Is effort to inflate tire to 80psi double to get 40, or more? - Page 2

Frank Krygowski wrote:

> Jon Isaacs wrote:
> >
> > Heres a question for you about bicycle pumps and dead spaces.
> >
> > There are/were some Japanese built pumps which seem to have a extra chamber which one must also
> > pump up. The one I have in my office has a vertical chamber alongside the pump tube and the
> > pressure gauge is on top of the tube.
> >
> > I am curious what the reasoning behind this odd design was, smooth the pressure pulses for a
> > more accurate reading is all I can figure.
>
> We may own the same pump. That chamber for the gauge always bothered
> me. It was obvious I was doing more work than I needed to, since the pressurized air in that
> chamber was exhausted every time I took the hose off the valve.
>
> I knew it was a small thing, but eventually I unscrewed the chamber and "stuffed" it with some
> plastic beads I happened to have lying around. Less lost volume, and maybe a bit more damping to
> the gauge. Made no obvious difference in effort, but I felt better. ;-)
>
> --
> Frank Krygowski frkrygow@cc.ysu.edu

Political correctness adjustment: "Anal retentive" is now "Detail oriented". ;-}