Jason,
“14-stage axial-flow compressor with inlet guide vanes (IGVs) and five variable-geometry-stator stages”
https://www.rolls-royce.com/products-and-services/civil-aerospace/business-aviation/ae-3007.aspx
I am no expert on the PT6 at all but probably the biggest gain would be a FADEC controlled inlet. For example the PA46 I fly wastes probably 10% or more fuel because of the fixed intake. For the protection of the engine that is great but if you could some up with an electronic solution which automatically de-ices the inlet, detects ice on the inlet and opens and closes the door when appropriate for ice or in the decent that would be a big gain.
For the PC12 this company claims to have improved the cowling but I think there is no electronic control and it is not cheap:
http://americanaviationinc.com/pilatus/
arj1 wrote:
Jason,“14-stage axial-flow compressor with inlet guide vanes (IGVs) and five variable-geometry-stator stages”
https://www.rolls-royce.com/products-and-services/civil-aerospace/business-aviation/ae-3007.aspx
Yes, I know that variable stators exist. But they just aren’t on the engine we are discussing so the FADEC can’t control them to improve efficiency.
I see your point now!
