FSX Sukhoi Su-27

This freeware Sukhoi Su-27 addon, created by Andreas Meyer (AFS-design), provides a detailed and faithfully modeled Mach 2-class jet fighter for use in Microsoft Flight Simulator X. It showcases the characteristic Soviet-era air superiority architecture, advanced aerodynamics, and high-performance turbofan engines that made the Su-27 such an iconic aircraft, all wrapped in a visually appealing package. Although this release is a demo version, it includes numerous immersive features, a fully animated virtual cockpit, and diverse liveries.

Prominent Fighter from the Soviet Design Bureau

The Sukhoi Su-27 traces its origins to the Sukhoi Design Bureau in the former Soviet Union. Intended primarily for long-range air defense, it can climb at impressive rates, sustain high angles of attack, and execute maneuvers such as the famous Pugachev’s Cobra. Its basic airframe draws from the same design philosophy as the MiG-29, though the Su-27 is significantly larger and integrates a robust structure comprising approximately 30% titanium. Remarkably, no composite materials were used in its construction, and its delta-like wings with cropped tips support missile rails or ECM pods, enhancing its overall combat effectiveness.

Structural Design and Aerodynamic Efficiency

Wing Profile and Control Surfaces

The swept-back wings merge cleanly into the fuselage at the front edge extensions, producing a large lifting surface area for enhanced maneuverability. Although the main configuration resembles a delta, the layout retains standard tailplanes and two vertical fins. Two ventral fins can also fold down mid-flight for extra lateral stability. The wide engine spacing is a signature characteristic, allowing uninterrupted airflow to the intakes and making room for a unique central lifting surface that supplements overall performance.

Engines and Thrust

Powering the Su-27, the twin Lyulka AL-31F turbofan engines can thrust the aircraft to speeds beyond Mach 2. Movable guide vanes in the air inlets facilitate stable airflow management at high angles of attack, while mesh screens help shield the engines from ingestion of debris during takeoff. These features collectively deliver reliable performance in multiple mission profiles.

Cutting-Edge Control and Avionics

Fly-by-Wire Agility

The Su-27 integrates a cutting-edge fly-by-wire system—one of the earliest operational implementations in the Soviet fleet. Complemented by a low wing loading, the robust controls enable remarkable agility, particularly in low-speed, high angle-of-attack scenarios. Demonstrations of these capabilities include executing the “Cobra” maneuver, where the jet momentarily sustains level flight at an extreme pitch angle.

Long-Range Capability and Weapon Systems

Designed to support a substantial internal fuel load, the Su-27 can travel extended distances before refueling. It typically carries a powerful 30 mm GSh-30-1 cannon in the starboard wingroot and offers ten hardpoints for various air-to-air missiles, including the R-73 and R-27 series. Certain advanced derivatives, such as the Su-30 and Su-35, can also interface with the R-77 missile. The high-contrast heads-up display (HUD) and helmet-mounted sight further enhance close-quarters engagement capabilities.

Sensors and Targeting

An OLS-27 infrared search-and-track (IRST) system, positioned directly in front of the cockpit, provides stealthy engagement with infrared-guided missiles and integrates a laser rangefinder for additional precision. The radar, while complex to develop, enables excellent multi-target tracking in operational scenarios, ensuring the aircraft remains formidable in air-to-air combat.

Key Technical Data

Manufacturer: Sukhoi Design Bureau
Crew: Single-seat (some variants with two seats)
Length: 21.9 m
Wingspan: 14.7 m
Height: 5.92 m
Wing Area: 62 m²
Empty Weight: 16,380 kg
Max Takeoff Weight: 30,450 kg
Engines: 2 × Saturn/Lyulka AL-31F turbofans
Maximum Speed: Mach 2.35
Service Ceiling: 18,500 m
Thrust-to-Weight Ratio: 1.09

Features of This Su-27 Freeware Addon

Andreas Meyer’s Su-27 offers a standout visual model, accurate flight performance, and immersive cockpit systems within Microsoft Flight Simulator X. Notable highlights include:

• Both single and two-seat variants, plus four-ship formation models
• High-definition exterior textures with reflective surfaces
• Fully animated virtual cockpit and detailed interior instrumentation
• Multiple animations (canopy, landing gear with spring dynamics, airbrakes, spoilers, etc.)
• Complete autopilot functionality with radio navigation features
• Afterburner effects and thrust reverser animations
• Formation flight model simulating four Su-27 fighters
• Over 45 liveries (including those from China, India, Russia, Poland, Kazakhstan, Eritrea, Ethiopia)
• Repaint texture source for custom repaints

Essential Installation Steps

1. Extract all contents of this package to a temporary folder.
2. Run “Su27_demo.exe” and follow the instructions that appear on-screen.

Important Configuration Advice

• This add-on works with DirectX 9; confirm DirectX 10 Preview is disabled in your simulator’s settings.
• Launch Microsoft Flight Simulator X, choose the Su-27, then start the session.
• Access the simulation menu by