Re: TAIL ROTORS

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Article #620

#620

From: Teresa Kline
Date: Tue, 15 Dec 1992 18:09

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In article <10299@ncrwat.Waterloo.NCR.COM>, tjgerman@53iss6.Waterloo.NCR.COM (Trevor German) writes...
> 
>       Why not have a higher RPM 
>	ducted vertical fan driven through a gearbox on the main shaft 
>	pumping air down under the craft. The design of the fan should be
>	done in a way that makes it very viscous, that is, a lot of torque
>	required to move air.  The speed of the fan would 
>	obviosly be greater than that of the main rotor. The pitch of the 
>	fan would again be adjustable, or maybe just a damper in the airflow
>	could suffice.
> 
>	This may have already been tried, or maybe I am missing something
>	fundemental, but I am intrested in any comments or knowledge of
>	similar schemes that have been tried.
> 

It has been tried.  See any AvWeek or similar journal and look for the 
NOTAR (no tail rotor).
-- Teresa

		Life -- just for the FUN of it!!!!

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References: <10299@ncrwat.Waterloo.NCR.COM>

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From: aatresa@lims02.lerc.nasa.gov (Teresa Kline)
Subject: Re: TAIL ROTORS
Message-ID: <15DEC199213092358@lims02.lerc.nasa.gov>
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Date: 15 Dec 1992 13:09 EST  
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