Quote Originally Posted by Lionelgee View Post
G'day John & BBD,

One of these ... Accessed February 7, 2016 from,
Piper PA 28R Arrow aircraft history performance and specifications

Kind Regards
Lionel
Yeah that's the one.
A Bell Jetranger heli has a tail rotor vibration danger area to, it occurs at start at idle and you have to accelerate the RPM through that band.

Rod