Hi paul,
Some questions on the alloy end plates.
 From earlier posting's there was discussion on

using aluminium end plates.

Was there not a wear problem with these and many

suggestions to use

ceramic coating.
End plate supplied by Racing Beat, what grade of

alloy is used. Are they

cast or machined from plate or billet.
Regards Don

Coatings of almost all kinds are very problematic
and that is why I suggest the
detonation gun method. If fires carbide particles at
the aluminum at supersonic
speed and they mechanically embed them selves in the
aluminum surface.

That is the main reason for the two piece end
housings. The wear surface can
be 4130 steel sheet, hardened and ground. Even
nitrided for super hard
and super low wear.

I don't know what alloy Jim at RB is using and he
won't tell me what kind of
coating he is using.

Paul Lamar

Don,
Flame Sprayed Aluminum Housings
Front Side Housing 1974-85

Racing Beat Exclusive - We offer a series of Aircraft
Grade A356 aluminum alloy side housings to replace
many of the heavier, cast iron stock assemblies found
on all 1974 and later 12A, 13B, 20B, and 13G engines.
Our housings offer both the obvious advantage of
significant weight savings and greatly increased wear
resistance, even under high horsepower demands.
Furthermore, these housings can be used in conjunction
with the stock cast iron housings, as budgets and
applications dictate.

After each aluminum housing is cast, using A356
Aircraft Alloy, it is heat treated to ?T-6? hardness
and then CNC-machined prior to being flame-sprayed and
ground to a final finish. The greatly increased wear
resistance is the result of this aerospace originated
flame spray (or plasma spray) process that imbeds into
the wear surfaces a proprietary carbide material whose
durability greatly exceeds that of the nitride surface
found on the stock cast iron housings.

for more informationand price

http://racingbeat.com/FRmazda1.htm

Daniel Gagnon

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org