MIL-R-27521A, MILITARY SPECIFICATION: RECEPTACLE, FLYING BOOM, AERIAL REFUELING, GENERAL SPECIFICATION FOR (24-JUN-1971)
MIL-R-27521A, MILITARY SPECIFICATION: RECEPTACLE, FLYING BOOM, AERIAL REFUELING, GENERAL SPECIFICATION FOR (24-JUN-1971)., This specification covers the requirements for serial refueling flying boom receptacles.