22–24 February 1921

Second Lieutenant William D. Coney, Air Service, United States Army, with an Atlantic Aircraft Corporation DH-4M-2, serial number A.S. 63385. A reproduction of this airplane is in the collection of the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio. (Smithsonian Institution)
First Lieutenant William DeVoe Coney, Air Service, United States Army, with an Atlantic Aircraft Corporation DH-4M-2, serial number A.S. 63385. A reproduction of this airplane is in the collection of the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio. (Smithsonian Institution)

22–24 February 1921: First Lieutenant William DeVoe Coney, Air Service, United States Army, flew across the North American continent with just a single fuel stop. His airplane was an Atlantic Aircraft Corporation DH-4M-2, a version of the Airco DH.4 designed in England by Geoffrey de Havilland. The following is a contemporary news account of his flight:

First One-Stop Flight Across the United States

Early in January the Chief of the Army Air Service announced that on Feb. 22 an attempt would be made to cross the United States by airplane in a period of twenty-four hours, thus establishing a new trans-continental speed record.

The original schedule called for a flight of 2,079 miles, from Rockwell Field, San Diego, Calif., to Pablo Beach, Jacksonville, Fla., with a stop at Ellington Field, Houston, Tex. This would have cut the journey into two legs of 1,275 miles and 804 miles, respectively. Lieut. William D. Coney, 91st Aero Squadron was to make the flight from the west, while Lieut. Alexander Pearson was to start from the east, both flying specially rebuilt D.H.-4 army airplanes.

Lieutenant William D. Coney's transcontinental airplane, Atlantic DH-4M-2 A.S. 63385. A reproduction of this airplane is in the collection of the National Museum of the United States Air Force. ( )
Lieutenant William D. Coney’s transcontinental airplane, Atlantic DH-4M-2 A.S. 63385. A reproduction of this airplane is in the collection of the National Museum of the United States Air Force. (Aviation and Aircraft Journal)

Lieutenant Coney’s Flight

Shortly before the flight it was announced that Lieutenant Coney would stop at Love Field, Dallas, Tex., instead of at Ellington Field, because the former affords more complete repair facilities.

Lieutenant Coney took off from at Rockwell Field at 7 p.m. in his attempt to cross the United States within twenty-four hours. He carried, beside a package of official mail from the commander of the San Diego naval air station to the commander of the Pensacola naval air station, two bottles of hot coffee and 4 lb. of chocolate. The use of the hot liquid was particularly advisable in view of the all-night trip, where drowsiness might have fatal results.

The following morning, having outridden heavy snow and rain storms over New Mexico, the pilot was forced to land owing to a shortage of fuel at Bronte, Tex. There he experienced difficulty in re-fueling and the gasoline he finally obtained was of such inferior grade that the Liberty engine refused to start.

Delay in getting high grade gasoline kept Lieutenant Coney on the ground until nightfall, when he again took off, risking a second all-night flight in a dogged attempt to make good his loss of time.

His efforts were rewarded by success when he landed on the morning of Feb. 24 at 7:27 a.m. at Pablo Beach, having spanned the United States in 22 hr. 30 min. flying time. The total elapsed time from coast to coast was, owing to fuel shortage, 36 hr. 27 min.

In discussing the journey Lieut. Coney states that he attained the greatest height when passing over the Mississippi River, when he rose to 17,000 feet to escape a heavy fog. In passing over the Rockies, although believing himself high enough to miss any treacherous mountains, he almost sent his De Haviland against a snow capped peak which he barely saw in time to pass around. He was making 200 m.p.h. at the time.

Lieut. Pearson had less luck in his attempt, for he experienced engine trouble en route and had to land for repairs. This required too much time to make it worth while resuming the flight.

Lt. W. D. Coney’s Career

Sec. Lieut. William D. Coney, Air Service, was born in Atlanta, GA., on Nov. 21, 1893. His education was received at the Georgia Institute of Technology.

The month after the United States engaged in the war—in May, 1917—Lieutenant Coney entered the first Officers’ Training Camp at Fort McPherson, Georgia, from which camp he was transferred to the Aviation Ground School at the Georgia Institute of Technology on July 10, 1917. On Sept. 8 of the same year he was sent to Essington, Pennsylvania, where he received flying training. During the latter part of Oct., 1917, he was sent to Kelly Field, San Antonio, Texas, where after graduating on Jan. 8, 1918, he received a commission as Second Lieutenant in the Air Service. At Kelly Field he acted as flying instructor from the date of his graduation until Oct. 1918, when he received orders to proceed to a port of embarkation in New York preparatory to going over seas for active military duty. Due to the signing of the armistice, however, orders covering his sailing were revoked and he was sent to Carlstrom Field, Arcadia, Fla., on Dec. 22, 1918. Here he again acted as flying instructor, and was also a member of the Testing and Engineering Department a this field.

