Assessing the life support systems of the Ben Franklin submarine. In: Proceedings of the design engineering conference and show of the American Society of Mechanical Engineers, Chicago, May 1970, Paper 70-DE-60, 8p.With a successful completion of the Gulf Stream Dnft Mission, the Ben Franklin has more than proven itself. During this miSSion, a six-man crew was sustained for a little more than 30 days by a system that was quite umque In many respects. The system: (1) relied on natural convection for mmosphere control; (2) consumed essentially no electrical energy; (3) cost under $45,000 including expendables; (4) could have performed for 60 days with minor modificatIOns. (Author's abstract) (Aerosp. Med. BIOI.