Best blades
Explorers (Foundation), mission E6 Wind & Spin, lesson 3 of 6.
Hook
Big sails or small sails? Two blades or four? Let’s find the best!
Fair test
Change only the sail size. Count spins in 5 seconds with the same fan.
Bonus challenge
Try a silly shape, like a star or a heart. Does it still work?
The build
Pinwheel Spinner: Four angled paddles on an axle on a stand. Blow on it, or use a fan, and watch which way it spins.