P PR Gyro Pilot Newbie Joined Jun 2, 2005 Messages 69 Location Celebration, FL Aircraft Air Command 582 Total Flight Time 350 Jun 9, 2005 #1 what will be a good size prop for a mac 72hp. and what will be the optimum takeoff RPM on the Engine.
what will be a good size prop for a mac 72hp. and what will be the optimum takeoff RPM on the Engine.
C Caribean_gyro Platinum Member Joined Oct 31, 2003 Messages 1,504 Location puerto rico Aircraft twinstar Total Flight Time 500+ Jun 19, 2005 #2 50x30 50x30 depend . I used 50x30 max 3800 rpm TO but it cruise at 3100 60 mph. use more runway but it cruise with less power. chuckp
50x30 50x30 depend . I used 50x30 max 3800 rpm TO but it cruise at 3100 60 mph. use more runway but it cruise with less power. chuckp
C C. Beaty Gold Supporter Joined Apr 16, 2004 Messages 10,101 Location Florida Jun 20, 2005 #3 The propeller of choice for a Mac used to be a Troyer 46-30 or 50-28 but Mr. Troyer has long since passed from the scene. Check with Tennessee Propellers: https://www.tn-prop.com/prop.htm They’re good people and I would go with their recommendations. They get lots of feedback from their customers so you can’t go wrong as to pitch and diameter recommendations.
The propeller of choice for a Mac used to be a Troyer 46-30 or 50-28 but Mr. Troyer has long since passed from the scene. Check with Tennessee Propellers: https://www.tn-prop.com/prop.htm They’re good people and I would go with their recommendations. They get lots of feedback from their customers so you can’t go wrong as to pitch and diameter recommendations.