Hi Guys,
Eurocopter have a very contrived way of getting their numbers. Im not quite sure how it works but the three figures represent the weight class, no of engines and civil / military spec. There is also something about if it runs to four numbers the excess is added to the first number to again create 3. Thats is why you have civil aircraft starting in 1, 3 and 2 (135,365,225) yet their military counterparts are 6,5 and 7 (635,565 and 725). If somebody can find out how it works completely it is quite interesting.
As for the 145 it is not a new generation aircraft. It is an ancient, but reasonable, BK117 drive train with new body shell and cockpit. Lots of vibs, tiring to fly and very, very easy to exceed the rotor mast moment on landing. Not for me thanks.
ST