A small little python script for simulation of an ameteur rocket.
It is a one dimensional simulation (acceleration, velocity and altitude), which considers drag changing temperature and density over altitude, changing mass and thrust.
It also simulates the optimum spearation time for two stage rockets. This is kind of arbitrary cause it is alway (except the drag difference is really huge) always best to use the inertia of the accelerated mass as long as possible in an unpropelled state to work against the drag.
One additional gimnick is the necessary angle of an autotracking device separated from the launchpad.