Arcas K-K + Elysium Spacecraft

The Arcas K-K-is the first rocket in the series of Arcas rockets to have the Elysium Spacecraft added.

The Arcas rockets use 4 Ceres K1 staged combustion kerolox engines on the first stage.

The K-K variant uses 2 Iris K-1V electric pump-fed engines on its upper stage.

The Elysium Spacecraft is made of 2 modules: The Aether Crew Capsule and the Persephone Service Module.

The Service module uses 4 hypergolic Hermes Vacuum Thrusters and 8 hypergolic Helios RCS Thrusters for in-space propulsion, and 4 hypergolic Cerberus Motors for its LES system. The service module also has 8 static solar panels, 4 side-mounted 3.35kWh batteries and 4 additional tanks that can be used to store propellant or other spacecraft consumables.

The Aether Crew Capsule can hold up to 4 astronauts and can be configured for specific mission requirements. The heat shield can be made heavier or lighter depending on the entry speeds and the craft can use either 3 or 4 parachutes depending on redundancy and landing speed requirements.

The core and fairing diameter is 3.5m and the upper stage is 3m in diameter, the vehicle's total height is 33.5m