To add to FED`s description,the powered controls were all in the front lower compartment ,and fed the rotors by a suitable system of pulleys and cables..this did lead to a fatal crash when the rear rotor cables jumped a pulley leading to loss of control. The aircraft had the fuel fillers up near the exhausts,so it could not do a hot refuel ,which made it difficult during a big troop-lift to start by carrying only about 6-7 troops,increasing the number as the fuel went down.,so it was usually employed lifting guns and ammo as u/slung loads.
I think the guys got around the cartridge problem by carrrying spares,and only one in the breech for start...