Ordered to Washington on May 15, 1919, Lieutenant Coney served as a member of the Information Group in the office of the Chief of Air Service until Feb 8., 1920. At this time he was sent to Mather Field, Sacramento, Calif., where he was assigned to the 91st Aero Squadron, of which he has been a valuable officer up to the present time.

Lieutenant Coney has rendered efficient service on duty with a detachment of the 91st Squadron in the southern part of the state in connection with the aerial border patrol operating between the United States and mexico. He further proved his value to the Air Service by accomplishing exceptionally fine work during the past season as an aerial forest fire patrol pilot operating out of Medford, Ore.

Aviation and Aircraft Journal, Volume X, No. 11, March 14, 1921 at Pages 332–333.

A brief account of Lieutenant Pearson’s unsuccessful flight, and Lieutenant Coney’s attempted return flight follows:

“. . . In February 1921, an Army flier, Lieutenant Alexander Pearson, Jr., decided to fly across the continent from east to west. But on the flight to Texas from Jacksonville, his official takeoff point, he became lost over the Big bend of the Rio Grande and drifted across the border to land in Mexico. Pearson was listed as missing until he showed up a few days later, riding into the village of Sanderson, Texas, on a mule. In March of the same year another Army airman, Lieutenant William D. Coney, took off from Florida on what he hoped would be a one-stop flight to the West Coast. But his plane crashed in Louisiana, and Coney died of his injuries a few days later.”

Famous First Flights That Changed History: Sixteen Dramatic Adventures, by Lowell Thomas and Lowell Thomas, Jr., Lyons Press, 2004, Chapter IV at Page 51.

An official U.S. Air Force history includes this short description:

“Believing he could fly coast to coast within 24 hours, he tried again, leaving Jacksonville on March 25, 1921. Lost in fog and having motor trouble, he hit a tree while landing. Taken to a hospital at Natchez, Mississippi, he died there 5 days later.”

Aviation in the U.S. Army 1918–1939, by Maurer Maurer, Office of Air Force History, Washington D.C., 1987, Chapter XI at Page 177.

This reproduction of Atlantic Aircraft Corporation DH-4M-2, serial number A.S. 63385, is in the collection of the National Museum of the United States Air Force. (U.S. Air Force)
This reproduction of Atlantic Aircraft Corporation DH-4M-2, serial number A.S. 63385, is in the collection of the National Museum of the United States Air Force. (U.S. Air Force)

William DeVoe Coney was born at Atlanta, Georgia, 20 November 1893. He was the third child of Edgar Fairchild Coney, a coal dealer, and Martha Ann Dillon Coney.

Lieutenant William DeVoe Coney was buried at Palmetto Cemetery, Brunswick, Georgia.

© 2017, Bryan R. Swopes

23 February 1951

Dassault Mystere 01, F-FWUU
Dassault Mystère MD.452, F-WFUU. (Dassault Aviation)
Constantin Wladimir Rozanoff. (Dassault)
Konstantin Wladimir Rozanoff. (Dassault Aviation)

23 February 1951: At Istres, France, Société des Avions Marcel Dassault chief test pilot Konstantin Wladimir (“Kostia”) Rozanoff made the first flight of the Mystère MD.452 prototype, F-WFUU, c/n 01. This was a development of the Dassault Ouragan MD.450 with the wings’ leading edge swept from 14° to 30°. It was powered by a Rolls-Royce Nene turbojet engine. Rozanoff believed, though it was not confirmed, that he had broken the Sound Barrier.

A series of prototypes were built before the fighter bomber was put into production as the Mystère IIC. 171 were built between 1954 and 1957.

Kostia Romanoff with the first prototype Dassault Mystere. (Dassault)
Kostia Rozanoff with the first prototype Dassault Mystère, F-WFUU, c/n 01. (Dassault Aviation)

The Mystère IIC was a single seat, single engine turbojet-powered fighter bomber produced for the Armée de l’Air. It was 38 feet 6 inches (11.735 meters) long with a wingspan of 42 feet, 9 inches (13.030 meters) and overall height of 14 feet (4.267 meters). The fighter had an empty weight of 11,495 pounds (5,214 kilograms) and maximum takeoff weight of 16,480 pounds (7,475 kilograms). The powerplant was a SNECMA ATAR 101D-1 turbojet which produced 6,610 pounds of thrust (29.403 kilonewtons).

The maximum speed of the Mystère IIC was 660 miles per hour (1,062 kilometers per hour). Its range was 550 miles (885 kilometers) and the service ceiling was 50,000 feet (15,240 meters).

Dassault Mystère MD.452, F-WFUU. (Dassault Aviation)
Dassault Mystère MD.452, F-WFUU. (Dassault Aviation)

The MD.452 was armed with two Direction des Études et Fabrications d’Armement (DEFA) 30mm revolver cannon with 150 rounds of ammunition per gun, and up to 2,000 pounds (907 kilograms) of bombs.

The prototype Dassault Mystère, F-WFUU, crashed at Istres 3 March 1953 when a wing tip fuel tank broke away and struck the airplane’s tail, killing test pilot Charles Monier.

Kostia Romanoff was killed 3 April 1954 while demonstrating a Mystère IVB.

Constantin Wladimir Rozanoff, Chief Pilot, Dassault Aviation, with a Mystère IV. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Konstantin Wladimir Rozanoff, Chief Pilot, Dassault Aviation, with a Mystère IV. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

© 2017, Bryan R. Swopes

Guards Lieutenant Natalya Fedorovna Meklin, Hero of the Soviet Union

Guards Lieutenant Natalya Fedorovna Meklin, Hero of the Soviet Union. (Colorized by Olga Shirnina: “Color by Klimbim.” Image used with permission.)

23 February 1945: Guards Lieutenant Natalya Fedorovna Meklin, a senior pilot with the 46th Guards Night Bomber Aviation Regiment, 325th Night Bomber Aviation Division, 4th Air Army, was awarded the title Hero of the Soviet Union by decree of the Supreme Soviet of the Union of Soviet Socialist Republics. This was in acknowledgement of the 840 combat missions that Lieutenant Meklin had flown to date. She was also awarded the Order of Lenin with Gold Star. The medals were presented to her by Marshal Konstantin Rokossovsky, 8 March 1945, while she was on duty in Poland. By the end of The Great Patriotic War, she had flown 982 combat sorties.

Natalya Fedorovna Meklin, circa 1940

Natalya Fedorovna Meklin was born 8 September 1922, at Lubny, Poltava, Ukraine. As a teenager, she attended High School No. 79 in Kiev, where she participated in gymnastics and competitive small-bore rifle and pistol shooting. She graduated in 1940.

Following high school, Natalya Fedorovna learned to fly at the Kiev Young Pioneer Palace glider school. In 1941 she went to the Moscow Aviation Institute. During July and August the students were sent to Bryansk to dig tank traps as defense against the Nazi invasion.

Inspired by famed Soviet pilot Marina Mikailovna Raskova, in October 1941 Natalya Fedorovna joined the women’s aviation regiments being formed by Raskova. She was sent to the Engels Military Aviation School, near Saratov, Russia, where she spent seven months in training as a pilot and navigator. Graduating in May 1942, Lieutenant Meklin was assigned to the 588th Night Bomber Aviation Regiment as chief of communications. The unit was then fighting on the southern Caucasian Front.

The women in the night bomber regiments made night attacks behind enemy lines flying the Polikarpov U-2 light bomber. They often approached their target at very low altitude and made gliding attacks. Their effect was to demoralize enemy soldiers and keep them awake. The Germans called them die Nacthexen (the Night Witches).

Lieutenant Meklin circa April 1943. She is wearing the Order of the Red Star and Order of the Patriotic War.

Lieutenant Meklin was awarded the Order of the Red Star on 19 October 1942. In 1943, she became a member of the Communist Party of the Soviet Union. Comrade Melkin flew 380 combat sorties as a navigator, and was then assigned as a pilot.

In February 1943, the 588th Aviation Regiment was redesignated the 46th Guards Night Bomber Aviation Unit. On 27 April 1943, Guards Lieutenant Meklin was awarded the Order of the Patriotic War, Second Class.

The following year, 14 April 1944, Lieutenant Meklin was awarded the first of three Orders of the Red Banner. A second followed on 14 December 1944, and the third, 15 June 1945.

Following The Great Patriotic War, Lieutenant Meklin’s status became that of a reserve officer. For the next two years, she studies at Moscow University, then in 1947, returned to active duty. She rose to the rank of major. She attended the Military Institute of Foreign Languages, graduating in 1953, and served as a translator in the 6th Directorate of the Ministry of Defense, where she was involved in the development of proposals for the production of various types of nuclear weapons, and preparation and coordination of tactical and technical requirements of nuclear weapons.

In January 1956, Major Meklin married  Yuri Fedorovich Kravtsov, and she assumed the name Kravtsova.

Major Natalya F. Kravtsova retired from the Air Force in September 1957. She was employed as a supervising editor at the Publishing House of Military Technical Literature in 1960, and then in 1961 as a translator/editor inn the Bureau of Foreign Military Literature.

On 11 March 1985, Natalya Fedorovna was awarded the Order of the Patriotic War, First Class.

Natalya Fedorovna Kravtsova with her son, circa 1960.

Comrade Kravtsova was the author of many articles and books, the last being We Were Called Night Witches (published in 2005).

Natalya Fedorovna Kravtsova, Hero of the Soviet Union, died 5 June 2005, in Moscow. Her remains were interred at the Troyekurovskoye Cemetery in Moscow.

Three-view illustration with dimensions in millimeters. (Самолет У-2 manual)
Михаи́л Миха́йлович Гро́мов

The Самолет У-2 (Airplane U-2) was designed by Nikolai Nikolaevich Poliparkov as a basic trainer. It made its first flight 7 January 1928 with test pilot M.M. Gromov. The airplane was produced in two- and three-place variants, some with an enclosed rear cabin. A float plane was also built.

Airplane U-2 was a single-engine, single bay biplane, constructed of a wire-braced wood framework, covered with fabric. There were ailerons on upper and lower wings. It was 8.170 meters (26 feet, 9.7 inches) long, with an upper wing span of 11.400 meters (37 feet, 4.8 inches), and lower span of 10.654 meters (34 feet, 10.9 inches). The wings’ chord was 1.650 meters (5 feet, 5 inches). The vertical gap between wings was 1.777 meters (5 feet, 10 inches), and the lower wing was staggered 0.800 meters (2 feet, 7.5 inches) behind the upper wing. The wings had 2° dihedral, and an angle of incidence of 2° 20′.

The U-2 was powered by a normally-aspirated, air-cooled, 8.590 liter (524.212-cubic-inch-displacement) Shvetsov M-11 five-cylinder radial engine, driving a two-bladed fixed-pitch wooden propeller. The engine produced 90 horsepower at 1,520–1,560 r.p.m.; 100 horsepower from 1,580–1,600 r.p.m.; and a maximum 110 horsepower at 1,650–1,670 r.p.m. The M-11 weighed 165 kilograms (364 pounds).

The U-2 was first armed in 1941. It could carry 350 kilograms (771 pounds) of bombs. A single 7.62×54mmR Shpitalny-Komaritskie (ShKAS) revolver machine gun was mounted in the rear cockpit.

The U-2 was redesignated Polikarpov Po-2 following the War. It was in production from 1928 to 1952. Sources vary as to the number built, ranging from 20,000 to 40,000.

Группа легких бомбардировщиков У-2 271-й ночной бомбардировочной авиационной дивизии летит на задание (“A group of U-2 light bombers of the 271st Night Bomber Aviation Division is flying on a mission.”)
Cemetery

© 2021, Bryan R. Swopes

22 February 1974

ALLEN, Barbara Ann, LTJG, USN, by Martin Blahove, 1974
Lieutenant (j.g.) Barbara Ann Allen, U.S. Navy. Oil on canvas, by Marcus Blahove, 1974. (National Naval Aviation Museum, LI2004.001.001)

22 February 1974: At Naval Air Station Corpus Christi, Texas, Lieutenant (Junior Grade) Barbara Ann Allen, United States Navy, received her Wings of Gold and designation as a Naval Aviator. She was the first woman to be so designated.

Barbara Ann Allen was born 20 August 1948 at Bethesda Naval Hospital, the third child of Bill Reed Allen, a U.S. Navy chief petty officer, and Marguerite Oleta Yates Allen. She attended Lakewood High School, Lakewood, California, graduating in 1966. She then studied at Long Beach City College where she was on the dean’s list for four consecutive semesters. She transferred to Whittier College, Whittier, California, where she graduated in 1969.

