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).
Improvements to a brake dust cover to prevent mud and water ingress, recommending a new design and the use of solid rivets.
| Identifier | ExFiles\Box 5\3\ 03-page216 | |
| Date | 1st February 1925 guessed | |
| contd :- -4- inner edge of the brake drum, entering directly between the edge of the dust cover and the drum. In order to prevent mud being thrown in direct, a ring was made and riveted to the dust cover employed in the previous test as shewn in Fig.lV. A.{Mr Adams} This was found to be very satisfactory, very little mud penetrating to the brakes. The improvement is estimated at 80% over standard. The ring was then adapted to standard brake dust covers as shewn at B. in Fig.lV. and a further slight improvement resulted owing A B Fig IV. to the introduction of another change of direction necessary to any mud before entering the brake drum. Tests have been carried out under extreme conditions on this latter type of dirt excluder with very satisfactory results. Owing to the troubles lately experienced due to foreign matter penetrating the brake gear and to the adaptability of the additional flange to the standard dust cover, it is recommended that this method is adopted as standard practice. It was also noticed that water penetrates the dust cover via the hollow copper rivets used for attaching the brake actuating camshaft to the dust cover; dt is therefore recommended that solid rivets be used for this purpose. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||