IowaRV9Dreamer
Well Known Member
Can I dimple my aileron spar A-903? I dimpled my wing rear spar W-907 with no ill results. I know they are shaped a bit differently (slightly different angle) but my small diameter dimple die seems to fit in there ok.
The manual is no help here:
In the Wing Skin Preparation & Assembly section of the manual, it says Dimple the 0.040" rear spar and "ream out" the dimpled holes slightly with a sharp deburring bit or machine countersink. This "reaming" operation removes just a small amount of metal to make the skin dimple fit better and is not critical...
Yet in the aileron section, the manual states Machine Countersink the A-903 Spar Flanges (this will prevent bowing the spar that can be caused by dimpling since it is 0.040" thick).
Why the difference? Has anyone tried this?
The manual is no help here:
In the Wing Skin Preparation & Assembly section of the manual, it says Dimple the 0.040" rear spar and "ream out" the dimpled holes slightly with a sharp deburring bit or machine countersink. This "reaming" operation removes just a small amount of metal to make the skin dimple fit better and is not critical...
Yet in the aileron section, the manual states Machine Countersink the A-903 Spar Flanges (this will prevent bowing the spar that can be caused by dimpling since it is 0.040" thick).
Why the difference? Has anyone tried this?