F-15Es are equipped with Pratt & Whitney F100-PW-229 low-bypass turbofan engines, which provide 29,000lb of thrust per engine. Using the digital electronic engine control system, the pilot can accelerate from idle power to maximum afterburner within four seconds.
The aircraft will make extensive use of composites; on the first prototype, composites comprise 25% of the structural weight and almost 70% of the outer surface.[65] Second stage prototype will increase the usage of composite material, as well as wider wingspan, stronger airframe and the possibility to install newer engines.[83][98] According to Sukhoi design engineer, Alexander Shkoda, the airframe has a good balance between durability and weight, as shown during in-house testing to test the limit of its tensile strength characteristics; the test achieved a breaking point of 104 percent of maximum design load. An excellent result will be attained if aircraft's breaking point proved to be between 99 and 104% of the maximum load calculated by engineers during design work, while a result more than 104% means that the airframe is too heavy.[99]Weapons are housed in two tandem main weapons bays between the engine nacelles and smaller bulged, triangular-section bays near the wing root.[100] Internal weapons carriage eliminates drag from external stores and enables higher performance compared to external carriage, as well as enhancing stealth. Advanced engines and aerodynamics enable the Su-57 to supercruise, sustained supersonic flight without using afterburners. Combined with a high fuel load, the fighter has a supersonic range of over 1,500 km (930 mi), more than twice that of the Su-27.[94][97][101] Extendible refueling probe is available to further increase its range.[102] In the Su-57's design, Sukhoi addressed what it considered to be the F-22's limitations, such as its inability to use thrust vectoring to induce roll and yaw moments and a lack of space for weapons bays between the engines, and complications for stall recovery if thrust vectoring fails.[103]
Maximum Thrust 2003 Movie 57
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