'Weapon of Offence'Invented by Frederick Marten Hale in 1913, the 20lb Hale bomb was reportedly the only high-explosive aerial bomb available to British forces at the start of WW1. Hale’s bombs were dropped in some of the Royal Naval Air Service’s first strategic bombing raids, the first destruction of a Zeppelin in aerial combat, and the first sinking of a U-boat by airplane. The Hale's 20lb bomb remained in regular use on the Western Front through the summer of 1917, until inventory had been exhausted.
Among the aircraft known to have been armed with this type are the Avro 504, Bristol Scout, Martinsyde S.1; Royal Aircraft Factory B.E.2, B.E.12, F.E.2 R.E.5, and R.E.7; Short Admiralty Type 74; Sopwith Tabloid, Schneider and Baby; and the Wight A.1 Improved Navyplane. Does anyone know of any other aircraft to use these bombs? Below are two 3D renderings of the 20lb Hale that I've created.
(from the The Argus, 1 June 1915):


