Upper Stages - CobaltWolf/Bluedog-Design-Bureau GitHub Wiki

Note on interstages: Interstages attach to hidden nodes in the engine mounts. Using interstages allows for much more flexibility that decouplers and autoshrouds.

Vicenza (Sergeant)

When searching for a cheap solution for helping small probes reach orbital velocity and beyond, BDB engineers came up with a solution that used clusters of Vicenza solid rocket boosters in an 11-3-1 configuration. The design was later encased in a fairing for the Chryslus II rocket. Refer to diagrams for staging information.

Sargeant

Used on:

Etoh (Redstone)
Chryslus (Juno)

Able-Derived (AJ10)

Alpha (Able)

The Alpha upper stage is the first real upper stage created by BDB aming to provied better range and efficiency to launch probes. Alpha upper stage use the same “Alpha” engine as the second stage of the original Viklun rocket Able

Used on:

Viklun (Vanguard)
Muo (Atlas)
Fenris (Thor)

Alphastar (Ablestar)

Ablestar

Used on:

Fenris (Thor)

Metis (Transtage)

The Metis Transtage uses a unique design where the fuel tanks are side by side, rather than stacked vertically. By extending down on either side of the uprated Alphastar engines, the fuel capacity remains roughly the same while overall length is reduced. It includes monopropellant and RCS thrusters.

Used on:

Prometheus III (Titan III)

Daleth-K (Delta-K)

The Daleth-K Transtage is an advanced upper stage using storable propellants. While still using an engine descended from the venerable Alphastar, it uses all new tankage and a unique fairing base.

Delta-K