📊 Analysis
Statistics & insights on rockets and organizations — technology, history, numbers.
Thor Delta A
RetiredMcDonnell Douglas
American orbital launch vehicle family with Thor first stage and a delta second stage.
Key figures
Total launches
2
Successes
2
Failures
0
Success rate
100.0 %
Success streak
2
Maiden flight
Oct 2, 1962
Launch cost
$10 Mio.
Reusable
No
Shortest launch interval ⓘ
25d 1h
Planned launches
0
Thor, Thor-Delta family total
85 launches · 75 successes · 10 failures (15 variants)
🧐 Data check
Automatic plausibility checks — anomalies are surfaced transparently here:
- ℹ️The figures above apply only to the “Thor Delta A” variant. The Launch Library counts each variant separately — the Thor, Thor-Delta family totals 85 launches across 15 variants.
Technology
Length
31 m
Diameter
2.44 m
Launch mass
50 t
Liftoff thrust
667 kN
Stages
3
LEO (low Earth orbit)
250 kg
GTO (geo transfer)
68 kg
Launches per year
of which in our database: 2
Successes Failures Other/planned
History & events
Sources
- Launch Library 2 (The Space Devs)
- Wikipedia