Hi Guys

Ive finally got the engine (Renesis) and cowl complete on the Glasair.
Now without a prop I can run her (1500rpm, 90 deg F ambient) for about 10 mins before water temps teach 200 deg F.
Hoping that with the prop she will keep her cool.

We have sought to protect the inner cowl surfaces from exhaust radiant heat and this appears to be functioning
however I’m surprised at the upper cowl external surface temps after shut down getting to hot to touch.
What are your experiences of cowl temps after shutdown?
If air-cooled engines run up to 400 deg F CHT’s how do they go?
I take it we all have glass cowls!

Steve Izett