Roman Taskaev in the cockpit of a Mikoyan MiG-29 in flight over Canada, circa 1990. (Vintage Wings of Canada)
26 April 1995: Mikoyan test pilot Roman Petrovich Taskaev flew a MiG-29 to a Fédération Aéronautique Internationale (FAI) World Altitude Record of 27,460 meters (90,092 feet) at Aerodrome Akhtubinsk, Russia. This record still stands.¹
Роман Петрович Таскаев (Roman Petrovich Taskaev) was born at Khilok, Zabayaski Krai, Russian Soviet Federative Socialist Republic, 14 October 1954.
From 1967 through 1971, Taskaev was a member of the Chita aero club, where he participated in gliding and skydiving.
Taskaev entered the Soviet Army in 1971. In 1975, he graduated from the National University of Internal Affairs at Kharkiv, Ukraine Soviet Socialist Republic. He then served with several combat units of the Soviet Air Force. He was promoted to the rank of captain in 1981.
Роман Петрович Таскаев
Captain Taskaev attended the School of Test Pilots in 1983. He was then assigned to the Mikoyan Design Bureau as a test pilot in June 1983. He remained there through May 1998. he was a senior test pilot 1992–1997. He was involved in flight testing the variants of the Mikoyan MiG-23, MiG-25, MiG-29 and MiG-31. He flew a MiG-31 over the North Pole.
Taksaev has ejected from a MiG-23UB at very low altitude and maximum speed following an engine failure, and from a MiG-29M.
By decree of the president of the Russian Federation, 16 August 1992, Taskaev was named a Hero of the Russian Federation with Gold Star. In 1996, he was awarded the order of Courage, and in 1998, he was named an Honored Test Pilot of the Russian Federation.
Since 1998, Roman Taskaev has served as Deputy Director of Flight Testing at the Yakovlev Design Bureau.
Roman Taskaev holds his FAI record certificate. (FAI)
The Mikoyan MiG-29 is a fourth generation, single-seat, twin-engine, Mach 2+ air superiority fighter built by the Mikoyan Design Bureau. It entered service with the Soviet Union in 1983 and has been widely exported to many other nations.
The MiG 29 is 17.320 meters (56 feet, 9.89 inches) long, including the pitot boom. The wingspan is 11.360 meters (37 feet, 3.24 inches) and the overall height is 4.730 meters (15 feet, 6.22 inches). They have an area of 38 square meters (409 square feet). The wings’ leading edges are swept aft to 42°. They have approximately 5° anhedral. The two vertical fins are tilted outboard 6° and their leading edges are swept to 50°. The horizontal stabilizers are swept to 47° 30′.
The fighter has a basic weight of 15,775 kilograms (34,778 pounds) with full internal fuel and a centerline tank. Its maximum takeoff weight is 18,480 kilograms (40,741 pounds).
MiG 29 three-view illustration with dimensions
The fighter is powered by two Klimov RD-33 engines. The RD-33 is a two-spool, axial-flow, afterburning turbofan with a 13 stage compressor section (4 low- and 9 high-pressure stages) and a two-stage turbine (1 high- and 1 low-pressure stages). It has a military power rating of 49.43 kilonewtons (11,111 pounds of thrust), and 81.40 kilonewtons (18,298 pounds) with afterburner. The RD-33 is 1.040 meters (3 feet, 6.95 inches) in diameter, 4.229 meters (13 feet, 10.50 inches) long, and weighs 1,055 kilograms (2,326 pounds).
The MiG 29 has a maximum speed of Mach 2.25 and a service ceiling of 59,100 feet (18,013 meters). Maximum range with internal fuel is 1,430 kilometers (888 miles).
Armament consists of one Gryazev-Shipunov GSh-301 30mm autocannon with 150 rounds of ammunition, and a combination of air-to-air missiles, rockets or bombs carried on underwing pylons or fuselage hard points.
More than 1,600 MiG 29s have been built.
