Saturn IC - friznit/Unofficial-BDB-Wiki GitHub Wiki
Background
Saturn IC and Saturn Multibody are conceptual derivatives of Saturn IB, based on the Eyes Turned Skyward alternate history timeline.
Saturn IC uses the same S-IVB stage built for Saturn IB and Saturn V but with a new J2-S engine. The first stage is replaced by a monolithic S-IE liquid fuel tank powered by a single F-1 engine.
Saturn Multibody is derived from Saturn IC and features a Saturn Common Core (SCC) first stage using the extended S-IF liquid fuel tank, a stretched second stage (S-IVC) and up to 4x Titan-derived UA1207 SRB's. The Heavy variant consists of three SCC first stages strapped together in a configuration reminiscent of Delta IV Heavy or Atlas V Heavy.
Centaur E, essentially a Centaur D with two uprated RL-10 derived engines, can be added as an optional third stage.
Saturn MB designation is prefixed with M (Medium) or H (Heavy) for multibody variants. The first integer indicates the number of boosters and the second corresponds to the upper stage: 2 for S-IVB or 3 for S-IVC.
Tags: Sarnus
Variants
| Launch Vehicle | First Stage | Boosters | Second Stage | Third Stage |
|---|---|---|---|---|
| Saturn IC | Sarnus S-IE | S-IVB | Centaur E | |
| Saturn M02 | Sarnus S-IF | S-IVB | Centaur E | |
| Saturn M43 | Sarnus S-IF | 4x SRB1207 | S-IVC | Centaur E |
| Saturn H03 | 3x Sarnus S-IF | S-IVC | Centaur E |
Basic Build Guide
- S-IF stage uses the same S-IE tank with a 3.3m Extension. S-IF was originally depicted with orange-coloured SOFI but was later retcon'd to the copper-coloured Anodized Aluminium like Atlas V. Both colour options area available.
- Although not mentioned in ETS, the single engine presumably needs some kind of roll control. This build uses 2x Bossart-IE "Finch" engines on the engine mount.
- S-IVB is "the same as used on Saturn V but with J2-S," so assume 2x Ullage Motors as per late Saturn variants.
- S-IVC has over 2x the prop mass of S-IVB so assume a 3m extension judging by the ETS illustrations.
- Centaur E is similar to Centaur D but slightly heavier and with better fuel boiloff profile. Use Centaur D with insulation on until start of Centaur burn.
Upper Stage
- Centaur E (Centaur D tank with insulation on and 2xRL10A-3)
- S-IVB (1xJ2-S)
- S-IVC (S-IVB tank with 3m extension)
First Stage & Boosters
- Sarnus S-IE-16K Liquid fuel tank with 1xF1-A (Saturn IC)
- S-IF 3.3m extension (Multibody)
- Sarnus S-IE Engine mount
- Sarnus-LE1F-2214 "Regor" Liquid engine (Regor-A Config)
- 2x Bossart-IE "Finch" Inline Engine (for roll control)
- 2/4x Prometheus-1207 "Helios" SRB
