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).
Blueprints for a Wraith III water pump, detailing alterations for testing a smaller diameter rotor.
| Identifier | ExFiles\Box 149a\1\ scan0286 | |
| Date | 13th September 1938 | |
| 1269 HDS (struck through) c. Rm.{William Robotham - Chief Engineer} c.c. Rm{William Robotham - Chief Engineer}/Std. (struck through) BY/Ald.{F. Allwood - Experimental Design}8/G.13.9.38. WRAITH 111. WATER PUMP. SECTION 5160. Please receive herewith two blueprints of each of the following drawings :- S.CD.865 Water Pump with smaller rotor. Ex.S.1048 Packing Disc. 1 off. Ex.S.1049 Rotor. 1 off. These drawings show alterations to be made to existing pieces Ex.S.724/5 issued with memo BY/Ald.{F. Allwood - Experimental Design}7/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 10.5.38. for the purpose of testing a smaller diameter rotor in accordance with memo Rm{William Robotham - Chief Engineer}/Std.8/MH.{M. Huckerby}29.8.38. Kindly instruct one set. Ald{F. Allwood - Experimental Design} BY/Ald.{F. Allwood - Experimental Design} | ||