How Big of a Motor Do I Need to Move a 12t Cart on Rails at 5m/min?

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To calculate the motor size needed to move a 12-ton cart on rails at 5 meters per minute, key factors include the gearbox ratio, wheel size, and incline of the surface. The cart has a flat surface and uses wheels measuring 230mm. The total mass is confirmed to be 12 tons, which is the maximum load. Determining the gearbox ratio is essential for calculating the maximum torque required from the motor. Accurate specifications will enable a more precise motor size calculation.
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Need to calculate motor size to drive skip dolley system. have the following:
Frame on 6 wheels. Gearbox/motor driving middle pair of wheels.
Total mass 12t
Need to move trolley @ 5m/min

Any thoughts where to begin?
 
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Well I'll take a stab at it,

whats the ratio on your gearbox?

size of wheels?

is the trolley for use on a flat surface or how steep are the biggest inclines?

What sort of load will it be carrying? is 12t the maximum load or just the weight empty?

Once you know those, I think we can figure out the maximum torque needed from your motor.
 
Wheels = 230mm
flat surface
max load = 12t
ratio on gearbox=? Don't know the ration since we need to source it still...
 

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