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).
Graph plotting measured valve lift and derived velocity curves against an unspecified x-axis.
| Identifier | ExFiles\Box 179\3\ img006 | |
| Date | 29th February 1932 guessed | |
| .001 INS / DIV / DIV AT 3000 R.P.M = 1680 Fss., (CURVES DERIVED FROM MEASURED) VALVE LIFT, LIFT - INS, .40, .35, .30, .25, .20, .15, .10, VELOCITY - INS PER DIV, .040, .035, .030, .025, .020, .015, .010 | ||