Hey Paul,

I heard about a material called Titanium Aluminide. It can be forged
and machined. It's light and can withstand high temperatures. Maybe it
would be a good material to make some 20K RPM rotors from?

http://en.wikipedia.org/wiki/Titanium_aluminide
http://www.precast.com/

Mark LaPierre

It is higher density than aluminum at .144 pounds per cubic inch.
Aluminum is .1 pound per cubic inch. Iron is .3 pounds per cubic inch.
The really trick alloy for rotors is beryllium aluminum at .07
pounds per cubic inch. Half the weight of Titanium Aluminide.

Paul Lamar

It's BA is probably much easier to fabricate than TA too.

 Mark LaPierre


Titanium aluminium is more readily available, it would be Worth while to
try it (M.H.O).
Maybe those guys who were looking to do something innovative with the
rotary engine
could build a gama aluminide one rotor ;proof of concept FWF for a
Ran's s-19 for example.
P.S. what's up with them anyway?

-clifton younger-

You won't get 20K unless the density is much less than aluminum.

Paul Lamar

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