Simplex Multiplicator - does it help?

Joe Riel said:

Quoted message said:

(And even if there were any change in length, it would be very slight,
and perhaps due to some similar "settling" of the individual strands,
not actual linear stretching of the metal.)

This might be a good project for Fogel Labs, should he choose to
accept it.

A simple test is to replace the cable, but leave the housing.

Except that if it's "settling" of the whole system as suggested, then
you'd reintroduce that factor.

I'm not sure I buy into the "shortest path" theory. We'd pull cables
very tight, in hopes that the adjustment would be close enough to
allow just a slight twist on the barrel adjuster to pull out the
slack. (Most of the time that didn't work out as planned, there'd be
too much stretch and we'd have to make a major adjustment at the
barrel... enough so that good conscience and good workmanship required
us to readjust the barrel to a mid point and redo the cable). But, I
don't think there way a possibility of much slack.

I suppose the only way to settle it scientifically would be to measure
the maximum load that you can generate with the lever, then apply that
to a new cable in a pure stretch test (no housings, point to point)
and see what happens.

FWIW, and as Carl's suggested site indicates, it's not so much the
steel stretch as it is the individual strands settling into place
within the cable.

still just me said:

Well, I think my question is answered anyway. I can't stand the feel
of long levers and long pulls. I thought the de-multiplicator's intent
was to give me positive leverage effect, not negative.

Wouldn't negative leverage result in an unstable system?

--
Joe Riel

In article
<[email hidden]>,

still just me said:

Joe Riel said:

Quoted message said:

(And even if there were any change in length, it would be very slight,
and perhaps due to some similar "settling" of the individual strands,
not actual linear stretching of the metal.)

This might be a good project for Fogel Labs, should he choose to
accept it.

A simple test is to replace the cable, but leave the housing.

Except that if it's "settling" of the whole system as suggested, then
you'd reintroduce that factor.

I'm not sure I buy into the "shortest path" theory. We'd pull cables
very tight, in hopes that the adjustment would be close enough to
allow just a slight twist on the barrel adjuster to pull out the
slack. (Most of the time that didn't work out as planned, there'd be
too much stretch and we'd have to make a major adjustment at the
barrel... enough so that good conscience and good workmanship required
us to readjust the barrel to a mid point and redo the cable). But, I
don't think there way a possibility of much slack.

I suppose the only way to settle it scientifically would be to measure
the maximum load that you can generate with the lever, then apply that
to a new cable in a pure stretch test (no housings, point to point)
and see what happens.

Yes. Anchor points of the cable must be taken out of
the measurement, because obfuscating deformation
can occur at the anchors. Must measure between two points
of the straight cable span.

Quoted message said:

FWIW, and as Carl's suggested site indicates, it's not so much the
steel stretch as it is the individual strands settling into place
within the cable.

--
Michael Press