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In lugnet.build, Geoffrey Hyde writes:
>
> I believe it may be possible to achieve control with airflow alone. But I
> would agree that it would be very difficult. You would need feedback both
> on pressure of air and position of cylinder, and a means of combining the
> two to make the air flow smoothly without the sudden decompression.
>
> What this basically means is that both sides of the pistons would probably
> need to be filled with compressed air at the same time, and not just one
> side. This would allow the cylinders to take advantage of the air pressure
> difference between the two sides of the cylinders in order to control their
> extension and retraction, instead of just letting the air rush freely out of
> the end of the valve controlling the cylinder that is not taking in air, as
> is done in the current system. Of course, to balance things out,
> depressurisation equivalent to the amount of movement required would have to
> happen, which is why electronic control would likely be necessary.
Also made more difficult because the displacement at the connecting rod end is
less than at the other end, and it also tends to leak more, especially when
under pressure.
ROSCO
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