What was that beryllium/Al alloy mentioned here and where I can find its
chemical composition and mechanical props?

Ted


I received a quote on 8 inch diameter by 2 inch thick blanks of beryllium /
aluminum AMS162H from Brush Wellman for an injector application. They were:

US $4631 for 1 piece

Or

US $4384 for 3 pieces (Total $13,152)

I don't know how that compares to a blank size needed for a rotor but it's
probably close in material volume.

Strategic use of expensive materials for significant performance increases
and or weight reductions:

As an aside here is a break down of the weight performance and cost
comparison for the AMS162H compared to traditional materials used for rocket
engine injector. It shows that while more expensive, the performance is
outstanding for the AMS162H and compared to all of the other costs of the
rocket engine is really not that expensive.

AMS162H - Blank cost $4600
Total engine cost including nozzle etc ~ $20,000

Final injector part weight - 2.54 lbs

The operating temperature of AMS162H is almost double that of aluminum
allowing its use while aluminum alone tends to burn the injector face,
yielding either failure or very few operating cycles.
-------------------------------

C 145 tellurium copper - Blank cost $1300
Total engine cost including nozzle etc ~ $16,700

Final injector part weight - 8.55 lbs
-------------------------------

Inconel 718 - Blank cost $1300
Total engine cost including nozzle etc ~ $16,700

Final injector part weight - 7.29 lbs


Cheers,
Brian
--------------------

Brian Feeney
DreamSpace and The da Vinci Project
bfeeney@davinciproject.com
http://www.davinciproject.com

Wow! I knew it was expensive but I did not know it was THAT expensive.
Perhaps Ted in Russia can come up with a better price. Still cheaper
than a Formula 1 engine however.

Here is something that might work for a rotor but it is not near as
expensive.


Paul Lamar