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).
Failed chassis pressure ring, attributing the cause to centrifugal effects and noting a new material standardisation.
| Identifier | ExFiles\Box 103\1\ scan0079 | |
| Date | 5th March 1934 | |
| GRY{Shadwell Grylls} Mx.{John H Maddocks - Chief Proving Officer} [crossed out] c.Hs.{Lord Ernest Hives - Chair} S.Ftr. X5300 BY/EM5/J.5.3.34. See me 20/25 HP. Chassis Pressure Ring G.55792. WS We are in receipt of your memo reference Mx{John H Maddocks - Chief Proving Officer}21/T.1.3.34, and have examined the pressure ring submitted to us. We are of opinion that the failure is due to centrifugal effects and that there is no fault with the material. You are no doubt aware that a standardisation sheet has been introduced to make these pressure rings both on the 20/25 HP. and Bentley chassis in 3½% Nickel Steel. BY [signature] | ||