150 Deluxe Opaque Projector * 80217 6 s 6 copy area two 200-watt bulbs cooling fan $8995 Imported west German Opaque Projector * 72443 5 area 150-watt quartz halogen lamp cooling blower $22995 $150 service handling Edmund Scientific orders Foster-Treat Inc Dept 4500-D Larchmonl NY 10538 Episcope Projector Made Italy Hi-intensity projection bulb 3 3 copy area $1195 plus 95 shipping handling Johnson Smith Company 35075 Automation Drive Ms Clemens MI 48043 Pantograph 25 different ratios # 6882 $795 plus $129 shipping handling Opaque Projector 3 x 4 copy area # 6007 $1095 plus $169 shipping handling graphs well drawings example insignia markings may projected directly upon construction drawings save time improve accuracy duplication Word About Drawings Although bit outside mainstream article Seems appropriate mention subject 3-views general First off high percentage contain errors sort another may have caused faulty reference information faulty perception drafting errors carelessness guess-work Additional distortions sometimes occur during reproduction processes Whether reasons discrepancies will greatly magnified drawings enlarged case sport stand-off type model may unimportant However serious scale model such problems may unacceptable Therefore pays check veracity 3view drawing advance enlarging Com pare length fuselage top view side view etc printed specifications available check against drawing conformity Dont however overlook possi bility typographical other mistakes written information Any inconsistencies need resolved correction perhaps selection alternative 3-view drawing before man-hours have invested enlargements Drawings should also compared photo graphs subject aircraft being careful allow misleading effects perspective unusual lighting photos available better chances arriving correct con clusions Vein Clements long-time scale modeler puts way comparing various drawings accuracy believe photo graphs Benno Sabel expert German technical artist model designer expresses opinion better refer photos technical drawings 3-views Forewarned forearmed Once have enlargement may overlaid drafting vellum tracing paper mylar drafting film basic drafting tools such T-square triangles french curves may employed making clean tracing eliminate free-hand drawing wiggles incorporate needed corrections remains design model structure may seem formidable task first reference published plans similar subjects will help point down path success After have three four such designs under belt may find designing operation satisfying building Powerful Enlarger Projector 400 watts heavy-duty motor fan 6 6 copy area * 6025 $8995 plus $200 shipping handling F 0 Kees Mfg Co Beatrice NB 68310 Postoscope Display Artists Projector Model E 6 6 copy area two 100-watt bulbs Send current price LETTERS continued page 12 correct aileron flutter Spook also suffered lead cant change directions fast aileron can flutter thus dampening flutter Spook now has completely rebuilt freize type ailemns Down thrust has removed wing symmetrical airfoil tail moment has extended 4 inches vertical fin area has reduced thrust wing incidence stabilizer incidence zero degrees George Clapp Central Square NY asked George Clapp fill us 126 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 Introducing Ceverites First Kit Fabulous Dealer write Coerite 420 Babylon Rd Horsham PA 19044 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barklcys TIGER MOTH KIT- $22995* *Cincludes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUAD RAt ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service . Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706
Edition: Model Aviation - 1980/07
Page Numbers: 66, 67, 68, 125, 126
WHETHER specialty Peanuts controlliners Jumbos Monster RC models will eventually faced problem enlarging 3-view drawings pians Traditional methods have included use grid-lines pro portional dividers pantographs photostats workable has disadvantages grid system involves drawing squares original small plan proportionately larger ones proposed enlargement number ing grid lines can transfer relative locations shapes desired size Unfortunately system relies heavily upon eyeball measuring always precise Proportional dividers draftsmans tools may used transfer point measure ments directly small original drawing directly final size adiustable ratio once correctly set eliminate need ordinary measurements rulers ever number operations involved using scale up plan makes system laborious slow subject errors particularly very large blow ups involved Pantographs operate similar manner proportional dividers involve continuous tracing action stylus duplicated through linkage desired size pencil opposite end device Limitations include lack sufficient travel permit doing really large plan single go problems n aintaining pressure both stylds pencil owing fairly flexible linkage involved Some people evidently still appreciate rather ancient device still being marketed noted source list Photostats doubtless fastest way enlarging plan 3-view also costly especially giant sizes wanted some instances time savings convenience may help justify price well leam few fundamentals process employs camera lens enlarge image project onto sensitized material such film better quality machines employ precision