Correct
Jetijs,
You are correct. The wheel is not necessary. You just need a "known circumference" to do the calculations. The major benefits of the wheel are to save one step in the math, and to lower the amount of side force on the shaft. Try what you have, and see if you can develop consistent results over a series of test. If you run three tests, and the measurements are all within 2% of each other, then you can be pretty confident of the lowest number.
Also, if you rig up a hinged frame to hold the scales, then one person can hold both scales quite still, and you can get the rpm reading and other inputs reliably.
Good luck.
Peter
Originally posted by Jetijs
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You are correct. The wheel is not necessary. You just need a "known circumference" to do the calculations. The major benefits of the wheel are to save one step in the math, and to lower the amount of side force on the shaft. Try what you have, and see if you can develop consistent results over a series of test. If you run three tests, and the measurements are all within 2% of each other, then you can be pretty confident of the lowest number.
Also, if you rig up a hinged frame to hold the scales, then one person can hold both scales quite still, and you can get the rpm reading and other inputs reliably.
Good luck.
Peter
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