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).
Revised damper load settings for 25 HP low rating springs.
| Identifier | ExFiles\Box 106\1\ scan0305 | |
| Date | 12th November 1931 | |
| K5410 To BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Sft.{Mr Swift} Hd.{Mr Hayward/Mr Huddy} c. to EP.{G. Eric Platford - Chief Quality Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MJ.12.11.31. X5530 BAMPER LOADS 25 HP. LOW RATING SPRINGS. In view of the Repair Dept. note on the above subject, we consider that the average setting recommended in our Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}C/KT.2.11.31 is too hard and should therefore be superseded by the following loads as an average. - for low rating springs. FRONT. Up 90 Down 115. One .044 hole H.P. valve. REAR. Up 90 Down 115. Two .038 holes in H.P. valve. In the case of old ladies and invalides, where it is definitely ascertained that high speeds are not likely to be used, the holes in the valve may be increased up to - FRONT. Two .038 Rear Two .038 } H.P. One .032 One .032 }Valve. We recommend that the loading for standard springs should be - FRONT & REAR. Up. 75 lbs.) One .032 hole Down 95 lbs.) in H.P. valve. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||