That rotor is from the Ingersoll Rand natural gas engines that were made in
the 1970's. Displacement was 2500 cu inches, power was 500 hp per rotor (I
think), available in single and twin rotor configuration. I don't remember
the operating speed, perhaps 1000 rpm. The engines were in production, and
many ran to 40,000 hours. I understand that one is just coming out of service
now. They were used primarily to drive natural gas compressors.

By the way, the rotor was cast iron. I used to have an apex seal from one. It
was an excellent paperweight.

Jon Lauter
Rotary Power Marine Corporation
www.rotarymarine.com

Jon gets the prize. Free gift certificate good for one free subscription to the ACRE
NL.

Paul Lamar

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