RNHF_PILOT,
So in your experience, is the Gypsy Major the ice generator it is reputed to be?
My military Chipmunk experience was all in the "carb air wired hot" variety and the two civil Chipmunks I flew for spinning, was so early in my flying career that I cannot remember the carb air procedures.
India Four Two, in my limited Chipmunk experience it is not the ice generator it's made out to be, I've not experienced any carb icing issues so far.
I think it might be a case of somebody somewhere in the past having a crash that was put down to carb icing and then the usual military knee jerk reaction of wirelocking the fleet, rather than properly understanding the issue and training people correctly.