Találtam egy szöveget:
Tu-244/Tu-2000 - very large transports (600-1,000 seats) and supersonic and hypersonic passenger aircraft. it's a joke :-) of foreign folks.
300 passengers, 9,500km range. Planned new engines for liquid gas (-156° Celsius). Projected to 2010..2015 years.
Another data for Tu-2000 - experimental air-space-craft with aerial launch. 1980s