Then build the axle assembly by adding to a red rod:
1. A snap cap black. 2. A white connector. 3. A purple clip (the red rod fits through the hole in this clip). 4. A white connector. 5. Three silver spacers. 6. A tan clip facing in the direction shown. 7. Two white connectors. 8. Two silver spacers. 9. A blue spacer. 10. A red connector (the red rod fits through the hole in this connector). 11. A snap cap black.
Now build 8 paddles
and attach them to the axle as shown.
Build the trip hammer
and attach it to the model as shown.
Next make the small assembly shown
position the hammer as shown in the photo
and attach the small assembly, which helps to keep the hammer from jumping out of place.
Your water wheel is now complete.
Turn the wheel to check that the trip hammer goes up and down.
Find a suitable place to test your water wheel with a stream of water. The water may splash all over the place, so a bath or an outside area would probably be best.
Find a source of water that will give a continuous thin stream of water, such as a tap or hosepipe.
Position the flow of water so that it hits the paddles of the water wheel in the direction shown in the photo. The water wheel will turn, making the trip hammer go up and down.
The diagram shows how trip hammers powered by waterwheels were used for hundreds of years.