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).
Recommending the Buick-type PL.433 water pump for B.60 and B.80 engines based on its proven reliability.
| Identifier | ExFiles\Box 149a\3\ scan0301 | |
| Date | 23th November 1943 | |
| 1269 To Jnr.{Charles L. Jenner} from Wym.{G. Harold Whyman - Experimental Manager} c. to Rm.{William Robotham - Chief Engineer} c. to Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} Wym.{G. Harold Whyman - Experimental Manager} 18/CH. 23.11.43. Water Pumps. Engine for Carriers & Cars. In reply to Jnr.{Charles L. Jenner}4/JH. 23.11.43. concerning the best Water Pump that we know of at the moment for B.60 and B.80 Engines, it is definitely PL.433 which is the Buick type of Water Pump with new departure bearings. Three of these Pumps are fitted to Chassis 9.B.V., 3.B.50 and 30.G.VII and have run 25,700, 51,500 and 65,000 miles respectively, a total of 142,200 miles without giving any trouble whatever. This Pump therefore should definitely go on the Car and Carrier Engine L.O.P. Wym.{G. Harold Whyman - Experimental Manager} | ||