A flying Buddy and I in Tactical Training in a UH-1D had a hydraulics failure and flew the thing back to Home Plate.....the Cyclic was a bit stiff but manageable but the Collective was very...very...very easy up.....and a bugger bear to move down even with two of us grunting and straining against the seatbelts.
Single HYD 205's had an adjustment to the inboard strap fitting so you could take the load off at about mid range Q. Not everyone used to be aware of it and some were pretty hard to fly HYD OFF.
Was a little worm drive arrangement from memory. HYD OFF single hydraulics 205's were hardly noticeable in the cyclic above about 30 knots from memory. Also depended if the blades were swept at all.