Jack Northrop, the YB forty-nine Flying Wing, and the Buried Aircraft That the B two Spirit Finally Vindicated

Jack Northrop spent his career proving that an airplane built entirely of wing - no fuselage, no tail - was the most efficient flying machine possible. The YB-49 flying wing first flew on October 21, 1947, demonstrating exceptional range and speed before being cancelled and physically destroyed on Air Force orders. Forty years later, the B-2 Spirit stealth bomber flew with the same 172-foot wingspan, vindicating every calculation Northrop had made.

Who Was Jack Northrop?

Northrop founded Northrop Corporation in 1939 in Hawthorne, California, following a career that included an early stint at Lockheed, where he helped design the Vega - the monoplane Amelia Earhart flew solo across the Atlantic. He understood aerodynamics at an almost instinctive level, and the concept he kept returning to was the pure wing.

His reasoning was direct. A conventional aircraft drags a tube full of air through the sky, paying an aerodynamic penalty for every inch of fuselage and tail structure. A flying wing eliminates that parasitic drag entirely: every square inch of the structure generates lift. The physics demanded it.

What Was the YB-49 Flying Wing?

Northrop’s path to the YB-49 ran through two earlier prototypes. The N-1M, a small piston-powered design, proved the flying wing concept could fly. The N-9M, a one-third scale aircraft, tested aerodynamics for a larger machine the Army had commissioned: the XB-35.

The XB-35 was a massive propeller-driven flying wing bomber with a 172-foot wingspan and eight pusher propellers, first flying in June 1946. Its contra-rotating propeller gearboxes were mechanically unreliable and caused constant trouble. The solution was jets. Engineers replaced the piston engines with eight Allison J-35 turbojets embedded in the wing, producing the YB-49.

Northrop test pilot Max Stanley flew the YB-49 for the first time on October 21, 1947, at Muroc Army Air Field in the California high desert. Test pilots described the aircraft as honest - demanding, but honest. She tended to porpoise, pitching in a rhythm that required constant attention because there was no horizontal tail to automatically damp the oscillation. Pilots who understood her flew her well.

In April 1948, she made a low pass down Wilshire Boulevard in Los Angeles. People stopped their cars. Nobody had seen anything like it.

The Crash That Reshaped the Program

In June 1948, one of the two YB-49 prototypes went down near Muroc during a high-speed test. Captain Glen Edwards was at the controls. Major Daniel Forbes occupied the right seat. Three other crew members were aboard. All five were killed. Investigation pointed toward structural failure or loss of control at speed - the same pitch instability pilots had learned to manage may have overwhelmed the crew in a high-speed maneuver.

Muroc Army Air Field was renamed Edwards Air Force Base in honor of Captain Glen Edwards. Every test pilot who has trained there since, every aviation milestone achieved on that lakebed, carries his name. He died in a Northrop YB-49.

Why Was the Flying Wing Cancelled?

The Air Force already had the Convair B-36 - a massive conventional bomber already flying, already in production, with powerful allies in the procurement offices. Where the YB-49 was radical, the B-36 was proven. Performance concerns about the flying wing were real: bombing accuracy tests were mixed, and the aircraft was genuinely more demanding to fly precisely than a conventional design.

But Jack Northrop later testified to Congress that Air Force Secretary Stuart Symington had privately demanded that Northrop Aircraft merge with Convair as a condition of keeping the flying wing contract. Northrop refused. He was not going to hand over the company he had built - and the dream behind it - for the sake of a government contract.

Symington denied the story. The truth of it probably died with both men. What followed is not disputed.

The Destruction of the Flying Wings

In early 1949, the Air Force announced plans to put the flying wing into production. Approximately 60 days later, the contract was cancelled. The Air Force then ordered the remaining airframes destroyed - not mothballed, not transferred to a museum, not preserved as test articles. Bulldozed on the ramp at Hawthorne and at Muroc. Aluminum, instrumentation, and two decades of flight test data were pushed into holes in the California desert.

Jack Northrop watched his life’s work get buried. He continued building aircraft - the Northrop F-89 Scorpion became an important interceptor in the air defense mission - but the flying wing was gone.

Jack Northrop’s Final Vindication

By 1980, Northrop was 85 years old. He had suffered a serious stroke and communicated primarily through written notes. Northrop Corporation had been working under extraordinary government secrecy on a new design: a low-observable, long-range strategic bomber. A flying wing.

Someone at the Air Force decided Jack Northrop should see it.

They brought him in and showed him the shape of what was coming - the great bat-wing design that would become the B-2 Spirit stealth bomber. Then they showed him the wingspan.

One hundred seventy-two feet.

The same as the XB-35. The same as the YB-49. The aerodynamics had pointed to that number in 1946. Thirty-four years later, the physics had not changed, because physics does not negotiate with procurement decisions.

Northrop wept. He wrote a note to the engineers present: “Now I know why God has kept me alive for the last twenty-five years.”

Jack Northrop died on February 18, 1981. The B-2 Spirit flew for the first time on July 17, 1989. She continues to fly from Whiteman Air Force Base, Missouri - a flying wing, exactly as Northrop drew it.

Why the Flying Wing Had to Wait

The YB-49’s greatest engineering challenges - pitch instability that killed five men and made precision bombing difficult - were not unsolvable. They required solutions that did not yet exist in 1949.

Fly-by-wire flight control computers manage pitch instability faster than any human pilot. Stealth materials science made the flying wing not just efficient but strategically essential. Software sophisticated enough to keep a tailless aircraft precisely on course was decades away. The technology had to catch up with the vision. Eventually, it always does.

The B-2 is not a tribute to Northrop’s work. It is the same aircraft, built with tools he never had.

Key Takeaways

Jack Northrop founded his company in 1939 and spent decades advancing flying wing designs, arguing that eliminating fuselage and tail drag would produce a fundamentally superior aircraft.
The YB-49, powered by eight Allison J-35 turbojets, first flew on October 21, 1947, demonstrating impressive speed and range but requiring constant attention to manage pitch instability.
A June 1948 crash killed five crew members including Captain Glen Edwards, for whom Edwards Air Force Base is named; the contract was cancelled roughly a year later.
The Air Force ordered surviving flying wing airframes bulldozed at Hawthorne and Muroc; Northrop testified before Congress that a forced merger with Convair was the real condition for keeping the program alive.
In 1980, Northrop was shown early designs for the B-2 Spirit, which shares the YB-49’s 172-foot wingspan; he died February 18, 1981, eight years before the B-2’s first flight on July 17, 1989.