This is a listing of CAD drawings sent in by builders. We know that there are some more, if you come across them please send us a note and we will provide them here.
|gussets-rev1.zip||Drawings of all gussets. Created by Bob
|al_sheet1-2.dxf||The basic pieces needed for
the fuselage, laid out on a 48 X 144" 0.063" 2024 T3 aluminum sheet.
Since laying out this sheet, I have learned a little more about bending aluminum. The bending allowance for a 1/4" radius bend in 0.063" aluminum is 0.186". For a 3/8". For a 3/8" radius bend, the bending allowance is 0.240". So for 1/4" radius bends on a 1X1 angle, should be 2 - 0.186 = 1.814 or about 1 13/16. For a 3/8" radius, 1.760 or a little over 1 3/4". Please adjust accordingly.
Reference: "How to Do Aircraft Sheet Metal Work" by Norcross and Quinn, 1942, pp 95
|sk21-rib.dxf||A drawing of a rib panel. Based on drawing SK-21 "PANEL RIB (ALUMINUM)" overlaid over the 64-415 airfoil coordinates. Dimensions are good to approx. +/- .022", airfoil is drawn on outside edge of ink line and within +/- .006". (This amount of error only at the leading edge due to length of line segments used. Much closer elsewhere).|
|panel.dxf||Drawing of the instrument panel (to plan the instrumentation).|
|v6cowling.dxf||Shows a Ford V6 engine and a Blanton PSRU in a stock BD-4 cowling.|
|enginemountbracket.3dm||Not a CAD drawing, but a Rhino file; here a PDF printout with a photo of the finished part (sans hole). With that you could order it from a local shop.|
|n239cp.3dm||Rhino 3D model (for questions ask Holger)|
|airfoil_good_one_honeycomb_rib.dwg||This autocad drawign for a honeycomb rib was provided by Louis Bigelow|
|airfoil_good_one_honeycomb_rib.dxf||DXF file for the honeycomb rib. There are sometimes problems with dxf conversions so check against the plans before relying on this file.|