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RE: Ballast

To: "'Dave Dahlgren'" <ddahlgren@snet.net>, Joe Amo <jkamo@rapidnet.com>
Subject: RE: Ballast
From: "Clay, Dale" <Dale.Clay@mdhelicopters.com>
Date: Thu, 5 Jul 2001 07:28:57 -0700
The exhaust plume IS included in the frontal area number and contributes to
the drag number.  I doubt any increase in traction would overcome the
additional drag.

Dale C.

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Subject: Re: Ballast


Thinking logically it would seem the down force to be canceled by the
increase
in aero drag. It has to make a lot bigger hole in the air if it comes out 90
degrees to the direction of travel. If you aim it out the back it will do no
harm and might fill in the hole to a certain degree that you are making in
the
air. 'Base drag' and all that stuff.


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