SM-65 Atlas Inter-Continental Ballistic Missile System 1956-1965
W-49 Thermonuclear Warhead
Payload Device for Atlas D Missiles
NOTE: ALL INFORMATION INCLUDED ON THIS PAGE HAS BEEN DECLASSIFIED AND IS AVAILABLE IN THE PUBLIC DOMAIN. NO INFORMATION OR DOCUMENTS CONTAIN ANY CLASSIFIED INFORMATION OF ANY KIND.
Nominal Yield 1: 1.1 Megatons (91 times Hiroshima - 12 Kilotons)
Nominal Yield 2: 1.44 Megatons (120 times Hiroshima - 12 Kilotons)
Weight: 1,640-1,680 lbs.
Development: Mid-1956 to March 1958
Designed By: Los Alamos National Laboratory
Number Built: Approx. 40 (For Atlas)
Manufactured: September 1958 thru 1964
In Service: 1958 thru 1965
Retired: November 1962 thru April 1975
Deployment: 24 Atlas D launchers
Length: 54.2 inches
Diameter: 20 inches
Detonation Mechanism: Contact or Airburst
Re-Entry Vehicles Used: Avco Mark 2 (Heat Sink) and Avco Mark 3 (Ablative)
Mark49 Warhead
Documents
History of Mk 49 Warhead - January 1968 (Sandia Labs)
W-49 History and Information (Courtesy of Grok )