The Curtiss-Wright XP-40 prototype, 38-10, on its first flight, 14 October 1938. Test pilot Ed Elliot is in the cockpit. (San Diego Air and Space Museum Archives) 16_008532
14 October 1938: At Buffalo, New York, test pilot Everett Edward Elliot made the first flight in the new Curtiss-Wright Corporation’s Model 75P, a prototype for a single-engine pursuit plane which had been designated XP-40 by the U.S. Army Air Corps.
Curtiss-Wright’s Chief Engineer, Donovan Reese Berlin, had taken the tenth production P-36A Hawk, Air Corps serial number 38-10, and had its air-cooled radial engine replaced with the Harold Caminez-designed, liquid-cooled, supercharged, 1,710.597-cubic-inch-displacement (28.032 liter) Allison Engineering Co. V-1710-C13 (V-1710-19).
Donovan Reese Berlin. (Niagara Aerospace Museum)
The V-1710-19 was a single overhead cam (SOHC) 60° V-12 engine with four valves per cylinder and a compression ration of 6.65:1. It had a Normal Power rating of 910 horsepower at 2,600 r.p.m. at Sea Level, and 1,060 horsepower at 2,950 r.p.m. for Takeoff. At 10,000 feet (3,048 meters), the V-1710-19 had Maximum Continuous Power rating of 1,000 horsepower at 2,600 r.p.m., and Military Power rating of 1,150 horsepower at 2,950 r.p.m. The engine required 100/130-octane aviation gasoline. It drove a three-bladed Curtiss Electric constant-speed propeller through a 2:1 gear reduction. The V-1710-19 was 8 feet, 1.75 inches (2.483 meters) long, 3 feet, 4.75 inches (1.035 meters) high and 2 feet, 4.94 inches (0.735 meters) wide. It weighed 1,320 pounds (599 kilograms).
Curtiss-Wright XP-40 38-10 (SDASM 16_008531)
At 1,829.39-cubic-inches (29.978 liters), the original Pratt & Whitney Twin Wasp S1C1-G (R-1830-17) 14-cylinder radial engine had greater displacement and produced 80 horsepower more for takeoff than the Allison V-12. The long, narrow V-12, though, allowed for a much more streamlined engine cowling for higher speed and greater efficiency.
XP-40 16_008533Curtiss-Wright XP-40 prototype. (SDASM 16_008534)The Curtiss-Wright XP-40 in the original configuration at Langley Field. (NASA)Everett Edward Elliot (1907–1981).
In the early testing, the XP-40 was much slower than expected, reaching only 315 miles per hour (507 kilometers per hour). (The P-36A Hawk had a maximum speed of 313 miles per hour). Engineers experimented with different placement for the coolant radiator, oil coolers and the engine air intake. The Air Corps project officer, Lieutenant Benjamin Scovill Kelsey, had the prototype sent to the National Advisory Committee for Aeronautics (NACA) Research Center at Langley Field, Virginia, where the full-size airplane was placed inside a wind tunnel.
Over a two-month period, NACA engineers made a number of improvements. The radiator was moved forward under the engine and the oil coolers utilized the same air scoop. The exhaust manifolds were improved as were the landing gear doors.
When they had finished, Lieutenant Kelsey flew the modified XP-40 back to Curtiss. Its speed had been increased to 354 miles per hour (570 kilometers per hour), a 12% improvement.
By December 1939 the airplane had been further improved and was capable of 366 miles per hour (589 kilometers per hour).
The Curtiss-Wright XP-40 prototype in a wind tunnel at Langley Field, 24 April 1939. (NASA)Curtiss-Wright XP-40 in the NACA Full Scale Wind Tunnel at Langley Field, Virginia, 24 April 1939. (NASA)
The Curtiss Hawk 75P, XP-40 38-10, was 31 feet, 1 inch (9.574 meters) long with a wingspan of 37 feet, 4 inches (11.354 meters) and overall height of 12 feet, 4 inches (3.734 meters). It had an empty weight of 5,417 pounds (2,457.1 kilograms) and maximum gross weight of 6,870 pounds (3,116.2 kilograms).
