RPM alone doesn't prove anything, but yes, I got 6400 RPM with the
2.176 : 1 drive ratio and 7300 RPM with the 2.85 : 1. I beat several
O - 360 RVs with both setups.
Ed / Jerry,
I stand corrected. Let me say that 'the 13b power I see being
achieved so far in NA 13b airplane installations seem to be less than what
O-360 guys are getting'. After mounting props was
anybody able to attain even 6000 rpm in their 13b NA aircraft installation,
level-flight?
Tom
Jerry Hey <jerryhey@earthlink.net>
wrote:
I assume you are talking about a 6000 rpm limited rotary vs a wide open
0-360. Run the rotary faster and thats the end of the story.
Jerry
Ed Anderson wrote:
> Tom,
> I don't
really think anyone can accurately make a generalization like
> that.
> From: Tom
> It's my understanding that NA non-renesis rotary
installations
> produce less power than 360s, Perry Mick might
have a word on this.
> Eric Ruttan wrote:
> A 360 Lyc
does not produce the same power as a rotary.
> If true, then the Ellison
card may not get enough air.
> If not true, then there is no real reason
why the Ellison cannot feed a
> rotary.
>
> Ed, I understand
your math, but even if the local inlet velocity is much
> higher, we
dont care. the velocities adverage out to the same, as the
> volume of
air = velocity * carb area.
>
> If the velocities are higher, the
rotary consumes more air, and makes
>
more power.
>
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