Nitromethane

Nitromethane is a chemical compound with chemical formula CH3NO2.

Applications

Nitromethane is a fuel that is used in racing, particularly in drag racing, to provide more power. When you hear the term "nitro-burning funny car" or "top-fuel dragster", that means that the engine burns nitromethane. Model aircraft fuel contains from 0% to 65% nitromethane.

Related Topics:
Drag racing - Model aircraft

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Nitromethane's chemical formula is CH3NO2. For comparison, gasoline is typically C8H18. The oxygen in nitromethane's molecular structure means that nitromethane does not need as much atmospheric oxygen to burn -- part of the oxygen needed to burn nitromethane is carried in the fuel itself.

Related Topics:
Gasoline - Oxygen

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You need 14.6 kilograms of air to burn a kilogram of gasoline, and only 1.7 kilograms of air for the same amount of nitromethane to burn. A cylinder can only hold so much air on each stroke, and with that amount of air you can burn 8.7 times more nitromethane than gasoline. By pumping in 8.7 times as much nitromethane per stroke, you get about 2.4 times more power per stroke. Gasoline provides 18,000 BTU/pound (42 MJ/kg). Nitromethane provides 5,000 BTU/pound (12 MJ/kg). http://www.geocities.com/n2oinjection/page10.htm The amount of nitromethane also provides some cooling, making the charge a bit denser and increasing power.

Related Topics:
BTU - J

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The flamefront does not move as quickly in nitromethane as it does in gasoline, meaning that there is not enough time to burn all the nitromethane in the cylinder when the engine is running at high RPM. When the exhaust valve opens, burning nitromethane flows out through the exhaust pipe. That is why Funny Cars and dragsters "spit fire" from their exhaust pipes.

Related Topics:
Funny Car - Dragster

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