I am trying to determine the correct size of anti-vibration suspension mounts to use for suspending a load from my workshop ceiling.
I'm looking at some Traxiflex types as sold by RS and perhaps others.
However, the loadings are specified in daN
I haven't come across that unit before. Does anybody know how it is defined or relates to kg?
.andy
To email, substitute .nospam with .gl
There is a Japanese unit of weight called a dan which is 60kg and confusingly a chinese one which equals 50 kg
probably not much help :-)
Nick Brooks
That would be the Dekanewton (10 Newtons). Near as dammit it is 1kg. (0.980665 for the pedantic)
John Schmitt
others.
Or is it the reciprocal?
Neil
Bugger. 1.02. Still well within any FOS attached. In any case g varies by about 1% around the earth's surface.
John Schmitt
This conversion chart
you wonder how thay can be so accurate
Nick Brooks
It's the reciprocal of .980665 1/10 of standard g. Like the standard atmosphere at
101.325 kPa, the real world is a bit wayward with respect to the theoretical. Gravity is normally measured locally by a pendulum whose period is accurately timed. Some orbiting satellites are also useful.John Schmitt
orbiting
Yes but they've added whole orders of accuracy beyond the six digits of .980665 I could accept 1.019716
Nick Brooks
Please ignore stupid post above
orbiting
Thanks John and Nick
I wondered whether this was a percentage of G thing.
At any rate, the selection criteria for these mounts is 2:1 so 2% won't be an issue.
many thanks
.andy
To email, substitute .nospam with .gl
US conversion booklet that translates some strange old units, but this one is excellent. BTW one that it does not cover that my book does is:
Convert gin to dry martini: conversion ratio is six to one
Peter Scott
That's not quite accurate - it's missing the part about phoning a friend and getting them to describe a photo of a bottle of vermouth...
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