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[FlyRotary] Re: : 13b vs 360 performance
Ken,
I thought it may have been something
else.
Leon mention e-shaft flex causing to rotors to skew
in the housing, under high load (I thought of the NOS). One fix
was shaving a little off the corners, as you did.
The real fix is 2 piece shaft as they are
stiffer.
George ( down under)
----- Original Message -----
Sent: Friday, February 11, 2005 8:39
PM
Subject: [FlyRotary] Re: : 13b vs 360
performance
Yes I invested in good oil lines and I
got rid of the Ross gearbox, when the thrust bearing on the engine goes out do
to the ross gearbox the oil pressure drops to about 10 or 20 psi and the rotor
seizes,
After switching to the cog belt redrive I
stacked up 900 hrs with no problems until I blew an oil line last
summer.
Ken
Ken,
Did you ever work
out why you had problems with the rotors seizing.
George ( down
under)
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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