flyrotary@lancaironline.net Mailing List Archive

Kelly,

They are slightly wider - my information is that for performance engines (read over 8,000 or 9,000 RPM, and upward of that) they skim the rotor a thou each side to eliminate binding. However that's that necessary for the rpm we are running, so they say.

It's not uncommon to skim the rotor apex areas on RX7 performance engines as well due to the high torque flexing the e-shaft.

I think Lynn's explanation seems the most reasonable to me, on why the power improves with some running-in.

My opinion FWIW

George (down under)

Tracy,

   It has been reported that the Renesis rotors are slightly wider than

13b rotors........Could there be a little extra friction causeing the longer

breakin time and gradual power increase along with the wider side

seals ??

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "Tracy Crook" <lors01@msn.com>: --------------

My Renesis was built using the same O-ring kit that RWS sells for the earlier 13B. TES inner coolant O-ring but Viton oil seal rings. Works just fine.

Just read the Car & Driver article on long term test of RX-8. They saw the same long break-in period on the engine that I did. Compression was terrific from first run on but the power increased slowly over time. The CD car was significantly faster in the 1/4 mile after 40,000 miles than when new. I still don't know why this should be. The slightly wider side seals and exhaust shield on the rotors would not seem like they would cause this much difference.

Tracy (off to Colorado for 3 weeks)

----- Original Message -----

From: Kelly Troyer

To: Rotary motors in aircraft

Sent: Friday, September 02, 2005 1:32 AM

Subject: [FlyRotary] Re: "O" rings/ Exhaust flanges

George,

    Now we need one of our Renesis engine builders to step up and prove

that the coolent seals fit their rotor housings.........Did you purchase TES

rotor seals from Creavey for your Renesis rotors ?

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from "George Lendich" <lendich@optusnet.com.au>: --------------

Lynn,

I would say my "O"rings fit pretty well and that's the Cosmo Rotor Housing - see photo.
--
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