Attachment of aluminium brake drums for the Wraith II model.
| Identifier | ExFiles\Box 7\7\ X 606 Brakes-page019 | |
| Date | 24th August 1936 | |
| Martindale ETOW BY. {R.W. Bailey - Chief Engineer} c.c. E.Eng.RMO. HS {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} bdo E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} 2/HP.24.8.36. Wraith II Brakes. With reference to the attachment of the aluminium brake drums to the hubs by parallel fitting bolts with flanges arranged so that the drum may be removed without removing the hub, we think that the same kind of fit between bolt and flanges as is used on the propeller shaft flanges is all that is required. That is the bolts are a push fit in the flanges. The friction between the faces may not be enough to take the maximum torque that can be applied in the reverse direction, but the application of such a torque is so rare that the occasional change over of the .002 or so, clearance is not detrimental. If the bolts are made a tight fit it will not be practicable to remove and refit the drums without removing the hubs. -1- E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).