XB-70A-2-NA Valkyrie 62-0207 leading a formation of aircraft powered by General Electric engines. Joe Walker’s F-104 is just below the B-70’s right wing tip. (U.S. Air Force)
8 June 1966: During a publicity photo formation flight, a Lockheed F-104N Starfighter, N813NA, flown by NASA Chief Research Test Pilot Joseph A. Walker, was caught in the wingtip vortices of the North American Aviation XB-70A-2 Valkyrie, 62-0207, the second prototype Mach 3+ strategic bomber. The Starfighter rolled up and across the Valkyrie. The two airplanes collided, with the F-104 taking off the Valkyrie’s vertical fins, then exploding.
Lockheed F-104N N813NA collided with North American Aviation XB-70A-2 Valkyrie 62-0207 and exploded, 8 June 1966. (U.S. Air Force)
The Valkyrie continued to fly straight and level for 16 seconds before it began to roll inverted. The B-70’s pilot, Alvin S. White, was able to eject, though he was severely injured. Joe Walker and B-70 co-pilot Major Carl S. Cross, United States Air Force, were killed.
The B-70 is out of control and going down in this photograph. A large section of the left wing is missing. JP-8 fuel is spraying out of damaged tanks. (U.S. Air Force)
Still photographs and motion picture film of the formation were being taken from Clay Lacy’s Gates Lear Jet. The photos were for a General Electric publicity campaign showing U.S. military aircraft that were powered by GE engines. Air Force procedures for requesting and approval of publicity flights were not properly followed and it is likely this flight would not have been approved had they been.
The XB-70A-2 Valkyrie has rolled inverted and pitched nose down. The outer section of the left wing is missing. The trailing edge and tip tank of the Lear Jet photo plane’s right wing are in the foreground. (U.S. Air Force)
Reportedly, just prior to the collision, Walker radioed, “I’m opposing this mission. It is too turbulent and it has no scientific value.”
The wreckage of the North American Aviation XB-70A-2 Valkyrie 62-0207 burns on the desert floor at N. 35° 03′ 47″, W. 117° 01′ 27″, north of Barstow, California, 8 June 1966. (U.S. Air Force)
5 June 1968: Lockheed A-12 60-6932 (Article 129) was lost during a functional check flight following the change of its right engine. The Mach 3 reconaissance aircraft had taken off from Kadena Air Base, Okinawa. Central Intelligence Agency Pilot Jack Warren Weeks, call sign “Dutch 29,” was killed.
“Weeks’ mission started off with a top-off refueling, then the test hop route dictated by weather conditions. The climb-out and start of the turn back North apparently went as planned. Then the on-board telemetry system (Birdwatcher) started sending downlinks indicating the right engine was overtemping, followed by low fuel flow signals and finally that the altitude was below 70,000? approximately. Then all signals from Article 129 ceased and it was presumed that the airplane was down. Intensive searches failed to show any sign of the airplane or its pilot. The ensuing accident board concluded that the most likely cause of the loss of the airplane was catastrophic failure of the right engine.” —Roadrunners Internationale
The remaining eight A-12s were retired in favor of the new U.S. Air Force Lockheed SR-71A. Thirteen A-12s had been built by Lockheed. Four had previously been lost. The final flight of a Lockheed A-12 took place 21 June 1968, when it flew from Area 51 in Nevada, to Palmdale, California.
Jack Warren Weeks was born 23 February 1933 at Birmingham, Alabama. He was the first of two children of Nathan Malcolm Weeks, a dry cleaning salesman, and Abbie Ellen Kearney Weeks.
Weeks attended the University of Alabama at Tuscaloosa from 1951 to 1955, where he majored in physics. He was a member of the Reserve Officers Training Program (ROTC), the Delta Chi (ΔΧ) and Sigma Pic Sigma (ΣΠΣ) fraternities.
Jack W. Weeks (1952 Corolla)Mrs. Jack Warren Weeks (The Birmingham News)
Jack Weeks married Miss Sharlene Thera Fenn, 5 September 1953, at the West End Baptist Church, in Birmingham, Alabama. The ceremony was presided over by Rev. James H. Butler. They would have four children.
