VP propeller

Since 2 weeks, we are proceeding to new propeller tests, with several models, in the aim to improve performance overall and mainly noise.
Our final choice was for the Kaspar VP, a superb propeller wood / composites, with wide range pitch change based on a hydraulic system (manual or electronic)
Globally we measured a 20% increase of performances.
Such as :
- 3o meters on take-off, when prop set at min pitch, giving max RPM and max torque
+ 200 ft/mn in climb rate
+ 20 km/h on every dedicated speed / engine RPM
-4 liters / hour of fuel (when set at 2/3 max pitch) on eco cruise
-4 dBa of noise, making it really quiet for the crew and the ground.

The dark side of this propeller ?
+ 6 kg added from the DUC propeller.
obvious complexity of installation and manipulation, requiering an extra training.
Cost with manual actuator 3470 Euros.

But definitely this is worth it. I can then recommend it to anyone on Xenon, and for new future owner to order our carbon version saving a lot of weight, thus the installation of this propeller does not penalise the overall weight.