[Gasification] Underwater gasification?

[David G. LeVine]

On 05/23/2011 11:48 PM, GF wrote:
> Further to marine propulsion using the principles of a water jet. The 
> Humphrey pump I inspected at Chingford ran on coal gas, it did not 
> have the "high speed" suggested by Dan.
> It performed ten power strokes a minute lifting ten tons of water 54 
> feet per stroke.The delivery pipe diameters were large, suggesting  
> high volume low velocity. This same  pendulum action could be achieved 
> with suitable water conduits designed into the construction of the 
> vessels hull, low in the keel. the cross section of which need not 
> necessarily be circular.
>  Designing a propulsion system for a boat would probably require the 
> inclusion of an accumulator to provide a fairly constant pressure to 
> an "out put main" where jets at strategic points could be manipulated 
> for steering and manouverability.One feature of of an engine with a 
> fluid piston is the shape of the combustion chamber can be designed to 
> suit a constant pressure explosion, where as the piston can be cone 
> shaped increasing in surface area on descent.
> I think it would be fairly simple and low cost to build an air 
> compressor to start with by boring a hole in the ground and install a 
> pipe within a pipe.and get a column of water "see sawing' up and down 
> the hole using the water as a ram to compress air, by exploding gas at 
> one end of the column
> .
> GF

Another point, if you look at theLockwood valveless pulse jet engine 
<http://www.zachmiers.com/pulsejetbook/> as described by Bruce Simpson 
(not Bart!), you will see "Thrust Augmentors" 
<http://www.aardvark.co.nz/pjet/valveless.htm>, which allow higher 
thrust by trading velocity for mass flow.  That would help on a boat.

Dave  8{)
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