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).
Cylinder report detailing size measurements for six engine bores at three different points.
| Identifier | ExFiles\Box 109\5\ scan0122 | |
| Date | 1st March 1939 | |
| CYLINDER REPORT 1.3.39. WXA-1. Sg.{Arthur F. Sidgreaves - MD} Bore Size 1 Mouth............3.5005. 3.501 Centre...........3.50075. 3.5015 Crown............3.50125. 3.501 Average..........3.501. Variation... .001 2 Mouth............3.5005. 3.501 Centre...........3.501 3.5025 Crown............3.5015 3.5015 Average..........3.502 Variation... .002. 3 Mouth............3.501. 3.501 Centre...........3.5015 3.5025 Crown............3.502 3.5015 Average..........3.50175 Variation... .0015 4 Mouth............3.501 3.5015 Centre...........3.5015 3.5025 Crown............3.503 3.5025 Average..........3.502 Variation... 1002 5 Mouth............3.501 3.501 Centre...........3.5015 3.5025 Crown............3.5015 3.5025 Average..........3.50175 Variation... .0015 6 Mouth............3.501 3.501 Centre...........3.5015 3.502 Crown............3.5025 3.5025 Average..........3.50175 Variation... .0015 | ||