Design and Initial Development
The Bee Line BR-1 and BR-2 racing aircraft (short for Booth Racer) were designed by engineers Harry T. Booth and Arthur L. “Mike” Thurston, commissioned by the U.S. Navy. Both machines, bearing serial numbers A6429 and A6430, were meticulously constructed by Aerial Engineering in 1922.
These single-seat aircraft featured a cantilever low-wing design and an innovative retractable landing gear, an advanced characteristic for their era. They were powered by a Wright H-3 engine, capable of producing 390 horsepower, aimed at optimizing their performance in air competitions.
Innovative Cooling Systems
The BR-1 differed from the BR-2 primarily in its cooling system. While the BR-1 incorporated two cylindrical Lamblin radiators, strategically mounted on the sides of the fuselage, the BR-2 adopted a more integrated solution.
On the BR-2, the wings themselves served as radiators, covered with a thin copper sheet to dissipate engine heat. This technological divergence represented an experimental approach in aeronautical design of the time.
Performance at the Pulitzer Air Races
Both aircraft were presented at the prestigious Pulitzer Air Races with high expectations. However, their participation was not without challenges and they failed to achieve the anticipated success. The BR-1 had to withdraw from the competition due to an oil leak.
Meanwhile, the BR-2 faced an even more fundamental issue: it failed to take off. Despite their innovative design and powerful engines, the Bee Line BR-1 and BR-2 could not demonstrate their full potential in competition.
Technical Specifications
| Modification | BR-1 |
| Wingspan, m | 8.56 |
| Length, m | 6.43 |
| Height, m | 1.93 |
| Wing area, m2 | 9.66 |
| Normal takeoff weight | 932 |
| Engine type | 1 Piston engine Wright H-3 |
| Power, hp | 1 x 390 |
| Maximum speed, km/h | 303 |
| Crew | 1 |
Image and diagram gallery of the Bee Line BR-1 and BR-2
 BR-1(2). Photo: NASA |
 BR-1(2) |
 BR-1(2) |
 BR-1(2) |
 BR-1(2) |
 BR-1(2) |
 BR-1(2) |
 BR-1(2) |