One of the problems of using torsionally soft rotor blades occurs at high collective pitch, if the blade is highly twisted. In addition to Propeller moment, there is a tension term acting on the blade which is normally small in comparison to the propeller moment. At low collective and high...
Numerous Empirical values for K exist. The main reason for different values of K is due to the different methods of modelling it. Chen gives an excellent survey of Inflow models used for flight dynamic simulations "A survey of nonuniform inflow models for rotorcraft flight dynamics and control...
Man's attempts at flight have tried to imitate that of birds. As with bird flight, the aim was to have complete freedom in air using direct lift, i.e. to take-off and land vertically, fly up and around, straight and level and hover under powered flight. Initially this proved to be difficult...
To generate a hub moment, each blade needs to be freely hinged. Doesn't the Tie-bar in essence force the blades to respond in unision because they're not actually freely hinged! I read at the bottom of the page (http://www.synchrolite.com/1127.html) that the Tie-bar could be elastic, which might...
