George M Myers 2@if1y7uuiy Hx3y WHEN PEOPLE DISCUSS CAD Computer Aided Drawing software have right ask should care afraid use computer CAD way Drawing way communicate information Universal drawing conventions represent threedimensional world two-dimensional sheet material conventions extend language want learn draw swiftly accurately can communicate better Think map people understand maps whether speak language map-maker Maps sketch reality Swiss Army Knife CAD Software Recently received DesignCAD 2-D version 6 full-featured drawing tool capable making precise drawings box books Design CAD Resource & Applications Reference Book contains descriptions about 350 add-on software packages ranging animation drawings thru vinyl cutting signs prices add-ons range $10 $20000 DesignCAD 2-D relatively cheap $34995 long list add-ons indicates people have using DesignCAD extending its capabilities should point out add-ons come worldwide sources including American Small Business Computers Inc company name sounds familiar its because produce DesignCAD 2-D ModelCAD has advertised Model Aviation years Two its add-ons Scanover see MA December 1992 Aerodraw 2D Scanover helps trace drawings have scanned computer Aerodraw 2D helps draw airplane parts such bulkheads wing ribs contains library airfoils Eppler NACA 4-digit 6-series Clark W X Y others See Windsoft ads magazine other products Some Thoughts CAD Drawing Process working drawing board think about information developing before eyes imagine what will describe image graphically according rules understood will build draw right can build chore drafting lies doing over work hard put group lines exactly think should discover must changed must erase redraw copy what good go computer really shines Hit few keys deed done No eraser crumbs coffee Sometimes have redraw same detail eg tapered-wing ribs several places computer captures image scales necessary copies wherever want again couple keystrokes persistent problem draftsman accurately drawing long parallel perpendicular lines Think border around drawing customers faith can spoiled just putting down crooked border Again computer makes easy because work coordinate system always perfect Its bit like working large piece graph paper old days finished paper drawing mess Graphite pencil lead smeared everywhere surface abused impressions lines remains erasures So finished drawing traced linen using India ink copied blueprint Ozalid process make prints mechanics Today working prints can made paper mylar just pushing few buttons Model airplane builders want precise drawings expect cut rib drawings patterns use build true wing expect cut out bulkheads produce fuselage ripples bulges objective define shape has precisely right size shape DesignCAD 2-D can make took mc years learn aircraft graphics language use drawing tools efficiently Today CAD program can learned few days allowing make drawings still wont know graphic language needed communicate mechanics unless mechanic another model builder both have built models same kind plans contrast drawing house just sketch mechanics already know build house fill walls around prebuilt things like doors windows stairs layout tools level plumb bob zig-zag ruler chalk line dont use sandpaper make things fit perfectly DesignCAD 2-D overkill making house drawings can make think about main reason making house drawing get approval build Designing Model least three ways design something I Similarity can copy something works making small changes suit needs 2 Test Draw pretty picture build according previous experience test extreme conditions After few repairs have design June1994 59 Tom Hunt aircraft Beechcraft Pucara designed CAD twin Mustang wasnt 3 Analysis have equations accurately predict results can put equations together math model programs weight balance performance stability control stress analysis come test ideas math model d eveloping design Drawing Model Airplane Lets assume want scale model some airplane Perhaps Windsoft sold compact disk containing plans photographs scale documentation Windsoft licensed produce CAD drawings Aviation Heritage exclusive Hirsch exclusive Paul Matt RCM Scalecraft Superscale will follow TIF files will available first though CAD formats will provided 300 dots per inch dpi 1/2-size same 150 dpi full size want create own design its time learn DesignCAD Step choose page large enough show details Weigh motor RC system whatever else expect build airplane As first guess Electric airplane should double weight allow structure covering Estimate required wing area dividing total weight ounces 15 result will required wing area square feet wing loading 15 ounces per square foot Fifteen ounces per square foot good number small wings two four square feet can go up 25 ounces per square foot larger wings four eight square feet Convert area wingspan chord Estimate fuselage length two/thirds wingspan Now know what size paper will need drawing preliminary weight balance calculation discover center gravity will locates wing satisfied estimate some structure hold pieces place point may want some strength analysis also called stress analysis should want know structure will strong enough stiff enough Ive left unsaid stress analysis weight balance calculations programs calculating performance stability control Right now discussing drawing program determined page size above So get books find out make rectangle size Draw print will learn draw things full-size make full-size print may require several sheets printer must pasted