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Technology Stocks : Advanced Engine Technologies (AENG) -- Ignore unavailable to you. Want to Upgrade?

To: Greg Cummings who wrote (132)	5/14/1998 6:46:00 PM
From: shashyazhi	Read Replies (2) \| Respond to of 3383

Greg, one of the wonderful things about taking my brain out and playing with it, is that every once in a while, a light bulb comes on, and I learn something new. Re-reading your original OX-2 info, I find that the engine fires four times as often as a conventional four stroke engine. An eight-cylinder Chevy engine would take TWO full turns to fire all eight cylinders. But the OX-2 engine apparently fires SIXTEEN times per revolution! No wonder it hums like a turbine. I believe that it has to fire 40,000 times per minute! I re-calculated BMEP using this information. The answer I get is 190 PSI which is well within the believable range of 70 PSI to 220 PSI. An ordinary passenger car engine calculates about 125 PSI. I also calculated the piston speed. It is a little high at 4905 feet per minute, because of the long stroke. The maximum allowable for a racing engine is 4500 feet per minute. The piston acceleration is near the high limit, too, at 135,000 feet per second, squared. Firing four times as often as a conventional engine, this engine is running 10,000 RPM when the output shaft is turning 2,500 RPM. This is not internal gearing, it is due to whatever mechanism is used in place of a crankshaft. The indication is that this is a HOT ROD version of the OX-2 engine, to impress customers. It would likely have to be de-tuned just a little, for longer life. It is pushing the limits right now, for the ratio of bore to stroke. One way to get more power is to make it bigger. Which means heavier. I don't think it will rev past 2500 RPM. It probably won't survive in this configuration. But if the stroke were shortened and the bore was increased, everything would change. It would rev higher. But it would never need to rev past 3500 rpm. This is equivalent to 14,000 RPM on a conventional engine. AMA Superbike engines rev up to 14,000. Unfortunately, the displacement is too large to race against the Superbikes. They are only 750 CC, now, and they put out 155 horsepower. As to your question about throttling the engine 60%, if the intake port diameter matches the cylinder bore well enough to maintain the gas velocity at between 220 and 450 feet per minute, throttling the engine will reduce the horsepower output and decrease the RPM. But if the ports are too big, opening the throttle to 100% would cause the gas velocity to drop off, and the engine would bog down under load, again slowing down. Good luck with your investment. I will continue to follow the OX-2 story.