Tag Archives: Browning Aircraft Machine Gun Caliber .50 AN-M3

17 March 1947

North American Aviation XB-45 45-59479 in flight. (U.S. Air Force 061020-F-1234S-013)

17 March 1947: The prototype of the United States’ first jet-powered bomber, the North American Aviation XB-45 Tornado, 45-59479, made a one-hour first flight at Muroc Army Air Field in the high desert of southern California (later known as Edwards Air Force Base), with company test pilot George William Krebs and flight engineer Paul W. Brewer.

The Valley Times reported:

Secret Jet Bomber in First Hop

     MUROC ARMY AIR FIELD, Calif., March 18—(AP)—America’s first bombing plane with four jet-propulsion engines—the B-45 which has been in secret production for many months—made an initial flight at this field yesterday.

     The sleek North American Aviation, Inc., plane, with a wing-spread of 89½ feet and a length of 141 feet, [sic] has lines resembling a fighter more than a bomber and was described by the Army Air Forces as having an “exceedingly high” speed.

     George Krebs, North American test pilot, flew the plane for its test, accompanied by Flight Engineer Paul W. Brewer.

     The B-45 is considerably smaller than the famed B-29 but company officials said it is a heavy bomber by World War II standards. The company said its range approximates that of earlier heavy bombers while carrying a “substantially” heavier load.

     The four General Electric J-35 jet engines are housed in pairs in single nacelles on each wing.

Valley Times, Vol. XI, No. 66,  Tuesday 18 March 1947, Page 16, Column 6

North American Aviation received a $73,900,000 contract to build 96 B-45s for the United States Army Air Forces within the next two years. They would be built by NAA in a leased portion of the Douglas Aircraft Company plant at Long Beach, California.

The photographs below show the XB-45 parked on Muroc Dry Lake. Notice that the windows over the bombardier’s compartment in the nose are painted on.

The North American Aviation XB-45 Tornado was a prototype four-engine bomber. It had a high-mounted straight wing and tricycle landing gear. It was 74 feet, 0 inches (22.555 meters) long with a wingspan of 89 feet, 6 inches (27.279 meters) and overall height of 25 feet, 2 inches (7.671 meters). It had an empty weight of 41,876 pounds (18,995 kilograms) and maximum takeoff weight of 82,600 pounds (37,467 kilograms).

North American Aviation XB-45 Tornado 45-59479 parked on the dry lake bed at Muroc Army Airfield, California. (U.S. Air Force 061020-F-1234S-015)
North American Aviation XB-45 Tornado 45-59479 parked on Muroc Dry Lake. (U.S. Air Force 061020-F-1234S-016)
North American Aviation XB-45 45-59479 makes a low pass over the runway. (U.S. Air Force 061020-F-1234S-018)

The three prototypes were powered by four Allison-built General Electric J35-A-4 turbojet engines, installed in nacelles which were flush with the bottom of the wings. The J35 was a single-shaft engine with an 11-stage axial-flow compressor section and a single-stage turbine. The J35-A-4 was rated at 4,000 pounds of thrust (14.79 kilonewtons). The engine’s maximum speed was 8,000 r.p.m. The J35 was 14 feet, 0 inches (4.267 meters) long, 3 feet, 4.0 inches (1.016 meters) in diameter, and weighed 2,400 pounds (1,089 kilograms).

The maximum speed of the XB-45 was 494 miles per hour (795 kilometers per hour) at Sea Level and 516 miles per hour (830 kilometers per hour) at 14,000 feet (4,267 meters). The service ceiling was 37,600 feet (11,461 meters).

North American Aviation XB-45 45-59479 as a test bed for rocket assisted take-off, 24 September 1958. Production B-45s could be equipped with two Aerojet XLR13-AJ-1 Assisted Take-Off rocket engines, producing 4,000 pounds (17.79 kilonewtons) of thrust for 60 seconds. (U.S. Air Force 061020-F-1234S-017)

The production B-45A Tornado, made its first flight 24 February 1948, when George Krebs and Nick Pickard flew it from the NAA plant at Long Beach Airport to Muroc Army Air Field. The duration of the flight was 1 hour, 4 minutes. It was heavier that the XB-45 and had better performance. It was operated by two pilots, a bombardier/navigator and a tail gunner. It was 75 feet, 4 inches (22.962 meters) long with a wingspan of 89 feet, 0 inches (27.127 meters) and overall height of 25 feet, 2 inches (7.671 meters).

The B-45A had a total wing area of 1,175 square feet (109.2 square meters). The leading edges were swept aft 3° 30′. Their angle of incidence was 3° with -3° 30′ twist and 1° dihedral.

The bomber’s empty weight was 45,694 pounds (20,726 kilograms) and maximum takeoff weight was 91,775 pounds (41,628 kilograms).

Cutaway illustration of the North American Aviation B-45 Tornado showing internal structure and arrangement. (U.S. Air Force 061020-F-1234S-019)

The B-45A was powered by four General Electric J47-GE-13 turbojet engines. The J47 was an axial-flow turbojet with a 12-stage compressor and single stage turbine. It had a normal power rating of 4,320 pounds of thrust (19.216 kilonewtons) at 7,370 r.p.m.; military power, 5,200 pounds (23.131 kilonewtons) at 7,950 r.p.m. (30-minute limit); and maximum power rating of 6,000 pounds(26.689 kilonewtons) at 7,950 r.p.m., with water/alcohol injection (5-minute limit). The engine was 12 feet, 0.0 inches (3.658 meters) long, 3 feet, 3.0 inches (0.991 meters) in diameter and weighed 2,525 pounds (1,145 kilograms).

