The Keystone LB-5 (originally ordered under the Huff-Daland name) was a bomber aircraft produced in the United States in the late 1920s.

Its manufacturer nicknamed it the Pirate, but this name was not officially adopted by the United States Army Air Corps (USAAC).

The LB-5 was a member of the family of closely related bomber designs that had debuted with the XLB-1 in 1923, and as such, was a large, single-bay, conventional biplane.

Shrapnel sprayed the five-man crew, which included 2nd Bombardment Group commander Major Lewis H. Brereton, flying co-pilot, and all except the nosegunner immediately parachuted.

[1] Data from National Museum of the United States Air Force[2]General characteristics Performance Armament