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).
Instructions regarding fitting unbalanced radiator shutters to the 25/30 chassis, similar to the Phantom III and Bentley models.
| Identifier | ExFiles\Box 105\1\ scan0232 | |
| Date | 9th January 1936 | |
| X546 BY.{R.W. Bailey - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} Da.{Bernard Day - Chassis Design} JNR.{Charles L. Jenner} E.2/HP.9.1.36. Radiator Shutters - 25-30 HP. 25/30 chassis should have unbalanced radiator shutters similar to Phantom III and Bentley. We are issuing instructions for this accordingly. Will E/JNR{Charles L. Jenner} please say what alterations are necessary. E.{Mr Elliott - Chief Engineer} | ||