Hi all,
I'm doing some R&D regarding an external mounted pod for some common helicopters. It would be installed on various ships like the B206/L, B407, AS350/5.
The question is, how do I obtain values for the frequency and amplitude each ship vibrates at? (eg, at the pilots seat)
I know you can deduce the basic frequency by inverting the main and tail rotor RPM quantity but I still need amplitudes and confirmation that the machine keeps the basic vibration frequency intact throughout the airframe (ie. same Hz a the front seats as it is at the mast).
Just need some basic numbers to work with.
These numbers would help in the design of an effective damping system for our sensors mounted internally to the external pod (land survey equipment).