23 June 1924: Lieutenant Russell Lowell Maughan, Air Service, United States Army, took off from Mitchel Field, Long Island, New York, at 3:58 a.m., Eastern Time, and flew across the country to land at Crissy Field, at the Presidio of San Francisco, California at 9:46 p.m., Pacific Time. He covered a distance of 2,670 miles (4,297 kilometers) in 21 hours, 47 minutes. Maughan’s actual flight time was 20 hours, 48 minutes. He averaged 128.37 miles per hour (206.59 kilometers per hour).
His Dawn-To-Dusk transcontinental flight took place on a mid-summer day in order to take advantage of the longer hours of daylight, and he flew from East to West, to follow the advancing Sun across the sky.
Lieutenant Maughan made stops at McCook Field, Dayton, Ohio; St. Joseph, Missouri; North Platte, Nebraska; Cheyenne, Wyoming and Salduro Siding, Utah. The stop at Dayton took 1 hour, 20 minutes when a mechanic over-tightened a fuel line fitting and damaged it. When he arrived at “Saint Joe,” the grass field was wet from rains, restricting his takeoff weight. Unable to carry a full load of fuel, he took off with a reduced load and then made a previously unplanned stop at North Platte, Nebraska, where he topped off his fuel tank.
Russell Maughan was an experienced combat pilot and test pilot. He had been awarded the Distinguished Service Cross for his actions during World War I, and he had competed in numerous air races and had set several speed records.
The airplane flown by Lieutenant Maughan was the fourth production Curtiss PW-8 Hawk, a single-place, single-engine biplane fighter, serial number A.S. 24-204. It was modified by the Curtiss Aeroplane and Motor Company at its Long Island, New York, factory. Curtiss removed the fighters’s two .30-caliber machine guns and added 100 gallons (378.5 liters) to the airplane’s standard fuel capacity of 77 gallons (291.5 liters).
The Curtiss PW-8 Hawk 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. It 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 right-hand tractor direct-drive engine. 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 678.25 pounds (307.65 kilograms).
The PW-8 had a cruise speed of 136 miles per hour (219 kilometers per hour) and maximum speed of 171 miles per hour (275 kilometers per hour) at Sea Level. The airplane’s service ceiling was 20,350 feet (6,203 meters) and its range was 544 miles (875 kilometers).
In the early years of military aviation, pilots undertook various dramatic flights to create public awareness of the capabilities military aircraft. Of this transcontinental flight, Maughan said, “The real reason for my flight across the United States in the sunlight hours of one day was that the chief of the Air Service wanted to show Congress just how unprotected are the people of the Pacific Coast.”
Curtiss PW-8 Hawk A.S. 24-204 was damaged beyond repair at Selfridge Field, Michigan, 11 May 1926.
25 May 1927: At Wright Field, now Wright-Patterson Air Force Base, Dayton, Ohio, First Lieutenant James H. “Jimmy” Doolittle, United States Army Air Corps, was the first pilot to successfully perform an outside loop.
Flying a Curtiss P-1B Hawk pursuit, he began the maneuver in level flight at 10,000 feet (3,048 meters), then pushed the nose down into a dive. When he reached 280 miles per hour (450 kilometers per hour), Doolittle continued to pitch the nose “down” and the airplane flew through a complete vertical circle, with the pilot’s head to the outside of the loop.
Jimmy Doolittle attempted to repeat the outside loop at the 1929 Cleveland National Air Races, with a Curtiss P-1C Hawk, serial number 29-227. The airplane’s wings came off but Doolittle parachuted to safety. (The Curtiss P-1C used wing radiators instead of the large radiator under the nose of the P-1B. This substantially reduced the aerodynamic drag which allowed the airplane to accelerate to too high an airspeed during Doolittle’s maneuver.)
Jimmy Doolittle was one of America’s foremost pioneering aviators. He set many records, won air races, tested and developed new flying equipment and techniques. He was a highly-educated military officer, having earned his Bachelor of Arts from the University of California Berkeley School of Mines, and M.S and D.Sc. degrees in Aeronautical Engineering from the Massachusetts Institute of Technology. As a pioneer aviator, he won every international air race, and had been awarded every international aviation trophy. He was also the first pilot to fly completely by reference to instruments.
