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Rocket Staging

Rocket Staging

Drop each stage the moment its fuel runs out, then light the next one once it's clear.

How to play

  • Your rocket has four stages. Watch the fuel gauge on the left.
  • Tap to drop the stage as its fuel runs out. Drop it early and you throw away the last of its fuel, which is the most valuable part. Wait too long and gravity slows you down.
  • Tap again to light the next engine once the falling stage passes the dashed line. Light it too soon and the blast hits the old stage.
  • Your score is the total speed change, Δv, you squeeze out. About 9,400 m/s gets you to orbit.

Keyboard: Space to drop or light a stage, P to pause.

The real thing. Because of the rocket equation, the last few percent of a stage's fuel give the most speed, since by then the rocket is at its lightest. Patience pays off at the end of a plan, too.

Why rockets throw away their tanks

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