Rex cornering addendum correction.

[ngear@gvtc.com]

Damn.  This is like trying to get a phalanx of cockroaches to march in
formation.


Turns out there was a communications snafu between Jim and me, so I ran off
with the wrong formula for air drag.  

The corrected formula is 
Drag force = 0.0023769*0.5*(Coefficient of drag)*(Frontal area in square
feet)*(velocity in feet per second)^2

Plugging in my previous values (0.6 coefficient of drag; 36 square feet; 22
fps) yields a drag of 12.42 pounds.  So basically, I overestimated the
strength of this effect by double what it should have been, so chop all the
air drag results in half.


Sorry about that.
Nicholas