using this
http://en.wikipedia.org/wiki/Terminal_velocityand yes... i'm bored at work lol
this is what i get ... if i did it right ... seems kinda fast
***************************************************************
Vt = terminal velocity,
m = mass of the falling object,
= 1978kg (TJ with I6 and hardtop)
g = acceleration due to gravity,
= 9.81m/s²
Cd = drag coefficient,
= .55
p = density of the fluid through which the object is falling, and
= 1.2 kg/m³ (at sea level)
A = projected area of the object.
= 2.963m² 1.750m (height) * 1.693m (width) = 2.963m²
Plug all those in and you end up with 141.19m/s
141.19m/s is equal to 508.28 k/h
So 508.28 k/h is the terminal velocity of a TJ falling nose down at sea level