# Torque and power calculation for a crank wheel

• Sudhakar Naidu
In summary, the conversation discusses the possibility of generating free energy using a flywheel and weight attachment. The person asking for help is an electrical engineering student and requests formulas for calculating torque and power at the drive wheel. The conversation concludes that free energy is not possible and the gearing does not affect the energy required to raise the weight.
Sudhakar Naidu
How to calculate torque and power at 'drive wheel' with following inputs and also requirement shown in below picture-
a. Gear ratio, 1: 6
b. Attached 10Kg weight for bigger wheel to make as a crank wheel and diameter is 30inch.
c. Bigger wheel: Consider 180 degree is freely rotates(due to 10kg attached) and remaining 180 degree only we need to drive.
d. if any thing missed, please consider by your self. so i will co-relate later.
Please provide me formulas for the above request?( my background is electrical engineering, so needs help)

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• Gear_with_Crank_wheel1.jpg
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This sounds like homework or a school assignment. Is it?

Yes, it's homework but trying for something extra energy do we get or not?, If we see in youtube there are lots of flyweel free electricity generation but not able to believe those so am trying mathematically is really possible or not.

Not. Free energy isn't possible. It's such a waste of time that it's a banned topic on this forum.

The energy require to raise the 10kg will be =mgh where m=10kg, g=9.81m/s/s and h is the diameter of the wheel.

You might get that energy back as the weight returns to the bottom, less losses due to friction etc.

The gearing has no effect on this.

Sudhakar Naidu said:
Yes, it's homework but trying for something extra energy do we get or not?, If we see in youtube there are lots of flyweel free electricity generation but not able to believe those so am trying mathematically is really possible or not.

@CWatters is correct. Free energy is a forbidden topic on PF. Thread closed.

jim hardy

## What is torque?

Torque is a measure of the rotational force applied to an object, causing it to rotate around an axis. It is calculated by multiplying the force applied by the distance from the axis to the point where the force is applied.

## What is power?

Power is the rate at which work is done or energy is transferred. In terms of torque, power can be calculated by multiplying the torque by the angular velocity, which is the rate at which the object is rotating.

## How is torque and power calculated for a crank wheel?

To calculate torque for a crank wheel, you will need to know the force applied to the crank handle, the distance from the axis to the point where the force is applied, and the length of the crank arm. To calculate power, you will also need to know the angular velocity of the crank wheel.

## Why is torque and power important for a crank wheel?

Torque and power are important for a crank wheel because they determine the amount of force and energy that is transferred to the object being rotated. This is especially important in applications such as engines or bicycles, where the amount of torque and power can affect the performance and efficiency of the system.

## How can torque and power be increased for a crank wheel?

To increase torque, you can increase the force applied to the crank handle or increase the length of the crank arm. To increase power, you can increase the angular velocity of the crank wheel. However, it is important to consider the limitations and constraints of the system before making any modifications to increase torque and power.

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