ok so u all know here in America we sill use English and Europe uses Metric. Well we are slowly moving to Metric but still have a standard of English.
Ok so explain this…
225/45/17
225mm/45%/17"
Holy wtf? someone totally divided by zero. :banghead
yea dude. Americans are fucking DUMB. wait…
Story 1: On September 23, 1999 NASA lost the $125 million Mars Climate Orbiter spacecraft after a 286-day journey to Mars. Miscalculations due to the use of English units instead of metric units apparently sent the craft slowly off course – 60 miles in all. Thrusters used to help point the spacecraft had, over the course of months, been fired incorrectly because data used to control the wheels were calculated in incorrect units. Lockheed Martin, which was performing the calculations, was sending thruster data in English units (pounds) to NASA, while NASA’s navigation team was expecting metric units (Newtons).
Problem 1 - A solid rocket booster is ordered with the specification that it is to produce a total of 10 million pounds of thrust. If this number is mistaken for the thrust in Newtons, by how much, in pounds, will the thrust be in error? (1 pound = 4.5 Newtons)
Story 2: On January 26, 2004 at Tokyo Disneyland’s Space Mountain, an axle broke on a roller coaster train mid-ride, causing it to derail. The cause was a part being the wrong size due to a conversion of the master plans in 1995 from English units to Metric units. In 2002, new axles were mistakenly ordered using the pre-1995 English specifications instead of the current Metric specifications.
Problem 2 - A bolt is ordered with a thread diameter of 1.25 inches. What is this diameter in millimeters? If the order was mistaken for 1.25 centimeters, by how many millimeters would the bolt be in error?
Story 3: On 23 July 1983, Air Canada Flight 143 ran completely out of fuel about halfway through its flight from Montreal to Edmonton. Fuel loading was miscalculated through misunderstanding of the recently adopted metric system. For the trip, the pilot calculated a fuel requirement of 22,300 kilograms. There were 7,682 liters already in the tanks.
Problem 3 - If a liter of jet fuel has a mass of 0.803 kilograms, how much fuel needed to be added for the trip?
Problem 1 - A solid rocket booster is ordered with the specification that it is to produce a total of 10 million pounds of thrust. If this number is mistaken for the thrust in Newtons, by how much, in pounds, will the thrust be in error? (1 pound = 4.5 Newtons)
Answer: 10,000,000 ‘Newtons’ x ( 1 pound / 4.448 Newtons) = 2,200,000 pounds instead of 10 million pounds so the error is a ‘missing’ 7,800,000 pounds of thrust…an error that would definitely be noticed at launch!!!
Problem 2 - A bolt is ordered with a thread diameter of 1.25 inches .What is this diameter in millimeters? If the order was mistaken for 1.25 centimeters, by how many millimeters would the bolt be in error?
Answer: 1- inch = 25.4 millimeters so 1.25 inches x (25.4 mm/ 1 inch) = 31.75 millimeters. Since 1.25 centimeters = 12.5 millimeters, the bolt would delivered 31.75 - 12.5 = 19.25 millimeters too small!
Problem 3 - In order to calculate how much more fuel had to be added, the crew needed to convert the quantity in the tanks, 7,682 liters, to a weight, subtract that figure from 22,300 kilograms, and convert the result back into a volume (liters).
7,682 liters x (0.803 kilograms/ 1 liter)= 6,169 kg 22,300 kg – 6,169 kg = 16,131 kg 16,131 kg x ( 1 liter / 0.803 kilograms) = 20,088 liters of jet fuel.
Between the ground crew and flight crew, however, they arrived at an incorrect conversion factor of 1.77, the weight of a liter of jet fuel in pounds. This was the conversion factor provided on the refueller’s paperwork and which had always been used for the rest of the airline’s fleet. Their calculation produced:
7,682 liters x (1.77 pounds/liter) = 13,597 which they interpreted as kilograms but was actually the fuel mass in pounds! Then they continued the calculation:
22,300 kg – 13,597 ‘kg’ = 8,703 kg 8,703 kg ÷ 1.77 = 4,916 liters ….so they were actually 15,172 liters short of fuel!
it makes perfect sense otherwise it would read 8.85826772/1.77165354/17 or 225/45/431.8
ur a dumbass haha
45% not mm, sorry
so 3.986220472
hahaha
LOL wow, i knew that too haha :Idiots
Eman finally figured out what his sidewall specs mean and is PISSED OFFFFFF :ahh
it boggles my mind. all these companies , includeing Benet labs, use all metric. everything from the dimensions, tolerances and geo’s all metric. then when they hit the shops they have to convert it. makes 0 sence.
I can never understand why this country has its own fucked up way of measuring and the rest of the world uses the standardized metric system.
Everything metric is a multiple of 10 (or something like that) but here we have all kinds of fucked up shit like measuring distance in miles when a mile = 5280 feet. Who the fuck came up with that number?
Theres really no sense to be made in the whole US measurement system.
in all actuallty the metric system is better … at least in the auto world that i get to deal with
:lol we always mix the two here, at least everyone is good about labeling :lol
true +1
agreed metric is much easier to deal with then SAE. Thats why most manufacturers use it now.
metric > English system.
theres only 3 countries left that use the “standard” system of measurement. even England no longer uses the “british” measurements. go usa?
england still uses it. the problem is the cost factor. converting this country to use metric would cost 1 zillion doll hairs. think about it.
I dont see why the US should switch because everyone else uses metric, we are America, fuck everyone else.
YES YES YES AND YES
metric is better, but we cant switch now, everything we know is MPH and GALLONS
we should totally ditch the inch tho
lol
oh yes, it would be riDICKulously expensive, but it really needs to happen. slowly, over the next 10 years, print and use both on pretty much everything and eventually roll it over.
they do use both, but metric could not ever become the standard in the US. we rely to heavily on SAE, take construction for example. Even other countries like Canada use the SAE system when it comes to lumber and building materials.
I just like to use it when I’m working on my car or cooking.
I’ll take a liter of cola.