Can't read plans!!!
 

Could someone please help me read these plans. You can get to the plans by following the link below.

1. What thickness balsa should I use for the wing ribs (trainer config-page 3).
2. What thickness balsa should I use for the elevator.

The plans are in DWG format. Clicking to the link below will download the file ZIP.

[link]http://www.balsadust.net/thomas.vogel/Files/Plans//RC/Scale/p51b-pony.zip[/link]

If you don't have a program to read CAD files there are many free readers on the internet, just go to google and type "free DWG file viewer".

Thanks

RE: Can't read plans!!!
 

You will get an answer quicker if you post this in the Scratch Builder's forum. Good luck.

RE: Can't read plans!!!
 

I gave them a thorough look over. The dimensions simply are not there, anywhere. Was there a part list or text provided with the plans? About all I saw called out was some doubler thicknesses and a couple of other small items. Marginal plans at best if that is all you have.

RE: Can't read plans!!!
 

As I interpret the plans, the wing ribs appear to be cut from 1/8" Balsa sheet. You might consider using 1/8" aircraft ply for the inner 2 or 3 ribs on each wing. The control surfaces, (elevator, rudder, horizontal and vertical stabs) appear to be built up from 1/4"x1/2" balsa sticks, with an inner layer of 1/16" balsa sheeting. After its built up, it is sanded to the final airfoil shape shown on the plans.

I obtained these dimensions by opening the files in a drawing program and using the dimension feature in the program to make the measurements.

Brad

RE: Can't read plans!!!
 

I opened these up in autocad and by using the demension function it gives the ribs as 1/8 " thick,same for the stab ribs and framework,I do not see any inner sheeting.there might be some confusion as that is near the tip and shows the 1/8 balsa frame with 1/4" scrap glued to it to make the tip

RE: Can't read plans!!!
 

If you look at the profiles for the elevator, rudder, horizontal, and vertical stabs, you'll see a 1/16" gap between the upper and lower sticks. It looks like there is a top and bottom frame. The only way I can see this structure being stable is with the 1/16" sheeting or plywood between the top and bottom.

Alternatively, there might be 1/16" stringers running fore and aft, but without cross bracing, it would be pretty flimsy.

Brad