willcoughlin@hotmail.com ("Will Coughlin") wrote in
<F198YphVtHeDoNhfhOe000050b8@hotmail.com>:
>I think if you see a dyno sheet and the tq/hp lines never cross,it is
>not really accurate.If it is measured correctly,the tq/hp lines will
>ALWAYS cross each other at 5250 rpm.I have seen this printed and spoken
>by engine builders and dyno test engineers.Just something to keep in
>mind,I could be wrong about this,just like anything else,but I am pretty
>sure about it.TTYL,
Yep, the reason is that a dyno doesn't actually measure horsepower; it
measures torque. Horsepower isn't really a "measurable" quantity; its
calculated from the torque and RPM. The formula is such that HP and torque are
the same at 5250 RPM. I don't have the formula in front of me right now to be
able to post it, but if you see it, its fairly apparent why this is the case.
(I think its something like TQ * RPM / 5250...)
---Jon-
.---- Jon Steiger ----- jon@dakota-truck.net or jon@twistedbits.net ------. | Affiliations: AOPA, DoD, EAA, NMA, NRA, SPA, USUA; Rec & UL Pilot - SEL | | '92 Ram 150 4x4 V8, '96 Dakota V8, '96 Intruder 1400, '96 FireFly 447 | `------------------------------ http://www.cs.fredonia.edu/~stei0302/ ----'
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