Page 349 - Thomson, William Tyrrell-Theory of Vibration with Applications-Taylor _ Francis (2010)
P. 349
336 Introduction to the Finite Element Method Chap. 10
Figure 10.8-4. Robinson Helicopter Model R22: Blades 7.2 in. wide and
151 in. long; cantilever period of approximately 1 s; gross weight of 1370
lb loaded; tip speed of blades 599 ft/s.
Figure 10.8-5. Commercial helicopter for oil platform service: Blades 24
in. wide and 24 ft long, 200 lb each; cantilever stiffness is 6 f t / 100 lb load
at the tip; total weight of the helicopter is 7000 lb empty and 13,000 lb
loaded.
