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In lugnet.org.ca.rtltoronto, Ben Fleskes wrote:
> <snip>
> > Let me know what you think, including any suggestions for improving the
> > functionality/looks of Big Blue
> >
> > Dave K
>
> Very cool. I can't tell from the pictures, but are your driver wheels on either
> side of the engine set 90 degrees out of phase with the associated timing
> difference on your valve positioning?
>
> Ben
>
> In lugnet.org.ca.rtltoronto, David Koudys wrote:
Yep--did the 90 degree offset--when you watch the video, you can see the wheels
pause 4 times per revolution (using compass points-- NE, SE, SW, NW)--that's
when one phase is done and waiting for the next phase. 4 phases with two
pistons! I thought that was really cool!
Used this page as a starting reference point--
http://www.fifth-r.com/cssoh1/engine/engine-var.htm
but just connected the switch pulleys to a geared down electric motor instead of
using the feedback from the cylinders--the small pneumatic cylinders aren't at
all powerful enough to move the pneumatic switch handles. If I follow thru with
the plan to use the big cylinders, I can put the switches right back into the
whole pneumatic loop.
I didn't mention it earlier but the train is LDCC'd--I had to use two of my DCC
bricks--one for the compressor and one for the motor control.
Dave K
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