Miss Allen applied for and was accepted to the U.S. Navy Officer Candidate School at Newport, Rhode Island. On completion, she was commissioned as an Ensign, United States Naval Reserve, 18 December 1970.

Ensign Allen was assigned to at Amphibious Warfare Base, Little Creek, Virginia, followed by staff assignments at Atlantic Fleet headquarters, Norfolk, Virginia. She was promoted to lieutenant (junior grade), 18 March 1972. Lieutenant (j.g.) Allen was accepted for pilot training at NAS Pensacola, Florida, in February 1973.

Pensacola, Florida: The first four women chosen to undergo flight training. From left, LTJG. Barbara Allen of Chula Vista, California; ENS. Jane M. Skiles of Des Moines, Iowa; LTJG. Judith A. Neuffer of Wooster, Ohio; and ENS. Kathleen L. McNary of Plainfield, Illinois.
These are the first four women chosen to undergo U.S. Naval flight training. Left to right: Lieutenant (j.g.) Barbara Ann Allen, Ensign Jane M. Skiles, Lieutenant (j.g.) Judith A. Neuffer and Ensign Kathleen L. McNary. (U.S. Navy)

After completing 230 hours of flight training at Pensacola and NAS Corpus Christi, Lieutenant (j.g.) Allen received her pilot’s wings. She was assigned to Fleet Logistics Support Squadron THIRTY (VR-30), based at NAS Alameda, California, where she flew the Grumman C-1A Trader, a twin-engine Carrier On-Board Delivery (“COD”) transport. She also became the first woman in the Navy to qualify in a jet-powered aircraft, the North American Aviation T-39 Sabreliner.

A Grumman C-1A Trader, Bu. No. 146053, circa 1974. (U.S. Navy)
A Grumman C-1A Trader, Bu. No. 146053, circa 1974. (U.S. Navy)

On 6 April 1974, Barbara Ann Allen married Lieutenant (j.g.) John C. Rainey, U.S. Navy, at Los Angeles, California. Lieutenant Rainey was a 1972 graduate of the United States Naval Academy, whom Lieutenant Allen had met during flight training. They would have two daughters, Cynthia and Katherine.

Lieutenant (j.g.) Allen (now, Rainey) was promoted to lieutenant, 1 January 1975. In 1977, she transferred to Fleet Logistics Support Squadron FIFTY-THREE (VR-53) at Dallas, Texas, where she flew the four-engine Douglas C-118B Liftmaster.

A U.S. Navy Douglas C-118B Liftmaster, Bu. No. 131600, of VR-53, 1978. (Unattributed)
A U.S. Navy Douglas C-118B Liftmaster, Bu. No. 131600, of VR-53, 1978. (Unattributed)

When she became pregnant, Lieutenant Barbara Rainey was released from active duty on her request, 23 November 1977. There was considerable coverage in the news media on the adverse effects of pregnacy and child-rearing on the career of a female naval officers.

On 14 October 1981, Lieutenant Commander Barbara Ann Allen Rainey was recalled to active duty with the rank of lieutenant commander and assigned as a flight instructor with Training Squadron THREE (VT-3) at NAS Whiting Field, Florida.

This Beech T-34C Turbo Mentor, Bu. No. 160955, is the sister ship of the airplane in which LCDR Rainey and her student, ENS Knowlton, were killed, 13 July 1982. (Photograph © Andrew J. Muller. Used with permission.)
This Beech T-34C Turbo Mentor, Bu. No. 160953, is the sister ship of the airplane in which LCDR Rainey and her student, ENS Knowlton, were killed, 13 July 1982. (Photograph © Andrew J. Muller. Used with permission.)

At 10:20 a.m., 13 July 1982, while practicing touch-and-go landings at Middleton Field, Alabama, Lieutenant Commander Barbara Ann Rainey and her student, Ensign Donald B. Knowlton, were killed in a crash. While in the traffic pattern, their Beechcraft T-34C Turbo Mentor, a single-engine, two-place training airplane, Bu. No. 160955, suddenly banked to the right, lost altitude and crashed. The cause of the accident is unknown. It is attributed to pilot error, but the engine had been operating at reduced power and there may have been a “rollback” (an uncommanded deceleration).

A product liability lawsuit, Beech Aircraft Corporation v. Rainey, was decided in the plaintiff’s favor by the Supreme Court of the United States. [488 U.S. 153 (1988)]

Lieutenant Commander Barbara Ann Allen Rainey, United States Naval Reserve, was buried at Arlington National Cemetery, Arlington, Virginia.

