[PSUBS-MAILIST] Fluidic instruments and controls?

[Marc de Piolenc <piolenc@archivale.com>]

Just a quick impulse question.

I'm currently spending a pleasant few hours downloading from Jens's 
fileserver - what a treasure horde that is!

While thus blissfully occupied, it occurred to me to wonder whether 
anybody has investigated fluidics for submarines. I'm not talking about 
pneumatics and hydraulics, but rather instruments and controls that use 
fluid-dynamic phenomena. For an introduction, see:

http://en.wikipedia.org/wiki/Fluidics

Obviously the aim here is to keep electronics, with their 
water-sensitive components, to a minimum. Fluidics is roughly analogous 
to electronics in that there are both analog and digital 
implementations. Interest in this field recurs from time to time in 
connection with operation of devices that have to be stored over long 
periods before use, and in connection with high-radiation environments 
that can damage solid state electronic devices. NASA even devised an 
all-fluidic guidance system for a projected "lifeboat" for the space 
station, with a stored program that could control the entire re-entry 
process! The control system used oxygen flow from the life support 
reservoir.

Best,
Marc



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