TIL: Metric Horsepower

Today I learned the metric equivalent of horsepower is, horsepower. You’d think someone would have come up with a better name.

https://en.wikipedia.org/wiki/Horsepower

36 points · 15 comments · view on lemmy.world

15 Comments

Nomecks@lemmy.ca · 42 pts · 301d (4 replies)

The metric equivalent, if you're talking about how it's measured in places like Europe, is kilowatts.

Successful_Try543@feddit.org · 19 pts · 301d (3 replies)

You're right, yet there are two definitions of the horse power, the imperial 1 hp ≈ 745.7 W and the metric 1 hp = 735.49875 W. The latter is usually given in its local name, e.g. as PS, cv, … etc., while the imperial is usually hp independent of the language of the document.

As you said, in Europe, quantifying the power of a machine (e.g. a car) in horse powers is supplementary only and thus, does not suffice on its own, the data must always be given in kW.

B0rax@feddit.org · 5 pts · 301d (1 reply)

Yet somehow people still use PS or horsepower in everyday language. At least in Germany.

Successful_Try543@feddit.org · 3 pts · 301d

One reason is probably that the power in PS is a 36 % larger number than in kW.

EpicFailGuy@lemmy.world · 3 pts · 300d

to further complicate things ... we also use:

  • BHP (Brake Horsepower)
  • SAE HP (Society of Automotive Engineers)
  • WHP (Wheel Horse power)

and a few others (when talking about vehicles at least)

We're a mess

aeronmelon@lemmy.world · 12 pts · 301d (2 replies)

As far as arbitrary units of measurement go, horsepower and candlepower at least sound cool.

BussyCat@lemmy.world · 4 pts · 300d

I had not heard of candle power before but foot-candles always gets a chuckle out of me for ridiculous name

Krudler@lemmy.world · 1 pts · 301d
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HootinNHollerin@lemmy.dbzer0.com · 10 pts · 301d

Watts

blaue_Fledermaus@mstdn.io · 8 pts · 301d (6 replies)

In Portuguese it's called steam-horse (cavalo-vapor)

quediuspayu@lemmy.dbzer0.com · 4 pts · 301d

It's the same in Spanish and Catalan

mitram2@lemmy.pt · 3 pts · 301d (4 replies)

Never heard of anyone using it. Is it mostly used by technicians?

blaue_Fledermaus@mstdn.io · 4 pts · 301d

I think I only heard/read it once or twice, but yes, I think most shorten it to just cavalos

Successful_Try543@feddit.org · 3 pts · 301d (2 replies)

How are cars advertised in Portugal? In Germany, Pferdestärken (PS) is commonly used.

mitram2@lemmy.pt · 6 pts · 301d (1 reply)

In Portugal, we usually just say "Cavalos" (horses)

Pferd is horse, right? What is "stärken"?

Successful_Try543@feddit.org · 5 pts · 301d

Yes, Stärke means strength (could also mean starch, but not in this case), Stärken here is (Dative case) plural.