Mikoyan MiG-29SMT RF-92934 (“22 Red”), Russian Air Force. (Alex Beltyukov/Wikipedia)
“Miss Elinor Smith, 17 years old, waving to the crowd of thousands, just after she landed here after establishing a new women’s flight endurance record, 26 hours, 21 minutes, 32 seconds, over four hours better than that of Mrs. McPhetridge of Los Angeles. The plucky girl flew a Ballanca cabin monoplane.” (George Rinhart/Corbis via Getty Images)Elinor Smith with the Bellanca (CTIE/Monash University)
24 April 1929: At Roosevelt Field, Mineola, Long Island, New York, 17-year-old Elinor Smith set a Fédération Aéronautique Internationale (FAI) World Record for Duration by staying aloft over Roosevelt Field, Long Island, New York, in a Bellanca CH Monoplane for 26 hours, 27 minutes. ¹ Miss Smith had very nearly doubled her own record, set just four months earlier. ²
During the flight the airplane’s elevator trim adjustment malfunctioned, forcing Smith to use both arms to hold the stick back to maintain level flight. She dropped a note in a weighted sack to advise those on the ground of the problem.
Elinor Smith with the Bellanca CH Monoplane. (Associated Press/The Los Angeles Times)
The Associated Press reported the event:
FLAPPER ‘ACE’ TOPS WOMEN’S AIR RECORDS
Elinor Smith Is Up Above 26 Hours; Victor Over Four.
By Associated Press,
ROOSEVELT FIELD, N.Y., April 24.—Elinor Smith, 17-year-old flying flapper of Long Island, won a victory Wednesday in the four-sided battle being waged among two women from the eastern seaboard and two from the west for the women’s solo endurance record.
She brought her plane down at 2:2:16 p.m. after 26 hours 21 minutes and 32 seconds in the air, beating the record of 22 hours 3 minutes and 12 seconds established by Louise McPhetridge of California by hours 18 minutes and 20 seconds.
Before Mrs. McPhetridge, Miss Bobbie Trout of California was the record holder. Miss Trout beat an earlier record of Miss Smith, who in turn on that earlier flight beat a record held by Viola Gentry, Long Island’s flying cashier.
Miss Smith’s record Wednesday was within 9 hours, 11 minutes and 49 seconds of the man’s solo endurance flight record of 35 hours, 33 minutes and 21 seconds, established at Roosevelt Field last month by Martin Jensen.
Beats Early Mark
Less than three minutes before, Miss Smith exceeded the first world endurance record ever established at this field. In 1921, Eddie Stinson of Detroit and Lloyd Bertaud, who was lost with the transatlantic plane Old Glory, established a record there of 26 hours, 18 minutes and 35 seconds, which was 2 minutes and 57 seconds less than the record set single-handed Wednesday by Miss Smith.
About 8:30 a.m. a note was dropped from the plane in which the young flier was having trouble with the stabilizer and had both arms “wrapped around the stick.”
Sure of Victory
It was apparent, however, that she did not regard the trouble as serious for the note added: “Tough night but it won’t be long now.”
Miss Smith brought her plane, a cabin monoplane borrowed from G.M. Bellanca, airplane designer, down to a perfect landing.
“I think it’s wonderful that I broke the record. Now I want to get some sleep,” she said as she dodged the crowds and vanished homeward.
Miss Smith’s mother Wednesday night said plans had been made for Elinor to make a transatlantic flight this summer, probably to Rome. She said backers already had been obtained.
—The Milwaukee Sentinel, April 25, 1929, Page 1, Column 4.
A Bellanca CH-200 (San Diego Air & Space Museum Archives)
The Bellanca CH Monoplane (also referred to as the CH-200) was a single-engine high-wing monoplane, designed by Giuseppe Mario Bellanca and built by the Bellanca Aircraft Corporation of America, Newcastle, Delaware. It was operated by one pilot and could carry up to 5 passengers in an enclosed cabin.
The airplane was 27 feet, 9 inches (8.458 meters) long with a wingspan of 46 feet, 4 inches (14.122 meters) and height of 8 feet, 4 inches (2.540 meters). It had an empty weight of 2,275 pounds (1,032 kilograms) and gross weight of 4,072 pounds (1,847 kilograms).
The Bellanca CH Monoplane was powered by an air-cooled, normally-aspirated 787.26-cubic-inch-displacement (12.901 liter) Wright Whirlwind J-5 nine-cylinder radial engine with a compression ratio of 5.1:1. It was rated at 200 horsepower at 1,800 r.p.m., and 225 horsepower at 2,000 r.p.m. This was a direct-drive engine which turned a two-bladed propeller. The Wright J-5C was 2 feet, 10 inches (0.864 meters) long and 3 feet, 9 inches (1.143 meters) in diameter. It weighed 508 pounds (230.4 kilograms).
The airplane’s maximum speed was 126 miles per hour (203 kilometers per hour) and its range was 800 miles (1,287 kilometers).
