semi-submersible fast attack craft..

[DanWard]

http://foxxaero.homestead.com/indrad_064.html

This might stimulate the imagination.

[Brandon]

A quikie here, I came across this neat little toy the other day...it looks fast and fun. no room for torpedoes though.
http://www.innespace.com

[Keith King]

Hey WaWa,

With the engines on the market today, You've got your handsful. I'm working on a new "squid type" engine. It is my hope to be able to use it to power surface craft, for underwater "Flight" and possibily true ground effect flight.
Semi submerged is how I want to build some reef houses. Keep Your eyes on the prize. Best Wishes

Keith

Originally Posted by wawa

hii..i'm doing on the preliminary design of the semi-submersible attack(SSAC) craft...for my degree thesis...the requirement of the SSAC are to operate in to mode that are the surface planning mode at 45knots and semi-submerged mode at 10knots...i'm quite headache on how to start....do somebody thinks it's feasible if the catamaran or swath concept to put into the design...the hull form and the ballast system are what to emphasis...it will be great if somebody would have some reference or links related to this...thanks

[Thunderhead19]

I realize that this is an old thread, but I can't resist replying. Submarines of the WWII era were essentially semi submersible attack craft. Submarines were designed as submersible surface craft until the 1950s when nuclear power became available. Theres probably a lot of wartime and post-war design information and ideas for faster surface operating subs. I used to have an article around here on a H2O2-turbine powered u-boat that could achieve a submerged speed of around 25kts and a SURFACE SPEED OF AROUND 20kts. Weird huh? Makes sense though w/r/t wave generation.

[Keith King]

Hey Thunderhead19,

I spent twenty years scrubbing for surgery. I've held beating human hearts in my hands and then poured on ice water to stop the beating so we could make the repair. I'm disabled now. I slipped on a wet floor and tried to bust the concrete with my face. Not something I'd recommend.

Anyway, in that twenty years I realized that nature had taken millions of years of trial and era to produce the living things in nature. To succede at imitating natures ways is perfection. A heart, a squid, an octipus and who knows what propells themselves around our oceans with jet power. I have yet to see one of these creatures with gears, pistons and that kind of thing. Modern man has yet to capture a giant squid. I still hope to make a buck or two from my Alpha Jet one day. Saying more than I should-- substitute the expanding gases from internal combustion for muscle, tweek it a little and you have an engine with no moving parts. What will I ever do with that gas pressure created by combustion ? Easy, power my subsystems.
The Alpha Jet (A.J.) is much like a "Pulse Jet" except a pulse jet is a weak run away reaction with no control such as throttle. It also sucks gas like there is no tommorrow. The A.J. needs no repetitive cycle to function. put it underwater and instead of moving parts ,move water and/or air. If I can push water though a tradiional jet boat nozzle with 1,000 P.S.I.of air- how much thrust would that produce if 50 percent or more of the thrust stream was water? I wanted to say that to show how much I know about math.
Then I realized squids couldn't do any math at all, but try to catch one with just your hands. Sorry, I have a tendancy to ramble.

Thank for the reponse!!

Keith

Originally Posted by Thunderhead19

I realize that this is an old thread, but I can't resist replying. Submarines of the WWII era were essentially semi submersible attack craft. Submarines were designed as submersible surface craft until the 1950s when nuclear power became available. Theres probably a lot of wartime and post-war design information and ideas for faster surface operating subs. I used to have an article around here on a H2O2-turbine powered u-boat that could achieve a submerged speed of around 25kts and a SURFACE SPEED OF AROUND 20kts. Weird huh? Makes sense though w/r/t wave generation.

[tonydignity]

Originally Posted by wawa

hii..i'm doing on the preliminary design of the semi-submersible attack(SSAC) craft...for my degree thesis...the requirement of the SSAC are to operate in to mode that are the surface planning mode at 45knots and semi-submerged mode at 10knots...i'm quite headache on how to start....do somebody thinks it's feasible if the catamaran or swath concept to put into the design...the hull form and the ballast system are what to emphasis...it will be great if somebody would have some reference or links related to this...thanks

Hi im not sure if you mean planeing and displacement configurations. If so I redesigned a Sea Sled configuration that had a flooding pod that is called Samson sea truck, I had lines drawn for a black ops raider and larger stealth vessel,but all I have left are design photos with dimensions .

[SubCarBuilder]

I think that it might be to much to bite off, then again that's coming from the guy who just installed ballast tanks to a VW Jetta. My project is having some snags, and yours is ten times more complicated. 45 knotts and then a partial dive? That's a pretty wild idea.

Best of Luck
Mike