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 large and small bore induction manifolds on a 'Japan' engine with twin Zenith carburettors.
| Identifier | ExFiles\Box 102\5\ scan0044 | |
| Date | 21th May 1930 | |
| TWIN ZENITH CARBS. ON "JAPAN." COMPARISON OF LARGE & SMALL BORE INDUCTION MANIFOLD. 26 M/M CHOKES IN CARB. 5.25/1 COMPn RATIO. 116° CAMSHAFT. OPEN EXHAUST. SMALL BORE PIPE = LARGE BORE PIPE = B.H.P. B.M.E.P. R.P.M. SMALL BORE MANIFOLD LARGE BORE MANIFOLD SMALL BORE LARGE BORE QPL / 21-5-30 | ||