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On Thu, 12 Jan 2006 12:52:13 -0500
Ernest Christley <echristley@nc.rr.com> wrote:
Bob White wrote:
>That does raise an interesting question though. At what rpm should I
>run a Lycoming to compare to the rotary at 3000? For the same prop
>speed, it should be a little over 1000. It seems that WOT static should
>be a fair comparison point for both engines. Then how much does the
>prop affect the results?
>
>Bob W.
>
How different does you car's engine sound with WOT on the highway vs lugging from a stop uphill? The truest comparison would be the same prop RPM at the same engine HP, wouldn't it? Use the same prop on both engines and measure at the same prop RPM?
Hi Ernest,
That sound like a good comparison, except that I won't ever see this
prop on another plane. It's one of a kind. The WOT static test would
be about right for noise on the airport at the start of the take-off
roll. I guess after that it's just a matter of whether I'm happy with
the noise level in the cockpit.
Bob W.
--
http://www.bob-white.com
N93BD - Rotary Powered BD-4 (first engine start 1/7/06)
Custom Cables for your rotary installation -
http://www.roblinphoto.com/shop/
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