 Its development began in 2004 and has increased fan diameter, new high- and low-pressure turbines, provisions for thrust-vectoring nozzles similar to the AL-31FP, and a digital control system (FADEC) integrated into the aircraft's flight controls.According to Sukhoi director Mikhail Pogosyan, the AL-41F1 is a new fifth-generation engine built specifically for the Su-57.Though the specifics remain classified, the engine's thrust was increased by over the AL-31 while the engine weight growth was reduced by .