Sunbird’s high specific impulse (10,000–15,000 s) and 2 MW power mean it can efficiently provide the additional delta-V with minimal propellant, thanks to its fusion-driven exhaust velocity ...

The vehicle is designed to maximize its delta-V capability, so it is mostly propellant and fuel tanks, and powered by Saiph thrusters that operate at a specific impulse (ISP) of 290.

201: Propulsion System Function and Mission Purpose of Spacecraft in the Vehicle Thrust/Weight Ratio vs Specific Impulse Plane (Geolunar Space) CC0 Usage Conditions Apply Click for more information.

261: Radiator Area per Unit Thrust vs Specific Impulse for Electromagnetic and Electrostatic Drives CC0 Usage Conditions Apply Click for more information. There are restrictions for re-using this ...

So if your spacecraft has a delta-v capability of 500 meters per second (1,120 mph), and starts at a velocity of zero, then after it burns all of its propellant it would be traveling at 500 m/s.

Mira’s high delta-v capability (e.g., 500 m/s for a 300 kg payload or 1,200 m/s for a 10 kg payload) and 6DOF control provide unparalleled maneuverability, making it ideal for in-space ...

Max-V engines are designed for a broad range of spacecraft, with power requirements from 200 watts to more than one kilowatt. Six of Phase Four’s original Maxwell engines are currently in orbit.