Sukhoi Su-57 the Su-27. Extendible refueling probe is available to further increase its range. 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. The Su-57 will be the first operational aircraft in Russian Air Force service to use stealth technology. Similar to other stealth fighters such as the F-22, the airframe incorporates planform edge alignment to reduce its radar cross-section (RCS); the leading
Sukhoi Su-30MKK Russia's inventory, developed by Tikhomirov, was offered to China. However, it is highly unlikely that China will adopt this newest Russian airborne radar because all models of the Su-30 series can only provide half of the power required for the 5 kW rated radar, and currently, only Sukhoi Su-35 and Sukhoi Su-37 have enough power to support this newest Russian airborne radar. Purchasing Irbis-E phased array radar would lock China into yet another deal with Russia to upgrade its Su-30MKK fleet that would greatly increase the cost, because China currently lacks the ability to do so by itself, or is