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why is the US not Metric
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Simon:
We don't pick pumps based on HP but flow rate and pressure developed and then look at the power consumption and ask ourselves if we have that much power available.

I'm not a redneck! I don't pick things based on power but on performance.....
tooki:

--- Quote from: SerieZ on October 29, 2019, 10:20:40 am ---Post Removed, LOL.

I guess it is allowed for People here in this Forum to vent their unwarranted and insulting feelings against Europeans, the Swiss and people with other Political beliefs but not for those to reply (In an educated matter as well).

Also an explanation of which Rule Violation applies would be nice so we can all learn something here.

--- End quote ---
It’s not unwarranted in a thread whose sole existence is to complain about Americans. Many, many posts in this thread (and others about this topic) aggressively attack Americans, but one statement about my personal experiences with Europeans (and others! The comment literally was about the fact that we get shit from EVERY side, even our own countrymen!) and you can’t take it? Come on.

The part about Europeans not knowing US customary units wasn’t an attack — as I said, it’s not taught in school here, so how would you even be expected to know?  (In contrast, Americans are accused of not understanding metric, even though we are taught it in school alongside US units, and use some metric on a daily basis.)
tooki:

--- Quote from: Simon on October 29, 2019, 10:41:29 am ---Classic example here: https://littlegiant.com/products/hvac/condensate-removal-pumps/vcm-series/vcmx-20-series/

1/30HP? Seriously? What is a thirtieth of a horse power. This is electrically powered and is small. The unit of a HP is too large. What they mean is a mere 25W. I can understand an industrial pump being in HP but not this thing and all I'd still care about is how many horses...... err sorry I mean how much electricity I need to run it. HP is a completely useless unit of measure for something that is practically electronic!

--- End quote ---
Well, obviously it’s what you get when you buy a slice of horse!

All jokes aside, an interesting thing is the difference between e.g. US horsepower and German Pferdestärke (literally “horsepower”, but measured differently).


--- Quote from: jfiresto on October 29, 2019, 02:32:47 pm ---
--- Quote from: Simon on October 29, 2019, 01:38:29 pm ---We don't pick pumps based on HP but flow rate and pressure developed and then look at the power consumption and ask ourselves if we have that much power available.

I'm not a redneck! I don't pick things based on power but on performance.....

--- End quote ---

I am no mechanical engineer, but I think the idea is more along the lines of: quickly choose a plausible size suggested by experience, run the numbers from the datasheet, then possibly go up or down a size to satisfy requirements. Or it could be the marketing folk at work, transmitting a warm, fuzzy, but suggestive feeling about the pump size.

I believe the motor hp is its mechanical power output, not its electrical power input (expressed in hp).

--- End quote ---
Good question. (I don’t know much about motors so I can’t add any clarity.) I do find it curious, though, that here in Europe, they also list car engine power in KW. Even though I know that there’s no intrinsic reason for watts to refer to electrical power only, that is nonetheless the context I’m used to! (And I have no feel whatsoever for how many KW make for a powerful car or not, whereas I do when it comes to cars. Internal combustion cars, at least!)
rsjsouza:

--- Quote from: tooki on October 29, 2019, 03:07:37 pm ---All jokes aside, an interesting thing is the difference between e.g. US horsepower and German Pferdestärke (literally “horsepower”, but measured differently).

--- End quote ---
Similar thing with the Brazilian "cavalo vapor" or CV: slightly less powerful: 735W.
tooki:

--- Quote from: rsjsouza on October 29, 2019, 03:17:48 pm ---
--- Quote from: tooki on October 29, 2019, 03:07:37 pm ---All jokes aside, an interesting thing is the difference between e.g. US horsepower and German Pferdestärke (literally “horsepower”, but measured differently).

--- End quote ---
Similar thing with the Brazilian "cavalo vapor" or CV: slightly less powerful: 735W.

--- End quote ---
Does that literally mean “steam horse”? :)

(Boooo... I wanted to insert emojis of a horse with a puff of wind behind it, but those emoji seem to cause an error in the forum software.)

Anyhow, it looks like that corresponds to what Wikipedia calls a “metric horsepower”, which apparently is what the German PS is.
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