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).
Water pump specifications for the Phantom, Spectre, and 25-HP engines.
| Identifier | ExFiles\Box 149a\1\ scan0053 | |
| Date | 28th September 1934 | |
| COPY. To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}1/HP.28.9.34. Water Pumps. | Engine. | Rotor Dia. | Pump Speed at 3500 Engine rpm | Tip Speed ft per sec. | |-----------|------------|-------------------------------|-----------------------| | Phantom. | 3" | 5250 | 68.7 | | SpectreCodename for Phantom III. | 4" | 3500 | 61 | | 25-HP. | 3" | 5250 | 68.7 | E/JNR.{Charles L. Jenner} | ||