Booster stage.
2m first stage using dual RD-100 Series engines.
| Name | Engine | Flight dates | Success | Failed | Destinations | ||||
|---|---|---|---|---|---|---|---|---|---|
| First | Last | Stage | Lower | Mission | SO | EO | |||
| Nimitz | RD-100 Series | 1952-01-06 | 1952-07-28 | 5 | 1 | - | 4 | 3 | 7 |
| Nimitz I | RD-101 | 1952-01-06 | 1952-05-02 | 2 | 1 | - | 4 | - | 7 |
| Nimitz II | RD-103 | 1952-07-12 | 1952-07-28 | 3 | - | - | - | 3 | - |
| Name | Date | LV | Payload | Destination | Result |
|---|---|---|---|---|---|
| Midway Yorktown 0-1 | 1952-01-06 | Midway-I | Yorktown 0-1 | Low earth orbit | Stage 2 Failure |
| Midway Yorktown 0-2 | 1952-01-26 | Midway-I | Yorktown 0-2 | Low earth orbit | Stage 1 Failure |
| Midway Yorktown 1 | 1952-02-16 | Midway-I | Yorktown 1 | Low earth orbit | Success |
| Midway Yorktown 0-3 | 1952-03-07 | Midway-I | Yorktown 0-3 | Low earth orbit | Stage 3 Failure |
| Midway Yorktown 2 | 1952-03-29 | Midway-I | Yorktown 2 | Low earth orbit | Mission Failure |
| Midway Yorktown 0-4 | 1952-04-14 | Midway-I | Yorktown 3 | Low earth orbit | Stage 3 Failure |
| Midway Yorktown 3 | 1952-05-02 | Midway-I | Yorktown 3 | Low earth orbit | Success |
| Midway II Alpha | 1952-07-12 | Midway-II | [2016 SRP to 640km] | Sub-orbital | Success |
| Midway II Bravo | 1952-07-21 | Midway-II | [2006 SRP to 800km] | Sub-orbital | Success |
| Midway II Charlie | 1952-07-28 | Midway-II | [2006 SRP to 960km] | Sub-orbital | Success |