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From: "Steve Brooks" <prvt_pilot@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: Cooling non-test
Date: Mon, 17 Jul 2006 07:49:14 -0400
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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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