[Unified-mailman] Important Lab data reduction update

[Carl Dietrich]

Students,

	The raw data (forces and moments in volts) should be modified by subtracting the zero values from the load cell PRIOR to multiplying by the conversion matrices.  For those groups (probably most of you) who do not have zero values (data from when the tunnel velocity = 0 mph) you can download the offsets from the web at

http://web.mit.edu/16.unified/www/SPRING/systems/Spring2004/cal_run.xls

Again, subtraction of the zero value should be done before either of the matrix multiplications.  Please let me know if any of you still have difficulty getting reasonable Lifts & Drags.

-Carl

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Carl Dietrich				
MIT Rocket Team 			
Unified Engineering Graduate TA		
MIT Department of Aeronautics and Astronautics
Office: 33-104				Phone: 617-253-2274
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