The Northrop N-9M Flying Wing, Jack Northrop's Broken Dream, and the One Survivor at Chino That Proved He Was Right All Along

The Northrop N-9M Flying Wing is a one-third-scale testbed that helped prove one of aviation’s most radical ideas was aerodynamically sound. Built in 1942 to validate the design principles behind the massive XB-35 bomber, it flew without a fuselage, without a tail, and without most of what most pilots assume an airplane requires. The single surviving example - the N-9MB - still flies today at the Planes of Fame Air Museum in Chino, California.

What Was Jack Northrop Trying to Build?

John Knudsen “Jack” Northrop was an aeronautical engineer who came up through the industry in the 1920s, working at Lockheed during an era when the science of flight was still being written by people willing to break things to understand them. He was methodical and quiet. But he held one idea with uncommon tenacity across his entire career: the flying wing.

The logic is almost disarmingly simple. A conventional airplane hauls significant dead weight. The fuselage is a structural tube - it generates drag, carries passengers, and connects wing to tail. The tail surfaces add more wetted area, more weight, more drag, all in service of controlling an aircraft that Northrop believed could be controlled more efficiently from the wing itself. His question, repeated throughout his career, was always the same: what if you got rid of all of it?

The efficiency case was compelling. A pure flying wing bomber could achieve extraordinary range - theoretically enough to fly from bases in the American heartland to targets deep in Europe or Japan and return without landing, without forward bases, without a supply chain stretching across an ocean. Take off from Nebraska. Do the job. Come home.

How the N-9M Came to Be

By 1942, Northrop had convinced the Army Air Forces the concept was worth serious development. The contract was for the XB-35, a large strategic flying wing bomber to be built at Northrop Aircraft in Hawthorne, California. But a 60,000-pound flying wing bomber is not built by starting with a 60,000-pound flying wing bomber.

Northrop built four scale aircraft first: the N-9M series. One-third scale, fully flyable testbeds designed to prove the aerodynamics in practice rather than just on paper. Each had a 60-foot wingspan, two piston engines buried in the trailing edge with propellers just behind the wing’s thickest section, and a cockpit barely large enough for one pilot under a bubble canopy that barely cleared the wing surface below it.

The first - the N-9MA - lifted off from Muroc Dry Lake in December 1942. That same Mojave hardpan where Chuck Yeager would break the sound barrier five years later, and which the Air Force would eventually rename Edwards. It flew. Not gracefully, not immediately. But it flew.

Flying Without a Tail: What the Test Pilots Learned

A tailless aircraft behaves differently from anything a pilot trained on conventional equipment expects. There is no horizontal stabilizer to damp pitch oscillations. No elevator in the conventional sense. The N-9M used elevons - control surfaces along the trailing edge functioning simultaneously as elevator and aileron - responding to inputs in ways that required pilots to rewire instincts built over years of conventional flying. The aircraft was direct and immediate. It was not forgiving of ham-fisted handling.

The Northrop test pilots who flew the program were exceptional. They had to be.

In May 1943, the N-9MA was lost in a crash that killed test pilot Max Constant. The loss hit the program hard. But the data from earlier flights had already confirmed the essential point: the wing was stable, controllable, and capable of carrying a pilot safely through normal maneuvering flight.

The N-9MB, the second aircraft, continued accumulating flight data through the war years - stability and control measurements, handling quality evaluations at varying centers of gravity. The unglamorous, essential work that rarely makes history books but without which the history never gets made.

The XB-35 and YB-49: Promise and Collapse

The XB-35 flew for the first time in June 1946. Its specifications were imposing: a 172-foot wingspan, eight propellers in counter-rotating pairs at four engine positions, driven by Pratt and Whitney Wasp Major radials. On its first flight it handled well, and there were people in Hawthorne who went home convinced America was about to possess the greatest long-range bomber in the history of airpower.

Then the engineering caught up with the optimism.

The counter-rotating gearboxes - intricate mechanical systems spinning four pairs of propellers in opposite directions from single engines - were extraordinarily complex and chronically unreliable. The XB-35 was grounded repeatedly. Meanwhile, jet engines were demonstrating performance that made even the most capable piston bombers look like yesterday’s answer.

The Air Force directed Northrop to re-engine two XB-35 airframes with Allison turbojet engines - eight jets per aircraft, four buried into each wing half. The redesignated aircraft was the YB-49.

The YB-49 flew in October 1947 and it was fast: 530 miles per hour at altitude. Clean, quiet by warbird standards, almost eerie given its size and shape. There were people in Washington who took it seriously. There were moments in Hawthorne where the team believed they had actually done it.

