I don't have an opinion. I just want to learn. Come back and cast some
more pearls ....

Meanwhile, I did find out a couple more semi-official FAA opinions:

http://www.faa.gov/avr/afs/news/arch...2002/Parts.htm

http://150cessna.tripod.com/obrienonownermadeparts.html

Again, the gist seems to be that owner made parts have to be based on
approved data of some kind. The owner can't just roll his own, no matter
how much better it is, without a field approval.

"Jim Weir" wrote in message
...
Ya know, this has all been great fun, but a huge time sink. I'll take the
thread up again next weekend, but I won't waste valuable engineering time
with
folks who have an honest difference of opinion. Opinion, mine as well as
yours,
are like assholes...everybody has one and most of them stink.

See ya after hours...

Jim
Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com