On Fri, Apr 16, 2010 at 5:06 PM, Isaac Marino Bavaresco wrote: > The propulsion is the "buoyancy", The wing is shaped to impel the device > forward when it is floating upwards, at a rate much higher forward than > it is raising. > I think the same can be done when sinking, if the "angle of attack" is > changed. > > So, just flood some chamber to sink some meters, if the wing is angled > correctly it will move forward also, then change the angle of the wing > and pump the water out, it will move forward some more as it raises. But the energy is gotta come from SOMEWHERE right? I mean, it takes energy to flood/pump out the chamber, doesn't it? What is the relative efficiency compared to a jet/propeller motor propulsion system? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist