World 2 · Catch the Wind · 11 min · PRO
Blades, pitch and tip speed
Controlling the machine
PRO · Energy Island
World 2: Catch the Wind is part of PRO
The first world of Energy Island is free. PRO opens the other 20 lessons in 5 worlds — simulations, quizzes and all.
PRO includes
- All 60 labs — every world, every lesson
- Practice exams and certificates
$8.33/mo, billed yearly ($99.99) · or $39.99 monthly