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Technology Stocks : Advanced Engine Technologies (AENG)

AENG 0.0001000

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Nov 14 9:30 AM EST

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To: Greg Cummings who wrote (104)	5/13/1998 7:07:00 PM
From: shashyazhi	Read Replies (2) of 3383

Greg, when Watt invented the steam engine a couple of hundred years ago, he had to give potential customers something to compare his engine to. The horse was the most common form of power. So he had a horse on the end of a rotating arm walking in a circle to perform work. He discovered that his horse could raise a weight of 550 pounds one foot in one second. Multiply 550 times 60 seconds, and you can find the amount of weight a horse can lift in one minute. So it works out to 33,000 foot pounds per minute. Watt's original horsepower formula was: Horsepower= (2 X pi X revolutions per minute X torque) divided by 33000. Torque is the twisting force produced by the crankshaft of any engine. It is measured on a device called a dynamometer. These devices were once just a simple device called a "brake", which was not very accurate because it would heat up from friction and start getting grabby or fade completely. Torque is the reaction to the twisting force imparted to the dyno by the crankshaft. The engine turns the dyno one direction and the torque reaction tries to drive it the other way. This is measured by something as simple as a scale or complex as a piezoelectric load cell. Since 33,000 divided by 2 X pi = 5252, the horsepower equation can be simplified to horsepower =( torque X rpm) divided by 5252. If you look at the horsepower chart for the 350 cubic inch Chevy engine you can see that there is a point at 5252 rpm where the torque curve crosses the horsepower curve. This engine is very representative of how engines operate. Usually horsepower curves rise more rapidly than torque curves. They ALWAYS cross at 5252 RPM. The reason that the horsepower curve begins to drop off at higher speeds is because the engines ability to pull fresh air into the engine deteriorates at higher speeds, unless the engine acoustics are tuned for those higher engine speeds. Then the engine would suffer at lower speeds because the intake port velocities would be too low to pull sufficient air into the engine. Now the charts for the OX-2 on their website never get to 5252 RPM. All points after 2500 RPM are projected, not recorded. I am not very satisfied with the charts. The term "Brake Specific" simply means that the reading was obtained on a dynamometer. One of the parameters is Brake Specific Fuel Consumption in pounds per horsepower per hour. This is valuable information, obtained under controlled conditions. Also NOX and hydrocarbon emissions can be accurately recorded on a dyno. I still don't know if the OX-2 works. But I would LOVE to see it work. I like motorcycles. But if you put a powerful four cylinder engine into a motorcycle, the bike becomes very heavy because of the 200-pound engine. An 80-pound OX-2 engine with 159 horsepower would set the motorcycle world on fire. Eddie Lawson probably would agree.

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