ANSWERS: 2
  • Well, for starters, since you know the diameter of the wheel, you know the circumference too... 23" * pi = circumference. Divide the circumference into the 40 miles worth of inches, and that will tell you how many revolutions per hour you need. Divide that number by 60 to give the RPMs. As for the torque... are you moving the weight horizontally, or vertically? If it's horizontally, how fast do you want to accelerate it to 40 MPH from a dead start? And how much drag will there be? Torque will take a lot more analysis than the RPMS.
  • created an excel sheet. does does all the math ever. i can't think of many other uses for it than the project i'm doing, but i wanted to share it anyway. If anyone wants it lemme know and we'll find a way.

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