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Ron Lendon's Aircraft Mfg.
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Date:  12-2-2008
Number of Hours:  2.00
Manual Reference:  6-B-3
Brief Description:  Planning layout of bottom skin rivet holes

I am scratch building and wanted to confirm my best guess on the rivet spacing on the bottom skin. It looks like the perimeter (longeron) edges spacing could remain a constant of 9.5mm.

The other question is are the dimensions from front to back 235, 225, 245, 270 rivet centerlines? The next dimension 560 is the cutout edge and not the rivet centerline. The we have 400, 400, 400, 340 which appear to be on the rivet centerlines.

I want to layout the entire bottom skin rivet holes and cutouts but am a little unclear of the actual dimensions shown on the print. If I make all the dimensions to the rivet hole centerlines then the 560 cutout will be more like 540, probably not a show stopper just don't want to make a mistake.

The date on the print is 8/05


My reading of the drawing is that the 560 dimension is the cutout, not the rivet centerline.

Jay in Dallas
Do not archive

That's my reading also. However if I stack all the dimensions +10mm for the rear rivet line spacing I get the total dimension of the length of the bottom skin. 235+225+245+270+560+400+400+400+340+10=1385
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