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Diesel Fuel
If you have ever compared diesel fuel and gasoline, you know that they are different. They certainly smell different. Diesel fuel is heavier and oilier. Diesel fuel evaporates much more slowly than gasoline -- its boiling point is actually higher than the boiling point of water. You will often hear diesel fuel referred to as "diesel oil" because it is so oily. Diesel fuel evaporates more slowly because it is heavier. It contains more carbon atoms in longer chains than gasoline does (gasoline is typically C9H20, while diesel fuel is typically C14H30). It takes less refining to create diesel fuel, which is why it is generally cheaper than gasoline. Diesel fuel has a higher energy density than gasoline. On average, 1 gallon (3.8 L) of diesel fuel contains approximately 155x106 joules (147,000 BTU), while 1 gallon of gasoline contains 132x106 joules (125,000 BTU). This, combined with the improved efficiency of diesel engines, explains why diesel engines get better mileage than equivalent gasoline engines. Less evaporation and a higher boiling point makes diesel less flammable then gasoline. "Bob" wrote in message om... Has anyone had experience with the diesel outboard motors? Yanmar makes one as well as a couple of less well known companies. After failing to find an affordable Prout we are looking at a couple of gas outboard powered catamarans. We worry about the explosion factor of a lot of gas aboard. Are we correct in thinking that diesel would provide less chance of explosion? |
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