Design planes

Mr Man

Mr SPEED!
You’ll also need Adobe reader to tile the plans. It is also free. Unless you get the pro version.
 

quorneng

Master member
Hmmm. They did design & build planes before PCs were around. I am really old so I still do even when using foam board.
The only thing I have to use my PC is to post pictures. comments and videos on forums like this!
 
I did a lot of paper-and-pencil designing (balsa models), then started using CAD when it became available and have used quite a few different CAD programs over the years.
I have to admit I don't do 3D work, nor do I do the kind of 'unwrapping' design many of you do. If anyone wants to do simple 2D designing, LibreCAD is available for free and will run on Windows, Apple, etc. (I use LInux Mint). Attached is a simple model I drew up for KFM airfoils, draw in LIbreCAD.
 

Attachments

  • Pursuit 360 KFM3.dxf
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Almost forgot, for model proportions, here is a set of rules published in Radio Control Modeler. Despite them being nearly a half-century old (!), they still work well.
 

Attachments

  • Sunday Flyer (Romey Bukholt) rules.png
    Sunday Flyer (Romey Bukholt) rules.png
    2.2 MB · Views: 0
Those control surface sizes don’t suit me.😏😉😂
I'm assuming you want larger surfaces, for 3-D type flying. In that case...cheat! Keep the wing and tail areas the same, but increase the control surface proportions by copying them from models you like.

Heck, the first models I designed were drawn on the back of plans I'd built, using the same areas and airfoils, but with different airframes. Just turned the plans over on a white table top and traced the important bits.

Remember that proportion guides like these were based on statistical averages of proportions for successful models. No complex aerodynamics. I modify them, as needed, when designing a model. If it's a faster model, I'll decrease the ailerons, elevator, and (maybe) rudder. If it's a slower model, I'll keep the areas at least the recommended size, but I often increase the fin and rudder areas (I like to do slips and spins).
 
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