It's the compartment where a B-52's ordnance is carried & from which it's dropped
... With its engines 
carried in nacelles under the swept wing, the B-47 was a... [DOC] [TLE] F-22 Weapons - GlobalSecurity.org [PAR] Jan 22, 2016 ... For its air-to-ground role, the F-22 can internally carry two 1000 pound-class Joint 
Direct Attack ... doors that run the length of the compartment and are hinged at 
the top and bottom of the bay.