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
- Thrust
- —
- Height
- 34 m
- Diameter
- 2.44 m
- Launch mass
- 131 t
- Stages
- 3
- Launch cost
- —
- LEO capacity
- 1,200 kg
- GTO capacity
- 360 kg
- GEO capacity
- —
- SSO capacity
- —
Vehicle specifications from Launch Library; blanks are unpublished figures.
Flight record
Flights
7
Launches with a definitive outcome
Success rate
85.7%
6 of 7
Current success streak
2
Landings
0
0 attempts · 0 droneship / 0 RTLS
Fastest turnaround
—
Between consecutive booster flights
Counted from padside's own launch record — the same basis as the Stats page.
Launches
- N-I | Kiku-4 — Success
- N-I | Ayame 2 — Success
- N-I | Ayame — Failure
- N-I | Ume 2 — Success
- N-I | Kiku 2 — Success