optical ele ments rigid construction vacuum-frames securely hold drawing copied features help minimize possible distor tions improve fidelity enlargement skill operator also key factor course choice materials equipment accurate correctly adjusted certain amount slippage can caused shrinkage stretching wet processing Often experienced operator can anticipate amount change compen sate least some degree positive guarantee success use mylar film dimensionally stable naturally expensive sure explain tolerance requirements beforehand ordering photo stat Some firms will charge higher price extremely close tolerances specified other cost-saving possibilities example some shops offer PMT system produces direct positive print cheaper methods require separate film intermediate negative speaking nega tives money can saved can traced about easily positive prints dont rule out short sure explain advance what needs results can greater economy possibly accurate work Photostat services frequently available blueprint companies some print shops few telephone calls will likely locate such facility area Prices vary widely dont hesitate shop around difference saved can invested building materials handy rotary calculating device available art supply graphic materials firms can quite useful modelers Consisting two cardboard calibrated discs unit can quickly show results size changes need mathematics example wish know what wing chord will tiny 3-view enlarged six feet can simply set dial 72-in mark other span 3-view wing Next measure 3-view wing chord find dimen sion rotary scale disc model size chord may read directly Obviously similar function can performed electronic calculator rotary wheel will never have dead batteries Either system will enable preview such vital items prop clearance wheel diameter etc before going trouble expense making enlargement Opaque projectors represent another optical approach producing large drawings use lens lens sytem reflect small image via mirror usually Onto surface such wall tracing over projected image sheet paper enlarged drawing can produced quite quickly size may easily adjusted changing distance opaque projector projection surface Fine focusing controlled moving lens holder until sharpest image may seen few general guidelines may order regarding devices First quality varies astonishing degree Some really intended toys just barely work opposite extreme some units costly might difficult justify expense average modeler Note may possible use high price spreads school library least worth investigat ing Some medium-price offerings may represent best value casual user optical properties opaque projectors particularly low-priced examples leave great deal desired instance central portion projected image may appear sharper outer edges simple modifica tion can improve condition although introduces another sort limitation card board disc small hole mounted directly front projection lens will increase overall sharpness projected image will exact reduction light intensity works totally dark room compromise may acceptable Experimenting disc hole-size will provide best combination Sometimes efficiency opaque projector may improved changing light bulb bulbs common frosted variety clear type Caution Most projectors specify maximum bulb wattage should exceeded Doing may increase heat output enoughto damage eitherthe copy orthe projector Some units employ special high-output bulbs efficient usual household variety few toy opaque projectors can improved replacing polished metal reflec July 1980 67 actual three-view drawings can reproduced other sizesall smalleron Xerox 9400 Duplicator suit layout B,j S PRQJECTOR projector must besquaretothe screen Project rectangle have drawn measure images sides validate whether set-up true Sides should equal lengths should sides B dont want distorted plans modell tor good quality glass mirror reworking mounts required maintain proper angle Keepingthe mirror lens cleanwill also promote efficiency Lens tissue used eye glasses suitable very soft cloth lightly moistened mild soap water will certain keep fingers away lens mirror surfaces fingerprints can cause perma nent damage wish copy drawing book magazine good idea have Xerox copy drawing made two reasons First prolonged heat exposure may damage publi cation second much easier work single thin sheet paper balance projector thick book addition possible harm publication uneven surface can cause distracting light leaks making projection set-up important image projected squarely relation surface avoid distortion produced angularity sketch shows simple method checking alignment possible mount opaque projector over drawing table permits comfortable working however occasional user amount effort involved making installa tion may excessive Also projection size range may somewhat restricted ceiling height unless interchangeable lenses different throws employed anyone wishing investigate sort custom-built arrangement suggest sending Edmund Scientific Build Opaque Projectors publication mentioned end article conventional opaque projectors size limited two factors size available room fall-off light distance increases Another problem sometimes encoun tered rather limited copy area Thus trying project 3-view original larger machine can seeitmayhaveto done sections rather