Equipment would surely include a parachute, so I would increase that by about 10lb.

Now, we cannot determine the terminal velocity without knowing such things as drag coefficient and such. Could we suspend your subject in a wind tunnel before coming up with an answer?

Terminal velocity? i think that involves differential equations

This is from a physics forum:

One common model is that the resistance force is proportional to the speed.
Under that model, an object falling, under gravity has acceleration -g+ kv (k is the proportionality constant, v the speed. Since that is a function of v, it give the linear differential equation mdv/dt= -mg+ kv. The general solution to that is v(t)= Ce-kt/m-mg/k. For very large t, that exponential (with negative exponent) goes to 0 and the "terminal velocity" is -mg/k.

Another common model is to set the resistance force proportional to the square of the speed. That means the net force is -g+ kv2 and v satisfies the differential equation mdv/dt= -g+ kv2. That's a non-linear differential equation but is separable and first order. We can integrate it by writing
dv/(kv2-g)/m= (-1/2√(g))(1/(√(k)v+√(g))dv/m+(1/2√(g))(√(k)v-√(g))dv/m= dt.
Integrating both sides, we get (1/2√(kg))ln((√(k)v-√(g))/(√(k)v+√(g))= mt+ C. For large t, the denominator on the left must go to 0: the terminal velocity is -√(g/k) which, you will notice, is independent of m. This model is typically used for very light objects falling through air or objects falling through water.

Hm... as much as I know about math I know nothing about what kylekatarn just pointed out.
However I can tell you what a halfling is, think of a human being only 1/4th the size roughly... like a child that grows to be an adult in every way exept shorter life span and lacks the vertical height a human has.  They are tricky little things.  Read some TSR(Wizards books now) there are plenty of Halflings in those fantasy novels.  Good books too.....

So what you are saying is that there is no amount of math on paper that can calculate the TV of an outstreached halfing?  Cause I am just looking for MPH.... I figured it would not be too bad to figure out but I guess it is way more to figure than I had imagined.