N-I
· built by Mitsubishi Heavy Industries
· maiden flight 1975-09-09
Profile data last updated: 2026-08-29T15:37:07.354998+00:00 | 7531-10-18
The N-I or N-1 was a derivative of the American Thor-Delta rocket, produced under licence in Japan. It used a Thor-ELT first stage, a Mitsubishi Heavy Industries-designed LE-3 engine was used as a second stage, and three Castor SRMs. Seven were launched between 1975 and 1982, before it was replaced by the N-II.
Specifications
34.0 mLength
2.44 mDiameter
131 tLaunch mass
2–3Stages
Payload Capacity
1200 kgTo LEO
360 kgTo GTO
Lifetime Launch Record
As reported by Launch Library 2 across this rocket's entire history, not just the launches tracked on this site.
7Total launches
6Successful
1Failed
0Upcoming
Launches Tracked on This Site
7In our archive
85.7%Success rate
Sep 09, 1975 05:30 UTCEarliest tracked
Sep 03, 1982 05:00 UTCMost recent
| Mission | Date | Status |
|---|---|---|
| N-I | Kiku-4 | Sep 03, 1982 05:00 UTC | Success |
| N-I | Ayame 2 | Feb 22, 1980 08:35 UTC | Success |
| N-I | Ayame | Feb 06, 1979 08:46 UTC | Failure |
| N-I | Ume 2 | Feb 16, 1978 04:00 UTC | Success |
| N-I | Kiku 2 | Feb 23, 1977 08:50 UTC | Success |
| N-I | Ume 1 | Feb 29, 1976 03:30 UTC | Success |
| N-I | Kiku-1 | Sep 09, 1975 05:30 UTC | Success |