tricky involves close-matching join areas Fortun ately optical answer problem too anyone neighborhood has Xerox 9400 Duplicator marvelous device can make reductions 98% 74% 65% original size doesnt make drawing small enough fit within opaque projector copy area reduced copy can reduced Best cost very low especially compared photostatic reductions Locally charge ten cents An indirect way achieve results sure very economical long run Camera System Another route plan enlargement involves use camera slide projector respects superior opaque projection especially already own equipment First optical quality lenses utilized almost undoubtedly better Second size original drawing copied becomes much less important reduc ing large originals easily accomplished single-lens reflex type camera strongly suggested Other varieties can employed need compensate parallax film sees through different window eye focusing problems complicate matters Some cameras can focus within foot object copied Others may require either close-up tubes supplementary lenses local photo supply dealer can advise advantages either will copying small drawings cost compara tively low will also prove useful taking close-up photos models Either color slide film regular black white maybe utilized Unless original 3-view color author prefers using black white film such Kodak Plus X film quite tolerant exposure errors low cost easily processed film negatives may mounted regular cardboard plastic metal slide mounts use normal slide projector Incidentally very few opaque projectors have provisions transparencies seem efficient convenient using black white negatives rather positives slides dazzle reduced projecting white-lines-on-black effect projected negative much easier eyes especially during extended tracing sessions important camera square 3-view copied may determined measurements very careful alignment view-finder margins single-lens reflex camera Use tripod table Continued page 125 68 Model Aviation Three tools aid drafting scaled-up -down drawing Proportional wheel proportional dividers electronic calculator Any devices eliminates tedious math calculations Specimen opaque projectors left Postoacope Display Artists Projector toy projector no brand name Rainbow Crafts opaque/ transparency toy projector key elements system opiicai enlarging ingle lens reflex camera slide projector commonly available equipment larger 21/4 square format good too Z LEN Z5OL AEROBATIC QUARTER SCALE MODEL n0 S C ENGINE 90 WINGSPAN 80 $4995 CONSTRUCTION Foam WingBalsa Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3/16 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 CHEROKEE DRIVE CANTON OH 44720 having convivial sip two owner remarked absence RC fliers loyal band speculated perhaps due large volume mail-ordering doing having own party down post office offer item detract RC modeling get thinking about things hobby dealer means besides just place buy little low-profit goodies cant get elsewhere cheaper Persevere start new model project week plan make FAG AMA Nats take neighbor kid flying field Saturday morning patient humble colum nist slow answering mail Its time inspired building Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 SAFETY/ PRESTON continued page 60 surgery stainless steel pin wood nylon prop injury would probably have severe editor goes compare racing 40 glass prop Skilsaw table saw think thats far wrong Remember toys can dangerous should command great deal respect care Although same league broken bones stainless pins think should warned another hazard associated least brand fiberglass prop Sharp edges Radio Flyer newsletter Western Michigan Radio Aircraft Flyers editor Rod Osbeck contained copy letter glass-reinforced prop manufacturer its February issue Appar ently seven club members received lacerations hand have considered nasty least required sutures less three month period June July August 1979 clear news letter article whether injuries sustained during normal contact prop during starting through unintentional contact engine running friend DCRC recently showed us some lacerations received such propeller during hand flipping starting operaton So alert intending use fiberglass prop next model examine edges blades have sharp edges take few swipes sanding block Needless say prop should rebalanced after such operation John D Preston 7012 Elvira Court Falls Church VA 22042 THREE-VI EW/HANNAN continued page 68 steadiness well cable-release shutter Stopping lens opening way down largest number such f/16 f/22 assures optimum sharpness Lighting may sunlight outdoors pair lamps provide illumination left right-hand side indoors again value singlelens-reflex camera will apparent since possible glare shadow condition will readily apparent through viewfinder Arriving suitable exposure may involve trial attempt two camera has built light-meter automatic exposure control may enable accep table results achieved first time However bracketing exposures using slightly dif ferent ones will increase chances good results Keeping records camera settings will enable repeat predictably during future copying sessions camera method also easy photograph number different 3-views set up thus anticipating possible future project requirements negatives mounted slides take very little storage space easily