This family is composed of:[2][3][4][5][6] Note: Characteristics in italics are design values, they have not been measured yet.
Two RX-1220 rockets were launched at the Karang Papak Air Force Base on December 23, 2018.
[14]Once the solid boosters are fully qualified, LAPAN plans to assemble several of them into multi-stage rockets called Roket Pengorbit Satelit or RPS.
Four staging configurations have been retained so far:[15] Earlier plans for the Pengorbitan-1 and -2 orbital launch vehicles (RPS-420s) were based on the RX-420 engine which was superseded by the RX-450.
As of May 2016[update], integration work is proceeding on variants 3a and 3b, whose engines have all been successfully flight-qualified.