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).
Series of graphs showing temperature effects and air vent modifications on a damper's pressure.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan073 | |
| Date | 9th July 1928 guessed | |
| SHEET I H.P. 80 LBS/SQ IN 60 13" LEVER 200 CYCLES / MIN MARGIN FOR FILING [Left Column] Lbs/sq in FIG I: 19°C, Slow Running, 42°C FIG II: 54°C FIG III: 61°C FIG IV STANDARD DAMPER. AIR VENT .018 TEMP EFFECTS ON H.P. SIDE OF DAMPER [Middle Column] HIGH PRESSURE FIG V: AIR VENT HOLE .032" DIA., 18°C, Slow Running HIGH PRESSURE FIG VI: TWO .032" DIA AIR VENTS IN SERIES, 19°C, Slow Running VARIOUS TYPES OF AIR VENT H.P. CAP HIGH PRESSURE FIG VII: AIR VENT IN H.P. CAP BLOCKED UP, 18°C, Slow Running EFFECT OF BLOCKING UP AIR VENT MODIFICATIONS TO AIR VENT [Right Column] HIGH PRESSURE FIG IX: NO AIR VENT SINGLE DIAGRAM, TAKEN FROM COLD, 18°C AS ABOVE INTERNAL DAMPER FIG X: PRESSURE BUILDS UP AFTER A DOZEN CYCLES GRADUAL PRESSURE RISE DUE TO TEMPERATURE LOW PRESSURE FIG VIII: AIR VENT IN H.P. CAP BLOCKED UP, Slow Running [Y-axis values for all graphs]: 200, 100, 0 | ||