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Smoking Fuel?

Old 08-19-2010, 10:59 PM
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Default Smoking Fuel?

Does anyone know if you can add something to your fuel to make it smoke alittle. I'd like to have the exhaust leave a slight trail while flying without just richening up the mixture and loosing power. I don't want to add a smoke system. I just want to experiment with the idea and am wondering if anyone has done this.

Old 08-19-2010, 11:02 PM
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Default RE: Smoking Fuel?

If you put something in your fuel that's not going towards making power, you're loosing power no matter what.
Old 08-20-2010, 12:24 AM
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Default RE: Smoking Fuel?

This sounds like you're looking for a Smoke System. I'd be a little little cautious about additives to the fuel itself to create more than the average required smoke due to what it could do to your engine A search for "smoke system" should answer your questions right here on RCU.
Old 08-20-2010, 05:37 AM
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Default RE: Smoking Fuel?

Fuel additives can be very tough on the glow plug element. I wouldn't suggest adding anything to the fuel. Plugs are expensive and engines even more so. It's just not worth it.
Old 08-20-2010, 06:38 AM
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Default RE: Smoking Fuel?

Use helicopter fuel. It has an additive to make the exhaust visible.
Old 08-20-2010, 07:13 PM
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Default RE: Smoking Fuel?

I run a high percentage of castor in my glow fuel, about 45% and rest synthetic. Castor leaves a much more visible trail than the straight synthetic. Try switching to a fuel with larger percentage of castor. Omega fuel has is about 30% castor and one of the highest blends in RC. Few makers (Sig and Fox come to mind) still make all castor oil fuel.
Old 08-20-2010, 09:16 PM
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Default RE: Smoking Fuel?

I don't know if Morgan's still sells it, but they used to make a special Ducted Fan fuel with a smoke additive. I have some 7.5% Nitro "Frank Tiano Jet A" Omega.
You might want to ask Morgan's if it's still available, or if it's not, maybe they will tell you what it was that was added?
Old 08-20-2010, 10:41 PM
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Default RE: Smoking Fuel?

As others have said: if you add something to the fuel it will hurt the combustion process. You'll either lose power or crud up the plug (& piston/sleeve) or both. Smoke systems work by blowing kerosene, heating oil, diesel or mineral oil into the hot exhaust AFTER the combustion chamber. You could probably add very little to get some noticable exhaust without ruining the performance, but you'd have to play around to find the right amount.

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