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).
Request to machine six Aerolite pistons for Bentley engines to drawing Rm.216 to fit American piston rings.
| Identifier | ExFiles\Box 87\2\ scan0250 | |
| Date | 12th July 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} 236 Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews}9/JH.12.7.37. Bentley Pistons. Will you please arrange to have machined to drawing Rm.{William Robotham - Chief Engineer}216, six aerolite pistons. Rm.{William Robotham - Chief Engineer}216 is modification to ring grooves in order that American piston rings can be fitted. Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews} | ||