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 four graphs analysing oil pressure, velocity, viscosity, and temperature under different conditions.
| Identifier | ExFiles\Box 16\7\ Scan034 | |
| Date | 16th November 1927 guessed | |
| FIG. B GRAPH I OIL PRESS. LBS. SQ." AXLE VEL. 3FT/SEC A B C PRESS L.P. VALVE OPENS COMPRESSOR OIL 20°C 2" STROKE INS. 120 R.P.M. INCREASE IN VELOCITY PRESSURE FACTOR DUE TO VARIOUS SPACING OF ORIFICES NOTE L.P. VALVE DOES NOT OPEN FOR SLOW 2" STROKES GRAPH II OIL PRESS. LBS. SQ." FRONT AXLE VEL. FT/SEC. COMPRESSOR OIL USED AT 20°C C 2" STROKE 4" STROKE 6" STROKE SHOWS MAX. PRESS. ATTAINED DOES NOT VARY VERY MUCH WHETHER PRODUCED BY LONG SLOW STROKES OR BY SHORT QUICK ONES GIVING SAME AXLE VELOCITY. GRAPH III OIL PRESS. LBS. SQ." OIL TEMP. C° AXLE VEL. 7.8 FT/SEC A DROP 15% COMPRESSOR OIL C DROP 10% DROP IN VELOCITY PRESSURE INCREASE FACTOR DUE TO FALL IN OIL VISCOSITY. PRICES MOTORINE C° TRIED ALSO AT 15°C WITH NO FURTHER PRESS. RISE. GRAPH IV OIL TEMP. C° TIME OF EFFLUX SECS VISCOSITY CURVES PRICES MOTORINE COMPRESSOR OIL .180 .098 .125 .250 .100 .450 ACTUAL DIMENSIONS OF RESTRICTION A WASHERS & DISTANCE PIECES RE-ARRANGED FOR B & C. | ||