"Stealth Pilot" wrote in message
...
On Wed, 7 May 2008 19:34:20 -0400, "Ed Huntress"
wrote:


"Terry Keeley" tkee(no wrote in message
...
Having the fin as thin as possible is the most important, then weight
and
strength. Looks like a heat-treated Ti alloy is in fact the best
choice,
other than some "unobtainium", LOL!

Thanks again for all your help, my goal is to travel our 330' course in
1.8 sec!

Well, good luck. Let us know how you do with it.

can you work harden titanium by hammering it to shape?

Titanium alloys in general don't work-harden very much. Some, hardly at all.
The stronger titanium alloys are hardened by precipitation hardening, much
like aluminum and the precipitation-hardening stainless steels (17-7PH,
A-386, etc.).

--
Ed Huntress