Space Transportation Systems J-I Launch Vehicle

Operation Finished

About J-I Launch Vehicle

The J-I launch vehicle is a three-stage solid fuel rocket with the ability to launch an approximately one-ton satellite into low-earth orbit. It was developed in response to expected demands for the launch of smaller satellites. The J-I is the first rocket in Japan to be developed by combining existing rockets. It combines the solid rocket booster (SRB) of the H-II developed by NASDA with the upper stage of the M-3SII rocket developed by the Institute of Space and Astronautical Science (ISAS) of the Ministry of Education. This has enabled rapid development at low cost. Also compared to a large-scale liquid rocket, a solid rocket makes it possible to greatly reduce launch site operations.
The development of the second J-I launch vehicle has been suspended, according to a reexamination in the Space Development plan of space Activities Commission.

Major Characteristics

Overall length 33.1m
Diameter 1.8m
Total weight 88.5t (payload not included)
Guidance system Radio Guidance

Launch Record

Flight No. Launch Date Peyload
1F 2/12/1996 Hypersonic Flight Experiment (HYFLEX)

Flight Sequence