Elinor Regina Patricia Ward (Smith)
Elinor Regina Patricia Ward was born in New York City, 17 August 1911. She was the second of three children of Thomas Francis Ward, a vaudeville dancer and comedian, and Agnes A. Ward, a singer. In order to avoid being mistaken for another performer, Mr. Ward changed his name to Smith. Miss Ward also adopted the name and is better known as “Elinor Smith.”
Miss Smith took her first flight in an airplane at the age of six years. When she was ten she began flight training in her father’s Weaver Aircraft Co. Waco 9 biplane. Just before her seventeenth birthday she qualified for a pilot’s certificate. It was issued 14 August 1928 by the National Aeronautic Association of the U.S.A., on behalf of the Fédération Aéronautique Internationale. Certificate No. 6906 was signed by Orville Wright, Chairman of the N.A.A.
The National Aeronautic Association issued Aviator Pilot Certificate No. 6906 to Elinor Smith on 14 August 1928, just before her 17th birthday. The document was signed by Orville Wright.Elinor Smith flying under the Manhattan Bridge, 21 October 1928.
Elinor Smith first came to the attention of the general public when, on 21 October 1928, she flew under four bridges on New York City’s East River.
In November 1928 Miss Smith was employed by the Irvin Air Chute Company as a pilot. She toured the United States, flying a Bellanca Pacemaker.
On 10 March 1930, Smith set an FAI world altitude for women of 8,357 meters (27,418 feet). ³ She flew a Bellanca Skyrocket, NC752W.
In May 1930, the Aeronautics Branch, U.S. Department of Commerce issued a Transport License to Miss Smith. She was the youngest pilot to receive that license up to that time.
A 1930 poll of licensed pilots in the United States selected Smith as the Best Woman Pilot in America. Her male counterpart was the legendary Jimmy Doolittle.
Elinor Smith set several U.S. national records for speed, altitude and duration. From 1930 to 1935, she was an expert commentator on aviation for the National Broadcasting Company (NBC) radio network.
On 22 July 1933, Patrick H. Sullivan II, an attorney and member of the New York State Assembly for the 11th District of New York County, married Elinor Smith in New York City. They would have four children. Following the birth of their first child, Patrick H. Sullivan III, Mrs. Sullivan gave up flying.
Elinor Smith was featured on the box of Wheaties breakfast cereal in 1934. (General Mills)
In 1934, Mrs. Sullivan became the first woman to be featured on the box of General Mills’ Wheaties breakfast cereal, “The Breakfast of Champions.” This has always been a high honor for sporting men and women.
After her husband died in 1956, Elinor Smith Sullivan resumed flying, and continued until she was 89 years old.
Mrs. Elinor Smith Sullivan died 19 March 2010 at Lytton Gardens Health Care Center, Palo Alto, California. She was aged 98 years, 7 months and 3 days.
¹ FAI Record File Number 12217. Duration: 26 hours, 27 minutes. 24 April 1929.
² FAI Record File Number 12216. Duration: 13 hours, 17 minutes, 45 seconds. 31 January 1929.
³ FAI Record File Number 12226. Altitude, Female: 8,357 meters (27,418 feet), 10 March 1930.
Elinor Smith and a National Aeronautic Association official check a barograph following an altitude record attempt, 10 March 1930. (Smithsonian Institution, National Air and Space Museum)
Jackie Cochran in the cockpit of The Scarlett O’Hara, a record-setting Lockheed L-1329 JetStar, N172L at Hanover-Langenhagen Airport, 22 April 1962. (FAI)
22 April 1962: Jackie Cochran set 18 Fédération Aéronautique Internationale (FAI) records in one day flying a Lockheed L-1329 JetStar, construction number 5003, FAA registration N172L, and named The Scarlett O’Hara. The route of her flight was New Orleans–Boston–Gander–Shannon–London–Paris–Bonn, with refueling stops at Gander and Shannon.
According to the U.S. Centennial of Flight Commission, Jackie Cochran “…set more speed and altitude records than any other pilot.”