During the early days of America’s involvement in World War II, Lieutenant Colonel Doolittle planned and led the Halsey-Doolittle B-25 raid on Japan. He was awarded the Medal of Honor and promoted to brigadier general, and then placed in command of the Twelfth Air Force in North Africa. As a major general, he commanded the Fifteenth Air Force in the Mediterranean Theater of Operations. Lieutenant General Doolittle commanded the Eighth Air Force in England from January 1944 to September 1945. He supervised the transition of the 8th to the Boeing B-29 Superfortress and its eventual transfer to bases on Okinawa to continue the war against Japan. World War II came to an end before any of the 8th’s B-29s actually moved west.
After the war, Lieutenant General Doolittle was placed on the inactive list. On 4 April 1985, by Act of Congress, James H. Doolittle was promoted to General, United States Air Force, Retired.
General James Harold Doolittle is the only person to be awarded both the Medal of Honor and the Medal of Freedom. He died 27 September 1993 at the age of 96 years. He was buried at the Arlington National Cemetery, Arlington, Virginia.
The Curtiss P-1B Hawk was a single-engine, single-seat, single-bay biplane pursuit, an aircraft type now known as a fighter. The airplane and its D-12 Conqueror engine were both built by the Curtiss Aeroplane and Motor Co., Garden City, New York.
The P-1B was 22 feet, 10 inches (6.960 meters) long with an upper wingspan of 31 feet, 6 inches (9.601 meters). The lower wing had a span of 26 feet, 0 inches (7.925 meters), a narrower chord, and was staggered 3 feet, 2½ inches (0.978 meters) behind the upper. Both wings had significant taper with rounded tips. Their angle of incidence was 0°. The upper wing had no dihedral, while the inboard lower wing had 1°, and the outer, 5°. The total wing area was 252 square feet (23.4 square meters). The horizontal stabilizer span was 10 feet, 6.0 inches (3.200 meters) and its incidence could be adjusted from +3° to -1.5°. The vertical fin was offset 2° left of the airplane’s centerline. The overall height of the airplane was 8 feet, 10 inches (2.712 meters).
The P-1B had an empty weight of 2,105 pounds (955 kilograms), gross weight of 2,932 pounds (1,330 kilograms), and maximum weight of 3,562 pounds ( kilograms).
The P-1B was powered by a liquid-cooled, normally-aspirated, 1,145.1-cubic-inch-displacement (18.8 liter) Curtiss D-12D (V-1150-3) dual overhead cam (DOHC) 4-valve 60° V-12 engine with a compression ratio of 5.7:1. It was a direct-drive engine, rated at 415 horsepower at 2,000 r.p.m. at Sea Level, and 460 horsepower at 2,300 r.p.m. The D-12 was 58¾ inches (1.492 meters) long, 34¾ inches (0.883 meters) high and 28¼ inches (0.718 meters) wide. It weighed 680 pounds (308 kilograms). The P-1B was equipped with an aluminum Curtiss-Reed propeller with a diameter of 8 feet, 9 inches (2.667 meters).
The pursuit had a cruise speed of 127 miles per hour (204 kilometers per hour). Its maximum speed was 159.6 miles per hour (256.9 kilometers per hour) at Sea Level, and 157 miles per hour (253 kilometers per hour) at 5,000 feet (1,524 meters). It had a service ceiling of 21,400 feet (6,523 meters) and absolute ceiling of 22,900 feet (6,980 meters). Its range was 342 miles (550 kilometers).
The P-1B was armed with two fixed air-cooled Browning machine guns, one .50-caliber and one .30-caliber.
The Air Corps ordered 93 Curtiss P-1 Hawks between 1925 and 1929.
15 May 1918: The United States Post Office Department began regularly-scheduled transportation of the mail by air. After a short delay the first flight departed from Potomac Park Polo Field, near Washington, D.C., at approximately 11:45 a.m., heading to Philadelphia, Pennsylvania, on the first leg of a relay to New York City, New York. Among many spectators and government officials, there to observe was Thomas Woodrow Wilson, the 28th President of the United States of America.
The weather was described as “fair,” with the air temperature at 70 °F. (21 °C.). The first airplane scheduled to depart was a Curtiss JN-4HM “Jenny,” Signal Corps serial number S.C. 38262. Its pilot was Second Lieutenant George Leroy Boyle, Aviation Section, Signal Officer’s Reserve Corps, United States Army.
