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).
Tests on airflow with different front air intake grilles.
| Identifier | ExFiles\Box 26\1\ Scan127 | |
| Date | 17th June 1959 | |
| To : GB. c : VS{J. Vickers}/HPJ. c : FRM. c : AFM{Anthony F. Martindale}/W. c : JPB. c : AFM{Anthony F. Martindale}/VL.{V. Lewis / Mr Valentine} AFM{Anthony F. Martindale}/RS.{Sir Henry Royce's Secretary} 2/SW. 17.6.59. 1104. Air Intake Grille A test was done recently on 25.B to determine the increase in airflow obtainable by altering or removing the front air intake grille. A test done with and without the S.2 grille in place showed an increase of approx. 30% in the amount of air entering the car. A similar test done with and without an S.1 grille showed an increase of approx. 15%. Thus the air intake grille is a serious blockage to the air flow of the fresh air system and it would be obviously desirable to increase the size of the opening. As this would, at this stage, be impracticable, due to modifications affecting P.S.C., we might consider using a grille offering less obstruction to the flow. An S.1 grille would immediately give nearly 15% increase though this is an expensive item. A grille in anodised aluminium might be easy and cheap to produce. AFM{Anthony F. Martindale}/RS.{Sir Henry Royce's Secretary} | ||