The prototype had a maximum speed of 342 miles per hour (550 kilometers per hour) at 12,200 feet (3,719 meters) with a gross weight of 6,260 pounds (2,839.5 kilograms). Its range was 460 miles (740 kilometers) flying at 299 miles per hour (481 kilometers per hour) with 100 gallons (378.5 liters) of fuel. With 159 gallons (601.9 liters) and with speed reduced to 200 miles per hour (322 kilometers per hour), the XP-40 had a maximum range of 1,180 miles (1,899 kilometers).
The prototype was armed with two air-cooled Browning AN-M2 .50-caliber machine guns mounted above the engine and synchronized to fire forward through the propeller arc.
The Air Corps placed an initial order for 524 P-40s. This was the largest single order for airplanes by the U.S. military up to that time. The first production model was the P-40 Warhawk, armed with two .50-caliber machine guns. There was only one P-40A variant which was a P-40 modified as a camera aircraft. The definitive pursuit model was the P-40B Warhawk, which retained the two .50-caliber guns of the P-40 and added two Browning M2 .30-caliber machine guns to each of the wings.
A Curtiss-Wright P-40B Warhawk, 79th Pursuit Squadron, 20th Pursuit Group, Hamilton Field, California, 1940. (U.S. Air Force)
The P-40B was best known as the airplane flown by the American Volunteer Group fighting for China against the Japanese. They were called the “Flying Tigers”. Between 1939 and 1945, Curtiss built 13,738 P-40s in many configurations. They flew in combat in every theater of operations during World War II.
A Curtiss-Wright Hawk 81-A3 (Tomahawk IIb) of the American Volunteer Group, Kunming, China, 1942. (U.S. Air Force)
Lieutenant Russell L. Maughan with his record-setting Curtiss R-6 racer, A.S. 68564, 1922. (U.S. Air Force)
14 October 1922: Air races were an extremely popular event in the early days of aviation. An estimated 200,000 spectators watched the opening race at the National Air Races, held at Selfridge Field (now, Selfridge Air National Guard Base) near Mount Clemens, Michigan from 8 to 14 October.
The Pulitzer Trophy Race was Event No. 5 on the afternoon of Saturday, 14 October. It was a “Free-for-All Race for High-Speed Airplanes.” The course consisted of five laps around an approximate 50 kilometer course, starting at Selfridge Field, then south to Gaulkler Point on Lake St. Clair. From there, the course was eastward for ten miles, keeping to the right of a moored observation balloon. The airplanes would then circle an anchored steamship, Dubuque, and return to Selfridge Field.
Russell Maughan’s record-setting Curtiss R-6 at Selfridge Field, Michigan, 14 October 1922. (San Diego Air and Space Museum)
Lieutenant Russell Lowell Maughan, Air Service, United States Army, flying a Curtiss R-6, Air Service serial number A.S. 68564, finished the race in first place with an average speed of 205.386 miles per hour (330.172 kilometers per hour). He also set two Fédération Aéronautique Internationale (FAI) World Records for Speed during the race: 330.41 kilometers per hour (205.31 miles per hour) over a distance of 100 kilometers,¹ and 331.46 kilometers per hour (205.96 miles per hour) over a distance of 200 kilometers).²
In addition to the Pulitzer Trophy, the first place finisher was awarded a $1,200.00 prize. Second place was taken by another U.S. Army pilot, Lieutenant Lester James Maitland, who was also flying a Curtiss R-6, serial number A.S. 68563.
Russell Maughan had been a fighter pilot during World War I. He shot down four enemy airplanes with his Spad S.XIII C.I, and was awarded the Distinguished Service Cross for bravery in action. He flew in several air races and set records. He went on to fly the Dawn-to-Dusk transcontinental flight in a Curtiss PW-8, 23 June 1924. In World War II he commanded the 51st Troop Carrier Wing during Operation Torch, the invasion of North Africa.
Lester Maitland along with Lieutenant Albert F. Hegenberger, made the first trans-Pacific flight from California to Hawaii in 1927. He was the oldest USAAF pilot to fly combat missions in World War II, flying a Martin B-26 Marauder, the Texas Tarantula, as the commanding officer of the 386th Bombardment Group. He was awarded a Silver Star and retired with the rank of brigadier general.
