I have already proven the propeller in flight, the results are spectacular.
Take Off 120 m approximately (before 170m)
CLIMB: 160 km/h 1300 ft/m (before 900 ft/m)
Cruise 190 km/h (before 170 km/h)
Any refrigeration problem in ground, when the 100º C reaches, it stays without variation, (900 rpm). I have observed that increasing the pitch until the revolutions of the motor are 2.500 rpm it increases in almost 5 km/h more the cruise speed. The landing distance has also shortened, since the propeller has less traction when going in pitch short and few revolutions.