The delta-wing Convair Hustler was the first U. S. Air Force supersonic operational bomber. The B-58 made its initial flight on Nov. 11, 1956 and flew supersonically on Dec. 30, 1956.

Distinctive B-58 features included its sophisticated inertial guidance navigation and bombing system, slender "wasp-waist" fuselage, and extensive use of heat-resistant honeycomb sandwich skin panels in the wings and fuselage. The thin fuselage prevented internal carriage of bombs so an external droppable two-component pod beneath the fuselage contained extra fuel and a nuclear weapon, reconnaissance equipment or other specialized gear. The B-58 crew consisted of a pilot, navigator-bombardier and defense systems operator.

The Air Force ordered 86 Hustlers, which were operational in the Strategic Air Command between 1960 and 1970. B-58s set 19 world speed and altitude records and won five different aviation trophies. Despite its successes, the Hustler had limitations in range, payload and growth potential.

There were a total of 116 B-58s built: 30 test and pre-production aircraft and 86 for inventory.

The last B-58 was retired in January 1970, about three months after the first FB-111 was accepted by SAC. The aircraft was phased out of the inventory after only 10 years of service.

General Characteristics

¥ Primary function: bomber

¥ Span: 56 feet 10 inches

¥ Length: 96 feet 10 inches

¥ Height: 31 feet 5 inches

¥ Weight: 163,000 pounds max.

¥ Armament: One 20mm cannon in tail; nuclear weapons in pod or on under-wing pylons

¥ Engines: Four General Electric J79s of 15,000 pounds thrust each with afterburner

¥ Cost: $12,442,000

¥ Maximum speed: 1,325 mph

¥ Cruising speed: 610 mph

¥ Range: 4,400 miles without aerial refueling

¥ Service ceiling: 64,800 feet

XB-70A-Valkyrie

Manufacturer: North American

Engine:6 J93-GE5 Turbojets

Speed: Mach3

Wingspan:105ft

Length: 196ft