X-Mozilla-Keys:                                                                                 

Chuck Harbert  wrote:

Paul, I was advised that for a rotary engine that ceramic coating of the the
turbo was probably not a good idea because it would prevent heat transfer from
the turbo. With the already high temps from a rotary (1,500-1600+), you're
trying to keep turbo temps from melting the impeller tips, so increasing the
housing temp creates potentially bigger problems. Seems to make sense.

I did coat my inconel exhaust manifold and the SS exhaust pipe to reduce under
cowl heat transfer to engine components. I used the Chemichrome coating which
you can buy (<$20) from Air Spruce. It's the same stuff that the local coating
company was using. It's a water based spray on application that you bake in your
oven afterwards. It seems to be holding up well, but getting it clean and rough
sanded initially is the key. You buff it afterwards to make it look like like
bumpy chrome.

Chuck

Thanks for the tip Chuck. I was getting ready to order my turbo charger.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org