Igor Sikorsky and the four-engine giant that nobody believed could fly on May thirteenth, nineteen thirteen

On May 13, 1913, twenty-three-year-old Russian engineer Igor Ivanovich Sikorsky flew the first four-engine airplane in history, a feat that every credible aerodynamicist of the era had declared physically impossible. The flight of Le Grand from a grass field outside Saint Petersburg, Russia, launched the era of multi-engine aviation and set the stage for every heavy aircraft that followed.

Why Did Experts Say Four Engines Were Impossible?

In 1913, powered flight was barely a decade old. Most airplanes were built from bamboo, fabric, and piano wire, powered by a single engine producing 50–60 horsepower that frequently quit mid-flight. The longest flights were still measured in minutes.

The prevailing aerodynamic theory held that if one engine failed on a multi-engine aircraft, asymmetric thrust would instantly throw the airplane into an uncontrollable spin. Respected engineers published formal papers supporting this conclusion. One prominent French engineer described a four-engine airplane as “not merely impractical but aerodynamically suicidal.”

Against this backdrop, Sikorsky—a young man from Kiev who had already built and crashed several helicopters and small airplanes—announced plans for a four-engine aircraft with an enclosed cabin, a lavatory, and electric lights.

Who Backed Sikorsky When No One Else Would?

Sikorsky found a critical patron in Mikhail Vladimirovich Shidlovsky, chairman of the Russo-Baltic Wagon Company, a railroad car manufacturer. Shidlovsky saw potential the academics dismissed. He provided funding, workshop space, and complete creative freedom, telling Sikorsky to build whatever he believed would fly.

Construction began in the winter of 1912 in an unheated workshop in Saint Petersburg.

What Was Le Grand?

The aircraft Sikorsky built was enormous by any standard of its time. Le Grand had a 92-foot wingspan—wider than a modern Boeing 737. Its fully enclosed fuselage cabin contained wicker chairs, a small table, and a door. Passengers could stand upright inside. Fully loaded, the aircraft weighed approximately 9,200 pounds.

Four Argus inline engines, each producing about 100 horsepower, were mounted on the lower wing for a total of 400 horsepower. Sikorsky’s engineering breakthrough was not simply scaling up—he directly addressed the asymmetric thrust problem that terrified everyone else. He positioned the engines carefully along the wing and designed control surfaces with enough authority to maintain controlled flight even with an engine out. He didn’t hope it would work. He calculated it.

What Happened on May 13, 1913?

Sikorsky and a small crew boarded Le Grand. The four Argus engines started one after another, and the big machine rolled across the grass, accelerated, and lifted off.

It climbed to approximately 600 feet and made several circuits of the airfield. Then Sikorsky deliberately shut down one outboard engine in flight. The airplane continued flying. He shut down the other outboard engine. It kept flying on two engines. He restarted them, landed safely, and proved every critic wrong in a single afternoon.

How Did the Ilya Muromets Push Even Further?

Within months, Sikorsky built a refined successor: the Ilya Muromets, named after a legendary Russian warrior knight. It was the first true heavy aircraft in history and featured cabin heating (accomplished by routing exhaust gases through pipes), large windows, and a promenade deck on top of the fuselage where passengers could walk outside in flight at 2,000 feet.

In February 1914, Sikorsky demonstrated the Ilya Muromets by carrying 16 passengers and a dog—barely a decade after the Wright Brothers flew a single person for 12 seconds at Kitty Hawk.

What Role Did the Ilya Muromets Play in World War I?

When war broke out, the Ilya Muromets became the world’s first purpose-built strategic bomber. Russia built approximately 80 aircraft during the war, flying over 400 bombing missions on the Eastern Front.

The aircraft cruised at roughly 70 knots and carried up to 1,100 pounds of bombs. What it lacked in speed it made up for in durability. One Ilya Muromets sustained hits that shattered the fuselage, shredded the wings, and killed crew members—and still made it home. Only one was ever confirmed shot down by enemy fire during the entire war, and its crew destroyed three German fighters before going down.

What Happened to Sikorsky After the Russian Revolution?

The revolution cost Sikorsky everything—his country, his factory, his aircraft, and his reputation. He emigrated to the United States in 1919 with almost nothing, arriving in New York with limited English, a few dollars, and his engineering drawings.

He survived by teaching mathematics to fellow Russian immigrants and sleeping on friends’ couches. Eventually, he founded the Sikorsky Aero Engineering Corporation on a chicken farm on Long Island, staffed by Russian immigrants who worked for nearly nothing out of shared belief. The composer Sergei Rachmaninoff invested in the company—not because he understood airplanes, but because he understood genius.

Sikorsky went on to build the Pan American flying boats—the S-40 and S-42 Clippers—that opened transatlantic and transpacific air travel. In 1939, he returned to his first love and built the VS-300, the first practical helicopter. The name Sikorsky became synonymous with rotary-wing flight.

Key Takeaways

May 13, 1913: Igor Sikorsky flew Le Grand, the world’s first four-engine airplane, from a field outside Saint Petersburg, directly disproving the scientific consensus that multi-engine flight was impossible.
Sikorsky solved the asymmetric thrust problem through careful engine placement and control surface design—engineering his way past a theoretical objection.
The refined Ilya Muromets became both the first heavy passenger aircraft and the first strategic bomber, with a remarkable combat survival record in World War I.
After losing everything in the Russian Revolution, Sikorsky rebuilt from nothing in America, eventually creating the Pan American Clippers and the first practical helicopter.
Every four-engine airliner, every 747, every C-130, every B-52 traces its lineage back to that spring morning when a 23-year-old engineer opened four throttles and proved that calculation could beat consensus.