Hi- not sure if this is the correct email address,
 but would like to find out more about the aluminum rotors?

 Charlie Pilkington Since somebody let the cat out of the bag at
 SevenStock-2010
 this is an indication of what you are going to have
 to deal with Jeff & Dave :)What is the status of the test
 engine?

 Photo's by Todd Archer.

 Paul Lamar

  Hi- not sure what you mean exactly? Are they not finished yet?
  I have a Mazda RX7 FD, and am looking and making a special engine for it
 next year!

 Charlie Pilkington

  It was supposed to be a secrete project until we had time to test it on
 the dyno.

  Paul Lamar
  --
  Looks like the Cat is out of the Bag! I'd love to have a set when
  I build my engine.  Will they fit a 13B? My plan is to purchase
  aluminum housings from Racing beat... Aluminum Rotors would be really
 nice.

  Mike C.



 http://www.rotaryart.uk.com/acatalog/East_Coast_Parts_engine_tuning_accessories.html
 Having trouble understanding some of your emails, some seem unrelated
 Charlie Pilkington

 I put you on our world wide rotor head newsletter list Charlie.
 If you want off let me know. We don't really answer question from
 individuals. We share answers with everybody.  Also we do it differently
 so you will have to scroll down to see the new messages. Also read
 the web site below.

 I am familiar with the East Coast solid aluminum rotor but there
 is no internal cooling. Might be OK for a drag car as rotor cooling
 is not a real issue in 10 seconds or less.

 BTW if you know Emon Hurley in Coventry tell him I said hello.

 Paul Lamar

Paul,  The 4 rotor E-shaft in the picture seems to go against the majority
opinions for this part. Only 3 shaft bearings for four rotors, no center
counterweights, and the center two eccentrics at 90 degrees rather than 180
degrees which introduces higher cyclic loading of the shaft connection.
     If you use light rotors either aluminum or  beryllium/aluminum
(unobtanium) and have appropriate counterweights won't the higher RPM require
more PSRU reduction. Looks like double planetaries in series.

george grimes

Emon is like that :) A large part of his business is building
three rotor 12A based engines and installing them in RX7's in the UK.

A four rotor engine is almost self balancing. Only small
counter weights are required at each end.

Well the light weight rotors were intended for certain classes in
road racing where they are not yet specifically outlawed.
If the SCCA gets wind of it they will slap an RPM limit
on rotary powered race cars.

Not so much in aircraft other than a bit less weight for one rotor
Mazda's. Weight will be saved for the counter weights as well as the
rotor itself. It could cut about 10 pounds out of a Mazda one rotor.

BTW 20% of the cars at the SCCA run offs had Mazda rotaries in several
different classes. That is over 100 cars.  If they were not handicapped
to such a large extent 50% of the SCCA race cars would eventually wind  up
with rotary engines IMHO. That current 20% of rotaries is far far higher
than the percentage of Mazda rotaries in the general car population.
The reason is the extreme durability and long life of the rotary engine
and the ease of overhaul.


Paul Lamar