How is the construction of the Yukon-class tank landing ship?

In the 1970s, the PLA Navy made active preparations for the liberation of Taiwan Province Province, and formally put forward the task of developing a large landing ship. The navy put forward outstanding performance indicators: the speed should be above 18 knots to ensure fast passage through the Taiwan Province Strait.

Speed is an important index of landing ship performance. Large landing ship belongs to ultra-shallow draft and wide ship type. When the speed exceeds 15 knots, the resistance increases sharply. Therefore, the design speed of 18 section is very high.

The LST large landing ship built in the United States during World War II has a maximum speed of only 1 1 knots; The speed of large landing ships serving in other countries after the war is also around 13- 17 knots; Only the "Newport" class boarding built by the United States in the 1970s used the unconventional design of suspension bridge springboard with a speed of more than 20 knots. The development of landing ships with the speed of 18 knots is to catch up with the advanced level of landing ships in the world.

In order to solve the key contradiction of developing a large landing ship with a speed of 20 knots, Chinese ship researchers have repeatedly studied from many directions and successfully solved this problem.

In design, in order to ensure high speed and excellent beach scouring and retreating performance, a 17m long folding double-section suspension bridge was carefully developed. This suspension bridge device is simpler in structure, easier to operate and lower in cost than the 34m suspension bridge and its transmission device used for American "Newport" class boarding. In addition, a tailgate is added for amphibious tanks to pass through, and the tank cabin is provided with a longitudinal passage, which simplifies the operation procedures of amphibious tanks entering and leaving the ship, improves safety and shortens loading and unloading time.

1March, 978, the test speed of the first ship reached the requirements of the design task book, which not only achieved the goal of developing 20 large-scale landing ships by itself, but also made China the second country in the world with a speed of 20 knots.