How to Measure Dynamic Torque

[@Hwy49RC]

Working on coming up with an rc car motor dyno and this is an amazingly simple way to measure torque. Wonderful explanation and straightforward formula. Will credit this video when i film and post the build video. Thanks!!!

[@andrebega1867]

This is just..... GREAT!!! ❤❤❤

[@glennedward2201]

You’re the first I’ve seen to do this properly on KZbin. So much bad information out there. Making this compact and replacing the scale with an actual load sensor would also work.

[@dynamictorque6047]

Thank you for your comment, you are very right. The last few frames of the video show two things, a load cell instead of a scale, and the “compact” gearing configuration that will be the most used option. The configuration and scale I demonstrated in the video is to explain the concept.

[@はいこれはロボ子の婚約者]

quite a neat setup. i assume when the motor goes in the other direction you'd need another scale/load cell on the other gear?

[@dynamictorque6047]

Yes

[@juanzentenoJZ]

Excelente explicación.

[@wpengineering5408]

Thanks a lot for your explanation.

[@EgorYildirim]

Wouldnt the maximum torque be when the friction wheel is fully stopped?

[@dynamictorque6047]

Yes, the maximum torque would be when the friction wheel (output) is fully stopped. This is maximum “Static Torque”, because everything has come to a stop. At this point the scale would indicate the maximum “Static Torque”. However, if you want to measure “Dynamic Torque”, you would then control/vary the friction/load at the output (being careful not to bring everything to a stop). This can be done to measure the “Dynamic Torque” at any rpm.

[@D520Hz]

where can i buy that meter machine genius Thanks

[@hans5259]

where did you get the mass of 314 grams?

[@dynamictorque6047]

It was a value on the scale that I saw a lot during the filming of the video.

[@anything_everything_1]

If the size of gears vary, as in the differential of the vehicles, will it affect the force, will the torque still be same as the product of force times length. Take if the grey gears are smaller than blue/red ones

[@dynamictorque6047]

Yes. It will always be the product of force times length

[@anupsebastian9883]

What is the theory? how do i formulate this?

[@dynamictorque6047]

Thank You "WP Engineering", and Thank You for being the first comment.

[@FarikaNurta]

what is the meaning for A ? it's gravity? or rpm?

[@dynamictorque6047]

This is the acceleration constant due to gravity.