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).
Blueprint detailing various tests conducted on a hydraulic shock damper.
| Identifier | ExFiles\Box 68\2\ scan0221 | |
| 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 .212" DIA. d' .100" DISTANCE PIECE .210" DIA. .180" DIA. D" TEST 1L SIX RESTRICTIONS: - d' = .125" D' = .250" PRESSURE 950 LB/SQ" TEST 2L FOUR RESTRICTIONS: - d' = .125" D' = .250" PRESSURE 850 LB/SQ" TEST 3L THREE RESTRICTIONS: - d' = .125" D' = .250" PRESSURE 750 - 800 LB/SQ" TEST 4L FOUR RESTRICTIONS: - d' = .125" D' = .500" PRESSURE 900 LB/SQ" TEST 5L THREE RESTRICTIONS: - d' = .125" D' = .750" PRESSURE 800 - 850 LB/SQ" TEST 6L SIX RESTRICTIONS: - d' = .137" D' = .250" PRESSURE 700 - 750 LB/SQ" THE ARRANGEMENT SHOWN IN TEST 5 IS APPARENTLY THE MOST SUITABLE FOR THE REQUIRED CONDITIONS i.e. 800 LB/SQ" AT 200 R.P.M. WITH 6" STROKE. THE FOLLOWING TABLE SHOWS THE TEMPERATURE - PRESSURE VARIATION. TEST 7L T2 AIR TEMP C° = T1 - 10°C | OIL TEMP T1 °C | LOW PRESSURE (LB/SQ") 1° | 11 | 800 23° | 33 | 800 33° | 43 | 785 48° | 58 | 775 60° | 70 | 750 LIMIT OR WORKING TEMP. | ||