Max load on rc cart depending on motor torque

In summary, a RC cart with 4 wheels and rubber tracks has two front wheels powered by two DC motors with a torque of 15[Nm] representing stalled torque. The friction between the wheel axel and body of the cart is minimal, with an axle diameter of 10[mm] and wheel diameter of 100[mm]. The motor can spin at 35-70[rpm] depending on two possible gears. The maximum load it can carry is a subject of debate, with calculations ranging from 15kg to 230kg. However, the maximum force at the wheel perimeter is 300N at stalled torque, assuming the rubber does not slip on the roadway.
  • #1
Stevic
1
0
I'm making a rc cart with 4 wheels with rubber tracks on them. Two front wheels are powered by two dc motors 3.5-15[Nm] torque. Torque of 15[Nm] represent stalled torque.
Let's say that friction between wheel axel and body of cart is minimal. Diamter of axle is 10[mm] and the diameter of wheel is 100[mm]. Motor spins at 35-70[rpm] depending on two posible gears (it's a windscreen wiper motor).
What is maximum load it can carry?

I found some calulations that are totaly different. One of them says it can carry 230kg unlike the other says only 15kg. I guess calculation of 15kg would be maximum lifting force instead of pulling but I'll let you decide what is correct.

Thank you very much!
 
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  • #2
Stevic: Force is measured in Newtons (N). The maximum force at your wheel perimeter is 300 N, which occurs at the stalled torque, if the rubber does not slip on the roadway.
 

1. What is the maximum load that an RC cart can carry?

The maximum load that an RC cart can carry depends on a variety of factors, including the motor torque, weight distribution, and structural integrity of the cart. However, the general rule of thumb is that an RC cart can typically carry a load that is equal to or slightly higher than its own weight.

2. How does the motor torque affect the maximum load on an RC cart?

The motor torque is a crucial factor in determining the maximum load that an RC cart can carry. The higher the motor torque, the more power the motor has to move the cart and its load. Therefore, a cart with a higher motor torque can typically carry a heavier load than one with a lower motor torque.

3. Can the maximum load on an RC cart be increased by using a more powerful motor?

Yes, using a more powerful motor with a higher torque can increase the maximum load that an RC cart can carry. However, it is important to note that increasing the motor torque also increases the strain on the cart's structural components, so it is essential to ensure that the cart is built to withstand the added stress.

4. Are there any safety precautions to consider when determining the maximum load on an RC cart?

Yes, it is crucial to consider safety when determining the maximum load on an RC cart. The weight of the load should not exceed the recommended maximum load capacity of the cart. Additionally, the weight should be evenly distributed to prevent the cart from tipping over or becoming unbalanced while in motion.

5. Can the maximum load on an RC cart be exceeded?

It is not recommended to exceed the maximum load capacity of an RC cart. Doing so can put excessive strain on the cart's motor and structural components and may result in damage or malfunction. It is important to follow the manufacturer's recommendations for maximum load capacity to ensure safe and efficient operation of the cart.

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