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 sheet detailing troubles encountered with Woodheads 20% stiffer front springs on 9-PK & 98-NK cars.
| Identifier | ExFiles\Box 73\3\ scan0264 | |
| Date | 11th December 1924 guessed | |
| SHEET 10. TEST NO. V111. WOODHEADS 20% STIFFER FRONT SPRINGS - 9-PK & 98-NK CARS. TROUBLES. | MILEAGE. | CAUSE OR REMEDY. Servo jaggers occurred intermittently during the test. Down pipe flange broken away from front silencer. | 12,118 | Down pipe flange and manifold union not in line. Step iron broken. | 6,664 Hartford shock absorber arms buckled. | 17,997 Steering pendulum lever loose on its splines. | 18,253 Engine seized up but afterwards freed itself. | 18,609 | No.4 big end bearing seized temporarily. Main cyl. extra oil pipe broken. | 8,013 No. 4 big end bearing failed. | 20,622 | Front springs transferred to 98-NK and 10,000 miles test concluded. Windscreen frame broken. Glass broken Front wing stay broken (twice) Front wings split continually. Wheel carriers broken (twice). Scuttle frame broken (twice). MILEAGE OF TEST - 10,013 - AVERAGE SPEED 34.5 m.p.h. 9-PK engine bearings overhauled. Body overhauled. steering overhauled. New steering nut fitted. 20,622 miles. Brakes not touched. | ||