The following are the FAI records that she set on 22 April 1961:
4609, 4615: Speed over a recognized course, Gander, NF (Canada)–Shannon (Ireland): 829.69 kilometers per hour (515.546 miles per hour)
4611, 4616: Speed over a recognized course, Gander, NF (Canada)–London (UK): 749.11 kilometers per hour (465.475 miles per hour)
4612, 4617: Speed over a recognized course, Gander, NF (Canada)–Paris (France): 746.22 kilometers per hour (463.680 miles per hour)
4613, 4618: Speed over a recognized course, Gander, NF (Canada)–Bonn (FRG): 728.26 kilometers per hour (452.520 miles per hour)
4638: Speed over a recognized course, Boston, MA (USA)–Gander, NF (Canada): 816.32 kilometers per hour (507.238 miles per hour)
4639, 4640: Speed over a recognized course, Boston, MA (USA)–Shannon (Ireland): 565.45 kilometers per hour (351.354 miles per hour)
4641, 4642: Speed over a recognized course, Boston, MA (USA)–London (UK): 558.50 kilometers per hour (347.036 miles per hour)
4643, 4644: Speed over a recognized course, Boston, MA (USA)–Paris (France): 564.88 kilometers per hour (351.000 miles per hour)
4645, 4646: Speed over a recognized course, Boston, MA (USA)–Bonn (FRG): 562.56 kilometers per hour (349.559 miles per hour)
12322: Distance, New Orleans, LA (USA)–Gander, NF (Canada): 3,661.33 kilometers (2,275.045 miles)
The first production Lockheed JetStar, c/n 5001, in service with the Federal Aviation Administration, registered N1. (bizjets101)
The Lockheed L-1329 JetStar was the first in a category of small-to-medium-sized jet transports that would become known as the “business jet.” Like many Lockheed airplanes, it was designed by a team led by Clarence L. “Kelly” Johnson, and he retained the first prototype as his personal transport.
The JetStar is operated by two pilots and can be configured for 8 to 10 passengers. The airplane is 60 feet, 5 inches (18.41 meters) long with a wingspan of 54 feet, 5 inches (16.59 meters) and overall height of 20 feet, 5 inches (6.22 meters). The leading edge of the wings are swept to 30°. The JetStar has an empty weight of 24,750 pounds (11,226 kilograms) and maximum takeoff weight (MTOW) of 44,500 pounds.
The two prototype JetStars were powered by two Bristol Siddeley Orpheus engines, but the production models were powered by four Pratt & Whitney JT12A-8 turbojets engines which produced 3,300 pounds of thrust, each. The JetStar 731 was a modification program to replace the turbojet engines with quieter, more efficient and more powerful Garrett AiResearch TFE731 turbofan engines which increased thrust to 3,700 pounds per engine. New production JetStar II airplanes were equipped with these turbofans.
Lockheed L-1329 JetStar (FAI)
The JetStar’s cruise speed is 504 miles per hour (811 kilometers per hour) and its maximum speed is 547 miles per hour (883 kilometers per hour) at 30,000 feet (9,145 meters). The service ceiling is 43,000 feet (13,105 meters) and range is 2,995 miles (4,820 kilometers).
The Lockheed JetStar was in production from 1957 to 1978. 204 were built as civil JetStars and military C-140A Flight Check and C-140B and VC-140B JetStar transports.
The JetStar flown by Jackie Cochran on her record setting flight from New Orleans to Bonn, construction number 5003, eventually was acquired by NASA and assigned to the Dryden Flight Test Center at Edwards Air Force Base, California. It was reregistered as N814NA, and used the call sign NASA 4. No longer in service, NASA 4 is on display at the Joe Davies Heritage Airpark at Air Force Plant 42, Palmdale, California.
Lockheed L-1329 JetStar, N814NA, NASA 4, on static display at the Joe Davies Heritage Airpark, Palmdale, California. (NASA)
Geraldine Fredritz Mock with her Cessna 180, N1538C, at Columbus, Ohio, 19 March 1964. (National Air and Space Museum, Smithsonian Institution)
19 March–17 April 1964: Geraldine Fredritz (“Jerrie”) Mock landed her 1953 Cessna 180, Spirit of Columbus, N1538C, at Columbus, Ohio, completing a circumnavigation of the Earth she had begun at 9:31 a.m., 19 March 1964. Mock was the first woman to complete a circumnavigation by air.¹ Her journey covered 23,103 miles (36,964 kilometers). The total elapsed time was 29 days, 11 hours, 59 minutes. The flight set a Fédération Aéronautique Internationale (FAI) World Record for Speed Around the World, Eastbound, of 52.75 kilometers per hour (32.78 miles per hour).²
Geraldine Mock’s route of flight. (Smithsonian Institution National Air and Space Museum, NASM-9A11714)
Jerrie Mock held twenty-two FAI world records, set between 1964 and 1969.
