Tronador (Spanish for Thunderer) is a series of Argentine rockets, including the Tronador I and Tronador II vehicles, to develop a liquid-propellant rocket expendable launch system called ISCUL[1] (Inyector Satelital de Cargas Utiles Ligeras, Light-Payload Satellite Launcher).
The Tronador I is an unguided liquid-fueled rocket[2] used for sub-orbital test flights. Its development led to the larger VEx test rocket, testing technologies needed for the Tronador II, which has a guidance system and would be capable of reaching low Earth orbit.[2] Development of the satellite launch vehicle has cost more than 600 million dollars over several years.