The waterwheel is an ancient water-lifting irrigation tool.

The waterwheel is also called the crane.

The height of the waterwheel is more than 10 meters.

It is supported by an axle with a length of 5 meters and a diameter of 0.5 meters.

The tip of each spoke carries a scraper for wiping and a bucket for water.

The river water rushed in, and the spokes were slowly rotated by the inertia of the water momentum, and the buckets filled with the river water were lifted up step by step.

The shape of the waterwheel is similar to the wheel of a car.

The diameter of the large wheel is about 20 meters, and the small one is more than 10 meters.

It can lift water up to 15-18 meters.

In the center of the spokes are the thick axles and the cross plates twice as many as the wooden buckets.

The flow of water has power, and this power is called hydraulic power.

Turbine is an old-fashioned mechanical device powered by water flow.

What is the speed of the turbine:

1. It is related to water

The greater the difference in water, the faster the speed of the waterwheel.

2. It is related to the flow of water

The more flow of water, the faster the waterwheel will run.

After understanding the working principle of the waterwheel, you can make a satisfactory waterwheel yourself.

1. Make a big wheel.

2. Install some bamboo cylinders on the runner, so that the mouth of the cylinder is facing the direction of the runner (that is, the downstream direction of the water flow), pay attention to the angle of about 45 degrees with the axis of the cylinder.

Otherwise, when pouring water, it cannot be poured.

To the side of the drum cart (where it is convenient for the sink to catch water).

3. Immerse the runner in the water to a certain depth, about 0.8 to 1.0 meters.

4. Install a water trough at a position about 1.0 meters behind the axis of the drum car (the height is lower than the top of the drum car).

In addition, there is an upgraded version of the waterwheel called the keel waterwheel.

A relatively large geared shaft is installed at one end of the shaft, and pedals that can be stepped on are installed at both ends of the shaft.

Install a smaller gear shaft on the other end of the wood slot.

A wooden chain (the so-called keel) is installed between the two gear shafts, and a string plate is fastened to the wooden chain.