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).
Inspection report detailing the condition and measurements of engine bearings, crankshaft, and crankpins.
| Identifier | ExFiles\Box 146\3\ scan0291 | |
| Date | 31th December 1936 | |
| VA5/ET.31.12.36 - 3 - N°4 Upper half - Cracked but no loss of metal. Metal has also spread. Not in a reliable condition. Lower half - In O.K. condition. N°5 Upper half - Cracked but only very slight loss of metal. Lower half - Rather badly cracked. Metal ready to break away. N°6 Upper half - Signs of cracks, but otherwise in a good condition. Lower half - Cracked in several places. No loss of metal. N°7 Upper half - O.K. No signs of any cracks. Lower half - O.K. No signs of any cracks. CRANKSHAFT I : 2 : 3 : 4 : 5 : c6 : 7 Maximum dia- : : : : : : : meter of : : : : : : : main jour- : : : : : : : nals..... 2"248 : 2"248 : 2"2475 : 2"2475 : 2"2475 : 2"2475 : 2"2475 Minimum : : : : : : : diameter.. 2"247 : 2"2475 :2"24675 :2"24675 : 2"2465 : 2"247 : 2"247 Ovality... .001 : .0005 : .00075 : .00075 : .001 : .0005 : .0005 CRANKPINS I"9985 : I"9985 : I.99875 : I"99875 : I"9985 : I"9985 : - Internal dia- : : : : : : : meter of the : : : : : : : white metal : : : : : : : bearings : : : : : : : after 10000 : : : : : : : miles..... 2"24925:2"2495 : x : 2"2495 : 2"2495 : 2"2495 : 2"2495 x We were not able to take measurements of N°3 bearing, owing to the very poor condition of the lower half. At the time we fitted the whitemetal main bearings, they were reamered out to 2.249". Please find attached our order N°1260 for the centre clutch plate which we asked you to arrange to have dispatched to us. Please also find attached our report re average speed and oil temperatures recorded, etc.. We should like to fit a high capacity oil pump to this car, but we take it that they cannot yet be supplied. VA.VA | ||