Now add orange connectors to each end of 16 grey rods
and attach them to the base to form the walls of the windmill.
Now build the central platform of the windmill, being careful to ensure that each 3D connector is fitted in the correct way
plus four supports for the grinding axle
and add them to the floor as shown.
Then use white connectors and green rods to make two gear wheels.
Note that we prefer to use these simple gears when recreating historical models with K'NEX. The real gear wheels would have looked similar, but made of wood.
Make the grinding axle by adding to a grey rod:
1. A snap cap black. 2. A gear wheel. 3. A tan clip, with the pin pointing towards the gear wheel. 4. Three white connectors. 5. A silver spacer. 6. A blue spacer. 7. A tan clip, with the pin pointing away from the two spacers.
Push the tan clip along so that the pin engages with the gear wheel.
Then add the grinding axle into the central floor assembly, and add a white connector onto the top of the grey rod, so that it engages with the pin on the tan clip. This white connector will become the turning wheel for the grindstone.
Turn the whole assembly the other way up, and attach it to the frame, as shown.
Be careful that the white connector to be used as the turning wheel for the grindstone does not fall off when you turn the floor assembly over.
It should look like this when assembled.
Next, make the supports for the sail axle
and attach to a red rod:
1. A snap cap black. 2. A gear wheel. 3. A tan clip, with the pin pointing towards the gear wheel.
Push the tan clip along so that the pin engages with the gear wheel, and add:
4. The two axle supports, as shown. 5. Three silver spacers. 6. A blue spacer. 7. A tan clip, with the pin pointing away from the four spacers.
Attach the sail axle to the windmill, so that the two gears engage with each other, as shown.
Your part-complete windmill should now look like this.
Then make the top of the windmill
.and attach it.
Finally make 8 sails for your windmill..
attach them to a white connector
..fit the sails onto the windmill, and secure with a snap cap black.
Your windmill is now complete.
The diagram shows a real windmill with a grindstone.
Grains of corn were fed continuously into the small gap between the lower fixed wheel and the upper turning wheel, which crushed the grains, and released the flour inside ready for packing into sacks.
Turn the sails on your K'NEX windmill. You can see how the gears cause the upper white connector to turn against the lower white connector, so as to create a grinding effect.