Tracy,
Nothing! It didn’t exist!
The right nostril, 5.5 inch diameter, and
a 3 inch scat tube, which came off the oil cooler inlet, was all the cool air
inlet I had coming to the radiator. When I added the 4 inch scat tube
from the left nostril, it started to cool.
I now have 27 sq inches of opening feeding
the oil cooler, a total of 43 sq inches of opening feeding the radiator. The
cowl outlets total 110 sq inches. So 70 inches in and 110 inches
out. Pressure inside the cowl is running about 5 inches of water. If
I found myself in cooler weather, I might be able to make the last cowl exit
opening adjustable (cowl flap). With the current and soon expected temps I
would never be able to close it, so no pressure to make it adjustable right
now.
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy
Sent: Monday, April 18, 2011 2:05
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Finally!
The temps are under control!
Hi Bill,
I would have thought 4" scat tube would be on the small
side. What was it before?
Tracy
On Mon, Apr 18, 2011 at 9:45 AM, Bill
Bradburry <bbradburry@bellsouth.net>
wrote:
I installed a 4 inch flex tube to bring air from the left nostril
over to the radiator and that solved the problem! Water temps climb to
around 208-9 or so on take off and then they lower to the mid 190s. Oil
is running about 175. Now that I can fly without the fear that I am going
to lose the temps, I can concentrate on the checks I need to do during the 40
hour flyoff! Oat was bout 88 degrees.
I am flying off a Class C airport, so temps are always high before
I take the active.
Bill B N249B