Rajan Wilcox
Alcohol has been used as a fuel in race cars for many years, specifically in Open Wheel and some closed-wheel cars. Top Alcohol Dragsters may use a supercharged methanol-burning engine or an injected nitromethane combination. The use of alcohol as a fuel in race cars was introduced due to its safety benefits. When used in spark ignition engines, alcohol has the potential to reduce NOx, CO, HC and particulates. It also burns at a much cooler temperature and slower than gasoline, making it easier to extinguish with water-based fire extinguishers.
| Characteristics | Values |
|---|---|
| Top Fuel Dragster horsepower | 7,000-11,000 |
| Top Alcohol Dragster horsepower | 4,000 |
| Top Fuel Dragster speed | 300+ mph |
| Top Alcohol Dragster speed | 260-285 mph |
| Top Fuel Dragster time | 3.623 seconds |
| Top Alcohol Dragster time | 5.090 seconds |
| Top Fuel Dragster fuel | nitromethane |
| Top Alcohol Dragster fuel | methanol or ethanol |
| Top Alcohol Dragster fuel efficiency | higher than gasoline |
| Top Alcohol Dragster cost | less expensive than gasoline |
| Top Alcohol Dragster safety | requires protective gear |
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What You'll Learn
- Top Alcohol Dragsters burn methanol or ethanol, not gasoline
- Methanol and ethanol can be derived from fossil fuels, biomass, or carbon dioxide and water
- Alcohol fuel has a high octane rating, increasing fuel efficiency
- Alcohol is safer than gasoline because it's harder to ignite outside the engine
- Alcohol-fuel fires are easier to extinguish than gasoline fires
Top Alcohol Dragsters burn methanol or ethanol, not gasoline
Top Alcohol Dragsters, also known as "alky" cars, are ranked just below Top Fuel dragsters. They are similar in design to Top Fuel dragsters but with a shorter wheelbase and a carbon-fiber body that loosely resembles a production-based automobile. Top Alcohol Dragsters may use a supercharged methanol-burning engine or an injected nitromethane combination. The injected nitro cars do not use a transmission, while the supercharged cars have three forward speeds. Weights vary according to combination but are generally between 1,975 and 2,125 pounds.
Top Alcohol Dragsters were devised in the 1970s as a replacement for the Top Gas class, which burned gasoline. Initially, alcohol dragsters competed against Funny Cars in a category known as Pro Comp, before a separate class, Top Alcohol Funny Car, was created in the 1980s. In Europe, they are called Top Methanol Dragsters and Top Methanol Funny Cars.
Top Alcohol Dragsters may look like Top Fuelers, but they have significant differences. Top Fuel dragsters burn a highly volatile mixture of 90% nitromethane and 10% methanol alcohol. Nitromethane is a highly combustible and explosive fuel that requires thicker cylinder walls in Top Fuel engines to ensure the energy from the fuel burn doesn't blow out the size of the cylinder. On the other hand, Top Alcohol Dragsters generally burn methanol, although some burn ethanol. In some cases, for injected engines with no supercharger, Top Alcohol Dragsters can also burn a percentage of nitromethane.
While Top Fuel dragsters can produce 11,000 horsepower, Top Alcohol Dragsters' output is approximately 4,000 horsepower. Top Fuel dragsters are capable of covering the dragstrip in less than 3.7 seconds at more than 330 mph. In comparison, Top Alcohol Dragsters can go as fast as 285 mph in the quarter-mile, with the quickest elapsed time from a Top Alcohol Dragster at 5.090 seconds.
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Methanol and ethanol can be derived from fossil fuels, biomass, or carbon dioxide and water
Methanol and ethanol are types of alcohol that can be used as fuel for cars at drag races. Methanol, also known as wood alcohol, is considered an alternative fuel under the Energy Policy Act of 1992. It has been used as an alternative fuel for compatible vehicles in the past, but current research focuses on using it as a sustainable marine fuel. Methanol can be produced from fossil fuels, biomass, or carbon dioxide and water. The majority of methanol is currently produced from natural gas, a fossil fuel feedstock. However, it can also be produced from renewable natural gas sourced from landfills, sewage plants, or animal manure farms. This renewable production method results in bio-methanol, which has lower emissions than conventionally produced methanol. Additionally, methanol can be produced using carbon capture technology with renewable feedstocks or by combining green hydrogen with recycled carbon dioxide.
Ethanol, also known as ethyl alcohol or grain alcohol, is a renewable fuel made from various plant materials collectively known as biomass. It is most commonly produced by fermenting the sugar in the starches of grains such as corn, sorghum, barley, sugar cane, and sugar beets. In the United States, 94% of ethanol is produced from corn grain. However, ethanol can also be derived from other sources, such as agricultural residues (e.g., corn and rice stalks), fast-growing trees (e.g., poplar and willow), and grasses (e.g., switchgrass). These alternative sources of ethanol are called cellulosic ethanol and are considered advanced biofuels. While cellulosic ethanol has the potential to reduce the amount of fossil fuel energy used in production, it is not currently economically advantageous for producers.
Furthermore, scientific advancements have been made in the conversion of carbon dioxide, a major greenhouse gas, into ethanol. Researchers from the Brookhaven National Laboratory have discovered that bringing cesium, copper, and zinc oxide together in a specific configuration enables the conversion of carbon dioxide into ethanol. This technology offers a green and zero-net-carbon approach to producing ethanol fuel.
