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

To: 246810 who wrote (803)	6/16/1998 6:39:00 AM
From: Sword	Read Replies (2) \| Respond to of 3383

"It is again a pleasure to inhale the fresh air at this thread. Let the spirit of harmony prevail." I agree. "The inlet and exhaust ports of this type of engine should be spaced in such a way that the intake and power strokes are longer in time than the compression and exhaust strokes." Yes, and this would have two advantages: 1. Lower throttling losses through the intake ports and exhaust ports (shash already discussed this) and 2. more time for the intake mixture to fill the combustion chamber at the beginning of the power stroke, making the combustion process more efficient. These are good things. The first advantage was known to the compressor industry as well and in the early 80's Copeland Corporation attempted to market an engine that modified the stroke dwell time by designing a innovative cam inside of a compressor. They produced a couple of prototypes that showed excellent performance and then embarked an an aggressive development program that lasted 3 years. They spent $30,000,000 on a factory to produce it. But the compressor was never marketed. It had an inherent flaw that could not be overcome by any engineering, talented or not (I was the lead person assigned to fix the problem). I couldn't come up with a viable, economic solution. It would lock (permanently) on a cold start when used as a heat pump in the dead of winter. What does this have to do with the AENG design? First, it's an example of what can and sometimes does happen later in the development programs of products that look and perform in a revolutionary way when the first prototypes are built. And second, cams used in engines and compressors have bothered me ever since. However, this being said, Shash, who used to contribute to this board but probably was turned off by the bashing going on, has migrated to the Yahoo board. He recently posted this positive view after conversations with some of the players, including Shelby. It's a good read, as well as some of the other posts previous to it, that add more detail to some of his engineering concerns. Follow the thread backwards from this post for your reading pleasure. messages.yahoo.com@m2.yahoo.com -Sword