The B-45A Tornado had a cruise speed of 393 knots (452 miles per hour/728 kilometers per hour), and maximum speed of 492 knots (566 miles per hour (911 kilometers per hour) at 4,000 feet (1,219 meters). Its service ceiling was 46,800 feet (14,265 meters) and it had a maximum range of 1,886 nautical miles (2,170 statute miles/3,493 kilometers). An auxiliary 1,200 gallon (4,543 liters) fuel tank could be installed in the bomb bay.

North American Aviation B-45A-5-NA Tornado 47-025 salvos a load of bombs. (U.S Air Force)

The bomb load was 22,000 pounds (9,979 kilograms). It was capable of carrying the M110 (T-14), the U.S. version of the RAF’s “Grand Slam” bomb.) Two Browning .50-caliber AN-M3  machine guns were mounted in the tail for defense, with 600 rounds of ammunition per gun.

41 B-45As were modified to the “Back Breaker” configuration, which enabled them to be armed with nuclear weapons.

The B-45 served with both the United States Air Force and the Royal Air Force (RB-45C reconnaissance variant). 143 were built, including the three XB-45 prototypes. They served with the United States Air Force until 1959.

An early production North American Aviation B-45A-1-NA Tornado, 47-011. (U.S. Air Force 061020-F-1234S-028)

On 20 September 1948, near Alpaugh, California, the first production B-45A-1-NA Tornado, 47-001, was put into a dive to test the airplane’s design load factor. During the dive, one of the engines exploded, which tore off several cowling panels. These hit the horizontal stabilizer, damaging it. The B-45 pitched up, and both wings failed due to the g load. The prototype had no ejection seats and test pilots George Krebs and Nicholas Gibbs Pickard, unable to escape, were both killed.

George William Krebs

George William Krebs was born in Kansas City, Missouri, 5 March 1918. He was the first of three children of William J. Krebs, an advertising executive, and Betty Schmitz Krebs. He attended Southwest High School, graduating in 1935.

Krebs studied at the Massachussetts Instititute of Technology (M.I.T.) at Cambridge, Massachussetts. He was a member of the Sigma Chi (ΣΧ) fraternity.

In 1940, Krebs was the owner of a Luscombe airplane distributorship in Kansas City. He had brown hair, blue eyes and a ruddy complexion. He was 5 feet, 9 inches tall (1.75 meters) and weighed 135 pounds (61 kilograms).

George Krebs married Miss Alice Bodman Neal at Kansas City, Missouri, 26 December 1942. They would have two children William and Charlotte.

During World War II, Krebs was employed as a test pilot at the North American Aviation, Inc., B-25 Mitchell medium bomber assembly plant at Kansas City, Kansas. Prior to taking over the XB-45 project, he was the chief test pilot at K.C.

North American Aviation B-25 Mitchell medium bombers near completion at the Kansas City, Kansas, bomber plant, circa 1944. (Alfred T. Palmer/U.S. Office of War Information)
Nicholas Gibbs Pickard

Nicholas Gibbs Pickard was born at Brooklyn, New York, 5 November 1916. He was the second of three children of Ward Wilson Pickard, a lawyer, and Alice Rossington Pickard.

During World War II, Pickard served as a ferry pilot for the Royal Air Force Transport Command.

On 21 January 1944, Captain Pickard married Miss Kathleen Baranovsky at Montreal, Quebec, Canada. They had two daughters, Sandra and Manya.

Following the war, Pickard was employed as a test pilot by North American Aviation.

Nicholas Gibbs Pickard was buried at the Pacific Crest Cemetery, Redondo Beach, California.

© 2025, Bryan R. Swopes

18 December 1972

TSGT Samuel O. Turner, U.S. Air Force, rests his hand on one of four air-cooled Browning AN-M3 .50-caliber aircraft machine guns of a B-52 tail turret. (“Bulldog Bulletin, Fall 1985”)

18 December 1972: On the first night of Operation Linebacker II, Staff Sergeant Samuel Olin Turner, United States Air Force, the gunner aboard Boeing B-52D-35-BW Stratofortress 56-676 (call sign “Brown 3”), saw a supersonic Mikoyan-Gurevich MiG 21 interceptor approaching the bomber from below and behind, with a second interceptor following at a distance.

As the Mach 2 fighter made a firing pass, Turner directed the four Browning AN-M3 .50-caliber machine guns of the bomber’s tail turret at the enemy fighter and opened fire. In a single 6–8 second burst, he expended 694 rounds of ammunition. He saw “a gigantic explosion to the rear of the aircraft.”

Master Sergeant Louis E. LeBlanc, the gunner on another B-52, “Brown 2,” had also seen the MiG 21 and confirmed Turner’s kill.

A Mikoyan-Gurevich MiG-21 interceptor at the National Museum of the United States Air Force, in the markings of the VPAF. (U.S. Air Force)

Staff Sergeant Turner was the first B-52 gunner to be officially credited with shooting down an enemy fighter, and the first aerial gunner to shoot down an enemy aircraft since the Korean War. He was awarded the Silver Star.

