Re: [PSUBS-MAILIST] compressed air motor

[Juergen Guerrero Kommritz <groplias2@yahoo.com>]

Hello
The idea of compressed air motor is not new and it is
nice. Pneumatic cars are more safe than gasoline cars
for many reasons.  For submarines a compresed air
motor it is not very usefull there were some examples
of this the Plongeur as far as I remember but it was
not controlable and for military use not worthy
because you can detect it anytime from the surface by
only loking were the bubbles are, the same way you
check were divers are from the transport boat.
But interesting can be the compressor of the car. 
Most submarines need compressed air to blow their
tanks and an economical strong electric compressor is
very valuable specially for P subbers.  With 300 bar
you can blow almost any diving tank if you are not
using a deep sea submersible.
Do someone have some more details about the compressor
hea are using on their cars?
Best wishes
Jürgen

--- Ian Roxborough <irox@ix.netcom.com> wrote:

> 
> It's neet, but the problem with compressed air
> motors and submarines is
> that the efficency goes down as the sub goes down. 
> I.e. the deeper (the
> higher the external pressure), the less work the
> compressed air able to
> do.
> 
> Also, if I'm remembering correctly.  The key to a
> good compressed air
> motor isn't really the engine, but the fact the
> compressed air is chilled.
> This counters the problem of power loss when part of
> the compressed
> air is used up (e.g. when the flask is at half
> pressue).  A volume of
> chilled compressed air is measured out from the main
> flash by a
> relatively low pressure regulator, then warmed so it
> expands.  Providing
> the cyclinder has more pressure than the low(er)
> pressure expansion
> chamber requires to operate, the motor can run
> without any power loss.
> 
> Ian.
> 
> On Thu, 2 Feb 2006 21:41:35 -0800
> "rick miller" <rickm@pegasuscontrols.com> wrote:
> 
> > guys
> > 
> >     I saw a discovery channel show on compressed
> air motors for cars. the manufacture claims to be
> ready for full scale production. it looks to be
> about the same weight density as battery power.
> might be some thing to think about.
> > 
> > http://www.theaircar.com/howitworks.html
> > 
> > Rick M
> 
> 
> 
>
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