Helios Orbital Transfer Vehicle - MEO, GTO, GEO, TLI (Lunar Transfer), Earth Escape - Earth Escape (Mars Transfer): 4,500 kg - Height/Diameter: 6.5/4.5 m - 3 to 9 km/s depending on payload mass - Falcon 9, Falcon Heavy, Starship, Terran R, New Glenn, Vulcan, Neutron, Eclipse, Ariane 6, H3