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).
Diagnosing an engine thud caused by a loose front cylinder block and proposing modifications.
| Identifier | Morton\M22\ img071 | |
| Date | 14th October 1920 | |
| 1 EX's DULL THUD. HS{Lord Ernest Hives - Chair} TELLS R.{Sir Henry Royce} WAS DUE TO FRONT CYL BLOCK NUTS BEING LOOSE/HONEST (CONFESSION). THERMOSTAT & NEW SERRATED MAG. DRIVE TO GO ON 1EX. HS{Lord Ernest Hives - Chair} PROPOSES TO BRING TO WW 30-10-30. BRING 'SAMPLES': IGN LOCK SWITCH, NEW DIST. BOARD, GOS G/BOX. COMPLETE PARTS OF 3-SPEED G/BOX FOR 40/50. RE 1.EX CAR. ORIGINAL RECEIVED OCT 16 1920 To R.{Sir Henry Royce} From HS.{Lord Ernest Hives - Chair} c.c. to C. c.c. to BN.{W.O. Bentley / Mr Barrington} c.c. to E.{Mr Elliott - Chief Engineer} c.c. to F.{Mr Friese} c.c. to L. X.3763. With reference to the thud on this engine, we found this was due to the front cylinder block being loose. Some of the nuts were half a turn slack. As we have never known a case of the cylinder block coming loose when once being properly tightened up, we can only assume that the nuts had never been properly tightened when the engine was down to fit the 6-ringed pistons. Because of them not being properly tightened they gradually worked more slack with running. Whilst we have the car here we are fitting to it the Thermostat Control and the new type Magneto Drive. I propose bringing this car to West WitteringHenry Royce's home town arriving there the first thing on Wednesday morning the 20th. inst. We shall bring on the car samples of the new lock ignition switch, new Distribution Board, parts of the 3-speed Gearbox for the 40/50 chassis and Goshawk gearbox complete. Hs.{Lord Ernest Hives - Chair} R.R. 285A (100) (T) S.H 169. 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 | ||