The Bell 47 had clutch shoes, like brake shoes, & needed the throttle to be reduced at a certain forgotten rpm to fully engage. The Hiller bags were a bit different but seemed to work well considering we were students.
The RN replaced the 12C with the 12E in 1963; it was great flying a brand new machine. From that new machine, we went onto Whirlwind Mk 3 & Mk 7 which really sorted out the boys from the men!!