S.C. 38262 was a brand new airplane. It had been shipped by railroad from the Curtiss Aeroplane and Motor Company’s plant in Hammondsport, New York, to Hazelhurst Field,¹ Long Island, New York. The airplane was uncrated and assembled, then flown to Bustleton Field, about 15 miles (24 kilometers) from down town Philadelphia.
On the morning of 15 May, Major Reuben H. Fleet flew S.C. 38262 to Washington, D.C., arriving there at 10:35 a.m. Major Fleet met with Lieutenant Boyle to discuss the actual mail flight and assist him with charts for the route. With all the hurried activity, refueling the Jenny was overlooked. When it was time, Boyle was unable to start the airplane’s engine. There was no gasoline available at the polo fields, so some was siphoned from the other airplanes.
Lieutenant Boyle was finally airborne at approximately 11:45 with his load of U.S. Mail.
After taking off, though, Lieutenant Boyle turned toward the south—the wrong direction for Philadelphia.
Boyle soon realized that something was wrong and he landed to try to orient himself. he took off again, but once again recognized that he was lost and landed again, this time, near Waldorf, Maryland. Landing in a soft field, S.C. 38262 nosed over and the propeller was damaged.
Coincidentally, a house near Boyle’s landing site was the home of Assistant Postmaster General Otto Praeger, about 20 miles (32 kilometers) from Washington. Boyle was able to call Washington and report in. He and the mail were driven back to Potomac Park.
Major Fleet wanted to replace Boyle, but was overruled by Post Office officials.
S.C. 38262 was repaired, and on 17 May, Lieutenant Boyle and his load of mail, all of which had been stamped to indicate the first day of air mail service, once again took off on schedule at 11:35 a.m., for Philadelphia. This time, though, Boyle was escorted as far as Baltimore, Maryland, by another pilot. (Sources vary. Some say it was Major Fleet, while others say it was Lieutenant James Edgerton, flying S.C. 38274.) From that point, Boyle had been told, he was to simply follow the shoreline of Chesapeake Bay to Philadelphia.
But, once again, Lieutenant Boyle turned the wrong way. At about 2:45 p.m., low on fuel, he landed near Cape Charles, Virginia, about 125 miles (201 kilometers) to the south of Washington, D.C. Boyle was able to borrow gasoline from a farmer and at 4:15 p.m., was airborne once again.
Darkness approached and Boyle’s fuel was running low. Uncertain of his position, at 7:05 p.m., he landed at the Philadelphia Country Club, which was about 15 miles (24 kilometers) short of his actual destination at Bustelton Field. The airplane struck an obstacle and Lieutenant Boyle was thrown from the cockpit, though he suffered only minor injuries. The Jenny, though, was in worse shape. Its left lower wing was torn off, and its upper wing damaged. The airplane would be repaired, but did not return to service until 10 July 1918.
A member of the club drove Boyle and his load of mail to Bustleton Field, where it was loaded on a train for New York City.
Postal Department officials wanted Lieutenant Boyle to continue flying the mail, but Major Fleet refused. This time, rather than being overruled, he was supported in his decision by Secretary of War Newton Diehl Baker Jr.
On 1 March 1918, the U.S. Postal Department and the United States Army agreed that the Army would fly the mail, beginning 15 May 1918. Major Reuben Hollis Fleet, Aviation Section, Signal Corps, was placed in charge of the project by Secretary of War Baker. The Signal Corps ordered 18 airplanes for the purpose: six Curtiss Aeroplane and Motor Co, JN-4HTs, serial numbers S.C. 37944, 38262, 38274, 38275, 38276, 37278; six Liberty-powered Curtiss R-4Ls, S.C. 39362–39367; and six JR-1Bs, serial numbers 1–6, from the Standard Aircraft Corporation, Plainfield, New Jersey. Fleet told Curtiss to modify the Jennys by removing the seat and flight controls from the forward cockpit, and to add a hopper to hold the mail. The airplanes were also given increased fuel and lubricating oil capacity. The airplanes were redesignated JN-4HM.
Major Fleet was told to select four pilots, while the Post Office Department would choose another two. He chose 1st Lieutenants Howard Paul Culver, Walter Miller and Torrey H. Webb, and 2nd Lieutenant Stephen Bonsal, Jr.
The two Army pilots chosen by the Post Office were 2nd Lieutenant George L. Boyle and 2nd Lieutenant James C. Edgerton. These two officers had just completed flight training and had only about 60 hours flight time, each.
