Burn time calculation across stages.

Why do you specify a certain amount of delta V for a specific maneuver? I tell the rocket what to do and that's what it should do. I know I don't do circularization the classic way (mine is easier but not used by space agencies) . It doesn't give more than couple of kilometers difference between apogee and perigee but it does crazy spin in process that I prefer to do it without first stage weight.

@Kell now I understand what your program does, however this way the rocket ended up in a 120 - 90 km orbit, instead of the target 80 km. It is a simple solution, however its not really accurate.
BTW your program looks cool, and is quite universal.

You should try my program... @mategyerek

@Kell this does not really solve the problem. Imagine you need 1000 DeltaV to circularize, the current stage has 500, and the stage after that has 2500. If I only burn the first stage, as your program would, I will not even get into orbit. If I ditch the first stage, I waste 500 deltaV. If I burn through both stages (as my program currently does), and TWR of the stages differs significantly, the burn will be very inaccurate. I'm looking for a solution, that takes into account the TWR difference of the two stages, as well as the time needed to stage and ignite the second engine.
I believe, KSP did it somehow with its manuever nodes, but it might use more information than you can currently read from Vizzy.

My program calculates the delta-v required to circularize, and if the current stage does not have enough delta-v, it will fire the stage until it burns out