Thor - friznit/Unofficial-BDB-Wiki GitHub Wiki
Background
Derived from the PGM-17 Thor intermediate-range ballistic missile, the Thor (BDB Fenris) rocket was the first in a family of space launch vehicles that evolved through four major iterations. Originally intended as an interim general purpose vehicle, Thor and its descendants saw over 300 launches with a 95% success rate. The last derivative of Thor was finally retired in 2018.
There are a huge number of variants as the rocket is continuously upgraded over time with stretched fuel tanks, new engines, upper stages and solid rocket boosters. Most parts have Variant Part Switches in the Part Action Window and the correct variant to select is indicated in parentheses in the build guides.
Thor
The fuel volume of the Fenris-Alpha fuel tank should be set to "Able" or "Delta" respectively. The optional "Stock" setting matches standard stock fuel levels for this size of tank but may imbalance rocket performance.
Tags: Fenris
Variants
| Variants | First Stage | Boosters | Second Stage | Third Stage |
|---|---|---|---|---|
| Thor Able | LR79-NA11 (with 4x fins) | Fenris-LCE Structural Adapter + Fenris-SIF Interstage (Able Config); Alpha Upper Stage | ||
| Thor Able-Star | LR79-NA11 | Fenris-MCA Structural Adapter + Fenris-SSI Interstage; Alphastar Upper Stage | ||
| Thor Burner 2 | LR79-NA11 | Staara 37B + 3-Axis Control | Staara 26B (Burner 2A) | |
| Thor Agena-A | LR79-NA11 | Belle-A Interstage; Belle-A Upper Stage | ||
| Thor Agena-B/D | LR79-NA11 | Fenris-MCA Structural Adapter + Belle Interstage; Belle-B/D Upper Stage | ||
| Thor-Agena B/D (TAT) | LR79-NA13 | 3x Dioscuri 1 | Fenris-MCA Structural Adapter + Belle Interstage; Belle-B/D Upper Stage |
Basic Build Guide
- The Alpha Upper Stage uses the Fenris/Alpha-60 Fuel Tank and JA10 "Alpha" Engine (Easton-12-37 Config).
- Alpha-Star uses the short Fenris/Alphastar-160 Fuel Tank and JA10 "Alphastar" Engine (Fenris-18-104 Config).
Thor-Able rocket. Thor-Delta (which came to be known as simply Delta) is a similar build except the upper stage uses the longer Fenris Alpha II 120 Liquid Fuel Tank and Fenris Alpha Interstage with the part switch set to 'Delta'.
Delta
Originally called Thor-Delta (BDB Daleth) because the upper stage was the fourth iteration after Able, Able-Star and Agena, the rocket soon became known simply as Delta to distinguish it from the USAF programme that continued to develop Thor.
Tags: Daleth
Variants
| Variants | First Stage | Boosters | Second Stage | Third Stage |
|---|---|---|---|---|
| Thor-Delta | LR79-NA11 with fins | Fenris-LCE Structural Adapter + Fenris-SIF Interstage (Delta Config); Alpha Upper Stage | Staara-20-IIA SRM (Optional) | |
| Delta A | LR79-NA11 | Fenris-MCA Structural Adapter + Fenris-SIF Interstage (Delta Config); Alpha Upper Stage | Staara-20-IIA SRM (Optional) | |
| Delta B/C/C1 | LR79-NA11 | Same as Delta A but with Daleth B Upper Stage | Staara-20-IIA SRM (Optional) | |
| Delta D (TAD) | LR79-NA13 | 3x Dioscuri 1 | Same as Delta B | Staara-20-IIA SRM (Optional) |
| Delta E (TAID) | LR79-NA13 | 3x Dioscuri 1 | Fenris-MCA Structural Adapter + Fenris-SSI Interstage; Daleth E Upper Stage | Staara-20-IIA SRM |
| Delta G (TAID) | LR79-NA13 | 3x Dioscuri 1 | No upper stage | |
| Delta J (TAID) | LR79-NA13 | 3x Dioscuri 1 | Same as Delta E | Staara-37DV |
Basic Build Guide
The Delta series uses the same tankage as Thor with variants to the upper stages and structural adapters.
- Daleth B Upper Stage uses the Daleth-B-85 Fuel Tank with a JA10 "Alpha" Engine (Daleth-12-118D Config)
- Daleth E Upper Stage uses the Daleth-E-210 Fuel Tank with a JA10 "Alphastar" Engine (Fenris-18-118E Config)
