A helicopter rotor has four blades, each 3.40m long
from the central shaft to the blade tip. The model is rotated
in a wind tunnel at 550 rev/min.
a) What is the linear speed of the blade tip?, in m/s ?
b) What is the radial acceleration of the blade tip
expressed as a multiple of the acceleration of gravity, g?
a helicopter rotor
2013-05-29 1:20 am
回答 (1)
2013-05-29 2:17 am
✔ 最佳答案
(a) 550 rev/min = 550 x 2.pi/60 rad/s = 57.6 rad/sLinear speed of blade tip = 57.6 x 3.4 m/s = 196 m/s
(b) Radial acceleration
= 3.4 x 57.6^2 m/s^2 = 11280 m/s^2
2013-05-28 18:27:13 補充：
(b) when expressed in terms of g,
11280 m/s^2 = 1128g take g = 10 m/s^2
收錄日期: 2021-04-29 17:48:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130528000051KK00170