Boingers

[Danny Barrett]

That's exactly what *I* thought... The only thing is, how can you run an EFI
system on it? Also, how can you water cool the engine? if this was easily
attainable, it might make a good car engine (given a suitably designed
engine bay). You wouldn't even need a flywheel....

Basically, the pistons rotate about one "pivot" point, and the rest of the
engine rotates aropund another "pivot" point. Two circular motions, and they
even go in the same direction (it wouldn't be physically possible
otherwise)... One of the downsides would be that it wouldn't be very
responsive to the accelerator pedal, as it has all of that inertia in the
crank-case spinning. But, try as I have (in the past, as well as just now)
to figure out how it might be out of balance, I can't find any reason at
all. If, however, the crank was used like a normal ICE, then I think it
might be a different case (unless some sort of counter-balancing mechanism
is used)..

Danny Barrett.




>It is theoretically possible to create a piston engine without
>recriprocating parts.  The cylinders (I would use a radial design) rotate
>around a central axis  The pistons and connecting rods each rotate around
>an axis that is offset from the central axis by a distance of one half
>the stroke of the engine.  Each of the two assemblies would rotate in a
>balanced fashion.
>
>I'm not quite certain what you mean by "perfect dynamic balance", but the
>point is that the piston isn't being forced to acellerate and decellerate
>some 2000 - 14000 times a minute.  They are simply rotating around a
>fixed point.  They'll tilt back and forth a bit relative to the
>connecting rod, and the rotational velocity of the connecting rod and
>piston will go up and down slightly, but this is nothing compared to the
>constant wobbling back and forth that occurs in a standard piston engine.
>
>If you wanted to make such an engine (valving might be a challenge), you
>could go with heavy pistons if you want.  After all, they aren't forced
>to bounce up and down all the time.
>
>Ray Drouillard
>
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