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).
Optimal design and operation of a slow-speed brake servo.
| Identifier | Morton\M20.1\ img024 | |
| Date | 3rd May 1924 | |
| R.R. 235A (100 T) (S.H. 159. 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 ORIGINAL TO HS.{Lord Ernest Hives - Chair} & RG.{Mr Rowledge} FROM R.{Sir Henry Royce} SECRET. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. SERVO. x9910 x4214 In your early memos you indicate that the slow speed servo is required to put the brakes on slowly and regulate the speed at which the foot can put the brakes on. If this is so RRM. scheme should be alright, but in your recent memos you indicate that the foot should prevent the servo putting the brakes on quickly by not following the servo as rapidly as the servo would put the brakes on, in which case RRM. design would be at a disadvantage. If the former is correct then we are forced to used a slower and slower speed servo to prevent the shock and jaggers of putting the brakes on too quickly. If the latter is correct it scarcely matters what the speed of the servo is provided it does not wear and heat excessively. I shall be glad if you will try and weigh this up to some finality as it makes a valuable guide in our choice. If however jaggers can be safely avoided by the use of the flexible drums then RRM. with Des.60's second rod seems to be the favourite. R.{Sir Henry Royce} | ||