coalface: The accumulators which I originally referred to, are the ones used to keep the servos/jacks working for a limited period following hydraulic failure ….. But on reflection, do these accumulators have more than one purpose? On the AS350 (single hydraulics) there is one attached to each servo. As you mentioned ...... do they also assist in preventing jack-stall (transparency)? .... or is that not an issue with the AS350
I had presumed that the principal reason for the light French helos to have accumulators, was because of the extra force required to move the
elastomerics in the rotor hub.
CRAN:
Small helicopters such as R44, B206, EC120 have control loads that are light engough that should the hydraulic system failure the pilot is physically stong enough to move the controls manually.
Does that mean the EC-120 does not have elastomerics in its MR head? If so, can the pilot maintain control without hydraulics and accumulators?