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).
The engine failure of chassis B.174.EF, detailing required replacement parts and a post-dismantling inspection report.
| Identifier | ExFiles\Box 146\1\ scan0308 | |
| Date | 8th July 1938 | |
| 1245 To BENTLEY MOTORS Ltd. Derby copy to Rm.{William Robotham - Chief Engineer} Levallois Sr/VAIO/GM.8.7.38 re: CHASSIS B.174.EF - Mme RUEFF Total mileage as per speedometer reading 26138 miles We think that Rm.{William Robotham - Chief Engineer} after his recent visit to Rue Gide, will have told you about the failure of N°. 5 connecting rod on this car, which has unfortunately caused very expensive damage to the engine, which will necessitate replacing the following principle parts :- Upper and lower halves of crankcase. Cylinder block. Camshaft. 2 camshaft bearings. 3 pistons. 1 connecting rod. 2 balance weights of crankshaft. We have to-day ordered the necessary parts from Works. After the dismantling of the engine, we found the crankshaft and bearings to be in a very good condition. The following is our report upon the engine. 1 2 3 4 5 6 7 Max:dia: main journals { 2"247 2"2475 2"2475 2"2475 2"247 2"2475 2"247 Min. dia. ) .247 .247 .247 .247 .247 .247 .247 Ovality ( .000 .0005 .0005 .0005 .000 .0005 .000 Dia. of the { 1"998 1"998 1"998 1"998 1"998 1"998 crankpins ) 1"9975 1"996 x Internal dia. { _of main bea- } 2"250 2"250 2"2505 2"2505 2"2505 2"250 2"250 rings . { Bow at centre( of crankshaft) "004" MAIN BEARINGS:-Please refer to attached photograph. Condition CONDITION :- of surface OK. with the exception of n°. 4 on which small chunks of metal are missing, these came adrift when removing the bearings. ***** | ||