Curtiss R-6, A.S. 68564, P-278. (FAI)
The Curtiss R-6 Racers were single-engine, single seat, fully-braced single-bay biplanes with fixed landing gear, developed from the U.S. Navy Curtiss CR. The airplane and its D-12 Conqueror engine were both built by the Curtiss Aeroplane and Motor Co., Garden City, New York. The fuselage was a stressed-skin monocoque, built with two layers of wood veneer covered by a layer of doped fabric. The wings were also built of wood, with plywood skins and fabric-covered ailerons. Surface radiators were used for engine cooling.
The two R-6 Racers were built of the U.S. Army at a cost of $71,000, plus $5,000 for spare parts.
The Curtiss R-6 was 19 feet, 0 inches (5.791 meters) long with a wing span of 19 feet, 0 inches (5.791 meters). It had an empty weight of 2,121 pounds (962 kilograms).
The R-6 was powered by a water-cooled, normally-aspirated 1,145.111-cubic-inch-displacement (18.765 liter) Curtiss D-12 dual overhead cam (DOHC) 60° V-12 engine, which was developed by Arthur Nutt, based on the earlier Curtiss K-12 which had been designed by Charles B. Kirkham. The D-12 had four valves per cylinder and a compression ratio of 5.7:1, and was rated at 415 horsepower at 2,000 r.p.m., and 460 horsepower at 2,300 r.p.m. During testing, it produced a 475 horsepower at 2,320 r.p.m. using a 50/50 mixture of 95-octane gasoline and benzol. The D-12 was a direct-drive engine and it turned a two-bladed, fixed-pitch, forged aluminum propeller designed by Dr. Sylvanus A. Reed. The Curtiss D-12 was 56¾ inches (1.441 meters) long, 28¼ inches (0.718 meters) wide and 34¾ inches (0.882 meters) high. It weighed 680 pounds (308 kilograms).
The R-6 racer had a maximum speed of 240 miles per hour (386 kilometers per hour). The service ceiling was 22,000 feet (6,706 meters), and it had a maximum range of 281 miles (452 kilometers).
A.S. 68564 disintegrated in flight at the Pulitzer Trophy Race, 4 October 1924, killing its pilot, Captain Burt E. Skeel.
The Pulitzer Trophy on display at the National Air and Space Museum, Washington, D.C. (NASM)
Lieutenant John A. Macready dressed for high altitude flight. (U.S. Air Force)
John Arthur Macready was born at San Diego, California, 14 October, 1887.¹ He was the second of three sons of Benjamin Macready, a miner, and Mattie Delahunt Beck Macready.
John A. Macready, 1912. (The Quad)
John Macready graduated from Los Angeles High School at Los Angles California, then attended Leland Stanford, Jr., University, near San Francisco, California. He graduated with a Bachelor of Arts degree (A.B.) in economics in 1913.
Following graduation, and while visiting his family, then living near Searchlight, Nevada—where his father had founded the Quartette Mine and Mill, a $7,000,000 ² per year operation—Macready was elected justice of the peace.
The United States entered World War I on 6 April 1917. John Macready enlisted in the U.S. Cavalry, but,
“. . . while on a train, en route to Reno to get his final papers, he picked up the Magazine Section of the The Times and read a story about Rockwell Field.
“Being a native of San Diego—he first saw the light there forty-three years ago—he was particularly interested and made up his mind to learn to fly one of those things everyone was talking about.
“His education, grammar school and high school graduation here—the latter from Los Angeles High School on top of Bunker Hill—and four years at Stanford as a student of economics, came in handy and he was able to switch his enlistment to the United States Army Air Corps [sic] as a private.”
—Los Angeles Times, Vol. XLIX, Sunday, 2 November 1930, Part VI, Page 4 Column 2
On 16 July 1917, Macready was assigned to the Aviation Section, Signal Corps, United States Army, as a Private 1st Class. His draft registration card descibed him as medium height and build, with brown hair and blue eyes. On 27 December 1917, Macready was commissioned a first lieutenant in the Aviation Section, Signal Officers Reserve Corps. Macready was assigned as a flight instructor at Brooks Field, Texas, where he wrote the standard instructional text, The “All Thru” System of Flying Instruction as Taught at Brooks Field.
