O.S. FS40 Project (pre-surpass) - RC Groups
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This thread is privately moderated by Bunnyshooter223, who may elect to delete unwanted replies.
Jul 11, 2017, 08:02 AM
4Stroke Glow Aero | Genesis 8
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O.S. FS40 Project (pre-surpass)


I acquired a used FS40 for cheap. Project engine.

Peter Chinn Test:
weight: 12 ounces
Rpm:
10,200 with 10x6 Top Flite Maple
8,950 with 11x6 Top Flite Maple
8,000 with 12x6 Top Flite Maple
bore/stroke: 21.2 mm x 18.4
bhp: 0.455 @ 11,200 rpm
torque: 50 ounce @ 7k rpm
-bearings used throughout
test conditions: 10% nitro, 11 Celsius, 75% humidity

http://sceptreflight.net/Model%20Eng...S%20FS-40.html

Needs a an o-ring for the rod housing, a low-speed needle, and a throttle arm.
And bearings.
I am in the process of getting instructions.

These little gems are known to be smooth and sip fuel.

This will be a long-term project, since parts may be scarce.
I will check with one of my friends, he has great FS40 wisdom
Last edited by Bunnyshooter223; Jul 15, 2017 at 11:59 AM. Reason: specs
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