Tag Archives: Strategic Bomber

12 February 1959

Convair B-36J-10-CF Peacemaker, 52-2827, the last B-36 built. (U.S. Air Force)
Convair B-36J-75-CF Peacemaker, 52-2827, the last B-36 built. (U.S. Air Force)

The Last Peacemaker: This gigantic airplane, a Convair B-36J-75-CF Peacemaker, serial number 52-2827, was the very last of the ten-engine strategic bombers built by the Convair Division of General Dynamics at Fort Worth, Texas. It was completed 1 July 1954. On 14 August, it was delivered to the Strategic Air Command, 92nd Bombardment Wing, Heavy, at Fairchild Air Force Base, Washington. In April 1957, 52-2827 was assigned to the 95th Bombardment Wing, Heavy, at Biggs Air Force Base, El Paso, Texas.

The last one built, 52-2827 was also the last operational B-36.

Convair B-36J-10-CF Peacemaker 52-2827 at Amon Carter Field, Fort Worth, Texas, 12 February 1959. (Unattributed)
Convair B-36J-75-CF Peacemaker 52-2827, City of Fort Worth, at Amon Carter Field, Fort Worth, Texas, 12 February 1959. (Unattributed)

On 12 February 1959, after 4 years, 5 months, 30 days service, the Air Force returned the bomber to Fort Worth. 52-2827 departed Biggs Air Force Base at 11:00 a.m., under the command of Major Frederick J. Winter. Other pilots were Colonel Gerald M. Robinson, commanding the 95th Wing, and Captain Wilson P. Smith. (Colonel Robinson flew as first pilot during the takeoff, while Major Winter flew the landing.) The bomber’s crew were hand-picked, and included two navigators, two flight engineers, an observer, two radio operators, two gunners and a crew chief. Ten newspaper, radio and television reporters were on board as well.

Crew of City of Fort Worth

The B-36 touched down at Amon Carter Field at 2:55 p.m. The Peacemaker’s log book was closed out with a total of 1,414 hours, 50 minutes, flight time.

After a ceremony attended by thousands, the bomber was officially retired. A bugler blew “Taps,” and then the Peacemaker was towed away.

It was put on display at Amon Carter Field. After decades of neglect, the bomber was placed in the care of the Pima Air and Space Museum at Tucson for restoration and display.

The last Peacemaker, Convair B-36J-10-CF 52-2827, comes to the end of the assembly line at Fort Worth, Texas. (University of North Texas Libraries)
The last Peacemaker, Convair B-36J-75-CF 52-2827, comes to the end of the assembly line at Fort Worth, Texas. (University of North Texas Libraries)

Convair B-36J 52-2827 is one of 14 “Featherweight III” high altitude variants. It was built without the six retractable defensive gun turrets of the standard B-36, retaining only the two M24A1 20 mm autocannons in the tail. This reduced the crew requirement to 13. It is 162 feet, 1 inch (49.403 meters) long with a wingspan of 230 feet (70.104 meters) and overall height of 46 feet, 9 inches (14.249 meters). The empty weight is 166,125 pounds (75,353 kilograms) and loaded weight is 262,500 pounds (119,068 kilograms). Maximum takeoff weight is 410,000 pounds (185,973 kilograms).

The B-36J has ten engines. There are six air-cooled, supercharged 4,362.49 cubic-inch-displacement (71.488 liter) Pratt & Whitney Wasp Major C6 (R-4360-53) four-row, 28-cylinder radial engines placed inside the wings in a pusher configuration. These had a compression ratio of 6.7:1 and required 115/145 aviation gasoline. The R-4360-53 had a Normal Power rating of 2,800 horsepower at 2,600 r.p.m. Its Military Power rating was 3,500 horsepower at 2,800 r.p.m., and 3,800 horsepower at 2,800 r.p.m. with water injection—the same for Takeoff. The engines turned three-bladed Curtiss Electric constant-speed, reversible propellers with a diameter of 19 feet, 0 inches (5.791 meters) through a 0.375:1 gear reduction. The R-4360-53 is 9 feet, 9.00 inches (2.972 meters) long, 4 feet, 7.00 inches (1.397 meters) in diameter, and weighs 4,040 pounds (1,832.5 kilograms).

