Believing in manufacturer's HP ratings is like believing in the tooth fairy....
Better they should publish the max torque and and what rpm it is reached....
The G26 max HP is reached at 12,000...The prop that will let it turn 12,000 (it will) would be a dud on the airplane...Max torque is at 9000 rpm... The best prop is a Mejzlik 18-6, that DOES turn 9000 rpm....[8D]