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).
The condition and cracking of C.S. Springs (Firths).
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan72 | |
| Date | 1st May 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: CEN/Cm8/5.25. C.S. Spring (Firths) to Drg. F.71975 - 1150 lbs. Leaves. | Condition. | Where cracked. | Approx. length of crack. 1 | O.K. | | 2 | Cracked. | 1" rear of centre bolt & outside. | 1/2" 3 | Cracked. | 1" rear of centre bolt each side. | 1/2" 4 | Cracked. | 1" rear of centre bolt each side. | 1/2" 5 | Cracked. | 1" rear of centre bolt - outside. | 1" 6 | Cracked. | 1" " " " | 1/2" 7 | Cracked. | 1" " " " | 1" 8 | Cracked. | 1" rear of centre bolt - right across. | Right across. 9 | Cracked. | 1 1/4" either side of centre bolt - outside. | 1/2" 10 | Cracked. | 2" rear of centre bolt. | Right across. 11 | Cracked. | 1 1/4" rear of centre bolt. | Right across. Rear. | Outside | Front. Inside. Springs to drg. F.71975 - 1100 and 1150 lbs. fitted. Shackle pins M.S.F spring - these are in good condition. C.S.F.spring - rear shackle pin very badly worn underneath. This is due to the oil hole from bracket not corresponding with the hole in pin, it being a complete diameter of hole out of line. consequently this pin has never been able to be lubricated. We have ground a flat on pin, to enable it to be lubricated. UNDERSHIELD. This should be carried back further, to take care of front of gearbox and sphere, as there is quite a lot of grit and sand flung on to them. Undershield at steering would :- | ||