but not once in my career operating them did they not 'tell' me there was something wrong..... It sounds like you have listened to yours as well MO... good one.
Well rotorque I've heard of horse whisperers, but this one takes a bit of beating. Your comments do reflect some KH4 and Bell 47 experience.
Perhaps in the text below which refers to an incident at xmas time you'd like to relay what the, ah, whisperin' was all about. Or, was the operators in need of a set of hearing aids?
4 recently a head and mast assembly fell off a KH4 causing it to descend quickly (surprise) from its luckily very low altitude.
5 no one but no one has talked about what must have been chronic filter contamination that time for at least the last two oil changes. in that case the tip is that the mast bearing let go after what must have been large amounts of evidence in the filter
all the best sunshine
tet