The citation reads,

Silver Star

Staff Sergent Samuel O. Turner distinguished himself by gallantry in connections with military operations against an opposing armed force as a B-52 Fire Control Operator near Hanoi, North Vietnam, on 18 December 1972. On this mission, Sergeant Turner’s aircraft was attacked by numerous enemy fighters. During these attacks he skillfully operated his gunnery radar equipment to train his guns on the attackers and destroyed one of them. By his courage in the face of hazardous combat conditions and outstanding professional skill, he successfully defended his aircraft and its crew and enabled it to complete its mission and return safely to base. By his gallantry and devotion to duty, Sergeant Turner has reflected great credit upon himself and to the United States Air Force.

Staff Sergeant Samuel O. Turner is awarded the Silver Star by General John C. Meyer, Commander in Chief, Strategic Air Command, for his actions in combat over Hanoi during Linebacker II. (U.S. Air Force)
The tail gun turret of B-52D 56-676. (U.S. Air Force)
The tail gun turret of Boeing B-52D Stratofortress 56-676. (U.S. Air Force)

Samuel Olin Turner was born at Atlanta, Georgia, 15 August 1942. He was the son of William Edgar Turner and Beatrice Honnicutt Turner. Sam Turner attended Russell High School at East Point, Georgia, then studied at David Lipscomb College, Nashville, Tennessee.

Turner enlisted in the United States Air Force, 13 January 1970, and was trained as a gunner on Boeing B-52s. He served in Southeast Asia for two years. In 1977, Technical Sergeant Turner transitioned to the B-52H Stratofortress, which was equipped with a remotely-operated M61A1 20 mm six-barreled rotary cannon.

The gunner’s position in the tail of a Boeing B-52D Stratofortress. (MSGT L. Emmett Lewis, U.S. Air Force/U.S. National Archives)

Senior Master Sergeant Samuel O. Turner was released from the U.S. Air Force 31 January 1982. In addition to the Silver Star, during his military career Turner had been awarded the Distinguished Flying Cross and a number of Air Medals. He died at Stockbridge, Georgia, 9 April 1985, at the age of 42 years.

The Samuel O. Turner Airman Leadership School at Ellsworth Air Force Base, near Rapid City, South Dakota, is named in his honor.

56-676 was the last Boeing B-52D Stratofortress in service. It is on display at Fairchild Air Force Base, Spokane, Washington.

A Boeing B-52D Stratofortress of the 307th Strategic Wing over Vietnam during Operation Linebacker II, December 1972. (U.S. Air Force)
A Boeing B-52D Stratofortress of the 307th Strategic Wing over Vietnam during Operation Linebacker II, December 1972. (U.S. Air Force)

© 2017, Bryan R. Swopes

8 November 1950

This painting by famed aviation artist Keith Ferris depicts 1st Lieutenant Russell Brown’s Lockheed F-80C Shooting Star as he shot down an enemy Mikoyan-Gurevich MiG 15 over Korea, 8 November 1950. (Keith Ferris)

8 November 1950: First Lieutenant Russell J. Brown, United States Air Force, 16th Fighter Interceptor Squadron, 51st Fighter Interceptor Wing, is credited with shooting down a Russian-built Mikoyan-Gurevich MiG 15 jet fighter near the Yalu River while flying a Lockheed F-80C-10-LO Shooting Star. This may have been the very first time that a jet fighter had been shot down by another jet fighter.

Sources vary, reporting the serial number of Lieutenant Brown’s fighter as 49-713 or 49-717.

A contemporary newspaper quoted Brown:

1st Lieutenant Russell J. Brown. (Air Force Times)

Brown gave a colorful description of the fight in history’s first jet-versus-jet battle last week. He said:

“We had just completed a strafing run on Sinuiju antiaircraft positions and were climbing when we got word that enemy jets were in the area.

“Then we saw them across the Yalu, doing acrobatics.

“Suddenly they came over at about 400 miles an hour. We were doing about 300. They broke formation right in front of us at about 18,000 or 20,000 feet. They were good looking planes—shiny and brand, spanking new.”

INS, Tokyo, November 13

Soviet records reported no MiG 15s lost on 8 November. Senior Lieutenant Kharitonov, 72nd Guards Fighter Aviation Unit, reported being attacked by an F-80 under circumstances that suggest this was the engagement reported by Lieutenant Brown, however Kharitonov succeeded in evading the American fighter after diving away and jettisoning his external fuel tanks.

A Soviet MiG 15 pilot, Lieutenant Khominich, also of the 72nd Guards, claimed shooting down an American F-80 on 1 November, but U.S. records indicate that this fighter had been destroyed by anti-aircraft fire.

What is clear is that air combat had entered the jet age, and that the Soviet Union was not only supplying its swept wing MiG 15 to North Korea and China, but that Soviet Air Force pilots were actively engaged in the war in Korea.

Russian technicians service a MiG-15bis o fteh 351st IAP at Antung Air Base, China, mid-1952. (Unattributed)
Russian technicians service a MiG 15bis of the 351st IAP at Antung Air Base, China, mid-1952. (Unattributed)

The Mikoyan-Gurevich MiG 15 is a single-seat, single engine turbojet-powered fighter interceptor, designed to attack heavy bombers. Designed for high sub-sonic speed, the leading edges of the wings and tail surfaces were swept to 35°. The wings were very thin to minimize aerodynamic drag.

