There has been some discussion about thrust/velocity profiles for fuel-efficient ascent, so here\'s a way to test your own strategy. In fact this is known as the 'Goddard problem' in control theory and there are papers on it, but nowhere near so much fun as testing it yourself. This is also a 'fuel efficiency' challenge, but will take you less than 5 minutes\' flight time. We are launching the supplied sounding rocket into the upper atmosphere (.craft file attached). No modifications allowed, no