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BAD reaction to different fuel???

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Old 05-26-2003, 01:32 AM
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mjd3
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Default BAD reaction to different fuel???

Ok, Had five or six great flights today. Put an APC 11x5 prop on the cap's os 46 fx and was having a terrific time.

I had been using 10% Cool-Power with 16% oil, plus 2 oz of castor added. Having used up the CoolPower, I filled up with 15% wildcat with 20% oil (16% syth - 2% castor).

First five minutes were fine, and then the engine would not generate full power. I was getting maybe 1000-1500 RPM over idle at full power.

I tried to get it back to the field, but in the end I had to put down in some long weeds. I did manage to level the wings and kill the engine, so damage is minimal (but existant).

Anyway, could my engine problems have had to do with the fuel change? Should I have run a tank through before flying???
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Old 05-26-2003, 03:42 AM
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Default BAD reaction to different fuel???

Carmel NY? A friend of mine who used to live there recently passed away... ANYWAY, switching fuels usually requires an adjustment to the needle valves. Wildcat is a very good fuel and it should perform as well as Coolpower. Recheck your needle settings and optimize them for the new fuel.
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Old 05-26-2003, 08:28 AM
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Default BAD reaction to different fuel???

If you increase nitro you need to open the needle valve. You were probably running lean.

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Old 05-26-2003, 01:19 PM
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Default BAD reaction to different fuel???

Thanks guys. Sorry about the loss of your friend HB.
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