Tofte Simulators

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Space flight

Fusion Nozzle

How it works, and what it shows: read the note on the blog.

Try next

Ship Race Every version of the fusion ship, and yours, drawn to its own size, launched and raced.
Air Brake Put a heat shield on the ship and let Mars's air do the braking.
The Whole Voyage The best version of the ship, drawn two ways: as the engine would build it, and as a film would.

Every simulator runs on our own engine and shows its working. The notes on the blog explain how they work.