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Posted: 8/28/2005 7:26:53 PM EDT
US Navy unveils Advanced Electric Stealth Ship Demonstrator


August 27, 2005 The US Navy christened its Advanced Electric Ship Demonstrator (AESD) this week, naming the futuristic ship SEA JET and showing it to the media for the first time. The 133-foot vessel will serve as a model representing a destroyer-size surface ship and will be launched on Lake Pend Oreille, Idaho, where it will be used for test and demonstration of various technologies. An underwater discharge waterjet from Rolls-Royce Naval Marine called AWJ-21, will be among the first technologies tested. It allows vessels to operate in shallow water with increased maneuverability and stealth.

The AWJ-21 is designed to increase ship speed, making hulls sleeker by working without rudders, shafts and propeller struts. Unlike conventional waterjets, the system works completely underwater, reducing noise and surface wake and improving stealth.

The lightweight and compact AWJ-21 allows ships to operate in shallow waters. Its integrated steering and reversing system improves manoeuvrability at low speeds.

Pat Marolda, Rolls-Royce President – Naval, said: "This is a significant milestone in our development of an advanced waterjet technology which offers new parameters in performance, bringing real benefits to the US Navy."

Following demonstration of the AWJ-21, the RIMJET propulsor from General Dynamics Electric Boat will be installed in Sea Jet for evaluation. The RIMJET is a novel type of podded propulsion system that relies on a permanent magnet motor to drive the propellor.

The Chief of Naval Research Rear Admiral Jay M. Cohen delivered the principle address at the christening. The ship’s sponsor is Kathleen Harper, wife of Thurman Harper, vice president of engineering for Rolls-Royce Naval Marine, Inc. In the time-honored Navy tradition, she broke a bottle of champagne across the bow to formally christen the ship "Sea Jet."
(gizmag.com)






Link Posted: 8/28/2005 7:28:15 PM EDT
Kickass.
Link Posted: 8/28/2005 7:28:21 PM EDT
... uber kewl
Link Posted: 8/28/2005 7:32:50 PM EDT
LOL...

It's the Merrimac.

BTW: What can that thing do that a mini-sub can't?
Link Posted: 8/28/2005 7:39:24 PM EDT
I want one.
Link Posted: 8/28/2005 7:42:00 PM EDT
I have serious reservations about the seakeeping ability of that hull form, particularly the bows.

It may as well be a submarine, for all the time it's going to spend under water.
Link Posted: 8/28/2005 7:43:14 PM EDT

Originally Posted By Sub-MOA:
LOL...

It's the Merrimac.

BTW: What can that thing do that a mini-sub can't?



Umm... Test propulsion systems and hull desgins for DESTROYERS...

And yes, it does look like the Virginia
Link Posted: 8/28/2005 7:43:57 PM EDT
how long until group buy in the EE?
Link Posted: 8/28/2005 7:49:10 PM EDT
Since when are waterjet propulsors new technology?

When I was a Midshipman at the Naval Academy, I rode on the waterjet propelled hydrofoil patrol boat USS Pegasus. That was in 1987 and the ship had been commisioned for a few years already.

That was a kick ass ride around Chesapeake Bay, I have to tell you.
Link Posted: 8/28/2005 7:55:59 PM EDT

Originally Posted By ArmdLbrl:

And yes, it does look like the Virginia



Yep, very first generation USS/CSS "iron clad"ish.

Link Posted: 8/28/2005 7:58:12 PM EDT
kinda fugly! but still cool
Link Posted: 8/28/2005 8:12:17 PM EDT
How does the Navy apply the technology? Looks cool, but is it a missile,or tactical platform?
Link Posted: 8/28/2005 8:12:30 PM EDT
OK, I'll bite - What's with the snout? Hydrofoil? Sonar?
Link Posted: 8/28/2005 8:13:47 PM EDT

Originally Posted By Skibane:
OK, I'll bite - What's with the snout? Hydrofoil? Sonar?



Active/passive sonar transducer.
Link Posted: 8/28/2005 8:15:06 PM EDT
[Last Edit: 8/28/2005 8:16:05 PM EDT by ArmdLbrl]

Originally Posted By Rick-James:
How does the Navy apply the technology? Looks cool, but is it a missile,or tactical platform?



