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).
Graph of wind speed versus car speed measured at various positions in front of a Bentley radiator with the bonnet off.
| Identifier | ExFiles\Box 87\1\ scan0127 | |
| Date | 26th October 1934 | |
| FIG. 2 WIND SPEEDS IN FRONT OF BENTLEY RADIATOR - BONNET OFF AIR SPEEDS TAKEN AT POSITIONS SHOWN PITOT TUBE 5 1/2" IN FRONT OF MATRIX TAKEN ON B.23.A.E. SHUTTERS FULL OPEN. A NEGATIVE WIND SPEED WAS RECORDED AT POSITION ② WIND SPEED - M.P.H. CAR SPEED M.P.H. F.LL.S 26.X.34 | ||