Launch Vehicle

N-I

retired

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Specifications

Status: retired
Height: 34 m
Diameter: 2.44 m
Mass: 131,000 kg
Stages: 3
Payload to LEO: 1,200 kg
Payload to GTO: 360 kg
First flight: 1975-09-09
Total launches: 7
Success / Fail: 6 / 1

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.

Payloads it launched · 7