"2"^^ . "3"^^ . . "6"^^ . "2.44"^^ . "1975-09-09Z"^^ . "1"^^ . "34.0"^^ . "1982-09-03Z"^^ . . . . "Retired" . "The N-I or N-1 was a derivative of the American 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."@en . "1.3133e+08"^^ . "N-I"@en . . . "7"^^ .