As gassed budgie mentioned when converting a piston arframe to a turboprop the airspeed limit is reduced.
No matter what the aircraft type being converted the Vno becomes the Vmo of the conversion.
Your old Vne no longer exists.
This is a requirement in FAR23 I think. I read an article fully explaining the reasons for this many years ago after seeing many converted aircraft types in the US.
One example was the conversion of the Piper Malibu to a t/prop. It was cheaper than buying a Meridian or TB850.
That difference is usually a large difference, as GB said for eg 166KIAS down from 201.
Being limited to such a low speed especially on descents will be a hassle. Most pressurized t/props will often be descending,in smooth air of course, at a speed up close to Vmo, compliant with airspace/atc speed limits.
Last edited by aussie027; 12th Sep 2011 at 05:58.