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).
Number of shutter ventilators on a car bonnet and the naming convention.
| Identifier | ExFiles\Box 12\7\ 07-page112 | |
| Date | 18th July 1930 | |
| To Sg.{Arthur F. Sidgreaves - MD} From Hs.{Lord Ernest Hives - Chair} Hs.{Lord Ernest Hives - Chair}1/MJ.18.7.30. 24-EX. Replying to Sg{Arthur F. Sidgreaves - MD}9/D16.7.30. This car is fitted with four shutter ventilators - two at the front, and two at the rear. The present standard is two rear shutters only. A Standardisation sheet has already been sent round recommending that we fit four shutters on the bonnet. As all of our bonnets have shutters it may be called a plain bonnet to distinguish it from a louvred bonnet. HS.{Lord Ernest Hives - Chair} | ||