Weeks graduated in May 1955 with a bachelor of science degree. He was commissioned as a second lieutenant, United States Air Force Reserve (USAFR).
Lieutenant Weeks served with the 22 Fighter Day Squadron at Bitburg Air Base, Germany, from April 1957 to April 1960. (On 15 May 1958 the squadron was redesignated 22nd Tactical fighter Squadron.) The unit flew North American F-100 Super Sabres. On 3 August 1958, Weeks was promoted to first lieutenant.
North American Aviation F-100C-20-NA Super Sabre 54-1941, 22nd Fighter Day Squadron, at Bitburg Air Base, Germany. (U.S. Air Force)
From April 1960 to February 1963, 1st Lieutenant Weeks was assigned to the 4520th Combat Crew Training Wing at Nellis Air Force Base, Las Vegas, Nevada.
Jack Weeks was recruited by the Central Intelligence Agency (CIA), and from 1963 to1968 he worked as an experimental test pilot on the Lockheed A-12. He and his family lived in resided in Canoga Park, California.
Weeks also flew the A-12 on flew reconnaissance missions over Southeast Asia during the Vietnam War (Operation Black Shield), and over the Democratic people’s Republic Korea (North Korea), during the Pueblo Incident. (Weeks’ obituary said that he was a consultant for Hughes Aircraft, and that he was performing equipment calibrations at Okinawa.)
The Central Intelligence Agency posthumously awarded Jack Warren Weeks its Intelligence Star for Courageous Action, 17 May 1968. The award was presented to Mrs. Weeks.
Central Intelligence Agency A-12 pilot Jack Warren Weeks, circa 1963. (CIA)
The Lockheed A-12 was a top secret reconnaissance airplane built for the Central Intelligence Agency under the code name “Oxcart.” It was the replacement for the Agency’s high-flying but subsonic U-2 spy plane which had become vulnerable to radar-guided surface-to-air missiles. It was a single-place, twin-engine hypersonic reconnaisance aircraft. The A-12 could fly faster than Mach 3 and higher than 80,000 feet—so fast and so high that no missile could reach it. By the time missile site radar locked on to an A-12 and a missile was prepared to fire, the Oxcart had already flown beyond the missile’s range. It was 101.6 feet (30.97 meters) long, with a wingspan of 55.62 feet (16.95 meters) and overall height of 18.45 feet (5.62 meters). It had an empty weight of 54,600 pounds (24,766 kilograms) and maximum gross weight of 124,600 pounds (57,878 kilograms).
The A-12 was powered by two Pratt & Whitney JT11D-20 (J58-P-4) turbo-ramjet engines, rated at 25,000 pounds of thrust (111.21 kilonewtons) and 34,000 pounds of thrust (151.24 kilonewtons) with afterburner. The exhaust gas temperature is approximately 3,400 °F. (1,870 °C.). The J58 is a single-spool, axial-flow engine which uses a 9-stage compressor section and 2
-stage turbine. The J58 is 17 feet, 10 inches (7.436 meters) long and 4 feet, 9 inches (1.448 meters) in diameter. It weighs approximately 6,000 pounds (2,722 kilograms).
The A-12’s speed was Mach 3.2 (2,125 miles per hour/3,118 kilometers per hour) at 75,000 feet(22,860 meters). Its cruise altitude was 84,500–97,600 feet (25,756–29,748 meters). The range was 4,210 nautical miles (4,845 miles/7,797 kilometers)
The A-12 was equipped with a Perkin-Elmer Type I stereo camera. With its 5,000-foot (1,524 meters) film supply, produced pairs of photographs covering a 71-mile (114 kilometers) swath with ground resolution of 12 inches (30.48 centimeters). Kodak Type II stereo camera, 8,400 foot (2,560 meters) film supply, 60-mile (97 kilometers) swath, 17-inch (43 centimeters) resolution. Hycon Type IV, 12,000-foot (3,658 meters) film supply, 41-mile (66 kilometers) swath with resolution of 8 inches (20 centimeters).
