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).
Failure analysis report for a 3½ Litre Bentley Chassis fan, detailing the cause and proposed remedies.
| Identifier | ExFiles\Box 86\5\ scan0013 | |
| Date | 5th January 1934 | |
| GWH{George W. Hancock - Head Chateauroux} See me Hk{Col. T. Harker - Sales} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} C. Max. BY.6/G.5.1.34. X 224 3½ LITRE BENTLEY CHASSIS - FAN. Mx.{John H Maddocks - Chief Proving Officer}8/T.5.1.34. From an examination of the parts, it is quite clear that the order of the failure was as follows :- (1). Rivets failed on one blade. (2). The blade was thrown off due to centrifugal force. (3). The unbalanced effects resulting immediately snapped off the fan bracket. REMEDIES :- (a). Increase size of rivets. (b). Consider Duralumin for blades instead of steel. It may be considered that the increased cost of Duralumin may be excessive, but I think it would be well worth while. I am sending the broken parts of the fan into E's office. OK BY.{R.W. Bailey - Chief Engineer} BY | ||