Paul, no problem to 9000 rpm.
 But you should never need anything that high in an aircraft!
  From one of the threads, "3ms will net around 115mj".
 Price is higher, about $75 each.
 Barry

 The rotary is a high RPM engine. 3.12:1 PSRU's are in the works.

 Paul Lamar


 Paul,
 I think you will want to avoid continuous operation in the 9000rpm
 range because of the tooth loading on the stationary
 external gear. (Yamamoto '71, p.49)
 ( see attached)
 Barry

 Very good Barry. I like to see references for claims made.
 Thanks

  They have made some advances in this area in 1984.
 This is from SAE 841017. The solution was trivial and very low cost.
 They added 3 small roll pins.

 The paper is available on the web site.

 http://www.rotaryeng.net/1984-recent-tech.pdf

 Page 9.

 Paul Lamar

Most rotary engine machine shops recommend the roll pins or circlips, as mentioned, hardening treatment of the stationary gear http://atkinsrotary.com/store/13B-Rear-Type-I-Hardened-Stationary-Gear-10015.html  as well as bearing and rotor clearance for engines that run above 8500 rpm. Speed costs !!!

Graeme Riley

Most of that is done on the RX8 engine. The red line is 9000.
I think the gears are a bit wider as well.

Paul Lamar

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