Article 129 was the ninth of thirteen A-12s built by Lockheed’s “Skunk Works.” They were operational from 1964 to 1968, when they were phased out in favor of the U.S. Air Force two-man Lockheed SR-71A “Blackbird.”
Lockheed A-12 Oxcarts and YF-12As at Groom Lake, Nevada. (Central Intelligence Agency)
5 June 1948: Flying at 40,000 feet (12,192 meters), north of Muroc Air Force Base, California, the second Northrop YB-49 “flying wing,” serial number 42-102368, was undergoing stall recovery performance testing with a crew of five aboard. The pilot was Major Daniel A. Forbes, Jr., United States Air Force, and the co-pilot was Captain Glen W. Edwards.
The aircraft suffered a catastrophic structural failure with the outer wing panels tearing off. The experimental airplane crashed approximately 10 miles (16 kilometers) east of the small desert town of Mojave. The entire crew, which included 1st Lieutenant Edward L. Swindell, flight engineer, and civilian engineers Charles H. LaFountain and Clare C. Lesser, were killed.
Northrop YRB-49A 42-102369, the sole six-engine reconnaissance prototype. Note the engine mounted in a pod below the wing’s leading edge. (U.S. Air Force)
The YB-49 was an experimental jet engine-powered bomber, modified from a propeller-driven Northrop XB-35. It was hoped that the all-wing design would result in a highly efficient airplane because of its very low drag characteristics. However, the design could be unstable under various flight conditions.
A few months after the crash, the first YB-49 was destroyed in a taxiing accident and the project cancelled. It would be 41 years before the concept would be successful with the Northrop B-2 Spirit.
Northrop YB-49 42-102367. (U.S. Air Force)
42-102367 had been converted from the second YB-35 pre-production test aircraft. The original Flying Wing’s four Pratt & Whitney Wasp Major (R-4360-21) radial engines were replaced by eight Allison J35-A-15 turbojet engines and several aerodynamic improvements were made. The change to jet power increased the airplane’s speed by about 100 miles per hour (161 kilometers per hour) and significantly reduced the vibrations caused by the reciprocating engines, drive shafts and counter-rotating propellers.
The YB-49 was a very unusual configuration for an aircraft of that time. There was no fuselage or tail control surfaces. The crew compartment, engines, fuel, landing gear and armament was contained within the wing. Air intakes for the turbojet engines were placed in the leading edge of the wing. The exhaust nozzles were at the trailing edge. Four small vertical fins for improved yaw stability were also at the trailing edge.
The fins were likely too small. Test pilots complained about the airplane’s instability, which made it difficult to maintain course or altitude. A stability augmentation system was required.
Northrop YB-49 (U. S. Air Force)
The YB-49 had a length of 53 feet, 1 inch (16.180 meters), wingspan of 172 feet, 0 inches (52.426 meters) and overall height of 15 feet, 2 inches (4.623 meters). It weighed 88,442 pounds (40,117 kilograms) empty, and its maximum takeoff weight was 193,938 pounds (87,969 kilograms).
The Wing defined the airplane. It had an aspect ratio of 7.4:1. The wing’s root chord was 37 feet, 6 inches (11.430 meters). The wing was 7 feet, 1.5 inches (2.172 meters) thick at the root. The tip chord was 9 feet, 4 inches (2.844 meters). There was 0° angle of incidence at the root, -4° at the wing tips, and 0° 53′ dihedral. The leading edge was swept aft 26° 57′ 48″, and the trailing edge, 10° 15′ 22″. The wing’s total area was 4,000 square feet (371.6 square meters).
Northrop YB-49
The YB-49 was powered by eight General Electric-designed, Allison Engine Company-built J35-A-15 engines. The J35 was a single-spool, axial-flow turbojet engine with an 11-stage compressor section and single-stage turbine. The J35-A-15 was rated at 3,270 pounds of thrust (14.55 kilonewtons) at 7,400 r.p.m., Normal Power, and a Maximum (Military Power) rating of 3,750 pounds of thrust (16.68 kilonewtons) at 7,700 r.p.m. The engine was 14 feet, 0.0 inches (4.267 meters) long, 3 feet, 4.0 inches (1.016 meters) in diameter and weighed 2,400 pounds (1,089 kilograms).
