| Thanks Bill AS the other guys have asked, do you have photos of the cowl both internal and external? Cheers
Steve On 19/04/2011, at 9:29 AM, Bill Bradburry wrote:
Steve, That is correct. I have a dragster scoop mounted under the
cowl that has an opening that is roughly 13 inches by 3 inches. About 4 inches
of the inlet is directed thru a 3 inch scat tube to the radiator and the
balance goes to the oil cooler. Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of stevei@carey.asn.au
Sent: Monday, April 18, 2011 9:13
PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Finally!
The temps are under control!
Hi Bill
Can we confirm your setup.
5.5" diameter nostrils = 23.8 sq inch per side.
You have a total of 70 sq inches in so you have another entry apart
from the nostrils?
On 19/04/2011, at 3:23 AM, Bill Bradburry
wrote:
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
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