September 06, 2004

Metrology


Just getting started on the metrology work-out to make sure the wings are not swept (forward or aft) and to set the wing incidence. I've got to get some string and make up another plumb bob to check the leading edge of the wing for sweep. The left wing looks to be set to the required incidence measurement (3 inches) between the front and rear spars to within a 1/64 of an inch i.e. about 0.015 inch.

I'm planning on making a drill jig to clamp the rear spar and associated bulkhead together and make up a series of drill bushings so I can get the hole (a) straight, (b) the right diameter, and (c) with the correct and critical minum edge clearances...