Reply-To: <steve@tsisp.com>
From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: opinion
Date: Sun, 6 Jun 2004 21:07:15 -0400
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John,
The 1-3/4 is from the fuselage to the inside of the scoop.  Measuring from
the NACA which is recessed would be about another 1-3/4 for a total of
3-1/2".  Maybe I didn't explain that very well.


 -----Original Message-----
From: 	Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]  On
Behalf Of John Slade
Sent:	Sunday, June 06, 2004 7:58 PM
To:	Rotary motors in aircraft
Subject:	[FlyRotary] Re: opinion

> the inside of the scoop measures 1-3/4" high by 15-3/4" wide.
That's strange. My NACA scoop is built per plans. How come yours is 1 3/4
wide? Are we measuring the same thing? From the floor of the scoop to the
inside edge of the airfoil mine measures 3.25 * 15.4 for a total square area
of about 50 sq inches. I don't have any additional scoops and so far my
cooling seems adequate.

> Today when flying straight and level, when I increased
> throttle, and increased speed, I also increased in oil and coolant
> temperature, which tells me that I don't have enough air flow, or
> velocity, or pressure, or whatever the correct term is.
I think this would be expected. Increase power and temperatures will go up,
at least initially. Does it stabilize at an acceptable temperature, or does
it continue to climb?

> As it turns out, I have some time to work on the scoop, especially since
> I'll be doing a little fiberglass work anyway.
You could be going in the wrong direction here, Steve. I didn't do much in
the way of contouring the intake areas, but I did make a bit of a duct.
Maybe that's helping. The augmented exhaust may also be contributing.

I'd suggest more testing at different speeds and outside air temps before
hacking at the scoops.
Regards,
John


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