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Talk about obsolete units

JasonC

Well-known member
bograt said:
I remember  a factor of 1760, does anyone else?

Of course - it's yds / mile, with 5280 being ft / mile.

There again, in flying, altitudes are still given in feet, or multiples thereof, so if a pilot talks of FL50, that's flight-level 50 x 100 =5000', and not just in the UK.
Speeds are given in knots, which of course are nautical miles per hour, where a nautical mile is equivalent to 1 minute of latitude so that the distance from equator to pole is 60 x 90 =4500 NM, whereas the metre is defined as 1 ten-millionth of the same distance.  So in theory 4500 NM = 10,000 km, but actually it turns out to be 8334 km.

Considering all this nonsense, it's a miracle anything works.....
 

kay

Well-known member
Laurie said:
Why did we change from acres to hectares?
I understood acres.

Estate agents still use acres. 1/4 acre garden sounds quite tiny in hectares.
 

Simon Wilson

New member
Laurie said:
Why did we change from acres to hectares?
I understood acres.

Ah, the acre, now this discussion is getting somewhere. Would you be using seven yards to the rod as is customary in these parts?
 

Simon Wilson

New member
Laurie said:
An acre is 1 cricket pitch (or 1 chain) by 10 cricket pitches.
That's very easy to visualise.

Unless you're Cornish and using the Cornish Acre or Cumbrian or North Lancastrian or...
 

traff

Member
JasonC said:
There again, in flying, altitudes are still given in feet, or multiples thereof, so if a pilot talks of FL50, that's flight-level 50 x 100 =5000', and not just in the UK.

Of course flight levels are only used above the transition altitude with the standard setting of 1013mb (or hecto Pascals). FL50 may well be very different from 5000' depending on the actual pressure.
 

kay

Well-known member
Laurie said:
An acre is 1 cricket pitch (or 1 chain) by 10 cricket pitches.
That's very easy to visualise.

According to wiki, a hectare is one Trafalgar Square
 

bograt

Active member
kay said:
Laurie said:
An acre is 1 cricket pitch (or 1 chain) by 10 cricket pitches.
That's very easy to visualise.

According to wiki, a hectare is one Trafalgar Square

So how long does that make a linear Trafalgar, or if you walk it backwards is it a Raglafart? ;)
 

andys

Well-known member
bograt said:
So how long does that make a linear Trafalgar, or if you walk it backwards is it a Raglafart? ;)

I'm pretty sure a Trafalgar is 1805 (or one kill o Nelson).
 
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