Prop for vintage pattern w/OS 91 Four Stroke?
09-09-2007, 07:53 PM
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RE: Prop for vintage pattern w/OS 91 Four Stroke?
Most people in SPA are running 13.5x9 APC w/30% Heli CoolPower---assuming you have enough ground clearance. Good luck,....
09-11-2007, 03:25 PM
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RE: Prop for vintage pattern w/OS 91 Four Stroke?
There are lots of different ideas out there about prop sizes and number of blades. All of the answers you got so far will work. Personally I like a two blade Bolly 13 1/2 - 8 Clubman prop. The 30% Heli fuel adds a good bit of power and improved idle and throttle response. I recommend it despite the cost. Also stick with the OS F plugs. The pumped version of the OS 91 isn't required, but I do use it. A 14 oz tank is plenty. I use a 16, but I count the number of pump revolutions and set it up less than full for contest flights.
Best of luck,
Rich Ernst
Best of luck,
Rich Ernst
09-17-2007, 10:13 PM
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RE: Prop for vintage pattern w/OS 91 Four Stroke?
I run Morgans 25% pro pattern, OS .91 and a APC 13.5 x 9 prop on my Intruder and love it. Not a very common prop at most hobby shops though
