VASIMR (Variable Plasma)

A tier-3 drive.

Stat	Value
Exhaust velocity (vₑ)	50,000 m/s
Thrust	0.05 g
Tier	3
Fuels	remass, xenon
Refuel at	gas-depot, ice-field, water-station

Fit it at a shipyard: POST /api/ship/:id/drive { "drive_type": "vasimr" }.