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).
Cracked fan hub on chassis B.80.EF, attributing the failure to an overtight ball bearing.
| Identifier | ExFiles\Box 27a\1\ Scan422 | |
| Date | 5th May 1936 | |
| Sr/VA5/ET.5.5.36 - 2 - CHASSIS B.80.EF - Col. LINDEMANN - Upon examination of the fan of this car on the 20.II.35, we discovered that the EB.I644 fan hub was cracked. The car had then covered a mileage of 3000 Kms. We fitted a new hub and rebalanced the fan. The failure occurred near the housing for the Ho.IIO Hoffman ball bearing. We think the trouble was due to the bearing being too tight in the housing, which caused the metal to split. We trust that you will find the above quite clear. Sr/VA.VA | ||