20 March 1932: Boeing chief test pilot Leslie Ralph Tower takes the Model 248 (designated XP-936, and later, XP-26), Air Corps serial number 32-412, for its first flight.
The Boeing P-26 was a single-seat, single-engine monoplane. It was the first all-metal U.S. Army pursuit, but retained an open cockpit, fixed landing gear and its wings were braced with wire. The airplane was 23 feet, 7 inches (7.188 meters) long with a wingspan of 28 feet (8.534 meters). The empty weight of the prototype was 2,119 pounds (961.2 kilograms) and gross weight was 2,789 pounds (1,265.1 kilograms).
The R-1340-21 had a Normal Power rating of 600 horsepower at 2,200 r.p.m. at 6,000 feet (1,829 meters); 500 horsepower at 2,200 r.p.m. at 11,000 feet (3,353 meters); and 500 horsepower at 2,000 r.p.m. for takeoff. It required 87-octane gasoline. The –21 had a diameter of 3 feet, 3.44 inches (1.307 meters) and weighed 715 pounds (324 kilograms).
The R-1340-27 had a Normal Power and Takeoff power rating of 570 horsepower at 2,200 r.p.m., to 7,500 feet (1,524 meters), using 92-octane gasoline. The –27 was 3 feet, 7.25 inches (1.099 meters) long, 4 feet, 3.50 inches (1.308 meters) in diameter and also weighed 715 pounds (324 kilograms).
The R-1340-33 was rated at 575 horsepower at 2,200 r.p.m. to 10,000 feet (3,048 meters), and 600 horsepower at 2,120 r.p.m. for Takeoff, with 87-octane gasoline. It was 3 feet, 10.75 inches (1.187 meters) long, with the same diameter as the –27. It weighed 792 pounds (359 kilograms).
The engines drove a two-bladed, Hamilton Standard adjustable-pitch propeller.
The pursuit had a maximum speed of 227 miles per hour (365 kilometers per hour) at 10,000 feet (3,048 meters), and a service ceiling of 28,900 feet (8,809 meters).
As a pursuit, the P-26 was armed with two air-cooled Browning M1919 .30-caliber machine guns, synchronized to fire forward through the propeller arc.
Boeing built 136 production P-26s for the Air Corp and another 12 for export. Nine P-26s remained in service with the Air Corps at the beginning of World War II.
Leslie Ralph Tower was born at Sisseton, South Dakota, 21 January 1903. He was the first of three children of Ralph R. Tower, a farmer who would later serve as a state senator for Montana, and Mayme Amanda Johnson Tower, a Swedish immigrant.
Les Tower attended high school at Polson, Montana, graduating in 1922. He then attended the University of Washington, where he studied engineering. He was a member of the Radio Club.
Tower enlisted in the United States Army as an aviation cadet, training at Brooks and Kelly airfields in Texas. He then served with the 2nd Bombardment Squadron at Langley Field, Virginia.
In 1925 Tower started working for Boeing as a draftsman, but soon began test flying new airplanes, which included the B-9 bomber and the Model 247 commercial airliner. He also demonstrated and delivered Boeing airplanes around the world.
On 20 August 1935, Tower and Louis Wait flew the Model 299 from Seattle to Dayton, approximately 2,100 miles, in 9 hours, 3 minutes, averaging 233 miles per hour (375 kilometers per hour).
Les Tower was aboard the XB-17 as an observer during the 30 October flight. He saw that the control locks had not been released and tried to reach them, but was unable. In the fire that followed the crash, Tower suffered severe burns to his face, right arm and both legs.¹
Leslie Ralph Tower died of his injuries 19 November 1935 at Miami Valley Hospital in Dayton. His remains were transported by train, escorted by Army airplanes, and were buried at Lakeview Cemetery, Polson, Montana.
¹ Leslie Tower was pulled from the burning wreckage of the XB-17 by Lieutenant Robert Kinnaird Giovannoli, who was awarded the Soldier’s Medal for his actions. Lieutenant Giovannoli was killed 8 March 1936 when he right wing of his Boeing P-26 pursuit, serial number 32-414, came off in flight over Logan Field, near Baltimore, Maryland. That airplane appears in the second photograph, above.
© 2025, Bryan R. Swopes