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).
The pros and cons of different car window ventilation systems, including hinged, pivoted and glass louvres.
| Identifier | ExFiles\Box 117\4\ scan0100 | |
| Date | 31th July 1941 | |
| -cont'd- - 2 - Rm{William Robotham - Chief Engineer}/EAG.4/SW.31.7.41. Americans have done quite a lot of work on this, although personally, I have had no experience and I do not know of anyone in this country making the necessary equipment. I agree with you that hinged windows in the rear quarters are generally unsatisfactory, mainly through fumes and dust entering when the car is braked sharply. There is, of course, a tendency for this to happen when the front windows are pivoted, although I believe apart from this and water leakage, the pivoted front window is the most satisfactory form of ventilation, at least for the front passengers. Glass louvres are good from the point of view that it is possible to have the windows open a little when it is raining and get quite reasonable ventilation. The disadvantages are that they are noisy and to get them in satisfactorily, the tops of the doors have to be thickened up, which is a disadvantage. I will however, take up with Rm.{William Robotham - Chief Engineer} the points mentioned in your letter. Yours faithfully, FOR ROLLS-ROYCE, LTD., | ||