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Hmm maybe I should clean up my Compressor design and add it to my Lego page
I have expanded on the mini-compressor to make it double action - but full
stroke.
It is about twice as long as the mini pump, and a little wider due to three
24t gears.
Surprised no one else has done this yet - I bet they have.
c s soh wrote in message <37F0C30C.4FEBB0D0@singnet.com.sg>...
> Mario Ferrari wrote:
> >
> > A Lego testing machine for Lego compressors... wow, one of the coolest • Lego
> > things ever seen around!
> > I love the idea and love your implementation, and find your results very
> > useful.
> >
> > BTW, I think that the Ralph Hempel's double-action compressor performs
> > sub-optimally due to the fact that it doesn't use the full stroke of the
> > pumps. Michael Powell's compressor drives the pump with a medium pulley
> > instead of the 24t gear. The distance between two opposed holes in the
> > pulley matches exactly the stroke of the pump, while in the 24t gear the
> > holes are slightly closer.
> >
> > Mario
> >
> > http://www.geocities.com/~marioferrari
>
> Yes, Michael Powell's design complies fully with the Lego geometry which
> I have tried to emphasise all the time in my web pages. It has probably
> reached the theoretical limit of efficiency for the small pump. It will
> be difficult to build another compressor that can surpass his mini
> compressor.
>
> On the other hand, Ralph Hempel's double acting compressor doesn't quite
> match the Lego geometry, so the pump is not compressed fully as you have
> rightly observed. And two pumps are not necessarily better than one.
>
> So it's a question of Lego geometry, really.
> --
> C S Soh
>
> cssoh@singnet.com.sg
>
> http://web.singnet.com.sg/~cssoh
> ...where air is power
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