Four General Electric J47-GE-19 turbojet engines are suspended under the wings in two-engine pods. The J47 is a  single-shaft axial-flow turbojet engine with a 12-stage compressor section, 8 combustion chambers, and single-stage turbine. The J47-GE-19 was modified to run on gasoline and was rated at 5,200 pounds of thrust (23.131 kilonewtons).

The B-36J Featherweight III had a cruise speed of 230 miles per hour (370 kilometers per hour) and a maximum speed of 418 miles per hour (673 kilometers per hour). The service ceiling was 43,600 feet (13,289 meters) and its combat radius was 3,985 miles (6,413 kilometers). The maximum range was 10,000 miles (16,093 kilometers).

The B-36 was designed during World War II and nuclear weapons were unknown to the Consolidated-Vultee Aircraft Corporation engineers. The bomber was built to carry up to 86,000 pounds (39,009 kilograms) of conventional bombs in the four-section bomb bay. It could carry the 43,600 pound (19,777 kilogram) T-12 Cloudmaker, a conventional explosive earth-penetrating bomb. When armed with nuclear weapons, the B-36 could carry several Mk.15 3.8 megaton thermonuclear bombs. By combining the bomb bays, one Mk.17 15-megaton thermonuclear bomb could be carried.

Bomb, Mark 17, displayed with Convair B-36J Peacemaker at the National Museum of the United States Air Force. (U.S. Air Force)
Bomb, Mark 17 Mod 2, displayed with Convair B-36J Peacemaker at the National Museum of the United States Air Force. (U.S. Air Force)

Between 1946 and 1954, 384 B-36 Peacemakers were built. They were never used in combat. Only four still exist.

Convair B-36J-10-CF 52-2827 at the Pima Air and Space Museum, Tucson, Arizona. (B-36 Peacemaker Museum)
Convair B-36J-75-CF 52-2827 at the Pima Air & Space Museum, Tucson, Arizona. (B-36 Peacemaker Museum)

