That’s another oddball. From what I have understood ”two by four” lumber in US about half inch undersize.Worked in the Construction Industry in Canada for 4 decades & didn’t really go to the lumber store for 38x89s or buy 18mm 1220x2440 sheets of plywood ,,, but we “wood” joke about it.
Maybe they included the weight of the horse
Why not- atmospheric pressure at sea level is about 14.6psi (if we want to use those US hogshead per figleaf or whatever lol) and your average car tyre is usually 32psi to 36psi which means that taking the exact same tyres to the moon (ignoring the temperature extremes) means that to get the exact same 'pressure difference' you'd just drop the tyre pressures from 36psi to 21.4psi and you have the exact same pressure differential...Same here.
(Although I'm not sure about those vacuum-filled tires on the so-called "Lunar" rover.)
Where it absolutely, positively has to be correct for the tire to fit, use inches.
Width? Doesn't matter much. Notice how the bead can move around a lot to fit a "wide" range of rim widths?
Min/Max Tire Size For Rim Width
Tire width can have a dramatic affect by creating more traction on dry road surfaces when using the maximum tire width. Or maybe you're interested in fuel effictiregrades.com
They used to actually cut them 2 inches by 4 inches, but as the wood dried it shrank.
A couple of horses asses can install an A/C unit in 3 days.
Funnily enough- plywood sheets in Australia do come in exactly that 1200x2400mm (or 1.2m x 2.4m), but lumber is also in metricThe actual truth in Canada it is just like what @OffGridForGood wrote ,,, it is like we are Unit Bilingual here
View attachment 195991
Worked in the Construction Industry in Canada for 4 decades & didn’t really go to the lumber store for 38x89s or buy 18mm 1220x2440 sheets of plywood ,,, but we “wood” joke about it
In another hobby of mine, aviation I have to “fathom” yet another unit system “Nautical”. I am just thankful the majority of my time is in hours.
Fathom - Wikipedia
en.wikipedia.org
Being senile does not bother me as much as forgetting things. Now what was it we were talking about?
Nah, it's similar to which is heavier, a ton of dry sand or a ton of wet sand?
Unless alien construction crews as as sloppy as ones here on earth- I suspect there will be a distinct lack of nails lying around....Yes, the pressure would be about right.
But if you drove over a nail and patched it, how would you pump it back up?
View attachment 196033
Anyway, I have recollection from my childhood about the springy fiberglass or something airless tires.
Wheel, Lunar Rover
This is a spare wheel from a lunar roving vehicle (LRV). The LRV was deployed on the moon during Apollo 15, 16 and 17. The tire is made of a woven mesh of zinc-coated piano wire to which titanium treads were riveted in a chevron pattern.airandspace.si.edu
Ok, built by a mattress/box springs manufacturer and wrapped in window screen.
Senility rears its ugly head? "What a terrible thing it is to have lost one's mind. Or not to have a mind at all. How true that is."
Calibration labs have to take into account even the density variations between calibration weights. ”Conventional mass” is for the ideal standard conditions for a weight with 8.0g/cm3 density.
Depends on your definition of "install"
Depends on your location on the planet and height above sea level too
