by coppercraft » Tue Apr 20, 2010 6:21 pm
I agree with the GingerBreadMan, more than once, I've seen scornful comments from people who grew up in the metric system (or are recent converts) concerning the US or Imperial system of measurement. I think they're unwarranted because each system had it pluses and minuses. I brew in the metric system because it's a decimal system and because 1 litre of water weighs 1 kg. That's handy because decimals are much easier to work with and, knowing the specific gravity of a material, you can ascertain it's volume by weighing it. It's also a lot easier to do calculations without having to convert from ounces to cups to quarts to gallons and most of all the metric system is universally standardized on the litre. Many times, when I'm looking at a recipe, I'm not sure if it calls for US or Imperial liquid units. On the other hand, I monitor still head temperatures in degrees Fahrenheit because the resolution is finer.
The Imperial linear system was derived from much older and more ergonomically rational values than a fraction of the earth's diameter, mandated by a 18th /19th century tyrant, which later turned out to be erroneous. The decimal system can be applied to either unit base and in the case of the Imperial system (from which the US system was derived) that's been the norm since the industrial revolution. The inch is arguably a better unit for manufacturing since 0.001" is a very realistic limit for machining operations and 0.0001 for grinding operations. In the metric system, tolerances are often given in increments 0.02 or 0.025 for machining tolerances and a decimal point added for grinding operations. Increments of 25 mm are often used in the metric system which is near enough to the inch (25.4mm). The "foot" needs no defense as an ergonomically superior unit and the yard is equally ergonomically friendly. I designed product in the automotive industry for 40 years after the introduction of the metric system to US built vehicles. I can readily convert between metric and Imperial mentally but to this day I find designing in the Imperial system easier and more in line with the process capability limits of the various manufacturing processes.
More than most, Canadians are in a position to judge the merits of the two systems as they live with both worlds, the US and the Canadian. Despite over 30 of official "metrification" most Canadians chose the Imperial system even though the educational system supports metric.
However, i do wish the HD Team would require anyone posting in "non metric" units to stipulate whether it's US or Imperial.