The Bell X One, Chuck Yeager, and the Orange Rocket at the Smithsonian That Most Visitors Walk Past on the Way to the Gift Shop

On October 14, 1947, Captain Charles “Chuck” Yeager became the first person to fly faster than the speed of sound, reaching Mach 1.06 at 43,000 feet over the Mojave Desert in the Bell X-1. He did it with two broken ribs, a piece of broomstick improvised as a cockpit latch, and no announcement to the public for eight months afterward.

Who Was Chuck Yeager Before the X-1?

Yeager was 24 years old on the morning of the flight. He had a West Virginia drawl and a reputation at Muroc Army Air Field as someone who didn’t rattle easily.

During World War II, he flew 64 combat missions in Europe, was shot down over occupied France, and evaded capture with the help of the French Resistance. He became a fighter ace before he was 22.

Two nights before the supersonic attempt, he fell off a horse near the base in the dark and broke two ribs on his right side. He found a flight surgeon he trusted, got taped up, and told no one else - because if the wrong person found out, the flight would go to someone else.

What Was the Bell X-1?

Built by Bell Aircraft Corporation in Buffalo, New York, under contract with the Army Air Forces, the X-1 was barely 31 feet long with a wingspan of just over 28 feet. Most people are surprised by how small it is when they finally see it in person.

The fuselage was shaped like a .50-caliber machine gun bullet - and that was the deliberate inspiration. Bell’s engineers knew a .50-caliber round was ballistically stable at supersonic speeds, so they started with what already worked.

The wings were thin, straight, and nearly flat - only 4 percent thick at the root. Engineers argued openly about whether those wings could survive the aerodynamic loads in the transonic region. The decision came down to calculations and nerve.

The X-1 was not a jet. It burned liquid oxygen (LOX) and diluted ethyl alcohol - essentially the same compound as the drinking kind, which the pilots found symbolically appropriate - through four separate rocket chambers, each producing roughly 1,500 pounds of thrust, for about 6,000 pounds total.

Why Did the X-1 Launch from a B-29?

The X-1 could not take off under its own power. A modified B-29 Superfortress carried it aloft under the bomb bay and climbed to 25,000 feet before the drop.

Before the B-29 even taxied, the crew chief would load Yeager into the X-1 on the ground. He climbed through a small access hatch, then rode inside the belly of the bomber as it climbed through the Mojave sky. After the drop, the choice was binary: light the rockets or glide - and the X-1 was a terrible glider.

What Was the Sound Barrier, Really?

In 1947, the term described a real and frightening engineering problem. As an aircraft approaches the speed of sound, shock waves build across the airframe, creating massive drag and disrupting airflow over control surfaces. Elevators, ailerons, and rudder all lose effectiveness. Some early jet aircraft that accidentally entered the transonic zone during high-speed dives had their controls lock up - or reverse.

In 1946, British test pilot Geoffrey de Havilland Jr. died when his experimental de Havilland 108 broke apart entering the transonic regime over the Thames Estuary. He was 26 years old.

Serious engineering papers argued that the shock wave buildup represented a physical limit no aircraft could punch through without destroying itself.

How Engineers Made Mach 1 Survivable

Bell’s answer was built into the horizontal stabilizer. Rather than conventional elevators at the trailing edge of a fixed stabilizer - which could lose authority in shock waves - the entire horizontal stabilizer pivoted on a hinge point. This gave the pilot direct pitch control regardless of what shock waves were doing to a trailing-edge flap.

That adjustable stabilizer was the design decision that made supersonic flight survivable. Much of the engineering work came from a young officer named Jack Ridley - the same man who was about to solve a completely different problem with a piece of a broom.

The Broomstick Fix

The X-1’s cockpit sealed via a hatch latched from the inside. To engage it, Yeager had to reach across his body with his right arm and pull a handle toward him - a motion that was excruciating with two broken ribs on his right side.

Ridley figured out a solution in about ten minutes. He cut a roughly 9-inch segment of broomstick and handed it to Yeager. Hooked through the latch handle, it gave Yeager the leverage to seal the cockpit without torquing his injured side.

The first aircraft to fly faster than sound had a piece of a broom handle in its cockpit.

The Flight Itself

On October 14, 1947, at 0530 local time, the B-29 climbed out of Muroc with the X-1 in its belly. At 25,000 feet, the drop came.

