Rocket file · LV-405
Thor Delta E1
Thor Delta E1 is an expendable launch vehicle built by McDonnell Douglas. It stands 28.0 m tall, lifts 540 kg to low Earth orbit, first flew on 1 July 1966. It has flown 17 times with 16 successes, a success rate of 94.1%. It has nothing on the Launch Library 2 schedule right now.
Specification
Vehicle spec sheet
As listed by Launch Library 2. The cost is Launch Library’s figure, not a quoted price. Figures for rockets outside the sixty most-flown were last read on 2026-11-05.
Flight record
Reliability
About Thor Delta E1
American orbital launch vehicle family with Thor first stage and a delta second stage.
Upcoming flights
Manifest
Thor Delta E1 is retired, and no flight is filed.
All upcoming launchesThor Delta E1 in the archive
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Common questions
- How many times has Thor Delta E1 flown?
- 17 times, with 16 successes and 1 failures.
- What is Thor Delta E1's success rate?
- 94.1%. That's 16 successful flights out of 17 attempts.
- How much can Thor Delta E1 lift to orbit?
- Launch Library 2 lists Thor Delta E1 at 540 kg to low Earth orbit and 150 kg to geostationary transfer orbit.
- Is Thor Delta E1 reusable?
- No. Launch Library 2 lists Thor Delta E1 as expendable, so no stage is recovered to fly again.