I was toying with my ballistics spreadsheet, one I share a common interest in with Peter Cronhelm, and can across a dilema.

I can get a 'corrected' range figure easily enough by using the LOS distance and angle cosine but I can't quite figure out how to get one using the LOS elevation data. The problem resides, for me, in using a 'zero' range setting.

Here's how I am trying to solve the problem.

I elect to use the 100 yard 'zero' as the start point for the angle corrected elevation adjustment, I determine the amount of correction required to adjust for the LOS distance and then apply the angle cosine to this value. But, I have a glitch in that my 100 yard 'zero' value is NOT the correct 'zero' for the shot on the current angle problem, in other words, I have no 'zero' reference point for angular trajectories.

I'm seeking alternative methods to apply the angle cosine to the required elevation correction values. (This is just for my personal enjoyment and not a life-or-death situation.)

Any clues are appreciated.

[ 06-22-2001: Message edited by: Dave King ]