Space flight

Ship Race

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

Try next

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.
Sun Dive Fall to 2.2 solar radii and burn at the bottom of the fall.

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