Cruise speed for the YB-49 was 429 miles per hour (690 kilometers per hour). Its maximum speed 499 miles per hour (802 kilometers per hour) at 18,000 feet (5,486 meters) was restricted by Mach number. The airplane could climb from Sea Level to 30,000 feet (9,144 meters) in 21.0 minutes. It had a service ceiling of 49,700 feet (15,149 meters). The YB-49 had a combat radius of 1,611 miles (2,593 kilometers) at 420 miles per hour (676 kilometers per hour), carrying a 10,000 pound (4,536 kilogram) bomb load.
The YB-49 had no defensive armament. It could carry a maximum bomb load of 16,000 pounds (7,257 kilogram) in its internal bomb bay. (Turbulence resulting from open bomb bays significantly decreased bombing accuracy.)
Only two Northrop YB-49s were built. They were tested by Northrop and the Air Force for nearly two years. A third XB-35, 42-102369, was converted to a reconnaissance variant with an additional two engines mounted in pods below the leading edge of the wing, and designated YEB-49A.Although an additional nine YB-35s were ordered converted, the B-49 was not placed into production.
Northrop YB-49.Daniel H, Forbes, Jr., 1940
Daniel Hugh Forbes, Jr., was born at Carbondale, Kansas, 20 June 1920. He was the son of Daniel Hugh Forbes, a farmer, and Hattie Rundle Forbes. He attended North High School in Wichita Kansas, and then the Kansas State College at Manhattan, Kansas,
Maj. Daniel Forbes, Jr., USAF
Daniel Forbes enlisted in the United States Army as an aviation cadet at Fort Riley, Kansas, 23 May 1941. On 9 January 1942, he was commissioned a second lieutenant, Air Reserve. Forbes was promoted to the rank of 1st lieutenant, Army of the United States, 25 August 1942, and to captain, A.U.S., 15 August 1944. On 4 October 1945, he was promoted to major, A.U.S.
Major Forbes married Mrs. Edward C. Winkle (née Hazel Marie Moog), 11 March 1948. Her first husband, a 1st lieutenant assigned to the 314th Infantry Regiment, 79th Infantry Division, was killed in action in France, 1 October 1944. Less than three years later, Mrs. Hughes was a widow again.
Major Daniel Hugh Forbes, Jr., Air Corps, United States Army.
Glen Walter Edwards was born at Medicine Hat, Alberta, Canada, 5 March 1916, the second son of Claude Gustin Edwards, a real estate salesman, and Mary Elizabeth Briggeman Edwards. The family immigrated to the United States in August 1923 and settled near Lincoln, California. He attended Lincoln High School, where he was a member of the Spanish Club and worked on the school newspaper, “El Eco.” He graduated in 1936.
Lt. Glen W. Edwards
Edwards attended Placer Junior College, Auburn, California, before transferring to the University of California, Berkeley. He graduated in 1941 with a Bachelor of Arts (A.B.) degree, and then enlisted in the United States Army as an aviation cadet, 16 July 1941.
Following pilot training, Edwards was commissioned as a second lieutenant, Air Reserve, 6 February 1942. He was promoted to 1st lieutenant, Army of the United States, 16 September 1942. Lieutenant Edwards flew 50 combat missions in the Douglas A-20 Havoc light bomber with the 86th Bombardment Squadron (Light), 47th Bomb Group, in North Africa and fought at the Battle of the Kasserine Pass, 19–24 February 1943. He was next promoted to captain, 28 April 1943. He also flew during the invasion of Sicily, in late 1943.