But George Boyle was engaged to Miss Margaret Grundy McChord, the daughter of Judge Charles Caldwell McChord, Chairman of the Interstate Commerce Commission. Lieutenant Edgerton was the son of James A. Edgerton, the purchasing agent of the Post Office.
Not much is known about George Leroy Boyle. He was born at Fort Scott, Kansas, during October 1891. He was the first of four children of Louis C. Boyle, a lawyer who had been born in Canada, and Gertrude Boyle, of Illinois. George had three younger sisters, Catherine G., Clara L., and Gertrude Boyle.
Boyle may have studied at the University of Missouri, Columbia, in 1912, and/or the Kansas City School of Law, Kansas City Missouri, as a member of the Class of 1915.
Boyle is believed to have attended ground school at Princeton University, Princeton, New Jersey, from 17 November 1917 to 26 January 1918. He was commissioned as a second lieutenant in the Aviation Section, Signal Corps, United States Army, and ordered to report to Park Field at Millington, Tennessee, for primary flight training. He then completed advanced flight training at Ellington Field, Houston, Texas.
One month following his unfortunate beginning as an air mail pilot, George Leroy Boyle married Miss McChord. The ceremony was held at 5:00 p.m., 15 June 1918, in the Red Parlor of the New Willard Hotel, a luxurious Beaux-Arts-style hotel near the center of Washington, D.C. The wedding, “One of the most notable of the June weddings in the capital,” was officiated by Rev. Walter Everett Burnett.
Lieutenant Boyle’s military career seems to have come to an end at about this time. In 1920, he and Mrs. Boyle (along with her father, Judge McChord) were residents at the Willard, and Boyle was a practicing attorney.
Mrs. Boyle gave birth to a daughter, Josephine Fairchild Boyle, in Washington, D.C., 15 April 1921.
By 1924, the Boyles were living apart. George Boyle was practicing law in Kansas City, Missouri, while Mrs. Boyle and her daughter remained in Washington, D.C.
Nothing else seems to be known about George Leroy Boyle.
There is another interesting story associated with George Boyle and the First Day of U.S. Air Mail service.
The Post Office Department issued a new 24-cent postage stamp for air mail. The stamp was issued on 10 May 1918. Due to an error in printing, the blue portion of the image, the airplane was printed inverted in reference to the red portion. Only about 100 stamps are known to have been printed this way. Known as the “Inverted Jenny,” this is one of the most famous and valuable postage stamp errors known.
The airplane on the stamp, a Curtiss Jenny, is marked with the serial number 38262—Lieutenant Boyle’s airplane.
An example of this stamp sold at auction in 2016 for $1,351,250 (including buyer’s premium).
The Curtiss JN-4 “Jenny” was a single-engine, two place, two-bay biplane, designed and built by the Curtiss Aeroplane and Motor Company, Hammondsport, New York, and used primarily as a training aircraft. It was also produced by five other manufacturers under license: the Fowler-Howell & Lesser Co., San Francisco, California; Liberty Iron Works, Sacramento, California; Springfield Aircraft Corporation, Springfield, Massachusetts; St. Louis Aircraft Corporation, St. Louis, Missouri; and the U.S. Aircraft Corporation.
The JN-4 was 27 feet, 4 inches (8.306 meters) long, with an upper wing span of 43 feet, 7-3/8 inches (13.294 meters) and lower span of 33 feet, 11¼ inches (10.344 meters). The height of the airplane in flight attitude was 9 feet, 10-5/8 inches (3.013 meters). The JN-4H variant had an empty weight of 1,625 pounds (737 kilograms), and gross weight of 2,269 pounds (1,029 kilograms).
The wings had a chord of 4 feet, 11½ inches (1.551 meters), and vertical gap of 5 feet, 1¼ inches (1.556 meters). The lower wing was staggered 1 foot, 4 inches (0.406 meters) behind the upper. The wings had 2º angle of incidence and 1° dihedral. There was no sweep. The ailerons were on the upper wing. The total wing area was 353.06 square feet (32.80 square meters).
While the most common variant of the JN-4, the JN-4D, was equipped with the Curtiss OX-5 engine, the JN-4H was powered by a Wright-Hispano, or more commonly, the “Wright-Hisso,” a design licensed by the Wright-Martin Aircraft Corporation, New Brunswick, New Jersey, from the Société Française Hispano-Suiza. Many sources state that the engine of the JN-4H was a Wright-Hisso E, but almost universally, they indicate that it was rated at 150 horsepower. The Model E, however, was rated at 180 horsepower, while the 150 horsepower engine is identified as the Model A. There was also an improved 150-horsepower Model I. Wright-Martin began producing the Model E in September 1916, All three of these engines are very similar. It is uncertain which model was actually installed in the JN-4HM mail planes.
