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Old 17 November 2006, 21:50   #11
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I've thought of CO2, but with travel, compressed air will be easier to replenish on-site. CO2 would require finding a commercial gas supplier. Anywhere the RIB is, we're likely to be able to find a dive shop to refill air tanks. We'll see what the engineers think

Oh, the machinery won't be aboard the rib, which will function as a support vessel... Small tanks for weight savings aboard the other boat.

I'm surprised no one's making any guesses!
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Old 17 November 2006, 22:50   #12
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They use compressed air to power torpedos!!!
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Old 18 November 2006, 15:36   #13
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Quote:
Originally Posted by dctucker View Post
I'm surprised no one's making any guesses!
Nautical Paint-ball?
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Old 18 November 2006, 18:46   #14
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They use compressed air to power torpedos!!!

Uhh, no they don't. They expel the fish from the tube with compressed air, but the prop is driven from a small turbine engine (I think.)

jky

Later research on my part shows that there are a number of propulsion systems in use now; ranging from piston engines (US Mk48) to chemical engines (US Mk50 - uses sulphur sprayed onto lithium to generate heat for a steam turbine), to an Ottofuel powered gas turbine (US Mk46, UK Spearfish.) Probably a bunch of battery powered fish, as well.

jky
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Old 18 November 2006, 18:59   #15
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Ok maybe I shoud have said "used" - not just to push it out of the tube but to power it's piston motor. Most WWII types used this system.
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Old 18 November 2006, 19:04   #16
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Uhh, no they don't. They expel the fish from the tube with compressed air, but the prop is driven from a small turbine engine (I think.)

jky

Later research on my part shows that there are a number of propulsion systems in use now; ranging from piston engines (US Mk48) to chemical engines (US Mk50 - uses sulphur sprayed onto lithium to generate heat for a steam turbine), to an Ottofuel powered gas turbine (US Mk46, UK Spearfish.) Probably a bunch of battery powered fish, as well.

jky
I think maybe you are getting a little confused - some of the piston engines are NOT operating in the conventional sense like a car engine. It is operating in the same way as the earlier compressed air torpedo engines - instead of using compressed air though it uses a rapidly expanding gas.
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Old 19 November 2006, 12:51   #17
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I'm surprised no one's making any guesses!
Some sort of high powered air lift?
No, no I know, I know, you are trying to automate expired air resuscitation, but have you thought about all those divers doing balloon impressions, might not look good on the accident forms
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