What Happened To Sukhoi SU-47?

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The Su-47 was supposed to be able to evade radar. Is the Su-47 stealthy? Air combat experts don’t agree. It probably had some stealth coatings for radar evasion characteristics, but it was certainly not completely stealthy.

What You Need to Know: The Su-47 Golden Eagle was Russia's ambitious attempt to create a fifth-generation fighter jet to rival the U.S. F-22 Raptor. Developed in the 1980s, the Su-47 featured a striking design with forward-swept wings and movable canards, aiming for exceptional maneuverability and stealth capabilities

However, the innovative wing design led to structural instability and excessive stress on the airframe, causing safety concerns and high maintenance costs. Additionally, the collapse of the Soviet Union and lack of funding hindered further development.

-Only one technology demonstrator was built, and the program was eventually canceled. The Su-47 remains a cautionary tale of experimental aircraft that never reached operational status.

The Rise and Fall of the Su-47 Golden Eagle: A Forward-Swept Dream

Airplanes fail to make it to production for a number of reasons. Sometimes it is because of design flaws. Other times it is a lack of funding. It may be insufficient research and development. Or the main idea for the airplane is just wrong. For Russia and its Su-47 Golden Eagle it was all of the above

Su-47: A Short History
The Su-47 program went badly, but it was not for a lack of trying by the Russians.

Moscow had big plans for the Sukhoi Su-47 throughout the 1980s (when it was first known as the Su-37). It was supposed to become a 5th-generation fighter to challenge the American F-22. The plan was to make it stealthy and highly maneuverable in a dog fight.

Also, the Russians thought that it could take off and land with shorter runways, which would prove valuable when deployed on an aircraft carrier.

Forward-Swept Wings Were a Gamble that Russian Designers Lost
The first glaring aspect of the Su-47 is its forward-swept inverted wings. This was something new that proved to be a problem. It also had moveable canards, a second set of small wings next to the cockpit to improve maneuverability and lift.

Therefore, the forward-swept wings, canards, and horizontal tail-stabilizers gave it a unique design with high angles of attack and longer range.

But the Wings Were Not Without Problems
Forward-swept wings have their downsides. They can be unstable. The wings are exposed to heavy stress, particularly at fast speeds. During this kind of pressure, the wings should bend without breaking, a characteristic that proved difficult if not dangerous. Forward swept wings can also lead to unrecoverable stalls.

Forward-swept wings also require extremely sturdy materials to endure the twisting pressure applied on the wing roots. The added weight of the reinforcements turned out to be a problem too difficult for the airplane’s developers to solve.

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