Sukhoi Superjet 100 increase the cabin density from 93 to 108 seats by reducing the pitch from . Interjet claims its capital cost for 10 Superjets is equivalent to the pre-delivery payment for one Airbus A320. The pre-delivery payment amounts to 15-30% of an aircraft list price. An A320 list price was $88.3M in 2012. By then, Brussels Airlines was seeking alternatives for its four SSJ100s wet-leased from CityJet until March 2019, as teething problems affected their reliability. In October 2018, Sukhoi and engine contractor UEC agreed a plan, backed by the Russian government, to focus on customer support rather than deliveries in
Sukhoi-Gulfstream S-21 Sukhoi-Gulfstream S-21 Sukhoi-Gulfstream S-21 was a projected Russian-American supersonic business jet. In the early 1990s, Gulfstream Aerospace and the Sukhoi Design Bureau began a joint effort to develop a supersonic small business jet, code named the S-21. Due to questionable market demand for commercial supersonic air travel, commitment to the project weakened and delays mounted. Gulfstream eventually dissolved the partnership, although Sukhoi continued work on the S-21. The S-21 would be capable of sustained cruise at Mach 2+ and much research and development has gone into the management of the troublesome transonic effects phenomena associated with near Mach 1 air