Jerrie Mock in the cockpit of her Cessna 180.
Cessna 180 serial number 30238 was built by the Cessna Aircraft Company, Inc., Wichita, Kansas, in 1953, and registered N1538C, the first year of production for the model. It was the 238th of 640 Model 180s that were built during the first year of production. 6,193 were built by the time production came to an end in 1986. N1538C was purchased for Jerrie Mock in 1963, with a total of 990 hours on the engine and airframe. The passenger seats were removed and replaced with additional fuel tanks. Additional radios and instruments were installed.
The prototype Cessna 180, N41697. (Ed Coates Collection)
The Cessna Model 180 is an all-metal, four-place, single-engine, high-wing monoplane with fixed landing gear. It is 25 feet, 6 inches (7.772 meters) long with a wingspan of 36 feet, 2 inches (11.024 meters) and height of 7 feet, 6 inches (2.286 meters). If the optional rotating beacon is installed, the height is increased to 7 feet, 9 inches (2.362 meters). The Cessna 180 has an approximate empty weight of 1,525 pounds (692 kilograms), depending on installed equipment, and the maximum gross weight is 2,800 pounds (1,270 kilograms).
Cessna 180 three-view illustration with dimensions. (Cessna)
Spirit of Columbus is powered by an air-cooled, normally-aspirated 471.239-cubic-inch-displacement (7.722 liter) Continental O-470-A horizontally-opposed six-cylinder overhead valve (OHV) direct-drive engine with a compression ratio of 7:1. This engine is rated at 225 horsepower at 2,600 r.p.m., burning 80/87 aviation gasoline, and turns a two-bladed constant speed propellerwith a diameter of 6 feet, 10 inches (2.083 meters).
The airplane has a cruise speed of 162 miles per hour (261 kilometers per hour) at 6,500 feet (1,981 meters), and its maximum speed is 170 miles per hour (274 kilometers per hour) at Sea Level. Its service ceiling is 19,600 feet (5,974 meters). The Cessna 180 has a maximum fuel capacity of 84 gallons (318 liters), giving it an optimum range of 1,215 miles (1,955 kilometers) at 10,000 feet (3,048 meters) and 121 miles per hour (195 kilometers per hour).
An early production Cessna 180, N2824A. (Cessna)
After her around the world flight, Jerrie Mock never flew Spirit of Columbus again. Cessna exchanged it for a new six-place P206 Super Skylane, N155JM. For many years N1538C was hanging over a production line at the Cessna factory. Today, Mock’s Cessna 180 is on display at the Steven F. Udvar-Hazy Center, Smithsonian Institution National Air and Space Museum.
Jerrie Mock with her Cessna P206, N155JM. (FAI)
On 4 May 1964, President Lyndon B. Johnson presented Jerrie Mock with the Federal Aviation Agency Gold Medal for Distinguished Service, and the Fédération Aéronautique Internationale awarded her its Louis Blériot Silver Medal.
President Lyndon Johnson bestows the FAA Gold Medal for Distinguished Service on Geraldine Mock, 4 May 1964. (UPI)
Geraldine Lois Fredritz was born 22 November 1925 at Newark, Ohio. She was the first of three daughters of Timothy J. Fredritz, a clerk for a power company, and Blanche M. Wright Fredritz. Jerrie Fredritz graduated from Newark High School in 1943, then studied aeronautical engineering at Ohio State University, Columbus, Ohio. She was a member of the Phi Mu (ΦΜ) sorority.
Miss Fredritz married Russell Charles Mock, 21 March 1945, in Cook County, Illinois. They would have three children, Valerie, Roger and Gary.
Jerrie Mock wrote about her around-the-world flight in Three Eight Charlie, published by Lippincott, Philadelphia, Pennsylvania, 1970.
Geraldine Fredritz Mock died at Qunicy, Florida, Monday, 30 September 2014, at the age of 88 years. She had requested that her ashes be spread over the Gulf of Mexico.
1953 Cessna 180, N1538C, Spirit of Columbus, on display at the Steven F. Udvar-Hazy Center. (National Air and Space Museum, Smithsonian Institution)
¹ The international organization for flight records, the Fédération Aéronautique Internationale, requires that a circumnavigation cross all meridians in one direction and be at least the length of the Tropic of Cancer, 22,858.729 miles (36,787.559 kilometers).
