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 a 110° shaft (H.S.970) against a normal 107° shaft (E.100863) to improve slow running.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page066 | |
| Date | 21th June 1933 guessed | |
| COMPARISON OF 110° SHAFT INTENDED TO IMPROVE SLOW RUNNING AND NORMAL 107° E.100863. LARGE PEREGRINE CARB: INDUCTION PIPE E.100958 WITH POCKET FILLED IN. SLEEVE FITTED IN INDUCTION PIPE TAPERING FROM 1·750 TO 1·500" DIA: LARGE VALVE TURBULENT HEAD. 6·25 C/R.{Sir Henry Royce} E.100863 H.S.970 B.H.P. B.M.E.P. LBS/SQ.IN M.P.H. Diagram 1 (Left): IA. 5A. H.S. 970 110° Ex. IN. ·020 44 40 Diagram 2 (Right): R 5 E.100863 107° Ex. IN. ·020 34 42 | ||