10 September 1952: The Boeing Michigan Aeronautical Research Center (BOMARC) XF-99 surface-to-air antiaircraft guided missile made its first flight when launched from the Cape Canaveral Air Force Station on the east coast of Florida. This flight  was a test of the missile’s liquid-fueled Aerojet General booster engine.

The surface-to-air missile was developed as a defense against Soviet intercontinental nuclear-armed bombers, such as the Tupolev Tu-4 and Tu-16. At the time, the missile was considered to be an unmanned aircraft and was given a fighter designation, F-99, later redesignated IM-99, then CIM-10.

After launch, the Bomarc would be guided toward its target by the North American Air Defense Command (NORAD) Semi-Automatic Ground Environment (SAGE) system. Once with 10 miles (16 kilometers) of the target, the missile would home in using its own radar. The warhead would be detonated by a proximity fuse.

The operational Bomarc missile was armed with a W-40 nuclear warhead. The W-40 was a boosted fission implosion device which had been developed as the primary for the Mk-28 thermonuclear bomb. It was 1 foot, 5.9 inches (0.455 meters) in diameter, 2 feet, 7.64 inches (0.804 meters) long, and weighed 385 pounds (175 kilograms). The warhead had a yield of 10 kilotons. Its effective radius was approximately 0.6 mile (1 kilometer).

The Bomarc A was 46 feet, 10 inches (14.2748 meters) long, with a diameter of 2 feet, 11, inches 9 meters). It had a wingspan of 18 feet, 2 inches (5.5372 meters), and height of 10 feet, 4 inches (3.1496 meters), It weighed 15,619 pounds (7,085 kilograms).

The Bomarc A first stage was powered by a liquid-fueled Aerojet General LR59-AG-13 engine, producing 35,875 pounds of thrust (159.6 kilonewtons). The second stage was driven by two Marquardt RJ43-MA-7 ramjet engines, of 11,500 pounds of thrust, each (51.15 kilonewtons).

Because the hypergolic liquid fuel of the Bomarc A was highly corrosive and dangerous to handle, the missile could not be fueled until just before launch, which required approximately two minutes. This significantly reduced the time available to intercept enemy bombers. To eliminate the delay, the Bomarc B used a Thiokol XM-51 solid fuel rocket engine, which increased the first stage thrust to 50,000 pounds (222.4 kilonewtons).

While the Bomarc A used vacuum tubes in its electronic circuitry, the Bomarc B was solid state. Its intercept pulse doppler radar was produced by Westinghouse.

Original variants of the Bomarc could reach a speed of 1,975 miles per hour (3,658 kilometers per hour), had a range of 260 statute miles (418 kilometers), and could reach an altitude of 65,000 feet (19,812 meters). The Bomarc B had a range of 440 miles (708 kilometers) and could reach 100,000 feet (30,480 meters). Slightly heavier, it weighed 16,032 pounds (7,272 kilograms. During testing, the missile could reach Mach 4.

The Bomarc was in operational service from 1959 until 1970. As originally planned, the Bomarc would be based at 52 sites within the United States and Canada, with 120 missiles each, but in actuality, there were only eight sites in the U.S. and two in Canada. Boeing produce 260 Bomarc As, and 570 Bomarc Bs.