[NSRCA-discussion] 2C Pipe vs Muffler

[Dean Pappas]

I am with Matt on this one!
Don't trust ground numbers too much.
You don't fly your plane sitting still on the ground, do you?
Dean P.

	-----Original Message----- 
	From: nsrca-discussion-bounces at lists.nsrca.org on behalf of Rcmaster199 at aol.com 
	Sent: Mon 3/6/2006 7:59 PM 
	To: nsrca-discussion at lists.nsrca.org 
	Cc: 
	Subject: Re: [NSRCA-discussion] 2C Pipe vs Muffler
	
	
	
	In a message dated 3/6/2006 6:57:30 PM Eastern Standard Time, jeffghughes at comcast.net writes:

		was going through the data on Ed Hartley's 2 stroke page and noted that there is virtually no difference between a piped OS1.40 and a muffled OS1.40 for the prop sizes being used.  I assume that is because to get a nice linear throttle curve on a pipe, the pipe is deliberately set too long for peak horsepower. My question is why run a tuned pipe at all if you are going to set it too long for peak power?. Has anyone run back to back tests with same engine and plane with a pipe vs a muffler to see if there is truly a difference in power or feel?

	Yes and there is
	 
	MattK

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