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).
Modifications to address 'servo jaggers' on 20 HP and 40/50 models.
| Identifier | ExFiles\Box 105\4\ scan0023 | |
| Date | 25th August 1925 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} /5370 R1/M25.8.25. c. to CJ. BY.{R.W. Bailey - Chief Engineer} BN.{W.O. Bentley / Mr Barrington} RE. SERVO JAGGERS. 20 HP. and 40/50. X.8370 X.8370 Apparently the less effective cams reduce the tendency for servo jaggers, but Hancock in Frances says too much foot pressure is required. If this is confirmed I suggest we go back to large cam at 45°. The other modifications possible are slower speed servo - try 25% to 50% reduction - this would be much preferred if it had no other disadvantages. The only other idea is a dash-pot under the servo balance lever - SEE ORIGINAL FOR SKETCH. R.{Sir Henry Royce} | ||