- Imperial measurements – when are they still used
Last time I checked there were still 24 hours in day and 3600 seconds in an hour. Up you jacques! 🤪
Pipes are weird. Screwed MS (heating) pipe is listed in mm dia but is just the internal diameter in inches converted. As valves, etc, have screwed (BSP) conns are in inches… so, 50mm pipe, 2” valve…
Copper pipe (Table X) is all mm and is the external dia…
Also, my favourite velocity is furlongs per fortnight, that’s a proper measure now…Posted 4 days agosquirrelkingMember
Old BSA barrels were 5.6mm in .22. Modern pellets are indeed 5.56mm, which don’t seal as well so lose power and potentially accuracy. Eley Wasps were available in both so you could choose. Just to confuse matters you can also get Air Arms pellets with different skirt measurements as some match barrels can be pellet fussy.
That’s the one I was thinking of. I have a Diana 52 with a really fussy barrel, slack as a slack thing for some reason. JSB Exacts come in 0.01mm increments as well (though seemingly have as much spread as the next tin depending on the die).
Cougar it could well be Nm depending on if its the force or energy you are measuring.Posted 4 days ago
8′ x 4′ sheet of MDF / Plywwod / OSB
Except when its not – especially OSB. OSB varies between an Imperial equivalent 2444mm and and Metric 2400mm depending on what thickness and grade. I imagine in some instances its sized to be paired with plasterboard which is also a dead 2400mm on the same framing.
A handy way to learn his is to have built all your framing before the truck with 50 sheets of OSB turns up and find non of it fits 🙂Posted 4 days agoCougarSubscriber
Railway track gauges. It’s mainly 4’ 8 1/2”. The Russians, Fins, Indians and Spanish have their own standards though again these are imperial.
Interestingly (no really), 4’ 8 1/2” is also Roman chariot gauge.
Is that actually true?
There’s an apocryphal tale about why railway gauges are related to the size of a horses’ arse, culminating in it being a limiting factor in the design of the Space Shuttle’s engines. How true any or all of it is I’ve mo idea.Posted 4 days ago
Just thought – is this why IKEA mattresses are a weird size? Cos they’re in metric and our king Size is 5 feet?
Ikea seem to be phasing out their metric mattresses and bedding in favour of olde fashioned UK sizes.
Bought new mattress from there last month – I built my bed to fit an ikea mattress but when replacing it they only had one metric mattress left in stock of the one I wanted and only about 10% of the sheets they sell are metric and they don’t stock their whole range in those sized.
Shame if you’re tall because the metric mattresses are longer.Posted 4 days agoslowoldmanSubscriber
I remember Pfund from holidays in Germany as a lad. I’m surprised they still use it.
At school woodwork and metal work were imperial but physics and chemistry metric. As a civil engineer up until the 90s both were interchangeable even though the bricks, pipes, rebar or whatever were in fact all metric by then. Calculations were metric though – apart from a short period working overseas for an American consultant. Moments in kips feet!
Oh I buy meat at the butchers in pounds, though the scales are metric.Posted 4 days agoCountZeroMember
I’m pretty cavalier about measurements, I’ll use whatever’s convenient. I was born in 1954, so all my growing up and education was through the 60’s, as a result I automatically think in pints, miles, pounds, feet, inches, etc. However, I spent most of my working life in print and publishing, which was already moving into metric for paper sizes, using international A, B and C sized paper. Except America uses an A-size that’s Imperial, and a completely different size…Posted 4 days ago
So now everything gets mixed and matches, I use Fahrenheit and centigrade, I have a good idea of how they match – my ideal outdoor temperature is around 70℉, about 20℃,
8-10℃ is about 48-50℉, and on the cool side. I can easily extrapolate from there,
30℃ is too sodding hot!
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