On 11 October 1918, Lieutenant Macready was promoted to the rank of captain, Air Service, U.S. Army. After World War I, he became an engineering test pilot at McCook Field near Dayton, Ohio. His reserve commission was vacated 18 September 1920, and he was commissioned a first lieutenant, Air Service, 18 September 1920.
Lieutenant John A. Macready demonstrates the aerial application of chemical pesticides over a tree farm near Troy, Ohio, 3 August 1921. The airplane is a Curtiss JN-6. (Photographed by Captain Albert W. Stevens)
On 3 August 1921, near Troy, Ohio, Lieutenant Macready flew a Curtiss JN-6 to perform the first aerial application (“crop dusting”) of pesticides by airplane. Macready flew at an altitude of 20-35 feet (6–11 meters), upwind of a grove of tall catalpa trees. Released 53 yards (48 meters) from the edge of the grove, an 8–11 mile per hour (3.5–5 meters/second) wind carried the arsenate of lead powder and every leaf in the grove was covered.
Lieutenant John A Macready flew this Packard Lepère L USA C. II to an altitude record of 40,800 feet (12,436 meters), 28 September 1921. (U.S. Air Force)
On 28 September 1921, Lieutenant Macready flew a turbo-supercharged Packard Lepère L USA C. II biplane, serial number S.C. 40015, to a world record altitude of 40,800 feet (12,436 meters). He won his first of three Mackay Trophies for this flight.
Macready and Oakley planned to fly a Fokker T-2 across the North American continent, non-stop, from San Diego, California, to New York. The starting point at Rockwell Field was chosen to take advantage of favorable westerly winds, and to use the higher-octane gasoline which was available in California.
Fokker T-2 A.S. 64233 in flight over Rockwell Field, San Diego, California. (This is now NAS North Island.) (San Diego Air & Space Museum)
When they encountered fog in the mountains east of San Diego, the two fliers were forced to turn back. They remained airborne over San Diego to measure the airplane’s performance and fuel consumption for another attempt. They remained airborne for 35 hours, 18 minutes. They were awarded the Mackay Trophy for the most meritorious flight of the year. This was Macready’s second Mackay. He and Kelly would win it again the following year.
Lieutenants John A. Macready and Oakley G. Kelly with their Fokker T-2. (NASM)
Over 2–3 May 1923, Macready and Kelly flew the T-2 on the first non-stop transcontinental flight. The two aviators took off from Roosevelt-Hazelhurst Field, Long Island, New York, at 12:30 p.m. Eastern Time and landed at Rockwell Field (now, NAS North Island), San Diego, California, the next day at 12:26 p.m., Pacific Time. They had flown 2,470 miles (3,975 kilometers) in 26 hours, 50 minutes, 38.8 seconds, for an average speed of 92 miles per hour (148 kilometers per hour). Macready won his third Mackay Trophy for this flight. He is the only person to have won the award three times.
Lieutenant and Mrs John A. Macready (Los Angeles Daily Times)
In the late afternoon of 9 May 1923, Lieutenant Macready married Miss Nelliejay Turner of Columbus, Ohio, at the Los Angeles, California, home of Macready’s parents. The ceremony was conducted by Rev. Charles Thompson of Springfield, Ohio. Lieutenant Oakley Kelly was best man. Miss Turner, then a student at Ohio State University (Kappa Alpha Theta sorority), had been introduced to Lieutenant Macready at the family home the previous year. They would have two daughters, Jo-Ann and Sally Jean Macready.
In 1923, Macready graduated from the Aeronautical Engineer Course, Air Service Engineering School.
On 13 June 1924, Macready was the first pilot to parachute from an airplane at night, when on a flight between Columbus and Dayton, Ohio, the engine of his airplane failed. The Los Angeles Times quoted an Air Service report:
“There being no moonlight, he guided his plane toward an area showing the fewest number of lights. The two flares he released failed to ignite, and he decided to trust to his parachute. Shortly after he launched himself into space his plane crashed and burst into flames. Capt. Macready’s parachute caught in the branches of a tree and he was hanging by the shroud lines over a ravine some ninety feet deep. His shouts brought several persons to his assistance and he was pulled up to safety by means of the parachute cords.”
