船模经验(国外英文资料).docVIP

船模经验(国外英文资料) Ship model experience A: noun explanation: Cavitation effect: cavitation effects are often observed in single hull boats with semi dipping oars and catamaran with double drive. The propeller is sucked in front of the water and high discharge, and due to the structural relationship, right behind the propeller is installed on the ship hull, blocking the flow by propeller inhalation, creating a vacuum state reduces the work efficiency of the propeller at high speed. As a result, many single hull ships using semi dipping paddles have increased the propeller shaft, leaving the propeller away from the hull and ensuring the normal use of the propeller. Theoretically, the farther away the propeller is from the hull, the smaller the cavitation effect. It is important to note that, despite the increase of the propeller shaft, the distance between the propeller and the hull is guaranteed, but the force of the ships arm is also increased, and the center of gravity of the ship is changed. For ships that use a straight axle, the straight shaft is forced into the water at a certain downward angle, so if the shaft is longer, the propeller is drawn deeper. In this way, either the efficiency is reduced or the hull is pushed too high to cause instability. Is the so-called: things. Single drive double drive mainly refers to the dynamic configuration of real CAT catamaran, as is the use of dual drive, while in the past because of the impact of the structure, size, speed, weight, internal layout and other factors rarely used dual drive. But in recent years, many manufacturers have introduced a relatively large hull shape, with a lot of game player in order to pursue the fidelity and performance. As a result, more and more players are starting to make and rebuild their dual drive boats. The simulation is not just power and appearance. More is double boat, that run up posture and sound is single boat can not match. (we often say: run at a single pace, double runs. Semi - dippe