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).
Flywheels for B.III units numbers 6 and 7.
| Identifier | ExFiles\Box 99\1\ scan0086 | |
| Date | 11th November 1938 | |
| H12 HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel} Rm{William Robotham - Chief Engineer}/NRC{N. R. Chandler} H/MH.{M. Huckerby} 11.11.38. Flywheels. B.III units Nos 6 and 7. in file Hoob. | ||