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this is ggmania.com subsite 'Massive Yet Tiny' engine promises big things - TechAmok

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'Massive Yet Tiny' engine promises big things - [technology]
06:05 AM EDT - Apr,25 2006 - post a comment

Angel Labs has developed a new type of internal combustion engine known as the 'Massive Yet Tiny' engine. It "has the potential to replace all the existing internal combustion engines and jet engines," according to the inventor. It reportedly has a power to weight ratio 40 times higher than a regular internal combustion engine. A 14-inch, 150-pound MYT would reportedly have the same power as a 32 cylinder diesel engine - putting out 858 horsepower.
At 150lbs, the basic ME design needs only to produce 3,000 hp from 848 cubic inches to produce a 20 to 1 power to weight ratio. (We are assuming less than 4 hp per cubic inch of displacement. Racing engines based on conventional design perform up to 5+ hp per cubic inch of displacement with Super/Turbo Charge. With Normally Aspirated, it will generate minimum 850 horse powers.) To our knowledge, only the latest jet engine has finally attained a 20 to 1 power to weight ratio. By replacing the rear cover of the ME and connecting another ME chamber assembly (adding two inches in length and little additional weight) the ME now becomes a 64 cylinder engine with 1,695 cubic inches raising the power to weight ratio up to 40 to 1.  Since the ME lacks the 80% of the parts normally found in a reciprocating internal combustion engine that is responsible for high friction and parasitic losses, this normally dormant horsepower is now available and would increase the total deliverable output of the ME.

Normally, in a compression ignition (diesel) engine, combustion begins @ TDC (Top Dead Center) @ 0 degree crankshaft position. The expanding gases push the piston down on the power stroke, rotating the crankshaft 180 degrees. The piston then returns to TDC pushing the exhaust at the exhaust stroke, rotating the crankshaft another 180 degrees. This is the burning time in a standard engine, a total of 360 degrees duration.

On a dynamometer, an engine's combustion temperatures is typically measured 2″ from the exhaust ports, on the premise that the combustion temperature is very close to exhaust temperature. This is due to the zero degree duration @ TDC and the 360 degrees running duration of a standard engine. However, if @TDC, the piston is allowed to stay for a longer duration, it will burn a greater percentage of the fuel and air mixture in the combustion chamber until oxygen or fuel theoretically runs out at the end of the power stroke, thereby totally completing the combustion process and drastically lowering the exhaust temperature at the end of the exhaust stroke.

The ME design permits the piston dwell @TDC to be adjustable and the prototype ME is currently set at approximately 12 degrees of the crankshaft rotation, thereby approaching the perfection of a complete burn of all fuel. Its exhaust gases are much cooler. As a result:

- More energy is harnessed for the same amount of fuel and air input.
- There is less left over fuel to continue to burn at the exhaust stroke.
- There is less waste and pollution

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