What Does hp Represent in Power Units?

[sybozo]

What does the unit "hp" means?

I admit that my physics sucks because it has been a long time since I heard the word "physics" but putting that aside, what does the unit "hp" represent/means? I don't remember learning that unit in school.

Eg. An engine develops 85hp

I'm guessing it's a Power unit and if it is, would it be like 85 hp = 8500 watts/J? or would it just be 85hp?

 

[jtbell]

hp = horsepower. Exactly how big it is depends on the horse.

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

Google Calculator gives a value of 1 hp = about 746 watts.

 

[sybozo]

hp = horsepower. Exactly how big it is depends on the horse.

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

Google Calculator gives a value of 1 hp = about 746 watts.

Thank you very much for replying!

 

[Chestermiller]

1 horsepower = 550 ft-lb/sec.