Dyno Jet/Mustang Dyno

[HotRoddin]

But the fact remains, Jeff, that measuring HP is incredibly crude, compared with a million other things that we routinely measure now days ... how could roller speed or signal noise be a concern when measuring something that only has to be measured within a couple HP, when everyday we measure minutely small radio signals from a billion light years away, or subtle vibrations from an earthquake, thousands of miles away with a simple PC card ? ... barometric pressure, temp. humidity etc can be very easily measured with radio shack stuff now days, and if you can measure it, you can easily compensate for it.
As for the calculations, you could set that up in a spread sheet, that will, with one keystroke, solve all the calculations in a couple hundred thousands of a second.
If you mean the motor or vehicle measured is varying from one machine to another, i can kind of understand that, but if you're saying the machines themselves vary that much from one to the other then i'm still as baffled as before

Rod