Will Main Rotor Actuators be Stucked?
I'm a student studing helicopter dynamics and I read it in "UH-60 Flight Control and Hydraulic Systems" that there are mainly two failure types of main rotor actuator types:
The first one is that a breach of the hydraulic chamber would cause pressure loss, which is can be seen in many accident reports.
The second failure type is jamming of the piston within the cylinder such that the servo actuation displacement is fixed. But this is confusing for me because there's very few documented accidents that are caused by such failure.
Have you seen any documented accidents casued by the stuck/jam/locked-in-place of the main rotor servos? Or does it just more oftenly happen for RC helicopters (with electric servos) ?