The Su-57 tests its final engines
Moscow, Russia has begun testing its new fifth-generation Sukhoi su-57 "PAK-FA" fighter (ex-T-50) with its new generation Saturn izdeliye 30 engines. The flight tests with the new engines will last several years. In the meantime, the Russians will build a dozen Su-57s equipped with Saturn AL-41F1 afterburner turbofan engines producing thrust of 32'500 pounds each for operational testing.
Little information has been gleaned regarding the Saturn izdeliye 30 engines, but the new powertrain is expected to deliver 24,054 lb. dry thrust and 39,566 lb. afterburner thrust. According to a Russian spokesperson, these engines will be operational by 2025. The Russian Air Force could buy up to 160 Su-57 combat aircraft, equipped with these new engines.
Looking forward to the new engine:
Moscow has so far placed an initial order of 12 Su-57 aircraft, which will be delivered in 2019. It seems that the Russians are reluctant to buy the initial version of the Su-57 currently powered by turbojet engines. Hybrid Saturn AL-41F1 producing thrust of 32 500 pounds each. It's the same engine as the existing Su-35S "Flanker-E".
Indeed, with the exception of stealth, the Su-35 offers many of the same capabilities as the new fifth-generation fighter. Thus, the Russians are not willing to spend money in a system that offers only a marginal increase in performance in their opinion. For Russians, the real novelty will come from new engines, as well as an improved electronic architecture from 2025.
New armaments:
The aircraft manufacturer Sukhoi is working with several Russian arms companies to adapt 12 types of missiles for the aircraft. Over the next year, six of them will be able to complete the qualifying trials on the Su-57 and the other six by 2020. These include the new RVV-MD air-to-air missile for close combat and RVV-SD for engagements beyond visual range. Compared to the previous generation models, they are equipped with new guidance systems with greater sensitivity and resistance to jamming. The RVV-MD uses a new dual-band infrared sensor with multi-element photo receiver and digital signal processing. These innovations will double the target's acquisition distance from the previous generation of the Vympel R-73E, while expanding the search angles of the missile by 30%. The RVV-SD, which is a new evolution of the RVV-AE in service. It offers improved aerodynamics, a higher power transmitter and a more sensitive radar guide head than its predecessor. The missile software has been completely reworked to allow a 35% increase in the maximum range of fire and maneuvering capabilities with load factor under 12g.
The air-to-ground weapons planned for the Su-57 include the Kh-38ME missile line of modular designs that allow the use of different guidance systems and warheads. The Kh-38MLE version comes with laser guidance. The Kh-38MTE with a thermal imager and the Kh-38MAE with an active radar. It is also planned to integrate the Kh-38MKE with satellite guidance.
In terms of bombs, the Su-57 will be able to carry the guided bomb KAB-500SE, which has been tested in Syria, ain1 Su-57 @ if the KAB-250LG-E of 250kg, lighter.