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).
Wear measurements for an engine's crankshaft journals, crank pins, and cylinders.
| Identifier | WestWitteringFiles\K\November1923\ Scan17 | |
| Date | 8th November 1923 guessed | |
| WEAR ON ENGINE. CRANKSHAFT JOURNALS - standard size 1.9995". MAIN JOURNALS. | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |---|---|---|---|---|---|---|---| | Max. dia. | 1.9985" | 1.9985" | 1.9985" | 1.999" | 1.998" | 1.9975" | 1.9985" | | Min. dia. | 1.997" | 1.9985" | 1.9985" | 1.9957" | 1.9975" | 1.9975" | 1.997" | The worst wear is in No.4 Journal which is - .00375" CRANK PINS - standard size 1.4995". | | 1 | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---|---| | Dia. of Crank pins. | 1.4985" | 1.4985" | 1.499" | 1.4985" | 1.499" | 1.4985" | CYLINDERS - standard size 3.000" + 1 | | 1 | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---|---| | Top. | 3.001 | 3.000 | 3.001 | 3.0005 | 3.0015 | 3.002 | | Centre. | 3.002 | 3.0015" | 3.002 | 3.0015" | 3.002 | 3.002 | | Bottom. | 3.001 | 3.0005" | 3.001 | 3.0015" | 3.001 | 3.0015" | | ||