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HelicopterMain Discussion › Fuel Mix or Purchase
04-27-2004 02:35 AM  13 years agoPost 1
Bato

rrApprentice

Monterrey, Mexico

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The ever lasting question..... Buy or Mix.

I'm currently using a 20O 15N self made mix and I'm pretty happy with it. The only thing is that since its the only fuel I know I really don't know if I'm missing something.

Aside from this, there is the cost factor. I'm using a 99.5% nitro with the remainign 0.5% being a mix of nitro porpane and nitro ethane. I'm buying this nitro from Price Chemical and I've been getting good results. People that I have talket to insist on using Klotz 100% nitro, but the cost factor 24.50 vs 45.00 makes a great difference. Is there really a differene between 99.5 and 100% nitro when mixing at 15%?

Also, could anyone post their opinions and/or experiences between buying and mixing.

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04-27-2004 03:41 AM  13 years agoPost 2
heckler

rrNovice

Utah, USA

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I am curious... also an old college chemistry major...

Could someone please also post a complete example recipie for say, 15% or 30%?.

If possible avoide shorthand or abreviations.

(for example what exactly is the nitro component made of ?)
Is the alcohol methanol or a mix of alcohols?

A link to a good chemical explanation would be excellent.

Thanks

Dwight

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04-27-2004 05:05 AM  13 years agoPost 3
Phil Cole

rrVeteran

Menlo Park CA

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The alcohol is methanol. Ethanol probably works just as well, but you pay liquour tax on it

The nitro is nitromethane. 15% means 15% of the volume of the fuel is nitromethane.

The oil is whatever you think is good. Some people like synthetic, others think castor is necessary, at least in some proportion. The major fuel manufacturers (Morgan, etc.) also sell oil for those who like to mix their own fuel, or those who think that if some oil is good, more oil must be better.

The amount of oil depends on the type of oil and the application. Typically, 15% fuel has 17% oil. The oil is either 100% synthetic, or a synthetic/castor oil mix, typically 2:1 synthetc:castor.

Coolpower 30% fuel uses a low viscosity oil at 22%.

If you go for the normal 17% oil, you would mix methanol, nitromethane, oil in the ratio 68:15:17 respectively.

Commercial fuel will be dyed to give some visual indication of what it is.

The fuel manufacturers claim to add small quantities of other stuff, like rust inhibitors.

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04-27-2004 05:12 AM  13 years agoPost 4
fuse

rrNovice

singapore

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what kind of dyed to be used in fuel? food colouring?

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04-27-2004 07:11 AM  13 years agoPost 5
Saint728

rrProfessor

Honolulu, Hawaii

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They make special fuel dye if your fuel doesn't have any color, it comes in a liquid or crystal form. Most synthetic oils come colored, like Morgan or Klotz. They are both colored blue/green, red or dark pink so you won't need to add any color in them. I don't think you should add food coloring into your fuel because it's made from a water base.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

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04-27-2004 01:22 PM  13 years agoPost 6
w.pasman

rrElite Veteran

Netherlands

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I think that 0.5% nitropropane and nitrobutane will be fine. I would start worrying only if it would be 0.5% water or 0.5% sand

BTW I dont believe the 100% either. 99.8% is the max I have seen, and there is always a little pollution.

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04-27-2004 01:27 PM  13 years agoPost 7
w.pasman

rrElite Veteran

Netherlands

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I have been mixing for years, 18% carbulin oil, 10 or 15% nitro. Way cheaper than buying pre-mixed stuff - see my website

wouter's website

Switched to 15% last year as engine kept running a bit on the hot side during heavy 3D stuff in the summer weather. Didn't test that yet in hot summer weather.

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