First Lieutenant Harold Ross Harris, Air Service, United States Army, 1922.
17 April 1923: At Wilbur Wright Field, Dayton, Ohio, First Lieutenant Harold Ross Harris set two Fédération Aéronautique Internationale (FAI) World Speed Records, flying a modified de Havilland XDH-4L powered by a Hall-Scott Liberty 375 engine. Lieutenant Harris averaged 184.03 kilometers per hour (114.35 miles per hour) over a 1,500 kilometer (932.1 miles) closed circuit,¹ and 183.82 kilometers per hour (114.22 miles per hour) over a 2,000 kilometer (1,242.7 mile) course. ²
Harold R. Harris was an important figure in the development of aircraft following World War I. He served as Engineering Officer for the U.S. Army at McCook Field and flew many experimental aircraft, setting records for speed and altitude, and worked on the development of airplanes, engines and other equipment. Harris was the first man to use a parachute to escape an airplane during an actual in-flight emergency.
In civil aviation, Harris was an executive with the company that would become Pan American World Airways. During World War II, he was chief of staff of the Air Transport Command, retiring with the rank of brigadier general, and then returning to commercial aviation as a vice president of Pan Am and later president of Northwest Airlines.
de Havilland XDH-4L A.S. 64593, FAI World Speed record holder. (FAI)
The XDH-4L was a variant of the Airco DH.4, designed by Geoffrey de Havilland. It was a two-place, single-engine biplane intended as a bomber, but the type served in virtually every capacity during World War I and the years following. At McCook Field, American-built DH-4s were commonly used as test beds for engines and other aeronautical equipment.
The standard Airco DH.4 had a crew of two. It was 30 feet, 8 inches (9.347 meters) long with a wingspan of 43 feet, 4 inches (13.208 meters) and height of 11 feet (3.353 meters). Empty weight was 2,387 pounds (1,085 kilograms) and loaded weight was 3,472 pounds (1,578 kilograms). British-built DH.4s were powered by a 1,240.54-cubic-inch-displacement (20.33 liter) liquid-cooled Rolls-Royce Eagle overhead cam 60° V-12 engine which produced 375 horsepower. A gear-reduction system kept propeller r.p.m. below engine speed for greater efficiency.
American-built DH.4 airplanes were produced by the Boeing Airplane Company, Dayton-Wright Airplane Company, Fisher Body Corporation, and Standard Aircraft Corporation. Most were powered by the Liberty L12 engine.
Major Henry H. Arnold standing beside the first Liberty 12 aircraft engine turned out for war use. “Hap” Arnold would later hold the 5-star rank of General of the Army and General of the Air Force. (U.S. Air Force)
The Liberty L12 aircraft engine was designed by Jesse G. Vincent of the Packard Motor Car Company and Elbert J. Hall of the Hall-Scott Motor Company. It was a water-cooled, normally-aspirated, 1,649.336-cubic-inch-displacement (27.028 liter) Liberty L-12 single overhead cam (SOHC) 45° V-12 engine with a compression ratio of 5.4:1. The Liberty produced 408 horsepower at 1,800 r.p.m. The L-12 as a right-hand tractor, direct-drive engine and it turned turned a two-bladed fixed-pitch wooden propeller. The Liberty 12 was 5 feet, 7.375 inches (1.711 meters) long, 2 feet, 3.0 inches (0.686 meters) wide, and 3 feet, 5.5 inches (1.054 meters) high. It weighed 844 pounds (383 kilograms). This engine was produced by Ford Motor Company, as well as the Buick and Cadillac Divisions of General Motors, The Lincoln Motor Company (which was formed by Henry Leland, the former manager of Cadillac, specifically to manufacture these aircraft engines), Marmon Motor Car Company and Packard. Hall-Scott was too small to produce engines in the numbers required.
Following World War I, many DH-4s were rebuilt by Boeing and Atlantic Aircraft. An improved version, the DH-4M, used a tubular steel framework instead of the usual wood construction. DH-4s remained in service with the United States Army as late as 1932.
De Havilland XDH-4L, U.S. Army Air Service serial number A.S. 64593, was used for engineering tests at McCook Field. It carried project number P193 painted on its rudder. At the time of the world speed records, it was powered by a Hall-Scott Liberty 375, a 375 horsepower version of the Liberty V-12 engine. The rear cockpit was faired over and a 185 gallon (700.3 liter) fuel tank installed for long range flights.
