http://blog.modernmechanix.com/2007/10/16/spiral-rollers-drive-odd-speed-boat/ Yesterday's tomorrow, today. Tue, 02 Dec 2008 05:48:18 +0000 http://wordpress.org/?v=2.6.2 http://blog.modernmechanix.com/2007/10/16/spiral-rollers-drive-odd-speed-boat/#comment-609001 Stannous Tue, 16 Oct 2007 22:50:40 +0000 http://blog.modernmechanix.com/2007/10/16/spiral-rollers-drive-odd-speed-boat/#comment-609001 But the more buoyant the pontoons, the less drive from the screws. No surprise that this never made it past the sketch phase. But the more buoyant the pontoons, the less drive from the screws. No surprise that this never made it past the sketch phase.

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