Encyclopedia Astronautica
EKR Stage 2

EKR ramjet 160 pixel
Credit: © Mark Wade
Ramjet test vehicle stage. Loaded/empty mass 1,484/1,167 kg. Thrust 6.13 kN. Specific impulse 1580 seconds. Second stage for Eksperimentalnaya krilataya raketa (experimental winged rocket), Mach 3 ramjet. Range 730 km with flight time of 927 seconds. Lift to drag 2.51, wing area 3.31 square meters. Not developed but formed basis for Burya and Buran missiles.

Status: Study 1953.
Gross mass: 1,484 kg (3,271 lb).
Unfuelled mass: 1,167 kg (2,572 lb).
Height: 9.43 m (30.95 ft).
Diameter: 0.65 m (2.13 ft).
Span: 2.02 m (6.62 ft).
Thrust: 6.13 kN (1,378 lbf).
Specific impulse: 1,580 s.
Burn time: 800 s.

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Associated Countries
Associated Engines
  • EKR Ramjet Bondaryuk ramjet engine. 6.130 kN. EKR Stage 2. Study 1953. Isp=1580s. Study for an experimental winged cruise missile. Not developed but formed basis for Burya and Buran missiles. More...

Associated Launch Vehicles
  • EKR Russian intermediate range cruise missile. B Chertok of NII-8 took the preliminary German R-13 cruise missile design and elaborated it, including consideration of the key problem of long-range automatic astronavigation. By 1951 to 1953 Korolev's design bureau had prepared an experimental design, the EKR. I Lisovich had developed a prototype astronavigation system that met the necessary specifications, and solution of basic problems in use of steel and titanium hot airframe technology had been solved at VIAM (All-Union Institute of Aviation Materials) and MVTU Bauman Institute. An expert commission in 1953 examined the EKR design and felt that there were still many technical problems to be solved, most of which were better handled by an aircraft designer rather than Korolev. More...

Associated Propellants
  • Air/Kerosene Ambient air (78 % nitrogen, 21% oxygen, etc.) is scooped up by air intakes and used in turbojet, turbofan, ramjet, scramjet, or other airbreathing engines. It is used to burn aviation-grade kerosene, commercial grade JP-4 or JP-5, their military equivalents, or special high-temperature blends such as those used in the SR-71. More...

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