together make drawing end up wrong size sheet paper will know have study Step two draw plans about just putting border rough outlines wing fuselage Print see what have everything fits can make rest drawing Step three Now can use Scanover call image CD DesignCAD 2D Follow Scanover DesignCAD instructions trace drawing soon will have plan air passage surface Thats put paint point airplane company would make solid model shape put wind tunnel purpose would get some idea lift drag stability control characteristics shape Since making scale model something actually flew well skip step assume model will fly Print what have Lay motor radio equipment want carry drawing already have scale drawings equipment can call drawing move around screen fit may want move some things around change scale big advantages CAD model drawings changing scaie matter pushing few buttons like what have go back fill structure point Aerodraw 2D can help develop ribs bulkheads Build tail see estimate structural weight correct may have allow weight structure hence use different scale Easy already know make drawing different scale wing Weight OK fuselage Stuff equipment changes may necessary get right cover decorate model reinstall equipment balance should about right fly Did break Another nice aspect CAD drawings dont have work sliced-up pinholed glue-smeared drawings can print clean new ones repair session DesignCAD 2-D 3-D already available Windows version Scanover Aerodraw 2D soon will News FlashNews Flash new era modeling has dawned can have drawing published magazine format allows reader build model scale desired original might Peanut Scale modeler wants scale Software under development will rescale drawing modify structure accordingly dont need own computer Windsoft does job source expects magazine will publish drawings infinite format 1996 will scale print order software will design structure suit scale will have specify scale construction mode want sticks covering foam core fiberglass shell etc software defines environment 1996 should allow build aircraft databases CAD drawings specifically designed publication simultaneous activity get licenses reproduce model airplane drawing ever published SAM people Scale modelers should love Sources DesignCAD 2-D $34995 ModelCAD $9995 DesignCAD Resource Applications Reference Book Other products American Small Business Computers Inc American Way Pryor OK 74361-8801 Tel 918 825-4844 Ask Keith Campbell Scanover & dot matrix plotter basic $19900 Aerodraw 2D $9995 Scanned Scale Drawings pictures scale documentation CD-ROM Windsoft Co 1405 Hopkins Ave Dover DE 19901-5 174 Tel 302 678-5174 Ask Bill Windsor odel Aviation e Geist Astro Porterfield floats sort model might want rescale different motor
Edition: Model Aviation - 1994/06
Page Numbers: 59, 60
George M Myers 2@if1y7uuiy Hx3y WHEN PEOPLE DISCUSS CAD Computer Aided Drawing software have right ask should care afraid use computer CAD way Drawing way communicate information Universal drawing conventions represent threedimensional world two-dimensional sheet material conventions extend language want learn draw swiftly accurately can communicate better Think map people understand maps whether speak language map-maker Maps sketch reality Swiss Army Knife CAD Software Recently received DesignCAD 2-D version 6 full-featured drawing tool capable making precise drawings box books Design CAD Resource & Applications Reference Book contains descriptions about 350 add-on software packages ranging animation drawings thru vinyl cutting signs prices add-ons range $10 $20000 DesignCAD 2-D relatively cheap $34995 long list add-ons indicates people have using DesignCAD extending its capabilities should point out add-ons come worldwide sources including American Small Business Computers Inc company name sounds familiar its because produce DesignCAD 2-D ModelCAD has advertised Model Aviation years Two its add-ons Scanover see MA December 1992 Aerodraw 2D Scanover helps trace drawings have scanned computer Aerodraw 2D helps draw airplane parts such bulkheads wing ribs contains library airfoils Eppler NACA 4-digit 6-series Clark W X Y others See Windsoft ads magazine other products Some Thoughts CAD Drawing Process working drawing board think about information developing before eyes imagine what will describe image graphically according rules understood will build draw right can build chore drafting lies doing over work hard put group lines exactly think should discover must changed must erase redraw copy what good go computer really shines Hit few keys deed done No eraser crumbs coffee Sometimes have redraw same detail eg tapered-wing ribs several places computer captures image scales necessary copies wherever want again couple keystrokes persistent problem draftsman accurately drawing long parallel perpendicular lines Think border around drawing customers faith can spoiled just putting down crooked border Again computer makes easy because work coordinate system always perfect Its bit like working large piece graph paper old days finished paper drawing mess Graphite pencil lead smeared everywhere surface abused impressions lines remains erasures So finished drawing traced linen using India ink copied blueprint Ozalid process make prints mechanics Today working prints can made paper mylar just pushing few buttons Model airplane builders want precise drawings expect cut rib drawings patterns use build true wing expect cut out bulkheads produce fuselage ripples bulges objective define shape has precisely right size