Stavatti Aerospace has formally entered the U.S. Air Force’s Next Generation Air-refueling System (NGAS) competition, offering two concepts: the SM-940K, a high-speed conventional tanker, and the SM-635, a low-observable blended-wing design for stealth-focused operations.
The SM-940K features a maximum fuel offload of 300,000 pounds (136,000 kg) and can refuel up to three aircraft simultaneously via flying boom and hose-and-drogue systems. Its combination of long range, fast cruise speed, and high offload capacity aligns with NGAS objectives for multi-role flexibility, extended on-station time, and support for both manned and unmanned aircraft.
Derived from Stavatti’s SM-920 airliner technology, the SM-940K incorporates advanced metal sandwich construction, an M-wing planform for reduced drag, and variable-geometry inlets. Maximum cruise speed reaches Mach 0.97, ferry range is 25,023 km, and typical refueling radius is 7,756 km. Estimated flyaway cost is $300 million, with per-hour operating cost around $18,623.
Performance comparisons show SM-940K surpassing existing heavy tankers such as KC-10A, KC-135R, and Airbus A330 MRTT in range, fuel transfer capability, and useful load. Dual refueling compatibility with boom- and probe-equipped aircraft supports flexible, multinational operations.
The SM-635 concept focuses on low observability, offering survivable tanker capabilities for contested environments. Together, Stavatti’s submissions address both high-capacity conventional and stealth-focused requirements, presenting a comprehensive approach to the USAF’s next-generation tanker needs.
Founded in 1994 and restructured in Wyoming in 2019, Stavatti Aerospace operates prototype and production facilities at Niagara Falls International Airport and maintains a diverse portfolio spanning civil and military platforms, including AWACS, light fighters, close-support aircraft, and air superiority fighters.
