hello MFS well sorry for not uploading for two days but i got bored and then i build the su-27 anyways heres some history about this shit:

Sukhoi Su-27 “Flanker” – History and Development

1. Origins: The Need for a Counter

In the early 1970s, the Soviet Union realized that new American fighters like the F-15 Eagle and F-14 Tomcat had created a major challenge in air superiority. The Soviet Air Force (VVS) needed a fighter that could match or surpass Western 4th-generation jets in speed, range, and agility.

In 1971, the Soviet government issued a requirement for a new long-range, heavy air-superiority fighter — the program that would become the Su-27 (and its lighter companion, the MiG-29).

The design competition was between two leading Soviet aircraft bureaus:
• Sukhoi Design Bureau (OKB Sukhoi)
• Mikoyan-Gurevich (MiG)

MiG developed the MiG-29 “Fulcrum” for shorter-range missions, while Sukhoi focused on the heavy, long-range platform — the T-10, which would evolve into the Su-27.

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1. Development and Early Prototypes

The first prototype, designated T-10, flew on May 20, 1977.
However, early test flights showed severe aerodynamic instability and control issues. Sukhoi engineers, led by Mikhail Simonov, completely redesigned the aircraft.

The revised design, called T-10S, introduced:
• A new airframe layout with refined aerodynamics
• A more powerful Lyulka AL-31F turbofan engine
• A new fly-by-wire (FBW) control system for high-agility flight

After years of trials and redesign, the final prototype flew successfully in April 1981, paving the way for production.

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1. Entry into Service

The Su-27 entered Soviet Air Force service in 1985, and NATO assigned it the reporting name “Flanker-B.”

It was designed to:
• Establish air superiority over long ranges
• Escort bombers and protect Soviet airspace
• Engage U.S. aircraft like the F-15 and F-16

The Su-27 was built for range and endurance — it could fly more than 3,500 km (2,200 mi) without refueling, and even more with aerial refueling.

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1. Design Features

The Su-27’s design emphasized maneuverability and power, with:
• Twin engines (AL-31F) delivering massive thrust
• Blended wing-fuselage design for lift and agility
• Advanced FBW system allowing controlled high-angle-of-attack (AoA) maneuvers
• Helmet-mounted sight and R-73 (AA-11 Archer) missiles — years ahead of Western equivalents

It quickly became famous for its cobra maneuver (Pugachev’s Cobra), demonstrating extreme pitch control and post-stall stability — a move no Western fighter could safely replicate at the time.

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1. Operational Use and Variants

The Su-27 became the basis for a family of aircraft still in service today: