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Speed,Combat,Scale,Racing => Speed Talk => Topic started by: Dave Edwards on November 20, 2016, 04:47:50 PM
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Got my fox speed in the air and completed the mile from a standing start at the last Middlesex event - right about 87mph. For the guys doing all the cool engine work, use this as a reference: box stock engine, 29%caster, 10%nitro fuel, 8x8apc prop, 5-10mph wind.
If I play with props and get a perfect run on a calm, cool day, probably good for 90+mph.
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What kind of airplane, profile Q rat or full blown pan job?
MM
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Plane was made up specifically for fox race from the scraps lying around the shop.. Kind of a cross between a f2c from the 70s and a tqr. Solid wing, full fuselage, pretty good aerodynamics, a bit heavy but flies great.
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Dave's Fox Speed
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So, just out of curiosity, has any one broken the 90mph mark (one mile from a standing start) with a stock Fox 35? If so, what combination of props/fuel/planes did you use? Likely someone has a sleek fox racer that can do this.
The fastest modified fox 35 I have seen is 107mph, roughly a 20% improvement in speed. If my math is correct (power goes as V^3) that means a 75% boost in power is required.
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87 MPH is the best I've heard for stock engine.
I did 69 at The Brodak with a stock engine and a sport-type airplane. I doubt that the airframe made up the whole 18 MPH. Maybe the solidness of the pan made the engine run better.