US LHA(R) designs.

archipeppe said:
Interestingly within the design is depicted the F-32B rather than the actual F-35B.
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It's not that big a deal. Mainly, it dates that concept drawing to sometime in 2001, before the JSF downselect. Or possibly somewhat later and the CAD operator didn't have an updated library with the F-35B shape. The two aircraft are quite similar in overall dimensions anyway.
 
A slightly novel take on LHA(R) from three naval officer students at MIT:


Rather than a bigger ship in the vein of the LHA-6 that materialised (and still less so than the huge Dual Tramline concept), they suggested that the most cost-effective approach was pairing a follow-on LHD-8 with a 9,500-tonne trimaran carrying 200 troops, 6 MV-22s, and 15,000 cu. ft. of cargo, at speeds in excess of 36 knots.

It's certainly a novel approach to the problem.
 
RLBH said:
A slightly novel take on LHA(R) from three naval officer students at MIT:


Rather than a bigger ship in the vein of the LHA-6 that materialised (and still less so than the huge Dual Tramline concept), they suggested that the most cost-effective approach was pairing a follow-on LHD-8 with a 9,500-tonne trimaran carrying 200 troops, 6 MV-22s, and 15,000 cu. ft. of cargo, at speeds in excess of 36 knots.

It's certainly a novel approach to the problem.
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Beside needing organic on board ship defense and Fire Support such as VLS VGS etc, IMHO it is great concept. The below deserves a serious look.

5.2 Areas for Future Study This study raised several issues involving trimaran design that were not fully investigated. To date, a considerable amount of work has been done on trimaran designs, but it has not been fully integrated, making the design process very difficult. Additionally, much of the information collected from model tests and other experiments is proprietary and not available for general use. Tools that are flexible enough to handle trimaran designs will simplify the design process tremendously. This will allow future designers to concentrate more on details and resolve many of the issues listed below. There are several issues involving the resistance characteristics of the trimaran that must be resolved. These include the effect of wave interference between the hulls, as well as the effects of the side hull shape and location on the overall ship resistance. Computational models and model tests would both provide useful data on these issues. The seakeeping characteristics of trimarans are only beginning to be understood. The RV Triton is currently undergoing tests that will help to determine how trimarans behave in various sea states. While the testing has not been completed, the results are encouraging [15]. The shape and placement of the side hulls could also have a significant effect on the seakeeping characteristics, so more experimental and computational tests will be required. The design team did not attempt a detailed structural analysis of the cross-deck structure. This is a complex problem due to the joints between the hulls and the cross-deck, as well as the lack of knowledge of the bending moments that will be encountered. The loading conditions for a trimaran must be examined in depth, including the bending moments, flight deck loads, and blast material. Once the loading conditions are defined, the dimensions of the scantlings can be optimized. Finally, a detailed analysis of the cross-deck joints can be conducted. Studies have shown that composite materials may have several advantages in reducing the weight and cost of the ship [16]. There are numerous unanswered questions associated with the use of composite materials in warship design that must be investigated in more detail. Finally, the deckhouse in this study was only designed to meet the area requirements. A great deal of work is required to determine the optimal mast design and integrate the combat systems of the ship.
 
jsport said:
Beside needing organic on board ship defense and Fire Support such as VLS VGS etc, IMHO it is great concept.
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It seems to me rather like a modern incarnation of an APD, which is a very interesting idea.

Of course, the more you add to the ship the more the cost rises. If the concept were to be progressed beyond a student design project (even a well-informed one) the capability trade space would no doubt be extended to include defensive and fire support capability.
jsport said:
The below deserves a serious look.
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To be fair, the study was nearly 20 years ago, and the USN now has an appreciable number of trimaran warships in service, so much of that work has presumably been done.
 
RLBH said:
jsport said:
Beside needing organic on board ship defense and Fire Support such as VLS VGS etc, IMHO it is great concept.
Click to expand...
It seems to me rather like a modern incarnation of an APD, which is a very interesting idea.

Of course, the more you add to the ship the more the cost rises. If the concept were to be progressed beyond a student design project (even a well-informed one) the capability trade space would no doubt be extended to include defensive and fire support capability.
jsport said:
The below deserves a serious look.
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To be fair, the study was nearly 20 years ago, and the USN now has an appreciable number of trimaran warships in service, so much of that work has presumably been done.
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..would still have to argue that large Trimarans dont exist nor do composite carrier decks.
 
jsport said:
..would still have to argue that large Trimarans dont exist nor do composite carrier decks.
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Composite flight decks don't, but the LCS-2 design is large enough to draw meaningful conclusions that can be applied to other large trimarans.
 
RLBH said:
jsport said:
..would still have to argue that large Trimarans dont exist nor do composite carrier decks.
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Composite flight decks don't, but the LCS-2 design is large enough to draw meaningful conclusions that can be applied to other large trimarans.
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Aware of LCS but beg to differ as to whether LCS long enough to draw conclusions on trimarans. Not a fan of LCS. A little sizzle and even less steak in the emerging environement.
 

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