RFDS Western Australia - modifying PC-12's with 5 blade props
One blade more is better Checkers, no torque to worry about.
As Sunny mentions, thrust reduces with airspeed in accordance with the formula,
Thrust = BHP*325/Airspeed(kts)
Thinking out aloud, perhaps the increase in prop solidity with the extra blade allows the thrust to be produced at a lower blade CL and thus reduced induced drag, more of the TQ going to thrust rather than being lost to drag.
The prop manufacturer for the new PC-12 5 blader (MT) cite,
As Sunny mentions, thrust reduces with airspeed in accordance with the formula,
Thrust = BHP*325/Airspeed(kts)
Thinking out aloud, perhaps the increase in prop solidity with the extra blade allows the thrust to be produced at a lower blade CL and thus reduced induced drag, more of the TQ going to thrust rather than being lost to drag.
The prop manufacturer for the new PC-12 5 blader (MT) cite,
- Ground roll distance reduced by approx. 15%
- Take-off distance over 50 ft obstacle reduced by approx. 5%
- Climb performance improved
- Cruise performance improved by up to 5 kts
versus the PC-12 POH/AFM
Last edited by megan; 23rd Nov 2020 at 02:22.
It may or may not be the same as the one on the NGX.
Is that the propeller of the NGX or something different for earlier airframes
The previous 47E MSN 1576 up to 1944 are fitted with the same Hartzell 5-Blade Composite Propeller (Hartzell HC-E5A-3A/ NC10245B).
Still earlier 47E were fitted with four blade aluminium Hartzell , MSN 545, 1001 to 1575
https://www.easa.europa.eu/sites/def...%20%283%29.pdf