Two U.S. Army Air Force Douglas A-20B-DL Havoc light bombers, 41-3014 and 41-3134, in Tunisia, 1943. (U.S. Air Force)
Edwards returned to the United States and was assigned to the Pilot Standardization Board, but was then sent to train as a test pilot at Wright Field. Captain Edwards was assigned as a test pilot in 1944 and tested the Northrop XB-35 and Convair XB-36. After World War II came to an end the U.S. Army and Air Corps were demobilized to 1/16 of their peak levels (from 8,200,000 to 554,000). Edwards was retained but reverted to the rank of 1st lieutenant. He had been awarded the Distinguished Flying Cross and the Air Medal with three oak leaf clusters (four awards). He was transferred to the United States Air Force after it was established as a separate service, 18 September 1947.
Glen Edwards was recommended to fly the Bell X-1 rocket plane, but when that assignment went to Chuck Yeager, Edwards was sent to Princeton University, Princeton, New Jersey, to study aeronautical engineering. He earned a masters degree in engineering (M.S.E.) in 1947.
Captain Glen Walter Edwards, Air Corps, United States Army.
Following the crash of the YB-49, Topeka Air Force Base in Kansas was renamed Forbes Air Force Base. Muroc Air Force Base was renamed Edwards Air Force Base in honor of Captain Edwards.
Captains Edwards’ remains were buried at the Lincoln Cemetery, Lincoln, California.
Edwards Air Force Base, California, looking northeast, photographed in 2007. (U.S. Air Force)
Edward Lee Swindell was born at Currituck, North Carolina, 22 April 1916. He was the son of Rudolph Bridgman Swindell, a machinist’s helper at the Portsmouth Navy Yard, and Eula Belle Williams Swindell.
Edward L. Swindell married Miss Edna Irene Hayman, 2 January 1942 at South Mills, North Carolina.
Swindell enlisted in the U.S. Army at Camp Lee, Virginia, 17 March 1942. He was 5 feet, 9 inches (1.75 meters) tall and weighed 156 pounds (70.7 kilograms).
Lieutenant Swindell’s remains were buried at the Forest Lawn Cemetery, Norfolk, Virginia.
Charles H. LaFountain was born 12 June 1925 in New York. He was the son of Leo L. LaFountain and Gladys Ethel Taylor LaFountain. He had served in the United States Navy and was a civilian employee of the Air Force. His remains were buried at the Lake Luzerne Cemetery, Lake Luzerne, New York.
Clare C. Lesser was born 27 June 1925 at Joliet, Illinois. He was the fifth of five children of Henry J. Leser, a worker at a wire mile, and Alvina Leser. Leser served as an ensign in the United States Naval Reserve. Like LaFountain, he was also a civilian employee of the Air Force. His remains were buried at St. John’s Cemetery, Joliet, Illinois.
3 June 1973: While maneuvering at low altitude at the Paris Air Show, the first production Tupolev Tu-144S, CCCP-77102, Aeroflot’s new Mach 2+ supersonic airliner, broke apart in midair and crashed into a residential area. All six crew members and eight people on the ground died. Another 25 were injured.
The Tu-144 was built by Tupolev OKB at the Voronezh Aviation Plant (VASO), Pridacha Airport, Voronezh. It was a large delta-winged aircraft with a “droop” nose for improved low speed cockpit visibility and retractable canards mounted high on the fuselage behind the cockpit. It was flown by a crew of 3 and was designed to carry up to 140 passengers.
77106 is 65.50 meters (215 feet, 6.6 inches) long, with a wingspan of 28.00 meters (91 feet, 10.4 inches). The tip of the vertical fin was 11.45 meters (37 feet, 6.8 inches) high. The 144S has a total wing are of 503 square meters (5,414 square feet). Its empty weight is 91,800 kilograms (202,384 pounds) and the maximum takeoff weight is 195,000 kilograms (429,901 pounds). (A number of Tu-144S airliners had extended wing tips, increasing the span to 28.80 meters (94 feet, 5.9 inches) and the wing area to 507 square meters (5,457 square feet).
