Marquardt RJ43The Marquardt RJ43-MA was a ramjet engine used on the CIM-10 Bomarc missile, the D-21 drone, and the AQM-60 drone. They were engineered and built by the Marquardt Corporation.Variants RJ43-MA-3 ramjet; 51 kN RJ43-7 ramjet; 53 kN RJ43-11 ramjet; 53 kN RJ43-20S4 ramjet; 7.3 kNApplications CIM-10 Bomarc Lockheed D-21 Lockheed AQM-60 Kingfisher