It is called MA 956.
Since the rotary exhaust temperatures are up around
1800 F it will be needed. One can always cool the exhaust
before it goes to the turbine but that implies a loss
of recovered energy.


Paul Lamar

       Ok, that was an excellent tease, what are the characteristics of the
       alloy? The weight savings? Is this alloy better than
       beryllium/aluminium? How easy is it to machine? Cost?

       Steve Ross

       I forgot the attachment. The message before this one will have it

       If not, I attached it here again and a pdf. BeAl is only good to 700F.
       The density of MA 956 is less than steel.

       I have no answers to the rest of the questions yet.

       Paul Lamar

       I just read the attachment, it looks promising! I am going to
       enquire about pricing on Monday. How big of a billet would be needed
       to carve out a rotor?

       Steve Ross

       I did not have rotors in mind. I had turbines in mind. Rotors do not run
       much over 500 F. BeAl at 700 F would work great for rotors as the
       density
       is only .07 pounds per cubic inch. Aluminium is .1 pound per cubic inch.

       In theory a BeAl rotors would allow 20,000 RPM. Then we would have a
       gear
       box problem. The weight of the engine would become about 180 pounds,
       instead of 200 pounds, with turbo because when you lighten the
       rotors the
       counter weights become lighter as well.


       For  turbo compound use the same turbine that boost the manifold
       pressure can feed torque to the e-shaft. See the attachment.

       The same power to weight ratio, or better, as a turbo prop with half
       the fuel burn.


       Paul Lamar



Excellent stuff, I am already talking with my builder about implementing a lot of the things discussed here into my project. We are doing plug relocation/slot modifications ( ernie brink mods ) along with combustion chamber shape changes. With the mass reduction of the rotors, the rotary can finally be unleashed, with compounding taking the efficiency next level. I am truly excited for all of us that believe in this engine design.

   Steve Ross


ernie brink is not sufficiently  educated on the rotary. There is little or no pressure
difference in the area of the spark plugs so any type of slot will not help.
See the attached jpg out of Kenichi Yamamoto'e book "Rotary Engine".

You can download the book from this web site.

http://www.rotaryeng.net/interesting.html

Specifically:

http://foxed.ca/index.php?page=rx7manual

Scroll down as it is down near the bottom of the page.

There is a wealth of information in there and everybody
should down load it and read it.

Paul Lamar

 The Rotary Engine News Letter. Powered by Linux.
If you want off the list PLEASE let me know and I will
remove  you.  ACRE NL web site. http://www.rotaryeng.net
You Tube http://tinyurl.com/beqqxas
Copyright 1998-2016 All world wide rights reserved.