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).
Required modification to a pump body and comparing pump speed ratios and rotor diameters with a Vauxhall unit.
| Identifier | ExFiles\Box 124\2\ scan0154 | |
| Date | 1st May 1940 guessed | |
| Cont'd.{John DeLooze - Company Secretary} A slight modification to the top hole shewn on scheme for mounting back plate will also require to be made to the pump body. We would point out that the speed ratio is NOT the same as the R.R pump i.e. 1.100 to 1, whereas Vauxhall's ratio is 1.270 to 1 We understand that our fan speed cannot be safely increased to give this latter ratio. The dia. of Vauxhall rotor is 3.100, compared with 3.750 dia. of R.R. rotor. Rm{William Robotham - Chief Engineer}/Hn.{F. C. Honeyman - Retail orders} | ||