—Los Angeles Times, Vol. LIV, 2 June 1935 “Times Sunday Magazine,” Page 15, Column 3
Mrs. Macready with her husband, Lieutenant John Arthur Macready, shortly before his altitude record flight, 29 January 1926. (George Rinhart via Daedalians)
On 29 January 1926, Macready took off from McCook Field in an experimental airplane, the Engineering Division XCO-5. Macready was attempting to exceed the existing Fédération Aéronautique Internationale world altitude record of 12,066 meters (39,587 feet), which had been set by Jean Callizo at Villacoublay, France, 21 October 1924.
When the sealed barograph was sent to the Bureau of Standards in Washington, D.C., for calibration, it indicated a peak altitude of 38,704 feet (11,797 meters). This was 269 meters (883 feet) lower than the existing world record, but it did establish a new United States national altitude record.
Lieutenant John A. Macready, USAAS, stands in front of the Engineering Division-built XCO-5. (U.S. Air Force)
For six years John Macready was responsible for testing turbosuperchargers, which enabled aircraft engines to produce continuous power at increasing altitudes. It was while testing these that he established his altitude record.
John Macready resigned from Air Corps in 1926. He worked as an engineer for Frigidaire until 1929, then became head of Shell oil’s aviation division based in San Francisco, California. He flew a Lockheed Vega. He bought a horse ranch in Mariposa County.
Macready crash (Sid Bradd Collection/airrace.com
On 30 August 1930, Macready crashed in a Menasco-engined Keith Rider B-1, NR10216, while practicing for the Thompson Trophy pylon race the National Air Races at Curtiss-Wright Airport in Chicago, Illinois.. A wing strut failed at approximately 162 miles per hour/261 kilometers per hour). Initial news reports were that he had been killed. He suffered a broken nose, fractured shoulder and bruises.
“A wing strut folded as Macready turned the course in the first lap of the free-for-all speed event, according to witnesses. The ship spiraled about drunkenly for an instant, but by skillful maneuvering the former army flier brought it to earth right side up. The plane struck with terrific force, bounded high into the air and was demolished on the rebound.”
In September 1931, Macready was commissioned as a major in the Air Corps Reserve. He was assigned to the 316th Observation Squadron at Crissy Field, Presidio of San Francisco, California.
The New York Times reported that John Macready collaborated with the Bausch & Lomb optical company to to develop the iconic Ray-Ban Aviator sunglasses, which debuted in 1938 and remain in production today.
Ray-Ban Aviator Classic sunglasses. (Ray-Ban)
On June 19 1934, Macready involved in a fatal traffic accident when a motocyclist collided with his car on a blind turn near Yosemite. Macready was not injured.
Colonel John A. Macready, 1940. (Los Angeles Times)
Major Macready was recalled to active duty with the Air Corps on 10 October 1939 and assigned to duty at Hamilton Field, California. He later commanded 9th Air Base Group, and on 1 December 1941, took command of the Air Corps basic flying school at Moffett Field, California. The school operated the Vultee BT-13 trainer and taught formation flying, navigation and cross-country flying.
During World War II, Colonel Macready served as inspector general of Twelfth Air Force during Operation TORCH, the Allied invasion of North Africa. He also commanded the Mediterranean Air Transport Service. Following the war, Macready commanded Merced Army Airfield in California, and in 1946, was acting commanding office of Walla Walla Army Airfield in Washington state. Colonel Macready was transferred to the Air Force retired list in 1948.
In October 1954, an authorized controlled burn on Macready’s thoroughbred horse ranch spread into the surrounding Sierra National Forest. The U.S. Forest Service sued Macready for the cost of fighting the 1,830-acre fire, estimated at $72,662. An Act of Congress attempted to prevent this action, but after many delays, the case went to trial in June 1964. The two-day trial resulted in a “hung jury” and the judge declared a mistrial. A new trial date was set.
On Nov 8, 1958, John A. Macready was awarded the Croix de Guerre by President Andre Pleven of France for his service in North Africa during World War II.
John Arthur Macready died in Mariposa County, California, 15 September 1979, at the age of 90 years.
“Honor is its own reward. There is plenty of glory in connection with flights of this nature, and considerable satisfaction in doing one’s duty as a soldier and accomplishing a feat considered by many to be impossible.”
