Windmill

How it works

• Wind blowing across its sails turns it, and it drives whatever gear it meshes with.
• Wind on the half of the sails above the axle turns it one way, and below the axle the other way. Wind aimed straight at the axle holds it still.
• A loaded windmill turns more slowly. A heavy train can stall it.
• Fans, bellows gusts and rocket exhaust all spin it.

Tips

• Aim the fan at one half of the sails, not at the middle.
• Leave space round the axle, because the sails sweep a wide circle.

Where you'll meet it

You first meet it in level 112, Ill Wind, in chapter 12, Hot Air.

Works with

• Fan
• Bellows
• Gear
• Dynamo
• Rack