[NSRCA-discussion] 90 size pattern plane

[John Ferrell]

A Perry Pump will solve the mixture problems with a Pitts muffler but they 
still are very noisy.

John Ferrell    W8CCW
"Life is easier if you learn to plow
       around the stumps"
http://DixieNC.US

----- Original Message ----- 
From: "Fred Huber" <fhhuber at clearwire.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Saturday, July 14, 2007 8:59 PM
Subject: Re: [NSRCA-discussion] 90 size pattern plane


> Pitts muflers can be problematic.
>
> Most are designed for loks rather than function.  If you have not dealt 
> with
> them before do not use one on a pattern plane.
>
> Typiclly I end up having to plug one exhaust tube almost completely (just
> leaving a 1/16 inch drilled hole to let oil out) and the other hole gets
> partially plugged. This is due to the Pitts style not having much if any
> backpressure.  They typically have double the exit diameter for each tube
> compared to the single outlet tube of a stock muffler.
>
> You're better off using an exhaust extension and letting the standard
> muffler hang out in the slipstream if there's problems making the stock
> mufler clear the firewall.
>
> NEVER break an engine in using a Pitts muffler.  You'll never know if its
> the muffler causing trouble or if the engine has problems.
>
> ----- Original Message ----- 
> From: "Jim Alberico" <alberji at charter.net>
> To: <nsrca-discussion at lists.nsrca.org>
> Sent: Saturday, July 14, 2007 3:17 PM
> Subject: Re: [NSRCA-discussion] 90 size pattern plane
>
>
>> Greetings.  I'm the club member mentioned by Ed.
>>
>> Jay Marshall's suggestion looks like a potential winner, the Hangar 9
>> Evolution 90 4D.  The SFG's are easily removable when not appropriate.
>>
>> Turns out the MA that just arrived mentions that model as a
>> beginner/practice choice.
>>
>> I'm guessing the recommended 2S Evolution 1.00 NX is plenty of power for 
>> a
>> beginner on a budget.   Thoughts?   Remember: (sportsman + beginner +
>> budget).  :-)
>>
>> Other threads seem to say the stock Evolution muffler will not fit.  A
>> Pitts muffler, such as from Bisson, is suggested.  Additional thoughts
>> from this community of experts will be appreciated.  Thanks!
>>
>> Jim
>>
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>>
>>
>>
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>
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