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).
Test report on re-designed stiffer front springs for a 9-FK car, detailing troubles, mileage, and remedies.
| Identifier | Morton\M20.3\ img051 | |
| Date | 25th September 1924 | |
| SHEET 14. TEST NO. X111. FIRTHS RE-DESIGNED 12½% STIFFER FRONT SPRINGS - 9-FK CAR. REF: | Expl. No. | TROUBLES | MILEAGE | CAUSE OR REMEDY --- | --- | --- | --- | --- | | Main cyl. extra oil pipe broken. | 1259 | Short circuit in switch box. | | Electrical system failed. | 2361 | Broken wire. | | Water in petrol system. | 2611 | Purchased petrol contained water. A.T. | | A.T. speedometer mileage recorder not functioning. | 27321 | Several teeth stripped off driving pinion of mileage indicator. | | N.S. rear brake rope nearly frayed through where it passes through spring support bracket. | 6540 | New brake rope made and fitted. | | Inside support brkt. for O.S. rear spring king-pin broken. | 7383 | | No.5. | No. 5. big end bearing run. | 9911 | No. 5. piston taken out and test finished on 5 cylinders. | | Windscreen broken. Front wing stay broken (twice). Front wings continually splitting. | | MILEAGE OF TEST - 10,458 - AVERAGE SPEED 34.23 M.P.H. At the end of this test the brakes on this car had completed 31,080 miles. The work done on them being only - one new rear brake rope fitted and rear brakes re-lined once. Front brake toggle actuating shafts were very loose in their bearings. Also both leading shoe toggle pins were very loose in the brake shoes - the hole in the brake shoes having enlarged considerably. AJL. EXPERIMENTAL REPORT. R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. | ||