Gravity Assist Planner - FreeSpaceStore

Simulate gravity slingshots around planets. Compare delta-v savings vs direct transfer.

Mission Setup

Departure Flyby Planet Destination Approach Angle: 45deg Probe Speed: 5 km/s

Mission Results

Direct dv (km/s)

Assist dv (km/s)

dv Saved

Velocity Gain

How It Works

A spacecraft steals orbital energy from a planet by swinging behind it. The planet barely notices, but the probe can gain or lose significant velocity. The trajectory bends due to gravity, like a ball bouncing off a moving wall.