TDiA has received an number of comments recently regarding the safety of the Convair B-36 Peacemaker strategic bomber. Based on our research, out of the 384 built, 27 B-36s were lost in accidents between 1950 and 1957, amounting to just 7% of the fleet. 165 crew members were killed. The most common cause seems to be a fire following a landing gear collapse. The first, a B-36B, was lost on 14 February 1950. That incident is described at https://www.thisdayinaviation.com/13-february-1950/ . On 27 April 1951, a flight of four North Americaan Aviation F-51D Mustangs attacked a B-36D over Oklahoma. One fighter collided with the bomber, which crashed, resulting in the death of 12 of the 17 airmen on board. (The F-51D pilot was also killed.) 6 May 1951, a B-36D crashed while attempting to land in high winds at Kirtland AFB, New Mexico. 23 of 25 on board were killed. 22 August 1951, a taxiing RB-36E collided with a parked RB-36E, which was destroyed. No injuries. 29 January 1952, a B-36D landed short of the runway and skidded into a snow bank at Fairchild AFB, Washington. The aircraft was destroyed by fire, but there were no fatalities. 6 March 1952, a B-36F was destroyed by fire while parked. A fuel leak was caused when the left landing gear failed on landing. There were no fatalities. 15 April 1952, a B-36D overran the runway during a maximum weight takeoff at Fairchild AFB, WA, because flight control trim had been incorrectly set. The aircraft was destroyed by fire. 15 of 17 on board were killed. 28 May 1952, a B-36F returning to Carswell AFB after takeoff due to a loose cowling, crashed and caught fire when its landing gear collapsed on landing, 7 on board were killed. 4 August 1952. A B-36F was destroyed by fire while parked at Carswell AFB. While being fueled, gasoline overflowed from a fuel vent and was ignited by a ground power unit. No injuries or deaths. 13 February 1953, a B-36H was misdirected during a GCA approach to Goose Bay, Labrador. It crash landed on a hill. 2 of 17 on board were killed. 5 August 1952, a modified B-36D being flown by a Convair crew crashed in the ocean west of San Diego, California, when it’s number 5 engine caught fire, which then spread to the rest of the wing. 7 of 8 crewmen bailed out while the pilot remained at the controls to guide the bomber away from the populated area. He was killed. 1 crewman drowned. 4 crewmen received minor injuries. 18 February 1953, an RB-36H was destroyed by fire when it’s landing gear collapsed during landing at Walker AFB, New Mexico. Of the 22 on board there were no fatalities. 18 March 1953, an RB-36H was destroyed when it hit a hill in Labrador. The aircraft was off course and one-and-a-half hours ahead of schedule. All 23 on board were killed. 5 August 1953, an RB-36H went down in the Atlantic Ocean (cause not discovered at this time.) 19 of 23 on board were killed. 11 December 1953, a B-36D crashed into a mountain in poor visibility while on approach to Biggs AFB, Texas. (Not in GCA radar contact). 9 of 9 on board were killed. 26 February 1954, at Fairchild AFB, the landing gear of a taxiing B-36D collapsed, resulting in the aircraft being destroyed by fire. No fatalities among the 20 on board. 29 March 1954, a B-36D crashed while practicing a takeoff abort at Fairchild AFB. All 7 on board were killed. 27 August 1954, an RB-36H making its sixth practice night approach at Ellsworth AFB hit an obstruction on a hill with its left wing and crashed. (Obstruction lights were inoperative due to a lightning strike.) 26 of 27 on board were killed. [Altimeter was in error, GCA was out of calibration, resulting in the aircraft being 150 feet lower on the glide slope than it should have been.] 8 February 1955, a B-36D landed short of the runway during a practice landing at Carswell AFB, Texas. Landing gear was sheared off and the aircraft damaged beyond economical repair. No fatalities. 6 March 1955, a B-36D landing at Loring AFB, Maine, hit a wingtip on a snowbank, resulting in the aircraft being destroyed by fire. No fatalities but some (unknown how many) serious injuries among the 11 on board. 25 May 1955, a B-36J disintegrated in flight during a thunderstorm/tornado near Sterling City, Texas. All 15 on board were killed. (Lost outboard wing panels and all tail surfaces. Impacted in level attitude with little forward motion.) 4 January 1956, an RB-36H crashed on landing at Ellsworth AFB, South Dakota after uneven power reduction. Destroyed by fire. No fatalities. 19 January 1956, a B-36D made a hard landing at Biggs AFB, Texas. No fatalities. Aircraft damaged beyond economical repair. 15 November 1956, a B-36H lost power on takeoff from Lowry AFB, Colorado, due to fuel starvation. It crashed one mile short of the runway attempting an emergency landing at Stapleton Airport, Denver. Aircraft destroyed by fire. No fatalities among 21 on board. 6 June 1957, a B-36H was damaged beyond economical repair while flying through a thunderstorm near Carswell AFB, Texas. No fatalities. 9 November 1957, an RB-36H was destroyed by fire while parked at Ramey AFB, Puerto Rico. No fatalities… A major incident occurred 1 September 1952, when a tornado struck Carswell AFB. 61 B-36s on the ground were damaged. Most were repaired and returned to service within two weeks.

© 2019, Bryan R. Swopes

4 February 1969

North American Aviation XB-70A-1-NA Valkyrie 62-0001. (U.S. Air Force)

4 February 1969: The North American Aviation XB-70A-1-NA Valkyrie, 62-0001, made its very last flight from Edwards Air Force Base, California, to Wright-Patterson Air Force Base, Ohio. NASA Research Test Pilot Fitzhugh L. Fulton, Jr., Lieutenant Colonel, U.S. Air Force (Retired), and Lieutenant Colonel Emil Sturmthal, U.S. Air Force, were the flight crew for this final flight.

On arrival at Wright-Patterson, Fulton closed out the log book and handed it over to the curator of the National Museum of the United States Air Force.

The Mach 3+ prototype strategic bomber and high-speed, high-altitude research airplane made its first flight 21 September 1964. It completed 83 flights for a total of 160 hours, 16 minutes of flight time.

Lieutenant Colonel Emil Sturmthal, USAF and Fitzhugh Fulton, NASA, with the North American Aviation XB-70A-1-NA 62-0001 at Edwards AFB, California. (Chris Walmsley/Rockwell International)
Lieutenant Colonel Emil Sturmthal, USAF and Fitzhugh Fulton, NASA, with the North American Aviation XB-70A-1-NA 62-0001 at Edwards AFB, California. (Chris Walmsley/Rockwell International)

62-0001 was the first of three prototype Mach 3+ strategic bombers. (The third prototype, XB-70B 62-0208, was not completed.) The Valkyrie utilized the most advanced technology available. Materials and manufacturing techniques had to be developed specifically to build this airplane. It is a large delta wing airplane with a forward canard and two vertical fins. The outer 20 feet (6.096 meters) of each wing could be lowered to a 25° or 65° angle for high speed flight. Although this did provide additional directional stability, it actually helped increase the compression lift, which supported up to 35% of the airplane’s weight in flight.

