The standard formula to calculate horsepower - at least the formula I've always known and used - is torque times rpm divided by 5252.im curious to know that at 5200 rpm, is the hp and torque the same no matter what kind of bike it is.
any dyno charts available
YOU back there in the back - yeah you -- you just earned yourself detention little mister. Another word and it's straight to the Principal's office...ahh i forgot my calculater oh and my pocket protector
Yes - what do the numbers signify? And are they arbitrary??Any questions?
Torque is usually (in America) measured in foot pounds. the easiest way to picture it is to picture a wrench that is 1 foot long held horizontally on a bolt. If you put a 10 pound weight on the end of the wrench you have generated 10 ft/lbs of torque.Yes - what do the numbers signify? And are they arbitrary??Any questions?
Steve
Horse power is expresses as a number (162 HP) derrived from the above system.Yes, well we're getting there in a roundabout way...
We know how torque is expressed (force applied by 10 lb hanging off the end of a 1 ft bar -or- 1 lb hanging off the end of a 10 ft bar = 10 lbs/ft) - how about horsepower? How is horsepower expressed??
Steve
~~sigh~~Horse power is expresses as a number (162 HP) derrived from the above system.Yes, well we're getting there in a roundabout way...
We know how torque is expressed (force applied by 10 lb hanging off the end of a 1 ft bar -or- 1 lb hanging off the end of a 10 ft bar = 10 lbs/ft) - how about horsepower? How is horsepower expressed??
Steve
The # is arrived at by taking the force applied, times the distance moved, by the time it took.~~sigh~~Horse power is expresses as a number (162 HP) derrived from the above system.Yes, well we're getting there in a roundabout way...
We know how torque is expressed (force applied by 10 lb hanging off the end of a 1 ft bar -or- 1 lb hanging off the end of a 10 ft bar = 10 lbs/ft) - how about horsepower? How is horsepower expressed??
Steve
Yes, and that number is arrived at how??
Geez Mikey, you push the Socratic Method to the very edge, doncha...
Steve
Sorry 06 I cannot agree with yer calculations. It may accidently corrospond on certain Dyno chart, but they're all different.So, in context, we're talking force applied - torque figure - and the distance moved/time it took - rpm - divided by 5252 - conversion - equals a horsepower number.
Grab a calculator, take a look at a dyno chart and you'll see that it works.
As far as the semantics of 'same' goes, I agree - torque and horsepower are not the same, but the number used to express both quantities correspond at 5252 rpm.
Now go outside, sit in the shade and have a cold beer...
Steve
You know, I've been thinking about the purpose behind the '5252', and I honestly can't recall. The formula was given to me years ago (mid 70's) by a high-performance engine builder. It's always seemed to work so I've stuck by it. I'm evidently not the only one who's heard it...Sorry 06 I cannot agree with yer calculations. It may accidently corrospond on certain Dyno chart, but they're all different.
There is no direct conversion for torque to horsepower.
Torque is a twisting force and has no time component.
Horsepower is a measure of work and does include a time component.
I do however agree with the cold beer and shade thing!
YOu cannot divide lb/ft per min by RPM.Using your numbers let's work this out - help me out where I'm off:
33,000 lb/ft per minute = 1hp x 162 (for 162hp) = 5,346,000 lb/ft per minute divided by 10,000 rpm = 534.6 lb/ft per revolution.