From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The construction of two 40mm Type BB automatic guns for aircraft from existing experimental units.
| Identifier | ExFiles\Box 176\1\ img058 | |
| Date | 3rd September 1940 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Ve. c. to Rm.{William Robotham - Chief Engineer} 5 Ve/NP.5/CB.3.9.40. 40 mm. TYPE BB AUTOMATIC GUNS FOR AIRCRAFT. In reply to HPS.{Horace Percy Smith - Experimental Factory Mgr}1/EP.{G. Eric Platford - Chief Quality Engineer}30.8.40, our memo Ve.6/CB.23.8.40 was intended to convey that no new automatic guns should be made. The two guns mentioned in Rm.{William Robotham - Chief Engineer}8/ML.5.8.40, page 2, are to be built up from 2 of the 3 experimental guns now in the Shop at Sinfin. Specifications to cover this work were issued under Ve/NP.6/CB.13.8.40 (specifications Nos. Ve/NP.7/CB.13.8.40 and Ve/FH.1/CB.9.8.40). P.T.O. | ||