The fighter was 10.102 meters (33 feet, 1.7 inches) long, with a wingspan of 10.085 meters (33 feet, 1 inch). Its empty weight was 3,253 kilograms (7,170 pounds) and takeoff weight was 4,963 kilograms (10,938 pounds).

The Rolls-Royce Nene I and Nene II jet engines had been used in the three MiG 15 prototypes. The British engines were reverse-engineered by Vladimir Yakovlevich Klimov and manufactured at Factory No. 45 in Moscow as the Klimov VK-1. The VK-1 used a single-stage centrifugal-flow compressor, 9 combustion chambers and a single-stage axial-flow turbine. It produced a maximum 26.5 kilonewtons of thrust (5,957 pounds of thrust). The VK-1 was 2.600 meters (8 feet, 6.4 inches) long, 1.300 meters (4 feet, 3.2 inches) in diameter, and weighed 872 kilograms (1,922 pounds).

The MiG 15 had a maximum speed of 1,031 kilometers per hour (557 knots/641 miles per hour) at 5,000 meters (16,400 feet) and 1,050 kilometers per hour (567 knots/652 miles per hour) at Sea Level.

Armament consisted of one Nudelman N-37 37 mm cannon and two  Nudelman-Rikhter NR-23 23 mm cannon.

MIG 15 Red 2057A Chinese Mikoyan-Gurevich MiG 15bis in a hangar at Kimpo Air Base, South Korea. A defecting North Korean pilot, Lieutenant No Kum-Sok flew it to Kimpo 1953. It was examined and test flown. This MiG 15 is in the collection of the National Museum of the United States Air Force, Wright-Patterson AFB, Ohio. (U.S. Air Force).
MIG 15 Red 2057. A North Korean Peoples’ Air Force Mikoyan-Gurevich MiG 15bis in a hangar at Kimpo Air Base, Republic of South Korea. A defecting North Korean pilot, Lieutenant No Kum-Sok, flew it to Kimpo on 21 September 1953. It was taken to Okinawa, examined and test flown by U.S.A.F. test pilots, including Major Charles E. (“Chuck”) Yeager. This MiG 15 is in the collection of the National Museum of the United States Air Force, Wright-Patterson AFB, Ohio. (U.S. Air Force).

The Lockheed P-80 Shooting Star was the United States’ first operational jet fighter. It was redesignated F-80 in 1948. It was a single-seat, single-engine airplane, designed by a team of engineers led by Clarence L. (“Kelly”) Johnson. The prototype XP-80A, 44-83020, nicknamed Lulu-Belle, was first flown by test pilot Tony LeVier at Muroc Army Air Field (now known as Edwards Air Force Base) 8 January 1944. The P-80A entered production in 1945. Improved versions, the P-80B and P-80C (F-80C) followed.

A Lockheed F-80C Shooting Star on display at the Air Force Armaments Museum, Eglin Air Force Base, Florida. The fighter is marked as F-80C-10-LO 49-713, 16th Fighter Squadron, 51st Fighter Interceptor Group, Kimpo, Korea, 1950.
Lockheed F-80C-10-LO Shooting Star 49-432 on display at the Air Force Armaments Museum, Eglin Air Force Base, Florida. The fighter is marked as F-80C-10-LO 49-713, assigned to the 16th Fighter Squadron, 51st Fighter Interceptor Group, Kimpo, Korea, 1950.

The F-80C was 34 feet, 5 inches (10.490 meters) long with a wingspan of 38 feet, 9 inches (11.811 meters) and an overall height of 11 feet, 3 inches (3.429 meters). It weighed 8,420 pounds empty (3,819 kilograms) and had a maximum takeoff weight of 16,856 pounds (7,645 kilograms).

The F-80C was powered by either a General Electric J33-GE-11, Allison J33-A-23 or J33-A-35 turbojet engine. The J33 was a development of an earlier Frank Whittle-designed turbojet. It used a single-stage centrifugal-flow compressor, eleven combustion chambers and a single-stage axial-flow turbine section. The J33-A-35 had a Normal Power rating of 3,900 pounds of thrust (17.348 kilonewtons) at 11,000 r.p.m., at Sea Level, and 4,600 pounds (20.462 kilonewtons) at 11,500 r.p.m., for Takeoff.  It was 107 inches (2.718  meters) long, 50.5 inches (1.283 meters) in diameter, and weighed 1,820 pounds (826 kilograms).

The F-80C had a maximum speed of 594 miles per hour (516 knots/956 kilometers per hour) at Sea Level and 543 miles per hour (472 knots/874 kilometers per hour) at 25,000 feet (7,620 meters). The service ceiling was 46,800 feet (14,265 meters). The maximum range was 1,380 miles (2,221 kilometers).

The F-80C Shooting Star was armed with six Browning AN-M3 .50-caliber aircraft machine guns mounted in the nose.

A Lockheed F-80C Shooting Star of the 16th Fighter Interceptor Squadron, 51st Fighter Interceptor Wing, makes a JATO-assisted takeoff from an airfield in the Republic of South Korea, circa 1950. (U.S. Air Force)

Lockheed F-80C-10-LO Shooting Star 49-713, flown by Albert C. Ware, Jr., was lost 10 miles north of Tsuiki Air Base, Japan, 23 March 1951.

