Co-axial turboramjet Notional LH2-fuelled ramjet engine. Study 1985. Used on Sanger II launch vehicle. |
EKR Ramjet Bondaryuk ramjet engine. EKR Stage 2. Study 1953. Study for an experimental winged cruise missile. Not developed but formed basis for Burya and Buran missiles. |
RD-012U Bondaryuk ramjet engine. Burya. Out of production. 1.2 m diameter ramjet to be used in Burya cruise missile. Thrust is maximum thrust at cruise altitude. Specific impulse is that at cruise design point. First flight 1957. |
RD-018 Bondaryuk ramjet engine. Buran missile, early version. Out of Production. 1.8 m diameter ramjet engine initially considered for Buran M-42. RD-020 adopted later during development. |
RD-020 Bondaryuk ramjet engine. Buran M-42. Development ended 1957. Ramjet for Buran cruise missile. 8,500 km cruise at Mach 3.1 at 18-20 km altitude. |
RJ47 Wright ramjet engine. Development ended 1958. Thrust is maximum thrust at cruise altitude. Specific impulse is that at cruise design point. Used on Navaho G-38 launch vehicle. |
XRJ47-W-5 Wright ramjet engine. Out of production. Thrust is maximum thrust at cruise altitude. Specific impulse is that at cruise design point. Used on Navaho G-26 launch vehicle. First flight 1956. |