New here

A forum about all aspects of the construction and maintenance of the Billy Dawson inspired modified Hatz Classic biplane. Here is the place to ask your questions and get the answers from the real experts.
jwhanson
Posts: 96
Joined: Tue Mar 16, 2010 11:55 pm

Re: New here

Post by jwhanson »

I used a CAD program that I had and organized the parts to fit on 9 x 18 inch sheets. I stacked the sheets that required multiples of the same parts and tack welded
the corners. I placed a piece of carpet tape between each of the sheets in the location of each of the parts so they would stay together during the water jet process. I was able to stack four .090 sheets. The operator then only had to make one pass for multiples of the same part. In CAD I placed a 1/16 hole on each hole center. The water jet operator said this would significantly reduce the run time over cutting the holes full size. I later drilled and reamed the holes myself using the 1/16 hole as a pilot. He ran the machine at 60% speed. He completed all my parts in about 1 hour. I only had to smooth the edges with 220 sandpaper.

John Hanson N167Q HC-012
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