The Wright-Hispano Models A, E and I were liquid-cooled, normally-aspirated, 717.629-cubic-inch-displacement (11.760 liter) single overhead camshaft (SOHC) 90° V-8 engines. All were direct drive. The A and I variants had a compression ratio of 4.72:1, while the Model E ratio was 5.33:1. The Model E was designed to operate 300 r.p.m. faster than the A or I, and was strengthened for the higher loads. The Models A and I were rated at 150 horsepower at 1,540 r.p.m. at Sea Level. The Model E produced 185 horsepower at 1,750 r.p.m., and 195 horsepower at 1,850 r.p.m. The dry weight of the Model E was 470 pounds (213 kilograms).
The Curtiss JN-4HM had a cruise speed of 75 miles per hour (121 kilometers per hour) and maximum speed of 91 miles per hour (146 kilometers per hour). Its service ceiling was 7,500 feet (2,286 meters) and the airplane’s range was 155 miles (249 kilometers).
¹ On 15 July 1918, Hazelhurst Field was renamed Mitchel Field in honor of James Purroy Mitchel, mayor of New York City, 1914–1917. The name change was officially approved in April 1919. James Mitchel had joined the Aviation Section, Signal Corps. on 6 July 1918, he was killed when he fell from an airplane near Gerstner Field, Louisiana.
27 April 1911: At Fort Sam Houston, Texas, the Aeronautical Division of the Signal Corps, United States Army, accepted its second airplane, a Curtiss Model D Type IV. The airplane was built by Glenn H. Curtiss’ Curtiss Aeroplane and Motor Company at Hammondsport, New York. It was known as a “Curtiss Pusher,” as it was propelled by a propeller behind the engine. The aircraft was a canard configuration with elevators mounted in front. It had tricycle landing gear.
The airframe was primarily spruce and ash, with flying surfaces covered with doped fabric. It was easily disassembled for transport on Army wagons.
The Wrights had patented their “wing-warping” system of flight controls and refused to allow Curtiss to use it. The Model D used ailerons instead, which was a superior system.
The Model D Type IV had a length of 29 feet, 3 inches (8.915 meters) with a wingspan of 38 feet, 3 inches (11.659 meters) and height of 7 feet, 10 inches (2.388 meters). Its empty weight was 700 pounds (317.5 kilograms) and loaded weight was 1,300 pounds (589.7 kilograms).
The engine was a “Curtiss Vee,” an air-cooled, normally-aspirated, 268.336-cubic-inch displacement (4.397 liter) Curtiss Model B-8 90° V-8 engine, producing 40 horsepower at 1,800 r.p.m. The Model B-8 was 29½ inches (0.75 meters) long, 19 inches (0.48 meters) high and 17 inches (0.43 meters) wide. It weighed approximately 150 pounds (68 kilograms). The engine drove a two-bladed, fixed-pitch wooden propeller in pusher configuration.
The airplane’s top speed was 60 miles per hour (96.6 kilometers per hour). Endurance was 2½ hours.
The Signal Corps assigned serial number S.C. No. 2 to the Curtiss. Intended as a trainer, it was in service until 1914, when it was scrapped.
A reproduction of S.C. No. 2 is on display at the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio.
17 January 1932: The 11th Bombardment Squadron, U.S. Army Air Corps, commanded by 1st Lieutenant Charles H. Howard and based at March Field, Riverside, California, flew six Curtiss B-2 Condor bombers to drop food and supplies to the Navajo reservation near Winslow, Arizona. A severe winter storm had isolated the community and caused the deaths of thousands of livestock.
More than 30,000 pounds (13,600 kilograms) of food was dropped to support the 20,000 people of the Navajo and Hopi nations effected by the winter storms.
Lieutenant Howard and the 11th Bombardment Squadron won the Mackay Trophy for the most meritorious flight of the year. This was the first time that the Mackay was awarded to a group.
Charles Harold Howard was born at Ashland, Oregon, 29 December 1892. He was the first of two children of Charles B. Howard, a telegraph operator, and Mary Ann Kincaid Howard.
