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).
Operation and components of the braking system, specifically the Tee-equalizer arm.
| Identifier | ExFiles\Box 66\5\ scan0121 | |
| Date | 15th October 1927 | |
| X8420 OY2.R.102527 October 15th, 1927. TO Mr. Caswell Mr. Ainsworth Mr. Soutter cc - Mr. Bagnall Mr. Nadin Mr. Burton Mr. Poole cc H Mr. Bailey Mr. Hives RE: BRAKES Regarding my note OY4.R.10527 proposing that we might find a benefit from increasing the amount of friction in the Tee-equalizer arm as done in England, on further consideration I do not think this is likely to give any real benefit in brake operation because we have no assurance that the arm will swing at all when applying the brakes. I have tried to go into this more fully than we have previously attempted, in the attached sketches. I think this material might be useful for our depots. S.K.-121 shows diagrammatically the complete braking system, and the division of the system into its four parts, the "foot-pedal" system, the "rear brake" system, the "front brake" system, and the "servo" system. I have tried to show that when the brake is off the first three systems are held in definite positions by springs and stops, but the fourth is not so positively controlled. FOOT PEDAL SYSTEM Consists of pedal with shaft and operating lever on L.H. side of frame, pull rod, outer cam lever, and spiral spring which pulls the whole system back against the front gearbox cross-member when brake is off. REAR BRAKE SYSTEM Consists of inner cam lever, pull rod, "pick-up" shaft with the two fixed levers mounted thereon, links to differential, rear equalizer, brake ropes, levers on rear axle and "pull-off" springs on rear axle. This system is held rigid when not in use by the pull-off springs acting against the stop on the rear brake differential. (Continued) | ||