In summary, methanol and ethanol can be derived from various sources, including fossil fuels, biomass, or carbon dioxide and water. The production methods can vary depending on economic and environmental considerations, with ongoing research focused on developing more sustainable and low-carbon solutions.
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Alcohol fuel has a high octane rating, increasing fuel efficiency
Alcohol fuel, specifically ethanol, has a high octane rating, which can increase fuel efficiency. This is because the octane rating of a fuel is a measure of its ability to withstand compression in an internal combustion engine without causing engine knocking. Knocking refers to the rapid heat increase within the cylinder, which can lead to destructive pre-detonation.
The higher the octane rating, the more compression the fuel can withstand before detonating. This means that high-octane fuels enable higher compression ratios, which in turn enable greater engine efficiency and higher performance. Additionally, the use of high-octane fuels allows for more aggressive turbocharging and downsizing/downspeeding, further improving efficiency.
In the context of drag racing, Top Alcohol Dragsters and Top Alcohol Funny Cars are classes of vehicles that compete in NHRA drag racing. These vehicles may use a supercharged methanol-burning engine or an injected nitromethane combination. While methanol is the more popular choice, some dragsters do burn ethanol.
The use of alcohol fuel in these dragsters increases their fuel efficiency and performance. For example, a Top Fuel Dragster boasts 11,000 horsepower and can cover the dragstrip in less than 3.7 seconds at speeds exceeding 330 mph. In comparison, a Top Alcohol Dragster produces approximately 4,000 hp and can reach speeds of up to 285 mph in the quarter-mile.
It is worth noting that while high-octane fuels can improve engine performance and efficiency, they also come with certain challenges. For instance, as octane increases, the specific gravity and energy content of the fuel per unit of weight decrease. This means that more fuel must be burned to produce the same amount of power, which can lead to increased fuel consumption and costs. Additionally, high-octane fuels can be incompatible with stock fuel system components and may require more sophisticated engine management systems to prevent major engine problems.
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Alcohol is safer than gasoline because it's harder to ignite outside the engine
Alcohol is a fuel option for cars in drag racing. The Top Alcohol Dragster class in NHRA features cars that use a supercharged methanol-burning engine or an injected nitromethane combination. The Top Alcohol Dragster can reach speeds of up to 285 mph and can cover a quarter-mile track in 5.090 seconds.
Alcohol is a safer fuel option than gasoline because it is harder to ignite outside the engine. Gasoline is a denser fuel with a higher energy content, making it easier to ignite. Gasoline can ignite outside the engine under less than ideal conditions, and once it is lit, it is challenging to extinguish. In contrast, alcohol burns at a slower rate of around 18 to 22 percent slower, resulting in a less intense fire that is easier to control with standard firefighting equipment. The higher flash point of alcohol, compared to gasoline, makes it a safer automotive fuel, especially considering the vulnerability of a typical car's storage tank.
The safety benefits of alcohol as a fuel were first recognised in the 1970s, when it was introduced as a replacement for the Top Gas class, which used gasoline. While gasoline is more compatible with current fuel systems and widely available, alcohol has advantages in terms of safety and engine performance. When alcohol burns, one of the by-products is oxygen, which enhances the combustion process. Additionally, the cooling effect of alcohol as it vaporises helps to create denser air and cool the engine, contributing to more horsepower.
However, it is important to note that alcohol is not without its drawbacks. It is more expensive to produce than gasoline due to the fermentation and distillation processes involved in its manufacture. Additionally, the flame of an alcohol fire is almost invisible during the day, making it difficult to detect and react to. Despite these considerations, the use of alcohol as a fuel in drag racing and other automotive applications highlights its potential as a safer and more efficient alternative to gasoline.
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Alcohol-fuel fires are easier to extinguish than gasoline fires
Alcohol is used as fuel in drag racing, with Top Alcohol Dragsters burning methanol and a few burning ethanol. These cars can be extremely fast, reaching speeds of up to 285 mph in a quarter mile.
On the other hand, alcohol fires require a carbon dioxide extinguisher or a non-flammable, heat-resistant covering to deprive the fire of oxygen. This is because alcohol is a flammable liquid, and fires involving flammable liquids are classified as Class B fires, which require cutting off the fire's oxygen supply.
It is important to note that trying to extinguish a fire with the wrong method can be dangerous and make the situation worse. Therefore, it is crucial to know the proper ways to put out different types of fires.
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Frequently asked questions
Yes, some cars at the drags use alcohol as fuel. Top Alcohol Dragsters use a supercharged methanol-burning engine or an injected nitromethane combination.
Alcohol has a high octane rating, which increases fuel efficiency. It also has the potential to reduce NOx, CO, HC and particulates. It is also safer than gasoline as it burns at a cooler temperature and is easier to extinguish with water-based fire extinguishers.
Methanol and ethanol are the most common types of alcohol used as fuel.
Gasoline is denser in terms of energy content, meaning it takes less fuel to generate the same power. It is also easier to ignite and more compatible with the materials currently used in fuel systems. However, alcohol is safer as it is less likely to ignite outside the engine and can be extinguished with water.
There are over 200 classes of vehicles in 15 categories or eliminators. These include Top Fuel, Top Alcohol Dragster, Top Alcohol Funny Car, Pro Stock, Pro Stock Motorcycle, Super Comp, Super Gas, Super Street, and Pro Mod.