The Accident and the Political Kill

In June 1948, a YB-49 came apart in flight over the Mojave. The five-man crew was killed, among them Air Force Captain Glen Edwards - a test pilot described by those who worked with him as possessing extraordinary skill and judgment. Muroc Army Air Field was renamed Edwards Air Force Base in his honor the following year, and it carries his name today.

The accident raised serious questions about the aircraft’s stability in certain flight conditions. Programs can survive accidents - the B-29 Superfortress had a brutal development history and still went on to end a war. What the YB-49 could not survive was what happened next in Washington.

Secretary of the Air Force Stuart Symington summoned Jack Northrop to a meeting. According to Northrop’s own sealed Congressional testimony - opened after his death - the message was direct: merge Northrop Aircraft with Convair, or lose the flying wing contract. Jack Northrop refused.

The YB-49 contract was cancelled. The Air Force chose Convair’s B-36 Peacemaker instead. Most of the XB-35 and YB-49 airframes were cut up for scrap. A decade of work was gone within months. Whether the cancellation was genuinely punitive - whether Symington was acting in service of political interests that benefited from Northrop’s failure - no court ever definitively established the full truth of it.

Jack Northrop left Northrop Aircraft in 1952 - the company he had built. He spent the following decades watching other men fly other aircraft to do the jobs he believed his design could have done with greater range and better efficiency. He suffered a debilitating stroke in 1978, leaving him wheelchair-bound and largely unable to speak clearly.

The Moment That Resolved Everything

In late 1980, executives from what had become Northrop Corporation brought Jack - then 85 years old - into a secure facility. The company was competing for a classified Air Force program for an advanced technology bomber. What they were developing was, at its core, exactly what Jack Northrop had spent sixty years trying to build. A pure flying wing.

The accounts from people in that room describe a man who wept. Who communicated through expression and gesture and whatever words he could still find that something had resolved for him. That the political interference, the cancelled contracts, the decades of watching the work go elsewhere - all of it had led here, to this design, to this moment. That it had been worth it.

John Knudsen Northrop died on February 18, 1981 - three months after seeing that drawing. He never saw the aircraft fly. But he knew it was real. He knew the idea had survived him.

The aircraft he was shown entered service as the Northrop B-2 Spirit - the stealth flying wing bomber. Twenty B-2s serve in the United States Air Force today, operating from Whiteman Air Force Base in Missouri, capable of striking any target on the planet and returning home. The flying wing a Secretary of the Air Force tried to kill became the most capable stealth bomber on earth.

The One Survivor at Chino

The N-9MB - the second of those four scale testbeds - spent decades sitting in storage at Northrop’s facility after the program ended. Not deliberately preserved. Just sitting, the way things sit in a warehouse when no one has quite decided what they are worth.

The Planes of Fame Air Museum in Chino, California took it on. What distinguishes Planes of Fame from many museum programs is that its aircraft fly. Airworthiness is the mission, not just the aspiration.

The restoration was a long and patient project. There were no spare parts in any catalog. Documentation was fragmentary. The team functioned as historians as much as mechanics - tracking down original engineering drawings, interviewing people who had worked on the program fifty years before, reverse-engineering systems from photographs and physical evidence.

The N-9MB flew again in the mid-1990s - restored, airworthy, painted in the yellow and olive drab of wartime Northrop test aircraft. Two Franklin engines. Elevons on the trailing edge. That small canopy barely breaking the wing’s flat profile. Sixty feet of pure wing, looking exactly as strange and exactly as right as it did when test pilots were flying it over the Mojave, sending data back to Hawthorne about an idea that was ahead of its time and never stopped being ahead of its time.

It still flies at Planes of Fame airshows. When it rolls to the runway, the ramp gets quiet in a way that most airshow aircraft don’t manage. Because there is something in that shape that speaks to more than a type designation. It speaks to what it means to be right when the world is not ready for you.

Key Takeaways

Jack Northrop’s flying wing concept eliminated the fuselage and tail, reducing drag and weight while dramatically extending range - and he pursued it from the 1920s through his death in 1981.
The N-9M series (four aircraft, beginning December 1942) were one-third-scale testbeds that proved the flying wing was aerodynamically viable under real flight conditions, at the cost of at least one pilot’s life.
The YB-49 was cancelled following the June 1948 crash, under circumstances Jack Northrop attributed in sealed Congressional testimony to political coercion; most airframes were scrapped, and he left his own company in 1952.
In late 1980, a wheelchair-bound, 85-year-old Jack Northrop was shown early designs for what would become the B-2 Spirit - and died three months later on February 18, 1981, knowing his idea had survived him.
The N-9MB - the only surviving N-9M - was restored by Planes of Fame in Chino, California, and still flies at airshows today, representing both the beginning and the vindication of the flying wing story.