Is there a formula for calculating the pivot point of an aircraft while turning on the ground? I'm working on a program that requires a taxiing passenger aircraft (of any model) to perform a semi-accurate turn given a steering angle of the front landing gear. For this I need to calculate the pivot/center point for the aircraft to rotate around. There seem to be a few factors that influence this (including some basic specifications of the aircraft) but I can't seem to find even a general equation that breaks it down.

I'm aware that there are also a number of more complex factors that would influence this, but for my purposes I'm assuming an ideal situation with minimal interference.

Thanks in advance!
The pivot point will be where an imaginary line through the rear wheels and an imaginary line perpendicular to the front wheel intersects.



So if θ is the steering angle and d is the distance between the front wheel and a point halfway between the rear wheels then 

X = d • tan(θ)

will give you the distance from the point between the rear wheels to the pivot point.