The XB-70A is 185 feet, 10 inches (56.642 meters) long with a wingspan of 105 feet (32.004 meters) and overall height of 30 feet, 9 inches (9.373 meters). The delta wing had 0° angle of incidence and 0° dihedral. (The second XB-70A had 5° dihedral.) The wing has 3.0° negative twist. At 25% chord, the wing has 58.0° sweepback. Total wing area is 6,297 square feet (585 square meters). The Valkyrie has a empty weight of 231,215 pounds (104,877 kilograms), and maximum takeoff weight (MTOW) of 521,056 pounds (236,347 kilograms).

It is powered by six General Electric YJ93-GE-3 turbojet engines. The J93 is an afterburning single-shaft axial-flow turbojet with an 11-stage compressor section and two-stage turbine. It has a Normal Power rating of 17,700 pounds of thrust (78.73 kilonewtons), 19,900 pounds (88.52 kilonewtons), Military, and 28,000 pounds (124.55 kilonewtons), with afterburner, Maximum. (All ratings are continuous, at 6,825 r.p.m.) The YJ93-GE-3 is 236.3 inches (6.002 meters) long, 54.15 inches (1.375 meters) in diameter, and weighs 5,220 pounds (2,368 kilograms).

The maximum speed achieved was Mach 3.1 (1,787 knots/2,056 miles per hour, or 3,309 kilometers per hour) at 73,000 feet (22,250 meters). Its mission maximum speed is 1,721 knots (1,980 miles per hour/3,187 kilometers per hour) at 79,050 feet (29,094 meters). The XB-70A has a rate of  climb of 30,380 feet per minute (154 meters per second). The service ceiling is 77,350 feet (23,576 meters).

The Valkyrie has a maximum fuel capacity of 41,688 gallons (157,806 liters) JP-5 or JP-6, carried in 11 tanks throughout the fuselage and wings. It also carries 42.4 gallons (161 liters) of engine oil. The maximum range is 3,726 nautical miles (4,287 statute miles/6,901 kilometers).

The second Valkyrie, XB-70A-2-NA 62-0207, was destroyed when it crashed after a mid-air collision with a Lockheed F-104N Starfighter flown by NASA Chief Research Test Pilot Joseph A. Walker, 8 June 1966. Both Walker and the B-70’s co-pilot, Major Carl S. Cross, U.S. Air Force, were killed.

XB-70A Valkyrie 62-0001 is in the collection of the National Museum of the United States Air Force.

North American Aviation XB-70A-1-NA Valkyrie 62-0001 at Wright-Patterson Air Force Base, Ohio. (U.S. Air Force)
North American Aviation XB-70A-1-NA Valkyrie 62-0001 at Wright-Patterson Air Force Base, Ohio. (U.S. Air Force)
North American Aviation XB-70A-1-NA Valkyrie 62-0001 at Wright-Patterson Air Force Base, Ohio. This photograph shows the twelve elevons that act as elevators, flaps and ailerons, the swiveling action of the vertical fins, open drag chute doors and the variable exhaust outlets. (U.S. Air Force).
North American Aviation XB-70A-1-NA Valkyrie 62-0001 at Wright-Patterson Air Force Base, Ohio. This photograph shows the twelve elevons that act as elevators, flaps and ailerons, the swiveling action of the vertical fins, open drag chute doors and the variable exhaust outlets. (U.S. Air Force).

© 2025, Bryan R. Swopes

17 January 1966

Boeing KC-135A-BN Stratotanker 58-0004 refuels Boeing B-52G-75-BW Stratofortress 57-6741. These are the same type aircraft that were involved in the 1966 Palomares Incident. (Boeing)

17 January 1966: A United States Air Force Boeing B-52G-115-BW Stratofortress, 58-0256, and its 7-man crew, along with a second B-52, were flying an Airborne Nuclear Alert patrol over the Mediterranean Sea. The bomber, call sign “Tea 16,” was armed with four Mark 28 nuclear bombs carried in its bomb bay.

At approximately 10:30 a.m., the two B-52s rendezvoused with two Boeing KC-135A-BN Stratotankers, based at Morón Air Base, Spain, for the second aerial refueling of the mission. The aircraft were at 31,000 feet (9,448 meters) off the southern coast of Spain.

