LYCOS RETRIEVER 
Su: Su-27
built 242 days ago
The radome on the Su-35 differs from the basic hinged radome of the Su-27. It is slightly more evenly curved and the radar package is accessed by removing the entire nose section. There is a fairly sophisticated multi-lens MAK electro-optical warning sensor mounted in a dome shape on top of the Su-35 fuselage which is integrated with the SPO-15 Radar Warning Receiver (RWR) system, similar to the one found on the Su-24 Fencer. One of the key characteristics of that system is that it can tell if the threat is above or below you. Other advanced variants of the Su-27 have a "dome" on top of the fuselage which is the size of a basketball. This is for the Russian version of GPS.
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The Su-27SK is powered by two AL-31F turbofan engines, designed by the Lyulka Engine Design Bureau (NPO Saturn). Each engine has two air intakes: a primary wedge intake and a louvred auxiliary air intake.
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The first photos taken at Zhukovsky of a Su-27 variant configured with a thrust vectoring system was by Wojtek Matusiak. His work appeared in Jane's (27Feb93, pg20) and showed a dual-seat Flanker with a large variable nozzle system fitted to the left engine while the right engine nozzle area remained unchanged. Siminov announced as far back as the Farnborough '92 air show that the vectored nozzle research would be part of the ongoing Su-27/Su-35 development program.
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KnAAPO started development of an upgrade programme for the single-seat Su-27SK in 1995, then designated Su-27SMK. The upgrade would improve range and combat effectiveness by making it multi-role. The first phase of this upgrade resulted in the Su-30KI single-seat tactical fighter in 1998. Based on the Su-27SK, it was fitted with IFR probe, satnav receiver, ILS/VOR navigation and landing systems, RVV-AE missile capability. The next phase implements new advanced avionics, computers, phased array and weapons.
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The latest version is the Su-27SM, an upgrade for the Russian Air Force which has strengthened fuselage for extra weapons payload, improved N001 radar, glass cockpit with three-colour multi-function displays and improved avionics. The first was delivered in December 2003.
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Su-27