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 results for a hydraulic shock damper with various restriction configurations, pressures, and temperatures.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan078 | |
| Date | 21th March 1928 | |
| HYDRAULIC SHOCK DAMPER TESTS. SPEED 200 R.P.M. STROKE 6" Low PRESSURE LOAD 55 LB. HIGH PRESSURE LOAD 60 LB. COMPRESSOR OIL EQUIVALENT PISTON VELOCITY 14"/SEC. Low PRESSURE:- ONLY ONE RELIEF PASSAGE IN THE PISTON, THE OTHER BEING BLOCKED UP. LOW PRESSURE RESTRICTION. TEST 1 L. SIX RESTRICTIONS :- d" = .125" D" = .250" PRESSURE 950 LB/□" TEST 2 L. FOUR RESTRICTIONS:- d" = .125" D" = .250 PRESSURE 850 LB/□" TEST 3 L. THREE RESTRICTIONS:- d" = .125" D" = .250" PRESSURE 750-800 LB/□" TEST 4 L. FOUR RESTRICTIONS :- d" = .125" D" = .500" PRESSURE 900 LB/□" DISTANCE PIECE. TEST 5 L. THREE RESTRICTIONS:- d" = .125" D" = .750" PRESSURE 800-850 LB/□" TEST 6 L. SIX RESTRICTIONS :- d" = .137" D" = .250" PRESSURE 700-750 LB/□" THE ARRANGEMENT SHOWN IN TEST 5 IS APPARENTLY THE MOST SUITABLE FOR THE REQUIRED CONDITIONS. i.e. 800 LB/□" AT 200 R.P.M. WITH 6" STROKE. THE FOLLOWING TABLE SHOWS THE TEMPERATURE - PRESSURE VARIATION. TEST 7 L. TABLE: | T2 AIR TEMP C° = T1 - 10°C | OIL TEMP T1 °C | LOW PRESSURE (LB/□") | |---|---|---| | 1° | 11 | 800 | | 23° | 33 | 800 | | 33° | 43 | 785 | | 48° | 58 | 775 | | 60° | 70 | 750 | LIMIT OR WORKING TEMP. | ||