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 data for a Zenith carburetter with a Graham supercharger.
| Identifier | ExFiles\Box 122\1\ scan0213 | |
| Date | 5th July 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Smth. X 1034 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}9/KW.5.7.35. 3-B-IV. Zenith Carburetter 48V1-2, Graham Supercharger. R.P.M. lbs/sq.in. 1000 0.5 2000 1.25 3000 2.75 3500 3.25 3780 3.75 4000 4.25 4250 4.75 4500 5.5 HS{Lord Ernest Hives - Chair}/G.Ratcliffe. | ||