The Mark 21 nuclear bomb was a United States thermonuclear gravity bomb first produced in 1955. It was based on the TX 21 "Shrimp" prototype that had been detonated during the …

2023年10月31日 · WASHINGTON — Lockheed Martin has been awarded nearly $1 billion to develop a new reentry vehicle for the LGM-35A Sentinel intercontinental ballistic missile …

The Mk-21 reentry vehicle (RV) used with the W87 warhead was previously known as the ABRV, Advanced Ballistic Reentry Vehicle, designed by AVCO Systems Division. This RV affords the …

The Mark 21 free-fall nuclear bomb was adopted in service in 1955. It was developed on the basis of the prototype TX-21 "Shrimp", which was tested in March 1954 (the Castle Bravo test).

2024年6月18日 · After attaining full operational capability, the Mk21A RV will be integrated on the nation’s intercontinental ballistic missile weapon system. The Mk21A program is currently in …

Mark 21 or Mk XXI or variation, may refer to:

2024年6月18日 · Mk21A is the U.S. Air Force’s integrated reentry vehicle and the critical front-end of the service’s future intercontinental ballistic missile (ICBM) weapon system. This flight test …

2024年4月18日 · The Mark 21 fuze, an integrated assembly of Sandia-designed logic and sensing devices directs the warhead to initiate firing sequences at the correct point in targeting …

2024年6月19日 · It will carry the future ICBM payload — the W87-1 nuclear warhead, an upgrade on the W87 carried by the operational Minuteman III ICBM Mk 21 reentry vehicle. Work is …

2019年10月17日 · The Air Force has awarded Lockheed Martin a $108 million contract for the Mk21A reentry vehicle -- a platform that's intended to deliver the W87-1 warhead from the …