hp??

[americanjebus]

how come when i look up hp it comes out = to 550ft/lbs and not just 1ft/lb?

im confused.

 

[CTsupra]

what?

 

[SupraMario]

what?

:withstupi

 

[Jeff Lange]

power = (torque * rpm) / 5252

When power is HP and torque is ft/lbs.

 

[souprat]

^^^yeah. hp is the force it takes to lift 550lbs one foot in one second. torque is just in ft/lbs. ever wonder why you never see a dynograph with a flat hp curve? cuz hp output is dependent on torque and engine speed.

 

[CTsupra]

ahh... i know the formula, but i didn't know what he was getting at.

 

[Jeff Lange]

ahh... i know the formula, but i didn't know what he was getting at.

Neither do I, lol.

 

[7MGTEJoe]

how come when i look up hp it comes out = to 550ft/lbs and not just 1ft/lb?

im confused.

Simple answer, because that's how the unit is defined.

Longer answer, horsepower is based on the sustainable work output of a horse and a horse can move lots more than 1 lb per second. Don't expect a measurement system created before Newton was born to have any reasonable scientific units. You'll find more strange units as well, wait until you get into thermodynamics (the BTU is a ridiculous unit). The "standard" system sucks. It's a conglomeration of every unit we've come up with for the last 2000 years with new units slapped on before they even understood what they were measuring.