The Tu-144S was powered by four Kuznetsov NK-144A engines. The NK-144 is a two-spool axial-flow turbofan engine with afterburner. It uses a 2-stage fan section, 14 stage compressor section (11 high- and 3 low-pressure stages), and a 3-stage turbine (1 high- and 2 low-pressure stages). It is rated at 147.0 kilonewtons (33,047 pounds of thrust) for supersonic cruise, and 178.0 kilonewtons (40,016 pounds of thrust) with afterburner for takeoff. The NK-144A is 5.200 meters (17 feet, 0.7 inches) long, 1.500 meters (4 feet, 11.1 inches) in diameter and weighs 2,827 kilograms (6,233 pounds).
The 144S has a cruise speed of Mach 2.07 (2,200 kilometers per hour/1,367 miles per hour) with a maximum speed of Mach 2.35 (2,500 kilometers per hour/1,553 miles per hour). The service ceiling is approximately 20,000 meters (65,617 feet). Its practical range is 3,080 kilometers (1,914 miles).
In actual commercial service, the Tu-144 was extremely unreliable. It was withdrawn from service after a total of just 102 commercial flights, including 55 passenger flights.
The cause of the accident is not known, other than the obvious structural failure, but there is speculation that the Tu-144 was trying to avoid another airplane.
Major Eugene Moses, Navigator, 1st Lieutenant David F. Dickerson, Defensive Systems Officer, and Major Elmer E. “Gene” Murphy, Aircraft Commander, with Colonel James K. Johnson, stand in front of the Convair B-58, The Firefly, 11 May 1961. All three airmen were killed when their B-58 crashed at the Paris Air Show, 3 June 1961. (University of North Texas Libraries)
3 June 1961: At the Paris Air Show, Aéroport de Paris – Le Bourget, Paris, France, the Blériot, Harmon and Mackay Trophy-winning Convair B-58A-10-CF Hustler, 59-2451, The Firefly, crashed, killing the aircrew, Major Elmer E. Murphy, Major Eugene Moses, and First Lieutenant David F. Dickerson. The B-58 was totally destroyed.
Only days earlier, The Firefly—with a different aircrew—had set a new speed record for its flight from New York to Paris.
On leaving Le Bourget for the return trip to the United States, Major Murphy engaged in low-altitude aerobatics. There are reports that while performing a slow roll, the bomber entered a cloud bank. The pilot lost visual reference, but the roll caused the attitude indicator to exceed its limits. Disoriented and without instrument flight capability, the B-58 crashed.
The Sunday Herald (Provo, Utah) reported:
. . . The B-58 took off with five other American supersonic jets for the demonstration and flew back over the airfield at normal speed.
Then the plane started to make what looked from the ground like a “barrel” maneuver, a roll over, and suddenly disappeared from the view of the audience at the airfield. . . .
. . . An eyewitness said the plane appeared to explode in flight after making a “barrel roll.”
It was “transformed into a ball of fire,” said Dr. J.P Duchon. “We heard a tremendous explosion at the same time.” The B-58 crashed into some farm acreage gouging a 15-feet-deep crater in the ground.
The Fort Worth Star-Telegram published the following:
. . . According to reports from [John] Randel [correspondent for the Paris edition of the New York Herald-Tribune] and the Associated Press, this is the way the crash occurred:
The delta-wing bomber streaked passed the control tower and disappeared into the overcast. No one at Le Bourget Airport, where the air show was being staged, saw any sign of the crash, which occurred about 5 p.m. Paris time (10 a.m. Fort Worth time).
Wheat Field.
But at the little town of Louvres, three miles north of the airport, there was a tremendous explosion.
The needle-nose bomber plunged into a wheat field. This was about 10 minutes after takeoff.
The nearest building was from 500 to 800 yards away.
Louvres police said they did not know whether the plane exploded in air or when it hit the ground.
Fuel from the plane caught fire, sending up billows of smoke. Huge craters were cut into the ground by plummeting wreckage, indicating an aerial explosion.
About 10 fire trucks were soon at the scene spraying water on the burning debris.
Helicopter Lift.
One report said the plane had completed a slow roll and was trying a snap roll when two or three of its four engines ripped off. This report was strictly unofficial. . . .
