- Jan 4, 2004Jet drives are not very efficient in terms of power conversion but
they are quite common in whitewater boats. The folks down in NZ have
them figured out. I think the Kiwi brand is Shotover. Jet boats were
also popular in Idaho for awhile. I do not recall whether they were
sterndrive or full inboard though. My guess is full inboard because
they routinely jump sandbars, rocks and logs with them.
This type of propulsion is even less efficient in displacement hulls.
If shallow water is your main concern you might consider a Thai
longshaft. Go-Devil is a popular American rendition of this idea. They
are incredibly easy to build.
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