In order to defend against the maritime threat from Germany, the Swedish government asked the Dragon Soul Ordnance Complex to build naval equipment for the Swedish Navy, and the first thing to design and build was a gunboat. After all, between Germany and Sweden, there is an inland sea, so the tonnage is small, but the fast gunboat is a good choice, because the gunboat is low cost, easy to manufacture, and easy to equip in large quantities, and may even be exported to other countries in large quantities.

Xiao Weiguo plans to build the world's most advanced gunboat for Sweden, which will not only be equipped with two Vulcan guns, but also two rocket launchers, four 533-mm torpedo tubes, and a 75-mm main gun. This makes this gunboat a warship with great firepower. The most important thing is that this kind of speedboat will use the advanced power plant developed by the Dragon Soul Ordnance Complex, QD5000 marine gas turbine, and the output power of the two parallel ships will reach 10,000 horsepower, which can be said to be powerful.

The QD5000 marine gas turbine is designed with the Wind Thunder jet engine as the core engine, and its maximum output is 5000 horsepower. This is the world's first warship with a gas turbine. The advantage of using a gas turbine is that it allows the gunboat to go faster. Because of the small size, high power and fast start-up of gas turbines, it is very suitable for Sweden.

This is the first time that the Dragon Soul Ordnance Complex has built a ship, so it is also a process of exploration, with the experience of building gunboats, it can also build destroyers, cruisers, and even sea giants battleships and aircraft carriers in the future.

Of course, now the Dragon Soul Ordnance Complex is full of talents, and many German ordnance experts have come to the Dragon Soul Ordnance Complex in Sweden.

This time, the Swedish military put forward a very high target, the standard displacement of the gunboat is 150 tons, the full load displacement is 200 tons, the length of the boat does not exceed 45 meters, and the width is 5.5 meters. The depth of the mold is less than 3 meters, and the draft is less than 2 meters; Twin axle and double propellers, with a speed of more than 34 knots; Endurance 600 nautical miles / 18 knots, combat radius 200 nautical miles; Wind resistance level 8, able to navigate safely in level 6 sea conditions, and can still effectively use weapons in high sea conditions; Self-sustaining power 7 days and nights; The crew is less than 35 people.

The armament was a 75-mm Bofors gun in the bow of the ship. With a firing range of 15 km, one 30-mm Vulcan gun at the bow and one at the end, two 19-barreled 130-mm rocket launchers in the middle of the hull, which can be used for both fire support and anti-submarine use, and four 533-mm torpedo tubes. Such a firepower configuration can be said to be super strong, comparable to a destroyer. At present, there is no other type of artillery ship of the same type and tonnage in the world that has such a strong firepower.

Soon the design was finalized, and the gunboat was named the L150A gunboat. It has an all-metal hull, a single-deck wooden deck, and is powered by two small, high-power Thunder QD5000 gas turbines. Its mechanical system is very reliable. In addition to built-in redundancy, all mechanical systems have a manual override control. This gunboat has good maneuverability, high buoyancy in reserve, it can operate in very bad weather, and there are no problems at all with navigation and combat in the Baltic Sea.

The use of gas turbines as the power of ships is the first of its kind in the world. Long. Both surface ships and submarines use steam engines, internal combustion engines and electric motors as power plants, and large surface ships use steam turbines as the main power plants. Because steam turbine technology is relatively simple. It is also relatively easy to manufacture, but this power unit is very large, takes up a lot of space, has poor acceleration and deceleration performance, and is also very noisy. Diesel engines are limited by the power of a single engine, and are generally propelled by multiple engines in parallel.

Gas turbines have clear advantages. The power-to-volume ratio is high, the structure is compact, the system is simple, and the thermal efficiency is also very high, from cold start to full speed in only two or three minutes. The fuel consumption rate is only half of that of a steam turbine, and it does not require a boiler or a large amount of fresh water, so it is also very easy to maintain. It is also very simple to change the wind and thunder turbojet engine to a gas turbine, just add a power take-off turbine behind the gas generator, which is somewhat similar to the wind and thunder turboprop engine, but not exactly the same, and its initial turnover life has also reached 3000 hours.

The main gun adopts a 75 mm single-barreled gun specially developed by Bofors Defense, with a maximum range of 15 kilometers, a shell weight of 6 kilograms, and a capacity of 50 rounds, which has a greater destructive power against small and medium-sized warships such as gunboats and destroyers. The 130mm rocket artillery is powerful, it can launch all the rockets in a few seconds, forming a dense fire strike effect, so that it is still effective in attacking large and medium-sized warships, although its accuracy is not high enough, but the advantage is that the firepower is intensive, and it is easy to hit the target, and it is better to use it to support landing operations, and it only needs to bomb enemy targets on the beachhead to pave the way for their own landing forces.

As for the two Vulcan cannons, they are even more powerful, they are mainly used against air targets, and they can also be used against small sea targets such as gunboats. The rate of fire of the Vulcan cannon is up to 4,000 rounds, and the amount of ammunition carried has also increased a lot, each Vulcan cannon carries 1,000 rounds, which is not available in fighter jets and land-based versions of the Vulcan cannon.

Xiao Weiguo learned some of the main shortcomings of the early gunboats, such as the crew space, the early gunboats were very bad, each crew generally only had two square meters of bunk beds, the fresh water carried was also very limited, and the engine noise was also very high. Now that gas turbines are used, the space on the ship has been greatly improved, and coupled with the reasonable design, the comfort inside the ship is not bad, not worse than that of a destroyer.

The shipyard of the Dragon Soul Ordnance Complex was able to complete the construction of an L150 gunboat in a month from beginning to end. And it took only three months from design to construction, so this kind of gunboat came out, it was favored by many countries, and then some countries came to negotiate the purchase, of course, the Swedish government also approved the export of the L150 gunboat, but the performance of the export version was about to shrink, and the power plant replaced a gas turbine with a diesel engine, and the speed dropped from the original version of 36 knots to 33 knots. The rocket launcher was also canceled, but such an export version was still the most advanced in the world, and the Dragon Soul Ordnance Complex was only the first attempt to build a warship, and it was a great success, with orders for more than 100 L150 gunboats filling the shipyard's three-year mission, and the price of each gunboat reached $500,000, which was a staggering profit. (To be continued.) )