This interface standard applies to fuzes used in airborne weapons that use a 3-Inch Fuze Well. It defines:a. Physical envelope of the fuze well at the interface with the fuze.
b. Load bearing surfaces of the fuze well.
c. Physical envelope of the fuze and its connector.
d. Mechanical features (e.g. clocking feature).
e. Connector type, size, location and orientation.
f. Retaining ring and its mechanical features (e.g. thread, tool interface).
g. Physical envelope of the retaining ring at the interface with the fuze.
h. Physical space available for installation tools.
i. Torque that the installation tool shall be capable of providing.
This standard does not address:j. Materials used or their properties.
k. Protective finish.
l. Physical environment of the weapon.
m. Explosive interface or features (e.g. insensitive munitions (IM) mitigation).
n. Charging tube.
o. Torque on the retaining ring or loads on the load bearing surfaces.
Each fuze and weapon combination should be evaluated to ensure that the weapon system will satisfy all safety, reliability, and performance requirements throughout its lifecycle.
The SAE International (SAE) AS-1 Steering Group, Aircraft Systems and System Integration, formed SAE AS-1B7, Fuze Mechanical Task Group, to generate an Aerospace Standard (AS) to support interoperability and interchangeability of airborne weapons and their fuzes. This effort was initiated in response to a request made to the SAE AS-1 Steering Group by the North Atlantic Treaty Organization (NATO) Air Armament Panel for AS-1 to undertake a study or series of studies related to airborne weapons fuze standardization.
The specific charter of the Fuze Mechanical Task Group is to: “Study, define and develop standards and standards related documents for airborne mechanical fuze interfaces such as fuze wells, mechanical safety linkages and fuze associated components in order to achieve airborne fuzing systems interoperability.”
This standard addresses the 3-Inch Fuze Well, as this is the most common size currently used by airborne weapons of NATO countries with field installable fuzes.