© 2017, Bryan R. Swopes

26 September 1949

XT-28 48-1471 landing at Edwards AFB 3 Feb 1950
The first of two North American Aviation  XT-28 prototypes, 48-1371, lands at Edwards Air Force Base 3 February 1950. (U.S. Air Force)

26 September 1949: At Vultee Field, a private industrial airport in Downey, California, North American Aviation test pilot Jean LeRoy (“Skip”) Ziegler ¹ took the first of two prototype military flight trainers, the XT-28 (NAA Model 159–2), U.S. Air Force serial number 49-1371, for its first flight. The 45-minute flight was two weeks ahead of schedule.

The Long Beach Press-Telegram reported:

New Training Plane Tested

     LOS ANGELES, Sept 27. (AP) The Air Force’s first postwar training plane—North American’s T-28—has tried her wings and found they work very well.

     The company announced that the twin cockpit craft—designed to train pilots for advanced high speed fighters and bombers—flew 45 minutes yesterday. Said test pilot Skip Ziegler, “It handles more like a fighter than a trainer.” He termed the flight, “completely satisfactory.”

     The T-28 has a ceiling of 29,800 feet and can move 288 miles an hour. The T-6, present Air Force trainer, ceilings at 22,000 and travels 205 m.p.h. top.

Long Beach Press Telegram, Vol. LXII, No. 240, Tuesday, 27 September 1949, Page A-5, Column 1

One of the two North American Aviation XSN2J-1 prototypes in flight of the Southern California shoreline, circa 1946. (North American Aviation, Inc./San Diego Air & Space Museum Archives, Catalog #: 00033269)

The XT-28 was developed from an earlier North American Aviation project for the United States Navy. In 1946, NAA proposed their Model 142, as a replacement for the World War II SNJ/T-6 Texan, a trainer which had also been built by North American, and used by  both the Navy and the U.S. Army Air Forces. The Navy designated the proposed airplane XSN2J-1. Two were built and assigned Bureau of Aeronautics serial numbers (“Bu. No.”) 121449 and 121450. 121449 was the first to fly, 15 February 1947.

The Navy tested both aircraft, but did not order them into production.

One of the two North American Aviation XSN2J-1 prototypes during testing at NATC Patuxent River, Maryland, October 1948. The prototype is armed with with five-inch air-to-surface rockets. (National Archives and Records Administration)

A year later, NAA made a similar proposal to the United States Air Force. The Air Force wanted a trainer to transition pilots into turbojet-powered aircraft. Similar to the XSN2J-1, the XBT-28 was changed to tricycle landing gear, a first for a miltiary trainer. The prototype’s two cockpits were laid out very similar to the new, swept-wing North American XP-86 Sabre. The Air Force ordered the airplane into production as the T-28A. The first T-28A arrived at Eglin Air Force Base, Florida, 15 June 1950, where it would tested for suitability as a flight trainer.

Prototype North American Aviation XBT-28. (T-28 Trojan Foundation)

The North American Aviation T-28 Trojan is an all-metal, two-place airplane with retractable tricycle landing gear. The dual cockpits are arranged in tandem. The T-28A was used by the United States Air Force as a primary training aircraft, while the more powerful T-28B and T-28C were employed by the U.S. Navy. The airplane was noted for its stability and handling qualities, its easy recovery from stalls and spins, and its excellent visibility.

Initially, the T-28 was built at North American Aviation’s Downey Division, in Downey, California, which at the time was primarily a farming community about 13 miles (21 kilometers) south of downtown Los Angeles, California. Production was shifted to North America’s Columbus Division in Columbus, Ohio.

North American Aviation T-28A Trojan internal arrangement. (U.S. Air Force)

The XT-28 and production T-28As were 32.0 feet (9.754) long with a wingspan of 40.6 feet (12.375 meters), and overall height of 12.7 feet (3.871 meters). The wing had an angle of incidence of 2° with 3° of negative twist, and 8° dihedral. The total wing area was 268.0 square feet (24.9 square meters). The vertical fin was offset 1° to the left of the airplane’s centerline. The prototype and early production T-28As had an empty weight of had an empty weight of 6,909 pounds (2,998 kilograms). This was increased in later aircraft to 7,282 pounds (3,303 kilograms). The Maximum Takeoff Weight (MTOW) was 7,751 pounds (3,516 kilograms).² The two prototypes had a belly-mounted speed brake. All T-28As had provisions for this installation.

North American Aviation XT-28 three-view illustration with dimensions. (U.S. Air Force)

The XT-28 and production T-28A were powered by an air-cooled, supercharged, 1,301.868 cubic inch (21.334 liter) Wright Aeronautical Division Cyclone 7 R-1300-1 (853C7BA1) 7-cylinder radial engine with a compression ratio of 6.2:1. This engine required 91/98 octane aviation gasoline. It was rated at 700 horsepower at 2,400 r.p.m., and 800 horsepower at 2,600. r.p.m. for takeoff. The engine also produced some jet thrust from its exhaust system. The engine thrust line was angled downward 5° from fuselage reference line. The R-1300-1 drove a two blade, 10 foot, 0 inch (3.048 meters) diameter Aeroproducts hydraulic variable pitch propeller through 0.5625:1 gear reduction. The engine was 4 feet, 1.12 inches (1.248 meters) long, 4 feet, 2.45 inches (1.281 meters) in diameter, and weighed 1,065 pounds, (483 kilograms).

