Edwards air show B-1 speed record attempt

On or about Thu, 23 Oct 2003 21:24:18 -0700,
(Harry Andreas) allegedly uttered:

In article , Peter Kemp
peter_n_kempathotmaildotcom@ wrote:

Especially living in the US as I currently do, it drives me nuts to
work in mm, inches and U just to get a single box to fit a rack.

Whoever thought of U as a unit of measurement really needs to suffer
in a major way. The sooner racks become standardised on a metric
measurement, the happier I'll be.

Hate to break it to you, but the U is a metric spec.

1U = 44.45mm = 1.75 inches. It may be definable in terms of mm, but
since it generally applies to 19 inch racks (ugh) I consider it an
imperial measure.

Roll on the replacement by V = 50mm :-) in the 500mm rack (500 mm wide
AND deep).

Oh, and Gene, a U is a unit used to measure the height of equipment in
"standard" 19inch racks of equipments, be they computers, radios, or
any other technical equipment.

Of course, even standard 19 inch racks are not standard, they come in
lots of non-standard depths - which can be a real arse when you fly
somewhere for an installation to discover the rack is particularly
shallow and now you can't close the door :-)

---
Peter Kemp

Life is short - Drink Faster

"PosterBoy" wrote in
news:WnMkb.131957$9l5.102654@pd7tw2no:

"Regnirps" wrote in message
...
Oh, crap! The table uses that French system with the km/hour I can
never make sense of!

I think you mean that nearly universal system with the km/hour.

Known as the SI system, which derives from its French name "Système
Internationale [d'Unités]" (International System [of units]).

From Websters Revised Unabridged Dictionary (1913):
Metric system - a system of weights and measures originating in France...