[SEL] Flywheel dangers

Rob Skinner rskinner at rustyiron.com
Fri Dec 30 20:54:48 PST 2005


> That, paradoxically, is because it's running less
efficiently on 
> kerosene. The engine slows down and opens its throttle
valve a little 
> more, which lets in enough fuel-air mixture to make a
combustible 
> mixture with the noncombustible exhaust gas remaining in
the 
> clearance 
> space of this low-compression engine. On gasoline it
speeds up more 
> with a power stroke, the governor responds by closing the
throttle 
> further, and the small amount of fuel-air mixture is too
diluted by 
> noncombustible exhaust to fire. As the engine goes on
through 
> its cycle 
> and flushes that charge out, the next one is combustible
AND contains 
> part of the fuel-air mixture that was admitted on the
previous cycle, 
> so it makes a bigger "explosion" in the cylinder, and it
repeats. 
> 8-stroking. The sharp "bark" every other cycle is because 
> more fuel is 
> burning than would be if it fired every cycle. Sometimes
you 
> can get it 
> to settle down and hit every lick while idling on
gasoline, and it'll 
> quieten down more than it will on the slow-burning kero.


Sooooo John...
There are a lot of variables that remain undefined in your
and Arnie's scenarios, so we'll just stick with what's been
said so far.

Your above email states that the engine running on gaso
inducts fuel on every cycle, yet only burns fuel on every
other cycle.  My intuition tells me that would not be very
efficient, yet you claim that it is still more efficient
than an engine running on kerosene that derives power from
every cycle.  

That is indeed a paradox.

Rob






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