Scott,

Another way to calculate true airspeed is located at:

     http://www.reacomp.com/true_airspeed/index.html

Remember when using the technique described at the above listed sight, that you are to fly headings and not track.
--
Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-478-4301, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, N31161, Y47, SE Michigan