prop pitch

From: Neil Dennis <wombatt_at_gmail.com>
Date: Wed, 15 Dec 2010 17:47:24 -0500

John, that is NEAT, So easy - after I slaved over a spreadsheet with a
batch of calculations to get a helical angle layout for my "warpeer".

tnx, wombat
Received on Wed Dec 15 2010 - 14:47:42 CET