Blueprint detailing the performance characteristics of a hydraulic steering damper, including oil viscosity and pressure/flow analysis.
| Identifier | ExFiles\Box 17\3\ Scan118 | |
| Date | 28th January 1927 | |
| HYDRAULIC STEERING DAMPER Top Graph: OIL TEMP F DEGREES REDWOOD VISCOSITY IN SECONDS. THIN MINERAL COMPRESSOR OIL VISCOSITY 90°F 250 SECS. VISCOSITY 40°F 1600 SECS. RESISTANCE SET UP BY A GIVEN LEAK FOR A GIVEN FLOW WILL THEREFORE BE ABOUT SIX TIMES AS GREAT AT 40°F AS AT 90°F. {Mr Friese} EXTREME WORKING CONDITIONS THEREFORE IF ARRANGED FOR NORMAL TEMPS. THE LEAK IS LIKELY TO MAKE THE DAMPER INEFFECTIVE IN HOT WEATHER. Bottom Diagram & Graph: VARIABLE LEAK BACK PRESSURE ON PISTON LBS/D OIL FLOW THROUGH LEAK. PTS/MIN. FLOW OCCASIONED BY JOGGLE .055 DIA LEAK .046 DIA LEAK .039 DIA LEAK OIL TEMP 65F A. {Mr Adams} PR. {Percy H. Rose} GIVING 60 LBS LOAD CROSS STEERING TUBE RADIUS. B. PR. {Percy H. Rose} GIVING 50 LBS LOAD CROSS STEERING TUBE RADIUS. Stamp Text: RECEIVED 28 JAN 1927 DERBY | ||
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).