Air Force Museum
Mark 41 Thermonuclear Bomb
The Mark 41 represented the enormous destructive power at the center of early Cold War nuclear deterrence. Designed when strategic planners sought weapons of unprecedented yield, the bomb was carried by heavy bombers as part of a force intended to prevent war by making the cost of attack unmistakable. Its presence also reveals the technical and moral weight placed on aircrews, maintainers, and command systems during round-the-clock alert operations.
In depth
History & service
The Mk-41 "hydrogen" bomb, first produced in 1960, is now obsolete and no longer in USAF service. Designed to be carried by B-47, B-52 and B-70 aircraft, it was to be released at high-altitude, using parachutes to retard its fall, thereby permitting the releasing plane to escape from the target area safely.
The parachutes used for this 10,500-pound bomb were one 5-foot pilot chute and one 16.5-foot ribbon chute. Having either and air or contact burst option, the Mk-41 was in the megaton yield range.
Details that tell the story
Thermonuclear weapon developed for Strategic Air Command · Designed for carriage by heavy bombers · Part of the United States nuclear stockpile during the 1960s
Readiness became a permanent condition
During the Cold War, aviation was organized around the possibility of a conflict that governments hoped to prevent. Bombers, missiles, interceptors, reconnaissance aircraft, warning networks, and tankers became parts of interdependent systems. Their value was judged not only by what they could do in flight, but by how reliably they could be maintained, alerted, launched, supported, and controlled.
This emphasis produced striking aircraft and difficult tradeoffs. Long range demanded fuel and support. High speed increased heat and mechanical stress. Sophisticated electronics offered new capabilities but created new maintenance requirements. A reconnaissance aircraft needed an effective camera and a workable route as well as altitude or speed. An interceptor depended on warning and guidance before its pilot could make an engagement.
The human experience included long periods of training and routine punctuated by crises. Crews and ground personnel practiced procedures whose purpose was to remain credible without being used in war. At the same time, military aviation carried out reconnaissance, transport, rescue, humanitarian missions, and conventional operations around the world. Linking these aircraft with civil airliners, research machines, and spacecraft reveals a history of shared technologies and different purposes. The machines embody technical accomplishment, but also the enormous resources and sustained human effort required to keep a global force ready.
