H-I

H-I is Japan's step between the licensed N rockets and the fully Japanese H-II: a Thor-Delta-based first stage topped by a new Japanese liquid-hydrogen second stage. From 1986 to 1992 it flies nine times without a failure, launching communications, weather and Earth observation satellites.

Launches

9

Success rate

100%

0 failures

First flight

12 August 1986

Ajisai

Last flight

11 February 1992

Fuyo 1

Builder

MHI

Height

42 m

Diameter

2.4 m

Stages

3

Boosters

9 × Castor 2

Propellants

Solid, Kerosene / LOX, LH2 / LOX

Payload to LEO

3,200 kg

Payload to GTO

1,100 kg