Mathematically find forward CG limit on the sloping envelope?
I need to be able to find the forward CG limit at a known weight where the weight lies on the sloping forward limit. I used to know how to do this but have forgotten after years of no use.
I remember the formula was *something* like:
X = CG position
Y = weight for the X CG position
X1 = arm for the least weight point on the slope
X2 = arm for the max weight point on the slope
Y1 = lowest weight for the slope, corresponds to X1
Y2 = higher weight for the slope, corresponds to X2
X = Y x (Y2-Y1 / X2-X1) + X1
It annoys me that I can't remember it. Even more so that I need to use the formula. Can anyone help?
regards
T.