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).
Comparison of the frontal areas of different car bodies and the estimated effect on performance.
| Identifier | ExFiles\Box 47\1\ Scan138 | |
| Date | 14th July 1932 | |
| -3- I measured the square feet of frontal area of this car, and also that of a Bentley with standard Saloon body which happened to be at Brooklands, and I also measured a very large Landaulet in our Showrooms. The dimensions and areas are as follows: Width of Front. Height of Front. Area in square ft. Mrs. Whitburn's coupe. 4.10½ 1ft. 11. 9.3 sq ft. Bentley Saloon. 3.9½ 1ft. 2¾ 4.65 " Landaulet in our Showrooms. 4.6. 1ft.10 8.3. " As the resistance of one square foot of frontal area is estimated to make a difference of one mile per hour at sixty miles per hour, and about one and a half miles per hour at seventy miles per hour, the effect of the large front of this car can be ready gauged. CWB. [Stamp Text] RECEIVED 14 JUL 1932 | ||