Flight Sequence Program
The flight sequence program is a series of scheduled commands that is being sent from the LVDC to the stages of the Saturn vehicle (S-IB/C, S-II, S-IVB and IU) during a mission. They are scheduled in various time bases. In NASSP the LVDC loads a flight sequence program file that is valid for a given mission. The file can be found under Config/Project Apollo.
TBD:
-Explain time bases
-Explain stage code
-List of all available Saturn IB and V commands
Sequences
Initiate LOX Dump (Saturn IB)
Prerequisites: Passivation Enable, Stage 3 (S-IVB), Channel 85
| Event | Time from Event | Stage | Channel |
|---|---|---|---|
| Engine Mainstage Control Valve Open On | -0.2 | 3 (S-IVB) | 30 |
| Engine He Control Valve Open | 0.0 | 3 (S-IVB) | 109 |
Terminate LOX Dump (Saturn IB)
Prerequisites: -
| Event | Time from Event | Stage | Channel |
|---|---|---|---|
| Engine Mainstage Control Valve Open Off | -1.0 | 3 (S-IVB) | 65 |
| Engine He Control Valve Open Off | 0.0 | 3 (S-IVB) | 110 |
Initiate LH2 Tank Blowdown Vent (Saturn IB)
Prerequisites: -
| Event | Time from Event | Stage | Channel |
|---|---|---|---|
| LH2 Tank Vent Valve Open | 0.0 | 3 (S-IVB) | 38 |
Terminate LH2 Tank Blowdown Vent (Saturn IB)
Prerequisites: -
| Event | Time from Event | Stage | Channel |
|---|---|---|---|
| LH2 Tank Vent Valve Close | -3.0 | 3 (S-IVB) | 76 |
| LH2 Tank Ven Valve Boost Close On | 0.0 | 3 (S-IVB) | 77 |
| LH2 Tank Vent Valve Boost Close Off | 2.0 | 3 (S-IVB) | 78 |