The Gee Bee Model R, the Granville Brothers' Barrel in the Sky, and the Thompson Trophy That Made Jimmy Doolittle Walk Away from Racing Forever

The Gee Bee Model R was the fastest closed-course racing airplane in America in 1932, winning the Thompson Trophy at an average speed of 252 miles per hour. Built by five brothers out of a converted dance hall in Springfield, Massachusetts, it represented the logical extreme of racing aircraft design: maximum power, minimum drag, and almost no margin for error. The man who flew it to victory walked away from racing that same evening and never went back.

Who Were the Granville Brothers?

Zantford, Thomas, Mark, Robert, and Edward Granville established the Granville Brothers Aircraft Company at Springfield Airport in Massachusetts around 1928, working out of a building that had previously served as a dance hall. Zantford - known as “Granny” - was the heart of the operation, the one with the instinct for racing geometry that others were missing.

None of the brothers held formal engineering credentials. They were builders and mechanics who learned by doing. What they learned faster than nearly anyone else in the era was how to minimize drag and maximize power. Their company name became their airplane’s name by accident: Granville Brothers Aircraft. G.B. Say it aloud. Gee Bee. By 1932, those two letters on a fuselage meant one thing in American aviation.

What Made the Thompson Trophy So Important

The National Air Races were not a regional airshow. During certain years in the early 1930s, they were the biggest sporting event in the country. The Thompson Trophy - the crown jewel - was a closed-course pylon race flown at low altitude, flat out, around a circuit. Pilots were inches above the ground on the straights and pulling hard into the turns. The Bendix Trophy was the transcontinental sprint: coast to coast, first airplane across wins.

On the best days at Cleveland Municipal Airport, attendance reached 100,000 people. The pilots were national celebrities, their names in newspapers, their faces on magazine covers. The races also drove real technology. Lessons from the Thompson Trophy and Bendix fed directly into fighter designs and engine development. The price of that acceleration was measured in pilots.

The Design Logic Behind the Gee Bee Model R

The Granvilles understood the equation. To win the Thompson Trophy, you needed the highest possible power-to-drag ratio. Everything else was negotiable - structural margins, stability, pilot visibility, ease of handling. All of it could be sacrificed for minimum frontal area and maximum horsepower.

The Gee Bee Model R was the logical extreme of that thinking. They built two versions for the 1932 season: the R-1 and the R-2. The R-1 carried a Pratt & Whitney Wasp Senior radial engine producing close to 800 horsepower. The airframe was built around that engine the way a glove is built around a hand.

The fuselage was so short and so fat that the tail moment arm - the distance between the main wing and tail surfaces - was barely adequate for the physics to work. In practice, that meant the tail surfaces had very little mechanical advantage. The airplane responded to control inputs almost instantly. Move the stick an inch when you meant half an inch, and the Gee Bee did exactly what you told it, which was not always what you wanted.

At racing speed, pilots who flew it described the R-1 as honest, even pleasant in a raw, aggressive way. The airflow was solid and controls had feel. Slow down - get into the pattern, get onto approach - and the picture changed completely. The stability margins that existed at 250 miles per hour evaporated as airspeed bled off. What remained was a highly sensitive airplane demanding total concentration and absolute precision at exactly the moment when a pilot’s workload was highest.

Lowell Bayles and the Model Z

Before the R-series, the Granvilles flew the Model Z in 1931. Their pilot was Lowell Bayles, a genuinely gifted aviator who won the 1931 Thompson Trophy at over 230 miles per hour. He understood the Gee Bee. He had the feel for it.

That December, Bayles was attempting to set a world land speed record when the fuel cap broke loose at high speed and low altitude. Fuel sprayed over the hot exhaust. Lowell Bayles was killed. He was 26 years old.

The Granvilles had lost their pilot and an even faster airplane - the R-1 - already taking shape in the Springfield shop.

Jimmy Doolittle and the 1932 Thompson Trophy

James Harold “Jimmy” Doolittle was born in Alameda, California in 1896. By 1932 he was already one of the most accomplished aviators in the country and one of the very few who approached flying with genuine engineering credentials. He held a doctorate in aeronautical engineering from MIT, making him arguably the most academically credentialed racing pilot in Thompson Trophy history.

