Product Description
Video and lesson investigations on the topic of sails and wind energy. Key concepts include:
- Sailing dinghies depend on wind for movement.
- The sails transfer the force of the wind into boat movement.
- The sails need to be adjusted and controlled by the sailors.
- Models can be used to experiment with moving air and sails.
- There are many different types of sail.
- Sails on boats are ‘fixed’ sails which are moved along with the wind. Windmill sails revolve and transfer the energy in wind into a driving force for machinery.
- Boat sails are usually made of canvas or nylon because the materials are light enough to billow in the wind and take up little weight.
- These fabrics are tightly woven (non-porous) which stops most of the wind from getting through them.
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