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).
Power output graph for a 3 1/2 Litre Bentley engine showing performance with and without a fan for the Ulster T.T. race.
| Identifier | ExFiles\Box 90a\2\ Scan287 | |
| Date | 6th July 1934 | |
| 3 1/2 LITRE BENTLEY POWER OUTPUT (ULSTER T.T.) LNT 3.4 (LOSS TO THE FAN) COMP.RATIO 7.75:1 (S.A.237 C) IN.VALVE Ex.2089 (.500" D.I.P) EX " EB.325 ( " " ) CAMSHAFT R.H.S.965 (.150" RAD. FOLLOWERS) STD INDUCTION SYSTEM. AEROLITE PISTONS. 1 WITHOUT FAN 2 WITH FAN B.H.P R.P.M. Diagram Text: T.D.C O 4° R.H.S.965 IN 35.5° B.D.C (TAPPETS .020") 57° Ex 173° GWS | ||