The XT-28 had a maximum fuel capacity of 125 gallons (473 liters), carried in two wing tanks. Two additional tanks were added to later production T-28As, increasing the capacity to 177 gallons (670 liters).

The T-28A had a cruise speed of 165 knots (190 miles per hour/306 kilometers per hour, and maximum speed of 247 knots (284 miles per hour/457 kilometers per hour) at 5,800 feet (1,768 meters). VNE varied from 190 knots (219 miles per hour/352 kilometers per hour) at 25,000 feet (7,620 meters) with external load, to 340 knots (391 miles per hour/630 kilometers per hour) at Sea Level, clean. The airplane’s best power off glide speed was 105 knots (120 miles per hour/194 kilometers per hour).

The T-28A could climb at a maximum rate of 1,870 feet per minute (9.5 meters per second). Its service ceiling was 24,000 feet (7,315 meters). The maximum range was 720 nautical miles (829 statute miles/1333 kilometers) in early production models, or 880 nautical miles (1,013 statute miles/1,630 kilometers) in aircraft with increased fuel capacity.

For training purposes, the T-28A could be armed with one detachable gun pod under each wing. Each pod contained a .50-caliber AN-M3 Browning Aircraft Machine Gun. These had a rate of fire of approximately 1,100 rounds per minute. Each gun was supplied with 100 rounds of ammunition. The trainer could also be equipped with a removable bomb rack for a 100-pound (45 kilogram) bomb. Three 2.25 inch (5.7 centimeters) Sub-Caliber Aerial Rocket (SCAR)—Rocket, 2.25-Inch Practice—rockets could be carried on pylons mounted to hardpoints under each wing.

The first production North American T-28A Trojan, 49-1494 (North American serial number 159-1), at the National Museum of the United States Air Force. Delivered to Wright-Patterson AFB, this aircraft was used as a static test airframe. (U.S. Air Force 050322-F-1234P-020)

A total of 1,948 T-28s were built from 1950 to 1957. 1,194 of these were T-28As. The Air Force retired its T-28As by 1959. Many USAF T-28As were pulled from storage at Davis-Monthan Air Force Base, Tucson, Arizona, and were converted to the T-28D configuration for combat operations during the Vietnam War. Others were converted to the AT-28D attack variant, which included an ejection seat.

North American Aviation test pilot Robert A. (“Bob”) Hoover, with a U.S. Navy T-28B Trojan, circa 1953. (National Museum of Naval Aviation)

XT-28 48-1371 was sent to “The Boneyard” at Davis-Monthan Air Force Base near Tucson, Arizona, 23 January 1961, and to reclamation, 18 June 1965. In 1974, it was observed, disassembled, at the Hamilton Aviation Company yard in Tucson. (Hamilton produced modified T-28s: the military T-28R-1, and the civilian T-28R-2 Nomair.)

¹ For biographical information about Skip Ziegler, please see “This Day in Aviation” for 12 Nay 1953 at: https://www.thisdayinaviation.com/12-may-1953/

© 2025, Bryan R. Swopes

15 September 1948

Major Richard L. Johnson, United States Air Force.
Major Richard Lowe Johnson, United States Air Force. (Unattributed)
Major Richard L. Johnson with the record-setting North American Aviation F-86A Sabre.
Major Richard L. Johnson with the record-setting North American Aviation F-86A Sabre. (Unattributed)

15 September 1948: Major Richard L. Johnson, U.S. Air Force, Air Materiel Command, set a new Fédération Aéronautique Internationale (FAI) World Record Speed Over a 3 Kilometer Course,¹ flying the sixth production North American Aviation F-86A-1-NA Sabre, serial number 47-611, at Muroc Air Force Base, California (renamed Edwards AFB in 1949).

The air temperature was 70° F. (21° C.) with very little wind. Making four consecutive passes at an altitude of 75–125 feet (23 to 38 meters), the Sabre averaged 1,079.84 kilometers per hour (670.98 miles per hour) — 0.889 Mach. The slowest pass was 669.830 miles per hour and the fastest was 672.762 miles per hour (1,077.987 and 1,082.705 kilometers per hour, respectively) — 0.8875–0.8914 Mach.

This was Major Lowe’s second attempt for the speed record. At the National Air Races in Cleveland, Ohio, on 5 September, official timers clocked the wrong airplane, and then on a repeat pass, a timing camera jammed. During that attempt, Major Johnson flew under a light airplane which had wandered onto the course, missing it by about ten feet (3 meters).

Major Richard L Johnson, USAF with F-86A-1-NA 47-611 and others at Muroc AFB, 15 September 1948. Note the gun port doors on this early production aircraft. They opened in 1/20 second as the trigger was pressed. Proper adjustment was complex and they were soon eliminated. (Image from F-86 SABRE, by Maurice Allward, Charles Scribner’s Sons, New York, 1978, Chapter 3 at Page 24.)
Major Richard L. Johnson, USAF with F-86A-1-NA Sabre 47-611 and others at Muroc AFB, 15 September 1948. Note the gun port doors on this early production aircraft. They opened in 1/20 second as the trigger was pressed. Proper adjustment was complex and they were soon eliminated. (Image from F-86 Sabre, by Maurice Allward, Charles Scribner’s Sons, New York, 1978, Chapter 3 at Page 24.)
The De la Vaulx Medal.