Uh, its a 1/3rd scale powered model of a destroyer... for research
Link Posted: 8/28/2005 8:25:15 PM EDT
Link Posted: 8/28/2005 8:28:06 PM EDT
Capsize risk?

Link Posted: 8/28/2005 8:30:34 PM EDT
Where are the weapons?
Link Posted: 8/28/2005 8:33:30 PM EDT
Too bad their all gone and being sold for scrap....


Originally Posted By SWO_daddy:
Since when are waterjet propulsors new technology?

When I was a Midshipman at the Naval Academy, I rode on the waterjet propelled hydrofoil patrol boat USS Pegasus. That was in 1987 and the ship had been commisioned for a few years already.

That was a kick ass ride around Chesapeake Bay, I have to tell you.

Link Posted: 8/28/2005 8:35:09 PM EDT
I like it......Where is the flight deck?
Link Posted: 8/28/2005 8:42:19 PM EDT

Originally Posted By ArmdLbrl:

Originally Posted By Rick-James:
How does the Navy apply the technology? Looks cool, but is it a missile,or tactical platform?



Uh, its a 1/3rd scale powered model of a destroyer... for research



So how do they control it?
with a multi channel surface raido?

by what you said I got that impression.

Would be fun to take that duck for a spin.
Link Posted: 8/28/2005 8:49:44 PM EDT

Originally Posted By bulldog1967:
Where are the weapons?



+1

does it fire torpedoes or something?
Link Posted: 8/28/2005 8:52:05 PM EDT
tag
Link Posted: 8/28/2005 8:55:33 PM EDT

Originally Posted By madmann135:

Originally Posted By ArmdLbrl:

Originally Posted By Rick-James:
How does the Navy apply the technology? Looks cool, but is it a missile,or tactical platform?



Uh, its a 1/3rd scale powered model of a destroyer... for research



So how do they control it?
with a multi channel surface raido?

by what you said I got that impression.

Would be fun to take that duck for a spin.



No its manned. Its a scale model but its a 1/3 scale model, so its 133 feet long.
Link Posted: 8/28/2005 9:08:24 PM EDT
the lake in sand point ID, many good times at that lake. plus the brotherhood is stong in northern ID

Also, there must be something in the water, the last several years I have visted, most of young women consistantly have big boobs
Link Posted: 8/31/2005 12:54:07 PM EDT
Some better pictures.





Link Posted: 8/31/2005 1:03:38 PM EDT
It needs some rod holders and a downrigger.
Link Posted: 8/31/2005 2:56:54 PM EDT

Originally Posted By SWO_daddy:
Since when are waterjet propulsors new technology?

When I was a Midshipman at the Naval Academy, I rode on the waterjet propelled hydrofoil patrol boat USS Pegasus. That was in 1987 and the ship had been commisioned for a few years already.

That was a kick ass ride around Chesapeake Bay, I have to tell you.



What class? '89er here.
Link Posted: 8/31/2005 2:58:41 PM EDT
Two words...

Philadelphia Experiment!

Link Posted: 8/31/2005 2:59:57 PM EDT

Originally Posted By H46Driver:

Originally Posted By SWO_daddy:
Since when are waterjet propulsors new technology?

When I was a Midshipman at the Naval Academy, I rode on the waterjet propelled hydrofoil patrol boat USS Pegasus. That was in 1987 and the ship had been commisioned for a few years already.

That was a kick ass ride around Chesapeake Bay, I have to tell you.



What class? '89er here.



88

While everyone else is basking on the "gee whiz" of this reaserch ship, I still have some questions about the seakeeping ability of such a hull form, particularly the bows.

Just in case you are wondering, my major was Naval Architecture.
Link Posted: 8/31/2005 7:08:53 PM EDT
One of the primary purposes of this boat will be to validate the models of the hull design for the DD(X). The seakeeping abilities of the tumblehome hull of the DD(X) are still not resolved.
Link Posted: 8/31/2005 7:45:47 PM EDT
sexy
Link Posted: 8/31/2005 7:48:22 PM EDT
They always forget the weapons and the swimming pool!
Link Posted: 8/31/2005 7:57:25 PM EDT
[Last Edit: 8/31/2005 7:58:05 PM EDT by jkstexas2001]
No pictures of it from the back end showing the propulsion system ... interesting.
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