Mailing List flyrotary@lancaironline.net Message #29215
From: Ernest Christley <echristley@nc.rr.com>
Subject: Re: [FlyRotary] Re: Cool Tube Muffler Sound Readings
Date: Thu, 12 Jan 2006 12:52:13 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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?

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