Major Larry G. Messinger, a veteran of World War II, aboard as a relief pilot, was flying Tea 16 from the left seat. The aircraft commander, Captain Charles J. Wendorf, was in the right, co-pilot’s seat, while 1st Lieutenant Richard J. Rooney, the assigned co-pilot, rode in the Instructor Pilot’s seat.

Major Messinger later said, “We came in behind the tanker, and we were a little bit fast, and we started to overrun him a little bit. . . .”

A boom operator’s view as a B-52 Stratofortress refuels. (John E. Considine/NASM)

B-52G 58-0256 collided with the refueling boom of “Troubadour 14” (KC-135A 61-0273).¹ The boom penetrated the bomber’s fuselage, broke structural members and the left wing broke off. The B-52 exploded. The fully-loaded tanker, on fire, went into a steep dive. At 1,600 feet (488 meters), it also exploded.

The four crewmen aboard the tanker were killed. Three of the seven men on the B-52 ejected, and the co-pilot, who was not in an ejection seat, literally fell out of the disintegrating bomber. The navigator’s parachute did not open and he was killed. Three others were unable to escape the doomed airplane and were also killed.

Wreckage of B-52G 58-0256 at Palomares, Spain, January 1966. (Kit Talbot/The New York Times)

As the B-52 broke apart, the four nuclear bombs it carried in the bomb bay fell free. Three of them fell near the fishing village of Palomares. In two of these, the conventional explosives that “implode” the plutonium to start a chain reaction, detonated on impact, but a nuclear explosion did not occur. However, plutonium was scattered over the area. The third bomb was recovered intact, though it was slightly damaged. The retarding parachute of the fourth Mark 28 opened and it was carried offshore by the wind and fell into the Mediterranean Sea.

The missing B28 is recovered. (Department of Energy)

A massive recovery operation took place. The fourth bomb was recovered after five months. It had come to rest in an underwater canyon at a depth of 2,550 feet (777 meters).

1,400 tons of soil was packed into more than 6,000 steel drums and taken to the United States.
1,400 tons of soil was packed into more than 6,000 steel drums and taken to the United States.

558 acres (226 hectares) of land in and around Palomares was contaminated. The soil was removed and placed in steel barrels for transportation to the United States for burial at the Savannah River Plant, a nuclear reservation in South Carolina.

Three airmen position a B28Y1 1.1 megaton thermonuclear bomb for loading aboard a B-52 Stratofortress. (U.S. Air Force)
Three airmen position a B28Y1 thermonuclear bomb for loading aboard a B-52 Stratofortress. (TSgt. Boyd Belcher, U.S. Air Force)

The Mark 28 was a two-stage radiation-implosion thermonuclear bomb which was designed by the Los Alamos National Laboratory and produced from January 1958 to May 1966. In 1968, it was redesignated B28. More than 4,500 were manufactured in as many as 20 variants. Explosive yield varied between 70 kilotons and 1.45 megatons. The B28Y1 in the photograph above is a 1.1 megaton weapon. The bomb remained in service until 1991.

¹ Author Barbara Moran writes:

     What happened next is disputed. Wendorf says he still had his eye on the tanker when he heard an explosion coming from the back of the B-52.  The plane pitched down and to the left. Fire and debris shot into the cockpit and the plane began to come apart.

     The other pilots agree that the accident began with an explosion in the back of the B-52. But the official accident report tells a different story. Investigators concluded that the B-52 overran the KC-135 and then pitched upward and rammed the tanker. The collision ripped the tanker’s belly open, spilling jet fuel through the plane, onto the bomber, and into the air. A fireball quickly engulfed both planes.

     Rooney and Wendorf suspect that fatigue failure—a problem in the B-52—caused a portion of the tail to break off. Flying debris sparked an explosion in one of the gas tanks, and the plane came apart. After the initial explosion, the bomber may have rammed the tanker—everything happened so quickly that the pilots can’t be sure. But they insist that the explosion came first and that it came from the back of the bomber.

     We may never know conclusively whether a collision triggered the accident. After a crash, it is Air Force custom to bury the wreckage. Because the accident occurred on foreign soil, SAC dumped the debris into the ocean. The one surviving member of the investigation board has refused to speak publicly about the accident.

