Thanks people.
I suppose i should measure the temps and check against the glass specs, but perhaps all OK.

Steve


> On 12 Jan 2015, at 12:53 am, Mark Steitle <flyrotary@lancaironline.net> wrote:
>
> Steve,
> The cowl on my 3-rotor would get too hot to touch after shutdown. I coated the area around the exhaust with a layer of Fiberfrax... Problem solved.  Some builders have used aluminum foil to reflect the heat away from the fiberglass cowl.  
>
> Mark S.
>
>
> Sent from my iPad
>
>> On Jan 11, 2015, at 7:24 AM, steve Izett <flyrotary@lancaironline.net> wrote:
>>
>> 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
>>
>>
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