Howard enlisted as a private in the Signal Corps, United States Army, 23 November 1917. He served with Company C, 322nd Field Signal Battalion, and the Aviation Section, Signal Corps. He was commissioned as a second lieutenant, Air Service, 7 November 1918.
In 1920, Lieutenant Howard was an instructor at the Air Service Flying School at Love Field, Dallas, Texas. In a reorganization of the Air Service, his commission was vacated 15 September 1920 and he was appointed a second lieutenant, Air Service, with date of rank retroactive to 1 July 1920. Howard was promoted to first lieutenant, 30 August 1924.
Captain Howard was killed in an aircraft accident near Bryan Mill, Texas, 25 October 1936. His remains were buried at the Mountain View Cemetery, Ashland, Oregon. Howard Air Force Base, Panama, was named in his honor.
The following is excerpted from the Davis-Monthan Aviation Field Register web site:
The Air Corps Newsletter of November 1, 1936 reports his passing and summarizes his flying career:
“An airplane accident on the night of October 25th, near Bryan’s Mill, Texas, cost the lives of Captain Charles H. Howard and Corporal Edward N. Gibson, Air Corps, both of whom were stationed at Langley Field, VA.
“Captain Howard, who enlisted in the Aviation Section, Signal Corps, during the World War, was an efficient and capable officer, an expert pilot, and was particularly well versed in the field of radio communications.
“. . . after serving for a brief period with Company C, 322nd Field Signal Battalion, Fort Lewis, Washington, he was transferred to Kelly Field, Texas, where he served with the 84th Aero Squadron. . .
“During the next four years, Captain Howard’s duties related mainly to radio communications. . .
“In January 1926, Captain Howard was transferred to the Panama Canal Department, where he served for three years, being on duty with the 7th Observation Squadron at France Field for two years, and with the 25th Bombardment Squadron in the remaining year.
“From Panama, Captain Howard was transferred to Rockwell Field, Calif., when he was assigned to the 11th Bombardment Squadron. He also served as Communications Officer of the 7th Bombardment Group. Later, when the Squadron was transferred to March Field, Calif., he was placed in command thereof.”
It was during this time that he and his crew won the Mackay Trophy.
“During the summer of 1934, Captain Howard piloted one of the B-10 Bombardment planes in the Army Alaskan Flight, from Washington, D.C., to Fairbanks, Alaska, and return. This aerial expedition of ten B-10 airplanes was commanded by Brigadier General Henry H. Arnold. The flight was completed according to a prearranged schedule in exactly one month. In addition to his duties as pilot, Captain Howard served as Assistant Communications Officer of the expedition. . .
“Captain Howard had to his credit over 4,000 hours flying time. He was the author of various articles dealing most interestingly and convincingly with subjects in which he particularly specialized – Bombardment Aviation and Radio Communications.”
—Davis-Monthan Aviation Field Registerhttp://www.dmairfield.com/index.php
The Curtiss B-2 Condor was a large (by contemporary standards) twin-engine biplane bomber, operated by a crew of five. It was 47 feet, 4.5 inches (14.440 meters) long with a 90 foot (27.432 meter) wingspan and overall height of 16 feet, 6 inches (5.029 meters). The airplane had an empty weight of 9,300 pounds (4,218.4 kilograms) and loaded weight of 16,591 pounds (7,525.6 kilograms).
The B-2 was powered by two liquid-cooled, normally-aspirated 1,570.381-cubic-inch-displacement (25.734 liter) Curtiss Conqueror V-1570-7 DOHC 60° V-12 engines producing 633 horsepower at 2,450 r.p.m., each, driving three-bladed propellers.
The bomber had a maximum speed of 132 miles per hour (212 kilometers per hour) at Sea Level and a range of 805 miles (1,296 kilometers).
Although the Condor’s service ceiling was 16,140 feet (4,920 meters), Lieutenant Howard flew one to 21,000 feet (6,400 meters) while conducting an experiment in cosmic ray research for Dr. Robert Andrews Millikan of Caltech, Pasadena, California. (“Service ceiling” is the altitude above which an aircraft can no longer maintain at least a 100 feet per minute/0.5 meters per second rate of climb.)
Defensive armament consisted of six .30-caliber Lewis machine guns, with gunners’ positions at the nose and behind each engine. The B-2 could carry 2,500 pounds (1,134 kilograms) of bombs.
Including the XB-2 prototype, 13 B-2s were built, and a single B-2A. They were removed from service by 1934 as more modern designs became available.