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Bob,
When I did my ground runs, I used a furnace blower to provide cooling. It
moves a whole lot of air compared to a leaf blower, though not as high of
speed air, but certainly lots of volume. The other nice thing is that the
blower has a round outlet (about 8" I guess), so it would be very easy to
clamp a piece of flexible duct to it.
I just pointed it at the cooling scoop, about 4-5 ft. ahead of it. It
allowed me to run the engine about twice as long at higher power levels than
I could without the blower. I though about ducting it in as you did, but
never did it. I was going to put in a "Y" fitting to run about 1/3 of the
output to the oil cooler, which for me is on a separate scoop.
It's also really useful when working on the plane during hot weather to cool
the builder off.
Steve Brooks
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Bob White
Sent: Sunday, July 16, 2006 3:15 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Cooling non-test
On Sun, 16 Jul 2006 13:46:57 -0400
Ernest Christley <echristley@nc.rr.com> wrote:
Bob White wrote:
>I put the tip of the manometer a foot or two directly in the cone of the
>apparatus (what else can I call it?) and got a pressure of about 1 inch
>of watter. Putting it directly in the end of the leaf blower was about
>3 inches. So I need a bigger leaf blower!
>
>
Or several. Ask a couple neighbors if you can borrow one for a few
minutes. I measured the air exiting mine at 80mph. Once I get my oil
and water coolers integrated, I'm going to walk down the street asking
everyone to borrow theirs. Line them up in front of the wing and turn
'em loose. You could get three in that box without much trouble.
I must have a wimpy leaf blower. I think the measurement I made right
at the nozzle of 3" h20 is about 80 mph. That wasn't uniform over the
opening either, so the average would have been less.
Bob W.
--
http://www.bob-white.com
N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
Custom Cables for your rotary installation -
http://www.roblinphoto.com/shop/
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