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).
Cracks found in the leaves of an O.S. spring and notes on related components.
| Identifier | ExFiles\Box 71\4\ scan0200 | |
| Date | 8th May 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: GWH{George W. Hancock - Head Chateauroux}1/Crn8.5.25. O.S. Spring (Firths) to Drg. F.71975 - 1150 lbs. Leaves. Condition. Where cracked. Aprox. length of crack. 1 O.K. 2 Cracked. 1" rear of centre bolt - outside. 1/2" 3 " 1" " " each side. 1/2" 4 " 1" " " " 1/2" 5 " 1" " " outside. 1" 6 " 1" " " " 1/2" 7 " 1" " " " 1" 8 " 1" " " " right across. 9 " 1½" either side of centre bolt, outside. 1/2" 10 " 2" rear of centre bolt. right across. 11 " 1½" " " " right across. outside. Rear. [diagram] Front. inside. Springs to Drg.F.71975 - 1100 and 1150 lbs. fitted. Shackle pins N.S.F. spring - these are in good condition. O.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 contd :- | ||