Major Johnson was awarded the De la Vaulx Medal by the Fédération Aéronautique Internationale.

North American Aviation claimed that any F-86 coming off the assembly line could beat this world record speed. This record stood until 1952 when it was broken by an F-86D Sabre.

The Associated Press reported:

Air Force Tells Of New Speed

     NEW YORK(AP) — The Air Force announced Saturday a new world speed record of 670.981 miles an hour, made with a fully armed standard jet fighter, the North American F-86.

     The mark was set Wednesday. It is 20 miles an hour faster than the record set in August, 1947, by a Navy research plane, the Douglas D-558.

     It was the first world speed mark in history for a production model aircraft ready to fight.

     The pilot was Maj. Richard L. Johnson, slender quiet-spoken test flier for the Air Material Command at Wright-Patterson Airbase near Dayton Ohio. He flew the course at Muroc Lake, Calif., where the record was raised three times last year.

     Gen. Hoyt S. Vandenberg, Air Force chief of staff, announced the new mark at Mitchel Field, Long Island, where he participated in one of the numerous shows being held in observance of the first anniversary of the Air Force.

Eugene Register-Guard, Saturday, 18 September 1948, Page 1, Column 7.

Major Johnson had made a previous speed record attempt flying a different Sabre, but due to a technical problem with the timing equipment, that attempt was disqualified.

47-605 was the first production F-86A-1-NA Sabre. (U.S. Air Force)
F-86A-1-NA 47-605 was the first production Sabre. It first flew on 20 May 1948. (U.S. Air Force)

47-611 was from the first production block of thirty-three F-86A-1-NA Sabres (originally designated P-86A) and was built at North American Aviation’s Inglewood, California, plant. Its NAA serial number was 151-38438. The airplane was withdrawn from service 16 November 1955 and assigned as a ground trainer for the California Air National Guard at Van Nuys, California.

The F-86A was a single-seat, single-engine, swept-wing day fighter, powered by a turbojet engine. The airplane’s design team was headed by Edgar Schmued, who was also responsible for North American’s legendary P-51 Mustang of World War II.

The F-86A had the same dimensions as the prototype XP-86 which had first flown almost two years earlier. The F-86A was 37 feet, 6.6 inches (11.445 meters) long with a wingspan of 37 feet, 1.4 inches (11.313 meters) and overall height of 14 feet, 8.9 inches (4.493 meters). It had an empty weight of 10,093 pounds (4,578 kilograms) and the maximum takeoff weight was 15,876 pounds (7,201 kilograms).

North American Aviation F-86A-1-NA Sabre 47-605, the first production aircraft. (U.S. Air Force)
North American Aviation F-86A-1-NA Sabre 47-605, the first production aircraft. (U.S. Air Force)

The F-86 wings’ leading edges were swept to 35° and included leading edge slats, which automatically extended at low speed to provide an increase in lift.

The F-86A was initially powered by a General Electric TG-190A (J47-GE-1) turbojet engine. This was a major improvement over the Chevrolet-built J35-C-3 that had powered the prototype, and it produced almost 25% greater thrust. The J47-GE-1 was rated at 4,850 pounds of thrust (21.57 kilonewtons), or 5,820 pounds (25.89 kilonewtons) with water injection. The J47 was an axial-flow turbojet with a 12-stage compressor, eight combustion chambers, and single-stage turbine. The engine was 12 feet, 0.0 inches (3.658 meters) long, 3 feet, 3.0 inches (0.991 meters) in diameter and weighed 2,475 pounds (1,123 kilograms).

Early in F-86A production, the engine was standardized with the J47-GE-13, which was rated at 5,200 pounds of thrust (23.13 kilonewtons) and 6,000 pounds (26.69 kilonewtons) “wet.” The -13 had the same exterior dimensions as the -1 engine, but weighed 50 pounds (23 kilograms) more.

North American Aviation F-86-A-NA Sabre 47-630. (North American Aviation, Inc./Chicago Tribune)
North American Aviation F-86A-1-NA Sabre 47-630. (North American Aviation, Inc.)

The F-86A had a maximum speed of 679 miles per hour (1,093 kilometers per hour) at Sea Level, and 601 miles per hour (967 kilometers per hour) at 35,000 feet (10,668 meters). The service ceiling as 48,000 feet (14,630 meters) and it could climb to 40,000 feet (12,192 meters) in 10 minutes, 24 seconds. It had a range of 1,200 miles (1,931 kilometers).

This photograph of a Canadair CL-13 Sabre, a license-built F-86E, shows the firepower of the six .50-caliber machine guns placed close together in the airplane's nose. The smoke trails show the spin of the bullets caused by the gun barrels' rifling. (Royal Canadian Air Force)
This photograph of a Canadair CL-13 Sabre (a license-built F-86E) test-firing its guns shows the firepower of the six .50-caliber machine guns placed close together in the airplane’s nose. The smoke trails show the spin of the bullets caused by the gun barrels’ rifling. The total rate of fire is approximately 7,200 rounds per minute. (Royal Canadian Air Force)

Designed as a day fighter, the F-86 Sabre was armed with six air-cooled Browning AN-M3 .50-caliber aircraft machine guns with 267 rounds of ammunition per gun. These guns had a rate of fire of 1,200 rounds per minute. The F-86A-1-NA had electrically-actuated doors covering the gun ports to maintain the aerodynamically clean surface. Because of their complexity, these doors were deleted beginning with the F-86A-5-NA aircraft.

