A Bell 47 is a vastly different machine to the R22. It's wonderfully old fashioned and basic which means that you need good coordination on the throttle/ lever / pedals. It is slow to respond to throttle changes but wonderful in autorotation. Take a good book with you when doing engine-offs, plenty of time to pick a landing place and oodles of RRPM at the bottom. Note that it is much longer than the R 22 so keep space underneath when doing any flaring.