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 of piston displacement against crank angles, with blank fields for recording engine test data.
| Identifier | WestWitteringFiles\K\September1923\ Scan56 | |
| Date | 17th August 1923 | |
| RR.495A (IH) (SL119 17-8-23) MP 2755168 GII Spring Used—Rating 6.2 Diagram Area Engine ______ Cyl. No. AVERAGE Air. Temp. ________ Bar Temp. ________ Cooling Water Temp. _______ R.P.M. _______ Lbs. Lift ________ H.P. _______ I.M.E.P. _______ B.M.E.P. _______ Max. Expl. Pr.{Percy H. Rose} _______ Av. Expl. Pr.{Percy H. Rose} _______ Mechanical Efficiency_______ Indicated Vol. Efficiency_______ 1" = 6.2 lbs/sq. " ATMOS. PR.{Percy H. Rose} LINE EARLY STANDARD LATE PISTON DISPLACEMENT FOR CRANK ANGLES 0 10º 20º 30º 40º 50º 60º 70º 80º 90º 100º 110º 120º 130º 140º 150º 160º 170º 180º | ||