PPRuNe Forums - View Single Post - Turbo Prop operation: Fixed shaft and FPT Alpha and Beta modes
Old 11th Aug 2017, 21:07
  #7 (permalink)  
rigpiggy
 
Join Date: Apr 2005
Location: yyz
Posts: 105
Received 6 Likes on 5 Posts
As far as the tpe 331, i always explained it that in alpha mode you had the underspeed governor" min selected speed add fuel", overspeed governor" adjust prop to keep speed under" manual fuel valve "select ff and the overspeed adjusts prop" and fuel bypass"srl tq/temp control". In reverse the beta cam sets prop angle and the underspeed governor ramps up fuel to stay onspeed.

And there is a 104% governor too

Probably oversimplified, but if you cant explain simply......

Last edited by rigpiggy; 11th Aug 2017 at 21:09. Reason: Addition
rigpiggy is offline