Engine Model: RD-0410. Manufacturer Name: RD-0410. Government Designation: 11B91. Designer: Kosberg. Developed in: 1965-94. Application: Experimental nuclear engine. Propellants: Nuclear/LH2. Thrust(vac): 35.300 kN (7,936 lbf). Isp: 910 sec. Burn time: 3,600 sec. Mass Engine: 2,000 kg (4,400 lb). Diameter: 1.60 m (5.20 ft). Length: 3.50 m (11.40 ft). Chambers: 1. Thrust to Weight Ratio: 1.80. Country: Russia. Status: Developed 1965-94. First Flight: 1985. Nuclear thermal rocket engine. Propellant LH2. Developed from 1965 through 1980s. Tested at Semipalatinsk test range in 1980s and was "the only operational nuclear engine in the USSR".
Bibliography:- Suborbital flights listing (internet post),
- Golubev, A A, KB KhimAvtomatiki - Straniy Istorii, Vol. 1, Voronezh 1995 via Dietrich Haeseler.