From: "Mark Steitle" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] cowl temps
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Date: Sun, 11 Jan 2015 10:53:38 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Steve,
The cowl on my 3-rotor would get too hot to touch after shutdown. I coated t=
he area around the exhaust with a layer of Fiberfrax... Problem solved.  Som=
e builders have used aluminum foil to reflect the heat away from the fibergl=
ass cowl. =20

Mark S.


Sent from my iPad

> On Jan 11, 2015, at 7:24 AM, steve Izett <flyrotary@lancaironline.net> wro=
te:
>=20
> Hi Guys
>=20
> 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 m=
ins before water temps teach 200 deg F.
> Hoping that with the prop she will keep her cool.
>=20
> We have sought to protect the inner cowl surfaces from exhaust radiant hea=
t and this appears to be functioning
> however I=E2=80=99m surprised at the upper cowl external surface temps aft=
er 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=E2=80=99s how do they go?
> I take it we all have glass cowls!
>=20
> Steve Izett
>=20
>=20
> --
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