 In 2010, Sukhoi developed an updated version of the Su-33; flight trials began in October 2010. This modernised Su-33 was to compete with a potential Chinese indigenous version of the original Su-33, and to encourage orders from the Russian Navy. Major upgrades to the aircraft included more powerful (132 kN, 29,800 lbf) AL-31-F-M1 engines and a larger weapons carriage; upgrades to the radar and weapons were not possible at the time due to funding constraints. According to military author Richard Fisher, it has been speculated that further modifications to a new production batch would include a phased-array radar, thrust-vectoring nozzles, and long-range anti-ship missiles.
