consisted of 465,000 individual elements stacked to form 27,000 airflow channels; the design with small unattached elements reduced problems related with thermal stresses. The elements were designed for average operation temperature of ; the autoignition temperature of the reactor base plates was only 150 °C higher. The neutron flux was calculated to be 9×1017 neutrons/(cm2·s) in the aft and 7×1014 neutrons/(cm2·s) in the nose. The gamma radiation level was fairly high due to the lack of shielding; radiation hardening for the guidance electronics had to be designed. The reactors were successfully tested at Jackass Flats in the Nevada Test Site. The Tory II-A reactor, the scaled-down variant, was tested in mid-1961 and successfully ran for several seconds on May 14, 1961. A full-scale variant, the Tory II-C, was run for almost 5 minutes at full power. The latter test, limited by the air storage facility capacity, ran for 292 seconds. The air fed to the reactor was preheated to and compressed to , to simulate ramjet flight conditions. See also The Lost Missile – a 1958 film focusing on a similar weapon 9M730 Burevestnik – a Russian nuclear-powered cruise missile List of nuclear-powered aircraft References External links "The Flying Crowbar" from Air & Space magazine, April/May 1990, Volume 5, No. 1, page 28 Vought SLAM entry in the Directory of U.S. Military Rockets and Missiles Abandoned military rocket and missile projects of the United States Cold War missiles of the United States Cruise missiles of the Cold War Nuclear cruise missiles of the United States Nuclear-powered aircraft