Solutions for servo brake judder on 20.HP and 40/50 models, including changes to cams and adding a dash-pot.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan149 | |
| Date | 25th August 1925 | |
| Misc BRAKES + R ORIGINAL TO HS. {Lord Ernest Hives - Chair} FROM R. {Sir Henry Royce} Copy to re. SERVO JAGGERS. 20.HP. AND 40/50. +8370 T5370 Apparently the less effective cams reduce the tendency for servo jaggers, but Hancock in France 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 - R. {Sir Henry Royce} | ||
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).