Comments by "Dave Sisson" (@Dave_Sisson) on "Paddles and Propellers - It's all about the rotation" video.

  1. It is claimed that the water jet was refined and made practical in the 1960s by a New Zealand engineer called Bill Hamilton who had previously built lifts for ski resorts in Australia and NZ. Not sure how true that claim is, but Bill got knighted and as Sir William Hamilton he ran a successful company that produced water jet engines and boats powered by them.
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  2. Catamarans and trimarans have very little space inside the hulls. So they are good for modern fast ferries, but not so good for cargo and naval vessels.
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