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).
Log of 20 EX steering tests using a snatchmeter to record performance under various conditions.
| Identifier | Morton\M19\ img286 | |
| Date | 20th July 1931 guessed | |
| 20 EX. STEERING TESTS USING SNATCHMETER FOR RECORDING TEST NO | CONDITIONS OF DRIVING | CONDITION OF CAR AS TESTED --- | --- | --- 1 | STEERING WHEEL HELD NORMALLY | FLEXIBLE SHACKLE. FRONT TYRES AT 60 LBS/D" STANDARD ROAD WHEELS. DRILLED DAMPER VALVES. STANDARD SIDE STEERING TUBE SPR... 2 | As 1 | As 1 BUT FRONT TYRE PRESSURES AT 35 LBS/D" EFFECT OF 1" WIDER TRACK FRONT WHEELS 3 | As 1 & 2 | As 1 BUT USING 1" WIDER TRACK WHEELS AT 35 LBS/D". (59.5" FRONT WHEEL TRACK) 4 | As 1 TO 3 | AS 2 BUT USING SOLID SIDE STEERING TUBE (NO SPR...) EFFECT OF HOLDING STEERING WHEEL LOOSELY 5 | WHEEL HELD VERY LOOSELY | AS 2 EXCEPT FOR DRIVING CONDITIONS (SHOWS EFFECT OF WHEEL CONTROL ON SNATCHMETER READING) 6 | AS 5 | AS 5 BUT SOLID SHACKLE i.e. STANDARD CAR. 7 | AS 5 & 6 | FLEXIBLE SHACKLE. PLAIN VALVES IN DAMPERS. FRONT TYRES AT 40 LBS/D" 8 | AS 5 TO 7 | AS 7 BUT WITH 2 LBS FRICTION IN COLUMN. EFFECT OF DRILLED VALVES 9 | AS 5 TO 8 | AS 7 BUT WITH 4 LBS FRICTION IN COLUMN. 10 | AS 5 TO 9 | AS 7 BUT WITH DRILLED DAMPER VALVES. FRONT TYRES '.032" DIAM. HOLES. REAR '.055" DIAM. HOLE EFFECT OF DUMBELL 11 | AS 5 TO 10 | AS 10 BUT WITH ADDITION OF 50 LBS HARTFORD SHOCK ABSORBER DAMPING ON FRONT AXLE. 12 | AS 5 TO 11 | AS 10 BUT WITH DUMBELL FITTED ACROSS FRONT DUMPER IRONS TO STOP JELLYING. 13 | AS 5 TO 12 | FLEXIBLE SHACKLE. DRILLED VALVES. STD WHEELS AT 40 LBS/D" FRONT 35 LBS/D" REAR TYRE PRESSURES. VERY WORN FRONT TYRES. STD. SIDE STEERING TUBE. NO COLUMN DAMPING. EFFECT OF FLEXIBLE SHACKLE 14 | AS 5 TO 13 | AS 13 BUT FLEXIBLE SHACKLE MADE SOLID 15 | AS 5 TO 14 | AS 14 BUT USING NEW SILENT TREAD FRONT TYRES. 16 | AS 5 TO 16 | AS 15 BUT USING NEW TRIPLE STUD TREAD BUTTRESSED TYRES | ||