The spec is as follows: O.S FS-91 Surpass II w/Pump. Zinger Pro 15x6 prop. PowerMaster 15% fuel. I believe I tach it at 8900 rpms. The best part about the engine is reliability, smooth unlimited idles and excellent consistent throttle.
@jesknow Hi. Two years ago I purchased an O.S. Max .91 engine. Newer design with the square head. Never ran it yet. I like to buy them and collect them, perhaps make a chess set out of all my engines. Today I purchased the O.S. Max l91 VR-DF ducted fan engine. Eventually I will put that in an airplane. RIght now I'm learning on a flight simulator.
The spec is as follows: O.S FS-91 Surpass II w/Pump. Zinger Pro 15x6 prop. PowerMaster 15% fuel. I believe I tach it at 8900 rpms. The best part about the engine is reliability, smooth unlimited idles and excellent consistent throttle.
rtabcum 1 year ago
What kinda rpms? I run two of these with the pumps on my KMP DC-3 with MAS 12*8 3blade props richened to about 9500rpms.
jesknow 1 year ago
@jesknow Hi. Two years ago I purchased an O.S. Max .91 engine. Newer design with the square head. Never ran it yet. I like to buy them and collect them, perhaps make a chess set out of all my engines. Today I purchased the O.S. Max l91 VR-DF ducted fan engine. Eventually I will put that in an airplane. RIght now I'm learning on a flight simulator.
Helivz 1 year ago