The fighter could also carry bombs or rockets.

In this photograph, the record-settining North American Aviation F-86A Sabre, 47-611, is seen suspended from a crane while it conducts armament tests. It has just launched a 5-inch High Velocity Aerial Rocket. (U.S. Air Force)

Richard Lowe Johnson ² was born at Cooperstown, North Dakota, 21 September 1917. He was the eighth of nine children of Swedish immigrants, John N. Johnson, a farmer, and Elna Kristina Helgesten Johnson, a seamstress.

Dick Johnson attended Oregon State College at Corvallis, Oregon, as a member of the Class of 1943. He was a member of the Sigma Alpha Epsilon (ΣΑΕ) fraternity.

Dick Johnson was a pitcher for the college baseball team, and later, played for the Boston Red Sox “farm” (minor league) system.

On 18 June 1942, Johnson enlisted as a private in the Air Corps, United States Army. On 5 November, he was appointed an aviation cadet and assigned to flight training.

Aviation Cadet Johnson married Miss Juanita Blanche Carter, 17 April 1943, at Ocala, Florida. The civil ceremony was officiated by Judge D. R. Smith.

After completing  flight training, on 1 October 1943, Richard L. Johnson was commissioned as a second lieutenant, Army of the United States (A.U.S.).

Lieutenant Johnson was assigned to the 66th Fighter Squadron, 57th Fighter Group, Twelfth Air Force, in North Africa, Corsica, and Italy, flying the Republic P-47 Thunderbolt. He was promoted to first lieutenant, A.U.S., 9 August 1944, and just over three months later, 26 November 1944, to the rank of captain, A.U.S. On 14 May 1945, Captain Johnson was promoted to the rank of major, A.U.S. (Major Johnson was assigned a permanent rank of first lieutenant, Air Corps, United States Army, on 5 July 1946, with a date of rank retroactive to 21 September 1945.)

Republic P-47D-25-RE Thunderbolt 42-26421, assigned to the 66th Fighter Squadron, 57th Fighter group, Twelfth Air Force. This airplane was purchased by the employees of Republic Aviation. (American Air Museum in Britain UPL 25505)

During World War II, Major Johnson flew 180 combat missions with the 66th Fighter Squadron. He is officially credited with one air-to-air victory, 1 July 1944. Johnson was awarded the Silver Star, the Distinguished Flying Cross with two oak leaf clusters (3 awards), and the Air Medal with twelve oak leaf clusters (thirteen awards).

In 1946, was assigned to the Air Materiel Command Engineering Test Pilot School at the Army Air Forces Technical Base, Dayton, Ohio (Wright-Patterson Air Force Base). He was the second U.S. Air Force pilot to be publicly acknowledged for breaking the “sound barrier.”

A few weeks after arriving at Dayton, Major Johnson met Miss Alvina Conway Huester, the daughter of an officer in the U.S. Navy. Dick Johnson and his wife Juanita were divorced 8 January 1947, and he married Miss Huester in a ceremony in Henry County, Indiana, 10 January 1947. They would have three children, Kristie, Lisa and Richard.

During the Korean War, Major Johnson was sent to the war zone to supervise field installations of improvements to the F-86 Sabre. He was “caught” flying “unauthorized” combat missions and was sent home.

Lieutenant Colonel Johnson resigned from the Air Force in 1953 to become the Chief Test Pilot for the Convair Division of General Dynamics. He made the first flights of the YF-102 on 24 October 1953, the F-106A Delta Dart, 26 December 1956. He made the first flight of the F-111 on 21 December 1964.

Chief Test Pilot Dick Johnson in the cockpit of a Convair B-58A Hustler, a Mach 2 strategic bomber. (Courtesy if Neil Corbett, Test and Research Pilots, Flight Test Engineers)

in 1955, Johnson was one of the six founding members of the Society of Experimental test Pilots.

Dick Johnson was Chief Engineering Test Pilot for the General Dynamics F-111 “Aardvark.” In 1967, the Society of Experimental Test Pilots awarded Johnson its Iven C. Kincheloe Award for his work on the F-111 program. In 1977, Dick Johnson, now the Director of Flight and Quality Assurance at General Dynamics, retired.

In 1998, Dick Johnson was inducted into the Aerospace Walk of Honor at Lancaster, California. His commemorative monument is located in front of the Lancaster Public Library on W. Lancaster Boulevard, just West of Cedar Avenue. ³

Lieutenant Colonel Richard Lowe Johnson, United States Air Force, (Retired), died 9 November 2002 at Fort Worth, Texas. He was buried at Arlington National Cemetery, Arlington, Virginia, on 7 January 2003.

Richard L. Johnson waves from the cockpit of the record-setting North American Aviation F-86A-1-NA Sabre, 47-611.

¹ FAI Record File Number 9866

² Several sources spell Johnson’s middle name as “Loe.”

³ Various Internet sources repeat the statement that “Richard Johnson has been honored with. . . the Thompson Trophy, Mackay Trophy, Flying Tiger Trophy, Federation Aeronautique Internationale Gold Medal and Golden Plate Award of the American Academy of Achievement. . . .” TDiA has checked the lists of awardees of each of the appropriate organizations and has not found any support for the statement.

© 2018, Bryan R. Swopes