Gears & Stars
Interactive explanations of machines, the sky and history. Turn them, take them apart, change the numbers and watch what happens.
Engineering
V‑2 Rocket
Engineering
The V‑2 Rocket
Take apart the first ballistic missile: warhead, tanks, turbopump, guidance and engine.
EngineeringThe V‑2 Turbopump
How hydrogen peroxide steam spun the pumps that fed the engine its alcohol and liquid oxygen.
EngineeringGyros and Guidance
How spinning gyroscopes kept the V‑2 on course, and how their readings steered it.