The 2000-mile test run of a new set of Phantom III pistons, including dismantling for inspection.
| Identifier | ExFiles\Box 94\5\ scan0118 | |
| Date | 25th March 1936 | |
| X336 Hs {Lord Ernest Hives - Chair} /Rm {William Robotham - Chief Engineer} from Mx. {John H Maddocks - Chief Proving Officer} Mx {John H Maddocks - Chief Proving Officer} 9/T25.3.36 Phantom III Pistons. We have completed 2000 miles on the latest set of pistons we are running on the test bed. I heard them started up cold this morning and they are very good indeed - no sign of knocks, even when "listening in". We now have the engine dismantled and the pistons have been measured, and I should be glad if you will come and see them first thing tomorrow morning - we can then re-build the engine and decide on a policy for further running. Mx {John H Maddocks - Chief Proving Officer} | ||
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).