The physics of an engine

[Gismo R]

If you look at a dyno slip for our cars, you'll notice that the torque peaks out before the power does. How exactly does that happen? I know that torque is the dot product of the force applied and the radius of the object, and that power is the dot product of the force and the velocity. But how does the hp continue to rise after the torque begins to fall? And what velocity is measured. Is it the ?tangental? velocity of the wheel/or flywheel? Maybe I would better understand it if I new exactly how a dyno test worked. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>

Thanks to anyone that can answer this. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/thumbs-up.gif" border="0" valign="absmiddle" alt=':thumbsup:'>