Yeager lit the first two chambers. The airplane accelerated hard through the thin desert air. He lit a third. The altimeter climbed through 30,000, 35,000, 40,000 feet. The sun was coming up to the east.

Mach 0.85. Mach 0.90. Some transonic buffeting - the kind that had sent earlier pilots reaching for the throttle. Yeager held it forward.

Mach 0.94. Mach 0.96. The buffet smoothed out. The adjustable stabilizer held the nose exactly where he wanted it. Mach 1.06. At 43,000 feet.

On the ground, observers at the telemetry station heard the sonic boom roll across the flats - a crack of thunder with no clouds and no storm in sight. The supersonic portion of the flight lasted roughly 20 seconds before the rockets burned down and Yeager glided home. He later described going supersonic as almost anticlimactic. The airplane felt fine.

Who Flew the X-1 Before Yeager?

Yeager wasn’t the first pilot in the X-1. Bell company pilot Chalmers “Slick” Goodlin had pushed the aircraft through the high transonic regime, reaching around Mach 0.85, before the program transferred to military control. When the time came to attempt supersonic flight, Goodlin and Bell requested a substantial bonus on top of his regular salary, citing the genuine hazard of the work. The Army Air Forces declined.

The assignment went to Colonel Albert Boyd at Wright Field, who chose Yeager. Supersonic flight went to a 24-year-old willing to do it for his captain’s pay.

Goodlin flew genuinely dangerous early flights before anyone knew how the airplane would behave in the regime they were pushing into. That part of the story is worth sitting with.

Why the Flight Was Kept Secret for Eight Months

The flight was classified. The Army Air Forces - which had just become the independent United States Air Force ten days before Yeager flew - made no public announcement. The world did not learn of it officially until June 1948, when Aviation Week published a report from a source inside the program.

For eight months, the people at Muroc kept a secret that should have been front-page news in every country on Earth.

The context mattered. In October 1947, the Cold War was hardening fast. The Soviet Union had not yet tested a nuclear weapon, but everyone at Muroc understood the implications. Supersonic flight was not an academic question. It was a military one.

What Came After

The X-1 flew a total of 78 times across the full program. Yeager flew it again and eventually reached Mach 1.35 in later flights. The program generated an entire lineage of X-aircraft that pushed the edges of the flight envelope across the next three decades.

Yeager went on to become a brigadier general, commanded the Fighter Weapons School, and served as test pilot school commandant. He flew combat observer roles in Korea and Vietnam. On October 14, 1987 - the 40th anniversary of the supersonic flight - he climbed into an F-15D at Edwards Air Force Base and flew the same profile. He was 64 years old.

Yeager died on December 7, 2020. He was 97.

The Bell X-1 at the Smithsonian

The Bell X-1, serial number 46-062, named Glamorous Glennis after his wife, hangs today in the Milestones of Flight gallery at the National Air and Space Museum on the National Mall in Washington, D.C. It is painted the same bright orange it wore that October morning.

The gallery puts the weight of a single century of powered flight into one room. The Wright Flyer is 16 feet long. The Spirit of St. Louis has a fuel tank where the windshield should be - Lindbergh chose fuel over forward visibility for a 33-hour ocean crossing. John Glenn’s Friendship 7 capsule still has scorch marks on its heat shield.

The X-1 hangs there, bright orange and shaped like a bullet, smaller than most visitors expect. Most of them walk past it on the way to the gift shop.

Stop under it for a moment and you are looking at a piece of aluminum that a 24-year-old with broken ribs flew into an unknown aerodynamic regime - with a piece of broomstick to close the door - on a classified mission the world wouldn’t hear about for eight months.

Key Takeaways

• On October 14, 1947, Chuck Yeager became the first person to exceed the speed of sound, reaching Mach 1.06 at 43,000 feet over Muroc Army Air Field, California.
• The X-1’s pivoting horizontal stabilizer, developed in part by engineer Jack Ridley, was the design decision that made supersonic flight survivable - conventional elevators would have lost authority in the shock waves.
• Yeager flew with two broken ribs and latched his cockpit door using a roughly 9-inch piece of broomstick cut by Ridley before the flight.
• The achievement was classified for eight months; the public first learned of it when Aviation Week published a leaked report in June 1948.
• The Bell X-1 Glamorous Glennis (serial 46-062) now hangs in the Milestones of Flight gallery at the National Air and Space Museum in Washington, D.C.