It is an important way for improving the rapidity of a displacement craft to adopt tunnel stern and increase propellerdiameter.
采用隧道尾而增大螺旋桨直径，是提高排水型快艇快速性能的一条重要途径。
2
The value of apparent viscosity is influenced by the diameter of the screw propeller.
用直径较大的转子测得的表观粘度较低。
3
A table containing values of propeller load can be used to compare propellers of varying diameter and pitch, as to the load that they impose on the engine.