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).
Performance graph comparing different Aerolite pistons against standard split skirt pistons.
| Identifier | ExFiles\Box 86\2\ scan0142 | |
| Date | 6th November 1933 | |
| AEROLITE PISTONS B.V.10. SPECIFICATION - B.Z. UNIT RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel}S/A.P. 23-10-33 (ORIGINAL PISTONS 19.0 ozs) SPECIFICATION - B.Z. UNIT RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel}3/A.P. 6-11-33 (2ND SET PISTONS 18.0 ozs) * ① ORIGINAL AEROLITE PISTONS (19.0 ozs) AFTER 21 HRS ENDURANCE ② 2ND SET AEROLITE PISTONS (18.0 ozs) AFTER 19 HRS ENDURANCE ③ AVERAGE OF FIVE UNITS WITH STANDARD SPLIT SKIRT PISTONS. COMPRESSION RATIO: 6.4 : 1 * WT. REDUCTION OF A FURTHER 1 OZ IS OBTAINED BY MAKING THESE PISTONS IN R.R.53 ALLOY. Y-AXIS (LEFT): B.H.P. Y-AXIS (RIGHT): B.M.E.P. (LB./SQ.") X-AXIS: R.P.M. VALVE TIMING (.020 TAPPET CLEARANCE) DIAGRAM ①: T.D.C, 10.8, INL., 49.5, 44.0, EXH., 56.3 DIAGRAM ②: T.D.C, 30, 56, INL., 48.4, EXH. DIAGRAM ③: T.D.C, 48, 65, INL., 50.2, 50.8, EXH. | ||