Thor family
Thor Delta E1
American orbital launch vehicle family with Thor first stage and a delta second stage.
Flights flown17
Success rate94.1%16/17
Payload to LEO540kg
Maiden flight1966-07-01
Peak year19677 flights
Thor Delta E1 is built by McDonnell Douglas of the United States. It first flew on 1 July 1966 and last flew on 1 April 1971.
Flight record
94.1% success rate16 of 17 flown · 1 failed
1966peak 1967 · 7 flights1971
First flight1966-07-01
Latest flight1971-04-01
Failures1
Consecutive successes1
Fastest turnaround27d 1h
Payload
| Low Earth orbit | 540kg |
|---|---|
| Geostationary transfer orbit | 150kg |
Vehicle
| Stages | 4 |
|---|---|
| Length | 28m |
| Diameter | 2.44m |
| Launch mass | 68t |
| Liftoff thrust | 1,450kN |
| Maiden flight | 1966-07-01 |
| Reusable | No |
Pads used
Orbits delivered
Elliptical Orbit4Geosynchronous Orbit4Heliocentric N/A3Low Earth Orbit2Lunar Orbit2Sun-Synchronous Orbit2
Launch history
| Date | Mission | Pad | Orbit | Outcome |
|---|---|---|---|---|
| 1971-04-01 | Thor Delta E1 | Isis 2 | Space Launch Complex 2E | Low Earth Orbit | Success |
| 1969-06-21 | Thor Delta E1 | IMP G | Space Launch Complex 2W | Elliptical Orbit | Failure |
| 1969-02-26 | Thor Delta E1 | ESSA 9 | Space Launch Complex 17B | Sun-Synchronous Orbit | Success |
| 1969-01-30 | Thor Delta E1 | Isis 1 | Space Launch Complex 2E | Elliptical Orbit | Success |
| 1968-12-05 | Thor Delta E1 | HEOS 1 | Space Launch Complex 17B | Elliptical Orbit | Success |
| 1968-11-08 | Thor Delta E1 | Pioneer 9 | Space Launch Complex 17B | Heliocentric N/A | Success |
| 1968-01-11 | Thor Delta E1 | GEOS B | Space Launch Complex 2E | Low Earth Orbit | Success |
| 1967-12-13 | Thor Delta E1 | Pioneer 8 | Space Launch Complex 17B | Heliocentric N/A | Success |
| 1967-11-10 | Thor Delta E1 | ESSA 6 | Space Launch Complex 2E | Sun-Synchronous Orbit | Success |
| 1967-09-28 | Thor Delta E1 | INTELSAT II F-4 | Space Launch Complex 17B | Geosynchronous Orbit | Success |
| 1967-07-19 | Thor Delta E1 | Explorer 35 | Space Launch Complex 17B | Lunar Orbit | Success |
| 1967-05-24 | Thor Delta E1 | IMP F | Space Launch Complex 2E | Elliptical Orbit | Success |
| 1967-03-23 | Thor Delta E1 | INTELSAT II F-3 | Space Launch Complex 17B | Geosynchronous Orbit | Success |
| 1967-01-11 | Thor Delta E1 | INTELSAT II F-2 | Space Launch Complex 17B | Geosynchronous Orbit | Success |
| 1966-10-26 | Thor Delta E1 | INTELSAT II F-1 | Space Launch Complex 17B | Geosynchronous Orbit | Success |
| 1966-08-17 | Thor Delta E1 | Pioneer 7 | Space Launch Complex 17A | Heliocentric N/A | Success |
| 1966-07-01 | Thor Delta E1 | Explorer 33 | Space Launch Complex 17A | Lunar Orbit | Success |
Specifications from Launch Library 2 by The Space Devs, launch records from Space Index. Derived figures are computed here; see sources and method.
Further reading: Wikipedia