Bell 412 s/n 33001 - 33108 Vertical TO
I've been flying a first series Bell 412 with increased gross weight and TO horsepower kit installed (19.1 FMS) and PT6T-3B engines for a while.
The RFM only allow a CAT A take off from a runway, but there is a Bell 412 SP FMS (22.2) that describe a vertical take off procedure in CAT A with the same engines (PT6T-3B).
So, my question is, is there a reason why a Bell 412 cant perform the same CAT A vertical take off of the Bell 412 SP?