Space · launch vehicle
N-I
MHI
RETIRED
At a glance
Launches
7
Success rate
85.7%
6 ok · 1 failed
Payload to LEO
1,200 kg
Payload to GTO
360 kg
Manufacturer
Mitsubishi Heavy IndustriesStatus
RetiredFirst flight
09 Sept 1975Reusable
NoHeight
34 mDiameter
2.44 mLaunch mass
131 tLiftoff thrust
—Stages
3Launch cost
—Booster landings
—Links
WikipediaAbout
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.
Source The Space Devs — Launch Library 2
Last checked 29 Sept 2026