Atlas ICBM Missile Weapon System Technical Manual 12+

📘 The first ICBM to be developed and deployed by the United States, the Atlas had a range of 5500 nautical miles and could achieve a speed of 15,500 mph. Depending on configuration, it could be equipped with either a W-49 (1.45 megaton) or W-38 (4.5 megaton) thermonuclear warhead. The Atlas' development can be traced to a series of research and development studies performed in the wake of WWII by the Convair company. These led to the company winning a contract in 1951 for a long range missile. The three-engine XSM-65A design that eventually emerged featured a thin skin, inflated by internal fuel pressure like a balloon, and had "one and a half" stages. In this configuration, both the main booster and sustainer engines ignited at lift-off, with the boosters dropped in flight. (This unique feature was intended to make certain the sustainer engine could fire at high altitudes, something later determined to not be a problem). The missile burned kerosene and liquid oxygen fuel, and relied on a radio-command / inertial guidance system. After some teething problems including the loss of the prototype Atlas, the missile flew successfully on December 17, 1957. A little under two years later,the first USAF Atlas ICBM squadron consisting of three missiles on unprotected pads was activated at Vandenburg AFB. Subsequent deployments featured hardened "coffins" in which the missile would be stored horizontally. After a launch order was issued, the Atlas would be raised, fu...