Fully reusable unpiloted verion of MAKS, similar to Interim HOTOL. Air launched from An-225. MAKS was found to have superior payload, lower non-recurring cost and technical risk. MAKS-M would require new materials. Release conditions: Piggy-back, 275,000 kg, 38.0 m length x 24.0 m wingspan, 900 kph at 9,500 m altitude. Effective velocity gain compared to vertical launch 270 m/s. Payload bay 7.0 m long x 4.6 m diameter.
LEO Payload: 5,400 kg. to: 200 km Orbit. at: 51.0 degrees. Payload: 7,000 kg. to a: equatorial, 0 degree, 200 km altitude orbital trajectory. Total Mass: 275,000 kg.