What are the characteristics of the design of American high-speed test boat "sea fighter"?

The "sea fighter" high-speed boat was originally called the experimental littoral support boat, and later renamed the X boat. The main purpose of the US Navy's construction of "Sea Fighter" high-speed craft is to demonstrate and evaluate the hydrodynamic performance, structural characteristics and propulsion system efficiency of advanced high-speed warship technology as a ship to reduce risks.

X-boat will also be used as a test platform for experimental mission components, which will support the operational concept development of the integrated deep-water system project of the US Navy Littoral Combat Ship and the US Coast Guard.

X-boat "sea fighter" high-speed catamaran has a light-load displacement of 950 tons and a length of 80 meters. It is made of aluminum alloy and can maintain a speed of 40 knots in class 4 sea conditions. Unlike the previous high-speed catamarans, which were mainly designed to transport large-volume and low-weight goods, the design focus of X boat is to improve the ship's payload and oil carrying capacity.

Another design feature of X-boat is the advanced motion damping system. This system includes titanium alloy T-shaped hydrofoil with trailing aileron, full-width interception resistance, high-speed deflector and so on, which are installed under the two foreheads of catamaran.

X-boat uses a combined gas-diesel power plant (two general electric LM 2500 gas turbines and two MTU/KOOC-0/6V diesel engines) to propel four Rolls-Royce Kamawa/KOOC-0/25s/KOOC-0/water jet propellers, so that the maximum speed of X-boat in still water can reach 60 knots.

X-boat "sea fighter" high-speed catamaran can be deployed independently, with a range of up to 4000 nautical miles, without refueling. The upper deck of X boat can accommodate two helicopters. Come on. The gangway at the stern can be launched to recover 1 1 meter-long dinghy under the condition of class 4 sea condition and speed 10 knots.