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).
Mechanics of a braking system and refuting a claim about a swinging arm.
| Identifier | ExFiles\Box 66\5\ scan0130 | |
| Date | 31th October 1927 | |
| X8420 To OY. from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Hs{Lord Ernest Hives - Chair}/Rnl/LG31.10.27. X8370 With reference to your OY2/R102527. I think that we do not quite agree with your remarks possibly because we have included one or two modifications in our system that you do not have in yours. In your first para. you say "Because we have no assurance that the arm will swing at all when applying the brakes". This is hardly so as you will see from the attached sketch, the secret of always returning it to the same position being the stop X and the rod R.{Sir Henry Royce} Due to the unequal leverage to the front and rear brakes the swinging links must always move unless by a peculiar coincidence the clearance on the front and rear brakes respectively is exactly in inverse proportion to their leverage. If this ever happens the clearances of the front brakes are badly in need of adjustment. Actually we have not met a case because the front brakes wear so little. We do find that 25 lbs. at the end of the swinging arm S. is the desirable quantity of friction. Attached is our Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}5/LG11.2.27 which is further explanatory. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||