shape DesignCAD 2-D can make took mc years learn aircraft graphics language use drawing tools efficiently Today CAD program can learned few days allowing make drawings still wont know graphic language needed communicate mechanics unless mechanic another model builder both have built models same kind plans contrast drawing house just sketch mechanics already know build house fill walls around prebuilt things like doors windows stairs layout tools level plumb bob zig-zag ruler chalk line dont use sandpaper make things fit perfectly DesignCAD 2-D overkill making house drawings can make think about main reason making house drawing get approval build Designing Model least three ways design something I Similarity can copy something works making small changes suit needs 2 Test Draw pretty picture build according previous experience test extreme conditions After few repairs have design June1994 59 Tom Hunt aircraft Beechcraft Pucara designed CAD twin Mustang wasnt 3 Analysis have equations accurately predict results can put equations together math model programs weight balance performance stability control stress analysis come test ideas math model d eveloping design Drawing Model Airplane Lets assume want scale model some airplane Perhaps Windsoft sold compact disk containing plans photographs scale documentation Windsoft licensed produce CAD drawings Aviation Heritage exclusive Hirsch exclusive Paul Matt RCM Scalecraft Superscale will follow TIF files will available first though CAD formats will provided 300 dots per inch dpi 1/2-size same 150 dpi full size want create own design its time learn DesignCAD Step choose page large enough show details Weigh motor RC system whatever else expect build airplane As first guess Electric airplane should double weight allow structure covering Estimate required wing area dividing total weight ounces 15 result will required wing area square feet wing loading 15 ounces per square foot Fifteen ounces per square foot good number small wings two four square feet can go up 25 ounces per square foot larger wings four eight square feet Convert area wingspan chord Estimate fuselage length two/thirds wingspan Now know what size paper will need drawing preliminary weight balance calculation discover center gravity will locates wing satisfied estimate some structure hold pieces place point may want some strength analysis also called stress analysis should want know structure will strong enough stiff enough Ive left unsaid stress analysis weight balance calculations programs calculating performance stability control Right now discussing drawing program determined page size above So get books find out make rectangle size Draw print will learn draw things full-size make full-size print may require several sheets printer must pasted together make drawing end up wrong size sheet paper will know have study Step two draw plans about just putting border rough outlines wing fuselage Print see what have everything fits can make rest drawing Step three Now can use Scanover call image CD DesignCAD 2D Follow Scanover DesignCAD instructions trace drawing soon will have plan air passage surface Thats put paint point airplane company would make solid model shape put wind tunnel purpose would get some idea lift drag stability control characteristics shape Since making scale model something actually flew well skip step assume model will fly Print what have Lay motor radio equipment want carry drawing already have scale drawings equipment can call drawing move around screen fit may want move some things around change scale big advantages CAD model drawings changing scaie matter pushing few buttons like what have go back fill structure point Aerodraw 2D can help develop ribs bulkheads Build tail see estimate structural weight correct may have allow weight structure hence use different scale Easy already know make drawing different scale wing Weight OK fuselage Stuff equipment changes may necessary get right cover decorate model reinstall equipment balance should about right fly Did break Another nice aspect CAD drawings dont have work sliced-up pinholed glue-smeared drawings can print clean new ones repair session DesignCAD 2-D 3-D already available Windows version Scanover Aerodraw 2D soon will News FlashNews Flash new era modeling has dawned can have drawing published magazine format allows reader build model scale desired original might Peanut Scale modeler wants scale Software under development will rescale drawing modify structure accordingly dont need own computer Windsoft does job source expects magazine will publish drawings infinite format 1996 will scale print order software will design structure suit scale will have specify scale construction mode want sticks covering foam core fiberglass shell etc software defines environment 1996 should allow build aircraft databases CAD drawings specifically designed publication simultaneous activity get licenses reproduce model airplane drawing ever published SAM people Scale modelers should love Sources DesignCAD 2-D $34995 ModelCAD $9995 DesignCAD Resource Applications Reference Book Other products American Small Business Computers Inc American Way Pryor OK 74361-8801 Tel 918 825-4844 Ask Keith Campbell Scanover & dot matrix plotter basic $19900 Aerodraw 2D $9995 Scanned Scale Drawings pictures scale documentation CD-ROM Windsoft Co 1405 Hopkins Ave Dover DE 19901-5 174 Tel 302 678-5174 Ask Bill Windsor odel Aviation e Geist Astro Porterfield floats sort model might want rescale different motor