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Date: Tue, 08 Dec 1998 12:51:34 -0500
From: David Kirschbaum <kirschd@NOcarolinaSPAM.net>
Organization: Toad Hall
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Subject: Re: IAS - TAS Algorithm
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Dave Venman wrote:

> David :
>
>   Relatively straightforward.  Assuming ISA ( International Standard Atmosphere
> ) conditions, i.e. 15 degrees Celcius and a sea-level pressure of 1013.2
> millibars, TAS is about 2% per 1,000 feet higher than IAS at light plane speeds.
>
>   So, if you've an indicated airspeed of 120kts at 10,000 feet, then TAS is
> about 140kts.
>
>   Of course, if my memory is wrong the above is as well, but I don't think so.

Thanks much for the info.  Incidentally, I received other pointers to two
interesting sites:

 http://www.mcs.net/~bbeard/wind.html   Aviation Wind Formulas

 http://www.best.com/~williams/avform.htm     Aviation Formulary v1.23

David