He had been the first pilot to complete an outside loop - a maneuver that pulls blood away from the brain rather than toward it. He had already transformed instrument flying, demonstrating that a pilot could take off, fly a complete circuit, and land entirely on instruments with no visual reference to the outside world. That work alone changed aviation permanently.

Doolittle did not simply fly the Gee Bee. He analyzed it. He understood precisely what the short moment arm meant for control response and knew exactly where the margins were. That discipline was what the R-1 required.

On September 3, 1932, at Cleveland, Doolittle flew the R-1 around the Thompson Trophy course at an average speed of 252 miles per hour. That number landed on the front page of newspapers across the country. The Granville Brothers, working out of a former dance hall in Massachusetts, had built the fastest closed-course racing airplane in the world.

Why Doolittle Walked Away from Racing That Night

At the awards banquet that evening, Doolittle accepted the Thompson Trophy and announced he was retiring from air racing. Immediately. Permanently. He was 35 years old, at the height of his ability, and he was done.

His reasoning was direct. The risk in racing aircraft like the Gee Bee was real and quantifiable. He had a wife, Josephine, whom he had known since childhood and married in 1917, and two sons. He had concluded, with the clarity that comes from actually understanding the physics of what he was doing, that the danger was not proportional to what racing accomplished.

That judgment - from a man who had just proved he was the best in the world at the thing he was walking away from - is the part of this story that aviation history rarely dwells on long enough.

What Happened to the R-1 and R-2 After Doolittle

After Doolittle withdrew, the R-1 went back out with other pilots. Russell Boardman, an accomplished aviator who held transcontinental records, took the R-1 on a transcontinental attempt in 1933. He crashed in Vermont. The injuries were severe. He did not survive them.

The R-1 was rebuilt and modified, flew in further races, and was eventually destroyed in additional accidents. The R-2 had a similar history across the 1932 season - accidents, rebuilds, ultimately lost to the same unforgiving margins that claimed the R-1.

Zantford “Granny” Granville was killed in a crash in 1933 in a smaller, unrelated aircraft. Without him, the company that had built the fastest racing airplane in America lost its center. The Granville Brothers Aircraft Company did not survive the decade.

The Gee Bee’s Complicated Legacy for Aviation

The Gee Bee was genuinely dangerous. Not because the Granvilles were reckless, but because they were pursuing the logical extreme of what the sport demanded. The Thompson Trophy rules created an environment that rewarded exactly the tradeoffs the Gee Bee represented.

At the same time, what came out of those years fed directly into the aircraft that would matter in the war five years away. Engine development, aerodynamic understanding, materials and construction techniques - all of it accelerated by racing. The Thunderbolt, the Corsair, the Mustang all stood on the shoulders of what the racing world pushed forward in the early 1930s. The danger and the progress were the same thing.

Doolittle understood that. He didn’t walk away from flying. He walked away from racing. The skills that let him fly the Gee Bee he applied where he believed the application mattered most - including leading the 1942 raid on Tokyo that put his name permanently in the history of the Second World War.

The airplane that was too dangerous to race helped produce the pilot who led the raid on Tokyo.

Where to See the Gee Bee Today

Full-scale replicas of the Gee Bee Model R exist, and some have flown on the airshow circuit. The New England Air Museum in Windsor Locks, Connecticut has a static replica worth seeing. Standing next to one, the proportions are still striking: the tail looks too small, the engine looks too large, and the whole airframe looks like it was assembled by someone with absolute confidence and no interest in conventional stability thinking.

And yet on September 3, 1932, it won the Thompson Trophy at 252 miles per hour. For deeper archival research, the National Air and Space Museum and the New England Air Museum’s Granville Brothers archives are the primary sources.

Key Takeaways

The Gee Bee Model R was built around a single design priority - maximum power-to-drag ratio - with nearly everything else, including stability and pilot safety, traded away to achieve it
Jimmy Doolittle won the 1932 Thompson Trophy at 252 mph in the R-1, then immediately retired from racing, citing the disproportionate risk relative to what racing accomplished
The airplane’s dangerous handling characteristics stemmed from a very short fuselage and small tail moment arm - manageable at race speed, unforgiving at pattern speeds where pilot workload was highest
Lowell Bayles (1931 Thompson winner, killed December 1931) and Russell Boardman (killed 1933 in the R-1) were among the pilots lost to those margins
The racing program that killed pilots also accelerated the engine and aerodynamic technology that powered American fighter aircraft in World War II