<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
         <<  Lancair Builders' Mail List  >>
         <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>

In response to Walter Dodson's request
http://www.geo-mark.com/320/nasa-duct.htm gives an interesting article by
Ben Owen from Sport Aviation December 1991. I mentions tables which on
checking back through my old magazines are indeed printed in the article. It
also mentions the original research notes which are apparently available
from EAA for a small sum.
I had it all on a spreadsheet so it would give me coordinates for any size
duct but can't find it I'm afraid. Lost in the bit bucket!
Most of the pre-moulded ones appear to be shaped for ease of moulding rather
than accuracy - I made plugs from timber, put duct tape wherever the duct
was going, stuck the plug in place, used modelling clay to fill any gaps and
glassed over it with 2-3 BID which gave me a duct with a nicely conforming
mounting flange. Hardest part was getting a nice crisp corner between the
ramp and the sides. May have to square up the corners with micro on the
finished product.

Good luck

Graham Nutt

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.