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The RD-9B jet engine of the MiG-19, cut open

RD-9B · MiG-19

Why does a fighter need an afterburner?

Start the engine, push the throttle, light the afterburner — and see what it costs in fuel.

Start the jet engine

More models

3D right in your phone

Spin it. Take it apart. Run it yourself.

Live 3D models of real machines with real numbers. It’s not a video: press the buttons and watch what happens inside. Works in your phone’s browser.

For teachers: every model ends with a physics problem and its answer — copy it with one tap.