The Day We Lost the H-Bomb, by Barbara Moran, Presidio Press, 2009, Chapter 2, Pages 30–31

© 2025, Bryan R. Swopes

23 December 1974

The first prototype Rockwell B-1A Lancer, 74-0158, takes off at AF Plant 42, Palmdale, California, 23 December 1974. (U.S. Air Force)
The first prototype Rockwell B-1A Lancer, 74-0158, takes off at Air Force Plant 42, Palmdale, California, 23 December 1974. (U.S. Air Force)

23 December 1974: The first of four prototype Rockwell B-1A Lancer Mach 2.2 strategic bombers, serial number 74-0158, made its first flight from Air Force Plant 42, Palmdale, California. The aircraft commander was company test pilot Charles C. Bock, Jr. (Colonel, U.S. Air Force, retired) with pilot Colonel Emil Sturmthal, U.S. Air Force, and flight test engineer Richard Abrams. After basic flight evaluation, the B-1A landed at Edwards Air Force Base, about 22 miles (35 kilometers) to the northeast of Palmdale.

Rockwell B-1A 74-0158 with a General Dynamics F-111 chase plane, landing at Edwards Air Force base. (U.S. Air Force)
Rockwell B-1A 74-0158 with a General Dynamics F-111 chase plane, landing at Edwards Air Force Base, California. (U.S. Air Force)

The Rockwell International B-1A Lancer was designed to operate with a flight crew of four. It was 150 feet, 2.5 inches (45.784 meters) long. With the wings fully swept, the span was 78 feet, 2.5 inches (23.838 meters), and extended, 136 feet, 8.5 inches (41.669 meters). The tip of the vertical fin was 33 feet, 7.25 inches (10.243 meters) high. The wings have an angle of incidence of 2°,  with 1° 56′ anhedral and -2° twist. The leading edges were swept to 15° when extended, and 67½°, fully swept. The total wing area is 1,946 square feet (180.8 square meters).

The empty weight of the B-1A was approximately 173,000 pounds (78,472 kilograms). The maximum takeoff weight was 389,800 pounds (176,810 kilograms), but once airborne it could take on additional fuel up to a maximum weight of 422,000 pounds (191,416 kilograms).

Rockwell International B-1A Lancer 74-0158 landing at Edwards Air Force Base. (U.S. Air Force 171219-F-ZZ999-412)

The Lancer was powered by four General Electric F101-GE-100 afterburning turbofan engines. This is an axial-flow engine with a 2-stage fan section, 9-stage compressor and 3-stage turbine (1 high- and 2 low-pressure stages). It is rated at 16,150 pounds of thrust (71.839 kilonewtons), and 29,850 pounds (132.779 kilonewtons) with afterburner. The F101-GE-100 is 15 feet, 0.7 inches (4.590 meters) long, 4 feet, 7.2 inches (1.402 meters) in diameter, and weighs 4,165 pounds (1,889 kilograms).

The bomber’s maximum speed was 1,262 knots 1,452 miles per hour/2,337 kilometers per hour)—Mach 2.2—at an optimum altitude of 53,000 feet (16,154 meters), its combat ceiling. The B-1A’s combat range was 5,675 nautical miles (6,531 statute miles/10,510 kilometers) The maximum ferry range was 6,242 nautical miles (7,183 statute miles/11,560 kilometers).

The B-1A was designed to carry 75,000 pounds (34,019 kilograms) of bombs in an internal bomb bay. It could carry a maximum of 84 MK-82 conventional explosive bombs. For a nuclear attack mission, the Lancer could carry 12 B43 free-fall bombs, or 24 B61 or B77 bombs. For a stand-off attack, the bomber could carry 24 AGM-69 SRAM (Short Range Attack Missile) nuclear missiles.

Each of the four prototypes served its own role during testing. 74-0158 was the flight evaluation aircraft.

By the time that the B-1A program was cancelled, 74-0158 had made 79 flights totaling 405.3 hours. It was dismantled and used for weapons training at Lowry Air Force Base, Colorado.

