Vulcan
Vulcan is derived from a mix of Delta IV and Atlas technology. The first stage tanks are derived from Delta IV and powered by methalox-fuelled BE-4 engines, whilst the GEM 63XL SRBs are from Atlas V. An upgraded Centaur V upper stage features a widened tank to match the diameter of the 5.4m core and four RL-10C engines. The Advanced Cryogenic Evolved Stage is still in development but is essentially similar to Centaur V and includes an Integrated Vehicle Fluids combustion engine to re-use the boil off gasses.
The numbering convention for Vulcan is the same as Atlas V, with the first number referring to the fairing diameter, second being the number of boosters and third the number of engines on the upper stage.
Mod: Hephaistos by Superpenguin160 is a standalone expansion to BDB, designed to work either on its own or augmented with BDB parts.
| Launch Vehicle | First Stage | Boosters | Second Stage |
|---|---|---|---|
| Vulcan Centaur 562 | 2x BE4 | 0-6x GEM 63XL | Centaur V DEC |
| Vulcan ACES 564 | 2x BE4 | 0-6x GEM 63XL | ACES |
From top to bottom
- BDB Inon-TG-ACS Avionics & Control System (or Stock Remote Guidance Unit)
- 3.125m Fairing Base
- Hephaistos-ACES-2 Fuel Tank
- Hephaistos-ACES-1 Fuel Tank
- Hephaistos-ACES Engine Mount (ACES or Centaur V config)
- ACES/Centaur V Fuel Cell (in x2 symmetry)
- RL-10C x2 (Centaur V) or x4 (ACES)
- Hephaistos 3.125m Decoupler
- Hephaistos-CCB-1 Fuel Tank
- (Optional) BDB Muo-V-SFS "Bronu" Separation Motor (x8)
- BDB Daleth-CGR-63XL "Lapis II" SRB (place pairs in x2 symmetry)
- Hephaistos-CCB Engine Mount (disable fairing to place SMART recovery parts inside)
- Stock Remote Guidance Unit (place on hidden node inside engine mount)
- Heat Shield 7.5m (place on top of RGU)
- Mk4-R Radial-Mount Parafoil (place on bottom of RGU)
- Hephaistos KE-4 "Amun" Liquid Engine (x2; fairings enabled)