cataloged retrieval Sure beats trying find favorite drawing stack magazines Either camera/projector opaque projector system may also used aircraft photoXECUTI VE * 49 Wingspan * Wing Chord 12 * Wing Area 588 sq * Full symmetrical section * 41 Fuselage overall * Weight 4-112 lbs * Engine size 40 up * Takes 4-Channel RIC novice flyer can handle expert will enioy design gentle forgiving yet offers experienced inverted hands-off control knifeedge flight rolls spins aircraft will astound pleasure build parts fit fall together Accurate plans assembles quickly Gets air fun Its ship will last proud woodwork See DEALER INQUIRIES INVITED NY 11701 SIGN CORP July 1980 125 iting advertisers mention road about Model Aviation summary use optical sizing can save time minimize tedious computations offer shortcut production new designs add useful items modelers bag tricks Source List Proportional dividers scaling devices proportion wheels may obtained engineering equipment suppliers large art supply outlets Photostats offered some blueprint firms printing establishments Consult tele phone book Yellow Pages listings Camera supply stores can provide information single-lens reflex cameras slide mounts slide projectors Often used equipment avail able reasonable prices some firms offer rental equipment Opaque projectors stocked large art supply houses some toy stores may also ordered mail Please note because economic conditions prices availability may have changed since list compiled stamped addressed envelope sent sup pliers should provide current information Edmund Scientific Co 1888 Edscorp Building Barrington NJ 08007 Build Opaque Projectors fferent designs $150 Deluxe Opaque Projector * 80217 6 s 6 copy area two 200-watt bulbs cooling fan $8995 Imported west German Opaque Projector * 72443 5 area 150-watt quartz halogen lamp cooling blower $22995 $150 service handling Edmund Scientific orders Foster-Treat Inc Dept 4500-D Larchmonl NY 10538 Episcope Projector Made Italy Hi-intensity projection bulb 3 3 copy area $1195 plus 95 shipping handling Johnson Smith Company 35075 Automation Drive Ms Clemens MI 48043 Pantograph 25 different ratios # 6882 $795 plus $129 shipping handling Opaque Projector 3 x 4 copy area # 6007 $1095 plus $169 shipping handling graphs well drawings example insignia markings may projected directly upon construction drawings save time improve accuracy duplication Word About Drawings Although bit outside mainstream article Seems appropriate mention subject 3-views general First off high percentage contain errors sort another may have caused faulty reference information faulty perception drafting errors carelessness guess-work Additional distortions sometimes occur during reproduction processes Whether reasons discrepancies will greatly magnified drawings enlarged case sport stand-off type model may unimportant However serious scale model such problems may unacceptable Therefore pays check veracity 3view drawing advance enlarging Com pare length fuselage top view side view etc printed specifications available check against drawing conformity Dont however overlook possi bility typographical other mistakes written information Any inconsistencies need resolved correction perhaps selection alternative 3-view drawing before man-hours have invested enlargements Drawings should also compared photo graphs subject aircraft being careful allow misleading effects perspective unusual lighting photos available better chances arriving correct con clusions Vein Clements long-time scale modeler puts way comparing various drawings accuracy believe photo graphs Benno Sabel expert German technical artist model designer expresses opinion better refer photos technical drawings 3-views Forewarned forearmed Once have enlargement may overlaid drafting vellum tracing paper mylar drafting film basic drafting tools such T-square triangles french curves may employed making clean tracing eliminate free-hand drawing wiggles incorporate needed corrections remains design model structure may seem formidable task first reference published plans similar subjects will help point down path success After have three four such designs under belt may find designing operation satisfying building Powerful Enlarger Projector 400 watts heavy-duty motor fan 6 6 copy area * 6025 $8995 plus $200 shipping handling F 0 Kees Mfg Co Beatrice NB 68310 Postoscope Display Artists Projector Model E 6 6 copy area two 100-watt bulbs Send current price LETTERS continued page 12 correct aileron flutter Spook also suffered lead cant change directions fast aileron can flutter thus dampening flutter Spook now has completely rebuilt freize type ailemns Down thrust has removed wing symmetrical airfoil tail moment has extended 4 inches vertical fin area has reduced thrust wing incidence stabilizer incidence zero degrees George Clapp Central Square NY asked George Clapp fill us 126 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 Introducing Ceverites First Kit Fabulous Dealer write Coerite 420 Babylon Rd Horsham PA 19044 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barklcys TIGER MOTH KIT- $22995* *Cincludes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUAD RAt ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service . Add $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706