The first prototype Rockwell B-1A Lancer, 74-0158, at Edwards AFB. Visual differences of the B-1A that distinguish it from the later B-1B are the long drag link on the nose landing gear, the vertical inlet splitter vanes, black wheels and a long tail cone. On the upper fuselage behind the cockpit are the "elephant ears" intended to stabilize the crew escape capsule. (U.S. Air Force)
The first prototype Rockwell B-1A Lancer, 74-0158, at Edwards AFB. Visual differences of the B-1A that distinguish it from the later B-1B are the long drag link on the nose landing gear, the vertical inlet splitter vanes, black wheels and a long tail cone. On the upper fuselage behind the cockpit are the “elephant ears” intended to stabilize the crew escape capsule. (U.S. Air Force)

© 2018, Bryan R. Swopes

11 November 1956

Convair XB-58 55-0660 in its original paint scheme. (Unattributed)

11 November 1956: At Fort Worth, Texas, Convair’s Chief Test Pilot, Beryl Arthur Erickson, takes the first prototype XB-58, serial number 55-0660, on its first flight.

“Pilot B.A. Erickson is interviewed by NBC after a flight as part of a B-58 Press Show Demonstration. July 10, 1957″—Code One

The B-58 Hustler was a high-altitude Mach 2 strategic bomber which served with the United States Air Force from 1960 to 1970. It was crewed by a pilot, navigator/bombardier and a defensive systems operator, located in individual cockpits. The aircraft is a delta-winged configuration similar to the Convair F-102A Delta Dagger and F-106 Delta Dart supersonic interceptors.

The Hustler is 96 feet, 10 inches (29.515 meters) long, with a wing span of 56 feet, 10 inches (17.323 meters) and an overall height of 31 feet 5 inches (9.576 meters). The fuselage incorporates the “area rule” which resulted in a “wasp waist” or “Coke bottle” shape for a significant reduction in aerodynamic drag. The airplane’s only control surfaces are two “elevons” and a rudder, and there are no flaps.

The B-58’s delta wing has a total area of 1,542.5 square feet (143.3 square meters) and the leading edges are swept back at a 60° angle. The wing has an angle of incidence of 3° and 2° 14′ dihedral (outboard of Sta. 56.5).

The B-58A had an empty weight of 51,061 pounds (23161 kilograms), or 53,581 pounds (24,304 kilograms) with the MB-1 pod. The maximum takeoff weight was 158,000 pounds (71,668 kilograms).

Convair XB-58 Hustler 55-0660. (U.S. Air Force)

The B-58A was powered by four General Electric J79-GE-5 axial-flow afterburning turbojet engines, suspended under the wings from pylons. This was a single-shaft engine with a 17-stage compressor and 3-stage turbine. It had a Normal Power rating of 9,700 pounds of thrust (43.148 kilonewtons). The Military Power rating was 10,000 pounds (44.482 kilonewtons), and it produced a maximum 15,600 pounds (69.392 kilonewtons) at 7,460 r.p.m., with afterburner. The J79-GE-5 was 16 feet, 10.0 inches (5.131 meters) long and 2 feet, 11.2 inches (0.894 meters) in diameter. It weighed 3,570 pounds (1,619 kilograms).

Convair XB-58 Hustler 55-0660 rotates during a high-speed taxi test. (Code One)

The bomber had a cruise speed of 544 knots (626 miles per hour/1,007 kilometers per hour) and a maximum speed of 1,147 knots (1,320 miles per hour/2,124 kilometers per hour) at 67,000 feet (20,422 meters). The B-58A had a combat radius of 4,225 nautical miles (4,862 statute miles/7,825 kilometers). Its maximum ferry range was 8,416 nautical miles (9,685 statute miles/15,586 kilometers).

Convair XB-58 55-0660 carrying at jettisonable fuel/weapon centerline pod. (U.S. Air Force)

The B-58 weapons load was a combination of Mark 39, B43 or B61 thermonuclear bombs. The weapons could be carried in a jettisonable centerline pod, which also carried fuel. The four of the smaller bombs could be carried on underwing hardpoints. There was a General Electric M61 20 mm rotary cannon mounted in the tail, with 1,200 rounds of ammunition, and controlled by the Defensive Systems Officer.

FAI altitiude record setting Convair B-58A-10-CF 59-2456, showing the bomber’s weapons capability. (U.S. Air Force)

116 were built and they served the Strategic Air Command until January 1970 when they were sent to Davis-Monthan AFB, Tucson, Arizona for long-term storage.

Convair XB-58 55-0660 was transferred to Kelly Air Force Base, Texas, 15 March 1960, for use as a ground instruction airframe. It was scrapped some time later.

Convair XB-58 55-0660 touches down on the runway following a test flight. (Unattributed)

© 2018, Bryan R. Swopes