Naval Aviator Wings

© 2025, Bryan R. Swopes

22 February 1928

Herbert John Louis Hinkler, AFC, DSM. (State Library of Queensland)
Herbert John Louis Hinkler, A.F.C., D.S.M. (State Library of Queensland)

22 February 1928: Herbert John Louis Hinkler arrived at Darwin, Northern Territories, Australia, after flying solo from Croydon, London, England. He had departed Croydon on 7 February, flying his Avro 581E Avian, G-EBOV. He had navigated by using a London Times atlas.

The previous record time for the 11,000 miles (18,000 kilometers) had been 28 days. An estimated 10,000 spectators watched his arrival.

The government of Australia awarded Bert Hinkler a prize of £2,000. He was appointed a squadron leader in the Royal Australian Air Force Reserve and awarded the Air Force Cross.

Herbert Hinkler, DSM, with his Avro 581E Avian, G-EBOV, before their departure from England, February 1928. (LIFE Magazine)
Herbert J. L. Hinkler, D.S.M., with his Avro 581E Avian, G-EBOV, before their departure from England, February 1928. (LIFE Magazine)
Petty Officer Herber J.L. Hinlker, RNAS, with No. 28 Squadron, 1918.
Petty Officer Herbert J. L. Hinkler, R.N.A.S., with No. 28 Squadron, 1918.

During World War I, Bert Hinkler had served as an aerial gunner in the Royal Naval Air Service. He served in France. He was trained as a pilot, serving in Italy with the Royal Air Force.

After the War, Hinkler went to work for A. V. Roe & Co.,, Ltd., where he was the Chief Test Pilot from 1921 to 1926. He then flew with England’s Schneider Trophy racing team.

Avro 581 Avian G-EBOV had been the prototype Avian. (Production Avians were designated 594.) The airplane had been successfully raced for several years in England before it was modified to the 581E standard for Hinkler’s flight to Australia. The airplane was powered by an 80 horsepower A.D.C. Aircraft Cirrus II engine.

Bert Hinkler was later the first pilot to fly an airplane solo across the South Atlantic Ocean. He was killed 7 January 1933 when he crashed into a mountain in Italy.

.Bert Hinkler arriving in Queensland, Australia with his Avro 581E Avian, G-EBOV, 1928.
Bert Hinkler arriving in Queensland, Australia with his Avro 581E Avian, G-EBOV, 1928.
Herbert J.L. Hinkler's Avro 581E Avian, G-EBOV, in the collection of the Queensland Museum South Bank, Corner of Grey & Melbourne Streets, South Bank, South Brisbane. (Detail from photograph by Peter Lewis)
Herbert J. L. Hinkler’s Avro 581E Avian, G-EBOV, in the collection of the Queensland Museum South Bank, Corner of Grey & Melbourne Streets, South Bank, South Brisbane. (Detail from photograph by Peter Lewis)

Hinkler’s airplane, G-EBOV, was the first A. V. Roe and Company, Limited, Avro 581 Avian prototype, c/n 5116. It received its Certificate of Registration 7 July 1926. The prototype was originally equipped with an air-cooled Armstrong Siddely Genet 5 cylinder radial engine. The radial engine was replaced with an A.D.C. Cirrus II inline 4-cylinder engine and the airplane was redesignated 581A.

The Avian was sold to Bert Hinkler and registered to him by the Air Ministry, 4 July 1927. G-EBOV received further modifications, including shortened wings, for Hinkler’s planned long distance flight. It was again redesignated, this time as 581E.

The A.D.C. Cirrus Mark II was an air-cooled, normally-aspirated 304.66-cubic-inch-displacement (4.993 liter) four-cylinder vertical inline engine. This was a right-hand tractor, direct-drive, overhead-valve engine with two valves per cylinder and a compression ratio of 4.9:1. It had a normal power rating of 75 horsepower at 1,800 r.p.m. and a maximum power rating of 80 horsepower at 2,000 r.p.m. The engine drove a two-bladed, fixed-pitch propeller. The Cirrus Mk.II was 3 feet, 9.3 inches (1.151 meters) long, 1 foot, 7 inches wide (0.483 meters) and 2 feet, 11.6 inches (0.904 meters) high. It weighed 280 pounds (127 kilograms).

© 2019, Bryan R. Swopes