[Gasification] Underwater gasification?

[Daniel Chisholm]

A Humphrey-inspired water jet is an interesting idea.

FWIW I don't think it would be an efficient means of low speed marine
propulsion though; it would suffer from low propulsive efficiency because
the jet velocity would be too high.  The efficiency of a reaction engine
(which is something that generates thrust by accelerating and expelling mass
- a very broad category that includes not just jet and rocket engines but
also propellers on aircraft and ships) depends on the speed at which the
mass is expelled.  Accelerating a small mass to a large speed, is not as
efficient as accelerating a larger mass to a lesser speed.  If you look at
aircraft jet engines today (high bypass ratio turbofans) you will notice
that they are much larger in diameter than the jet engines of the 1950s
(turbojets) - this is why.


-- 
- Daniel
Fredericton, NB  Canada
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