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Freeflyer
Posted on Saturday, June 17, 2006 - 12:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just looked at the specs on Hayabusa and noticed 175hp 100ft.lbs torque where my m2 has about 90hp and 90ft.lbs torque. I would have thought the two, torque and hp were more closely related,and cant see how there can be so much variation. I failed physics can someone explain.
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Smitty808
Posted on Saturday, June 17, 2006 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

power = torque x angular speed
(in this situation:
angular speed is the RPM
power is the instantanious RWHP, meaning the amount of horsepower going to the ground at the moment)

so you could see this as:

(instantanious RWHP) = torque x RPM

so if you have a high amount of torque and the RPM is high, you are going to have a good amount of RWHP at the moment

however, this does not mean that the amount of maximum instintanious RWHP is defined by the amount of torque you have, it end somewhere at your max HP, so you also need to have a high amount of available HP
OR....in english:
torque gets you moving, horsepower maintains it.

4 cylinder sportbikes make HP, and mostly in the high RPMs...you have to clutch them off the line to get a good launch.
V-twin sportbikes make torque, a good launch is but a snap of the throttle away. They pull from the low RPMs all the way up.
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Johnnylunchbox
Posted on Saturday, June 17, 2006 - 01:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Torque is force. Horsepower is a measure of torque over time and distance. Something like that.
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Natexlh1000
Posted on Saturday, June 17, 2006 - 01:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The Suzuki revs higher and maintains the torque for the whole duration.

HP=(torque X RPM)/5252

Imagine two engines that both put out the same torque but one revs twice as high.
It would put out twice the power.
This is almost what you see in your relationship above.

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

So many types of horsepower!!
It's just silly. Metric is the best.
A watt is a watt.
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Blake
Posted on Saturday, June 17, 2006 - 06:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

In linear terms, torque is analogous to thrust. If I have a big enough lever, I can generate a ton of thrust in order to lift an object. But I cannot do so with much quickness. In the linear world, steady state power equals thrust times velocity. In angular terms that translates to torque times angular velocity.

More?
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Cowboy
Posted on Saturday, June 17, 2006 - 07:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Just keep it simple torque-- tlls you how much you can move,
H.P. tells you how fast you can move it.
The rest is for engineers to jaw about.
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Oldog
Posted on Saturday, June 17, 2006 - 10:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The rest is for engineers to jaw about.
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Johnnylunchbox
Posted on Saturday, June 17, 2006 - 10:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

A good primer

http://vettenet.org/torquehp.html
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