From: "Jeff Whaley jwhaley@datacast.com" <flyrotary@lancaironline.net>
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Subject: RE [FlyRotary] first Flight of Glasair - finally
Thread-Topic: RE [FlyRotary] first Flight of Glasair - finally
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Date: Mon, 12 Aug 2019 12:17:50 +0000
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Congratulations Steve - a major milestone accomplished.
A couple things: yes, the increase in airspeed will help : 110k - 150k is a=
bout 36%; will be interesting to see if your cooling follows in linear fash=
ion.  Too much pressure in the cowl from an undersized outlet is highly unl=
ikely - to over-pressurise (a balloon or tire) it takes both a sealed inlet=
 and a seal outlet - the cowling will flow as much air as it can; the rest =
will simply never enter the openings.  On the other hand, if you have leaks=
 into the cowling that are not part of your cooling ducts this DOES increas=
e pressure under the cowling and will work against the low pressure area ne=
eded behind your heat exchangers.
Good luck and keep up the posts as you move forward ... Jeff

Hi People

The Glasair has finally left the ground and had a successful first flight.
I've attached a graph of the data. OAT was 63F
I was really very pleased given our smallish 20in2 coolant inlet area and <=
9in2 oil inlet area for ~190hp.
The temps are a bit hot (~220F) but we didn't go beyond 110 knots. I suspec=
t when we get the airspeed up above 150knots into her nose we'll see some i=
mprovement.
My hunch is we might have too much pressure in the cowl. The exit air area =
is approx. 30in2.

Appreciate any of your thoughts from the first flight data.

Cheers

Steve Izett
Glasair Super II RG Renesis 4 port RD1C EC3 EM3