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ilowest nitro content?

Old 01-02-2007, 12:59 AM
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JasonFalls
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Default ilowest nitro content?

I was wondering what the lowest nitro content you can use with a surestart....Im a little short on cash so I need something cheap!
Old 01-02-2007, 01:51 PM
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Newc
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Default RE: ilowest nitro content?

OK - What's a 'surestart'? The amount of nitro that should be used is dependent on the specific engine. Most engines for sport activities use 10%. Getting 0% nitro fuel (FAI) may actually cost you more if it has to be special ordered, which most local hobby stores would need to do.
Old 01-02-2007, 02:44 PM
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Charlie P.
 
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Default RE: ilowest nitro content?

Probably zero. Nitromethane lowers the heat of an engine (allowing it to run leaner/faster), but in cold weather cold is bad as you get less efficient runs. If your engine is tuned to a certain % of nitro, that is probably what you should stick to. Crack it a little richer to start and then lean it out before flying once it warms up.

I don't know what a "sure start" is, either. If you mean the 0.049 Cox "Sure Start" engine, no Nitro or maybe 5%.
Old 01-03-2007, 01:35 AM
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Default RE: ilowest nitro content?

I use 5% in my engines. They run fine.
Old 01-03-2007, 01:53 PM
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Default RE: ilowest nitro content?

Our club buys neat methanol in 210liter drums. We buy both Castor and synthetic (hard to find here, but not impossible) and blend our own fuel at less than half hobby shop price. (No Nitro) most of the guys run with no nitro, I add 5% nitro. Only difference I could see is a more unreliable idle, and a very small performance loss. Not a problem for sport flying.

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