He's right about not to far. But if you don't drop them a couple of inches 
it will burn paint and blow black on the belly. I had mine come out at the 
back of the cowl at an angle. Then I cut the exhaust so it would blow 
towards the back


----- Original Message ----- 
From: "Donald Reid" <[email protected]>
To: <[email protected]>; "KRnet" <[email protected]>
Sent: Wednesday, January 26, 2005 6:59 PM
Subject: Re: KR> Exhaust


> At 04:10 PM 1/26/2005, you wrote:
>>Are there any rules of thumb of scientific formulas that would determine
>>the length that the exhaust tubes should extend below the belly of the
>>airplane.
>
> If at all possible, the exhaust should not extend beyond the surface of 
> the
> plane.  Any protrusion will be a source of drag.
>
>
>
> Don Reid  -  donreid "at" peoplepc.com
> Bumpass, Va
>
> Visit my web sites at:
>
> AeroFoil, a 2-D Airfoil Design And Analysis Computer Program:
> http://aerofoilengineering.com
>
> KR2XL construction: http://aerofoilengineering.com/KR/KR2XL.htm
> Aviation Surplus: http://aerofoilengineering.com/PartsListing/Airparts.htm
> EAA Chapter 231: http://eaa231.org
> Ultralights: http://usua250.org
> VA EAA State Fly-in: http://vaeaa.org
>
>
>
> _______________________________________
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