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[FlyRotary] Re: : 13b vs 360
performance
The Coot is a whole different
bird than most of you are flying but for comparisons I have flown with
another Coot with an IO-360 and I can blow him away on takeoff out of
the water but I am cheating as I kick an extra 100 hp with the nitrous
to lift it out of the water, on climb out he will blow me away as my
prop is fixed for cruise and he has a CS prop, in cruise we are a dead
match when I am running at 6500 rpm < gear ratio is a 2.95 to 1
>.
Ken
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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