RE: [PSUBS-MAILIST] CNG power for subs

[irox <irox@ix.netcom.com>]

Propane (and I think butane) are heavier than air, so will not be
suitable for submarines.

Cheers,
 Ian.

-----Original Message-----
>From: Hugh Fulton <hc.fulton@gmail.com>
>Sent: Jul 27, 2010 6:05 PM
>To: personal_submersibles@psubs.org
>Subject: RE: [PSUBS-MAILIST] CNG power for subs
>
>Hi Brian,
>I would go for LPG rather than CNG and the kits are similar.  You could get
>it tuned for Propane or butane mix which ever you have and it is easily
>filled anywhere. Range is much better and those light cylinders that Frank
>was looking for using as VBT's are LPG cylinders you can see through. I
>would think that they would be good for around 1000 ft but definitely 500 ft
>as long as they had some LPG still in them. Gasoline engines are lighter
>than diesel engines.  I would love to find a really small high horsepower
>(150 ) high speed, Diesel engine.  Chs,  Hugh  
>
>
>
>-----Original Message-----
>From: owner-personal_submersibles@psubs.org
>[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian Cox
>Sent: Wednesday, 28 July 2010 3:58 a.m.
>To: Personal_Submersibles@Psubs. Org
>Subject: [PSUBS-MAILIST] CNG power for subs
>
>Hi All,   Hope everybody had a good time at the convention !   Congrats
>Vance on your new aquisition !
>
>CNG for subs:
>
>The main objection to having a gasoline engine on a sub is the volatle gas
>fumes.  I was thinking that it might be advantages to use Compressed Natural
>Gas in a regular automotive engine (like a Chevy 350) or whatever would work
>size wise in a psub.  There is a slight power reduction with CNG but not
>much. Also the pressurized tank required would take up a bit more room than
>diesel, but since it is pressurized it would function well at depth as far
>as keeping seawater out.  Another added benifit would be the elimination of
>any possible spills into the ocean environment.  If one went with a CNG
>power it would give you a lot more options with types of engines,
>compression ratios would have to be altered however.  You can find engines
>from the factory designed for CNG otherwise you would need to retro-fit.
>
>Brian
>
>
>
>
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