OS 91 FS Surpass Prop.
04-24-2010, 09:08 PM
#1
OS 91 FS Surpass Prop.
HI
Me again....
I have a OS FS .91 Surpass engine. It's installed in a World Models Tucano 60 which is a sport model.
I was wondering if you can recommend a prop size for this motor and the RPM range with it.
I am currently using an APC 15x6 prop and it look a bit over sized for the plane and has very little ground clearance.
Thanks for all the help as usual.
Fabio
Me again....
I have a OS FS .91 Surpass engine. It's installed in a World Models Tucano 60 which is a sport model.
I was wondering if you can recommend a prop size for this motor and the RPM range with it.
I am currently using an APC 15x6 prop and it look a bit over sized for the plane and has very little ground clearance.
Thanks for all the help as usual.
Fabio
04-26-2010, 09:20 AM
#2
My Feedback: (11)
RE: OS 91 FS Surpass Prop.
That's too much propeller. We'd use a 13 x 8 prop to start with. Depending upon your needs, you can go as small as a 12 x 9, and up to about a 14 x 6. Larger, and loading becomes an issue. You want the engine to turn in the mid-9,000's when at full throttle and leaned to just rich of peak RPM while on the ground.
