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Thanks for the input Al. The small delta seems to be
abnormal compared to the experiences of most others so good to know I'm not the
only one. Since Ed's old prop has less pitch than my current, seems like
that would be a good test. Still planning on some intake mods, mostly to get
enough room to fit a proper air cleaner. So I'm going to focus on that
first.
Mike
Sent: Sunday, March 07, 2010 10:25 PM
Subject: [FlyRotary] Re: Performance 68x72 prop. [FlyRotary] Re: TB
size, Travel and Power
Thanks. As I've mentioned before
my static RPM is in the same ballpark (5300) but in level flight only comes up
to a max of around 5700 - 5800. So if I could bolt your prop on and get up to
6400, that would be a pretty dramatic change. The small delta between static and
level flight RPM is another reason I suspect something weird going
on in the engine limiting power.
Mike;
That doesn’t really
seem out of line to me. IIRC; when I had the 85 pitch prop the static and
max level were quite similar to what you’re getting – maybe just a bit
higher. I think a bit less prop will get you close to where you want to
be. I don’t know what the tradeoffs are between less pitch or shorter
blade; but I’m thinking less pitch is the way to go.
Of course some more
power would do the job as well.
Al
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