Another World’s First Takes First Flight – The 11-bladed Propeller!

https://www.mt-propeller.com/en/entw/about_firsts.htm#11

 
On a PA31T1 equipped with the P&W PT6A-135A turbines, the World's first 11-bladed propeller took the sky with an impressive noise and sound signature.
The very promising results in static thrust, 15% increase over the standard certified 5-bladed propeller, and the jet-noise signature showed another time what could be possible in the propeller developments.

This propeller system combined with a low rpm power supply from a turbine or an electric engine opens new possibilities for performance, efficiency and noise.

Watch the testflight Video 1

Watch the testflight Video 2