|Designer||National Institute of Aeronautics and Space|
|Country of origin||Indonesia|
|Spacecraft type||Solid-fuel rockets|
The RX rocket family (Indonesian: Roket Eksperimental) is a series of solid-fuel rockets developed by the Indonesian National Institute of Aeronautics and Space. They are simply named by their diameter in millimeters; for example, the RX-250 has a diameter of 250 millimeters (9.8 in).
This family is composed of:
|Diameter||75 mm||110 mm||122 mm||150 mm||250 mm||320 mm||420 mm||450 mm||550 mm||750 mm||980 mm|
|Length||1.90 m||5.30 m||4.74 m||7.11 m|
|Thrust||19.6 kN||53 kN||52 kN||94 kN||126 kN||255 kN|
|Burn time||2.5 s||6.0 s||9.0 s||12.3 s||19.5 s||14 s|
|Specific impulse||220 s||220 s||220 s||230 s||240 s|
|Propellant||Hydroxyl-terminated polybutadiene (HTPB)|
|Propellant mass||371 kg||425 kg||757-765 kg||1,519 kg|
|Total mass||30 kg||300 kg||532 kg||1718 kg|
|Apogee reached||7 km||70–100 km||40–42 km||43 km||44-84 km|
|Range reached||11 km||25 km||129 km|
|Notes||Characteristics in italics are design values, they have not been measured yet.|
RX-250 was launched eight times from 1987 to 2007. RX-320 was launched twice in 2008 and once again in 2014. RX-420 flew just once in 2009; it is superseded by RX-450 which was launched on 13 May 2015 As of May 2016[update], the next booster version RX-550 is under construction; the larger ones are only on the drawing board.
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:
Earlier plans for the Pengorbitan-1 and -2 orbital launch vehicles (RPS-420s) were based on the RX-420 engine which was superseded by the RX-450.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.
Since 2019, LAPAN's rocket division PUSTEKROKET has collaborated with AASPT and CGWIC of China in designing newer multiple stage sounding rockets. The new rockets will be called RX-452 which combined 400 millimeters (16 in) of first stage, and 450 millimeters (18 in) of second stage. The design is based on TK-32 sounding rocket as well as RX-450. It is expected the newer design to be able to reach above 100 kilometers (62 mi), simulation showed the rocket is able to reach 200 kilometers (120 mi).