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).
Constant speed petrol consumption tests, detailing issues encountered and comparing results with a Lagonda.
| Identifier | ExFiles\Box 170\1\ img079 | |
| Date | 30th May 1940 guessed | |
| 2/ During our constant speed petrol consumption tests with the Stromburg carb, we were considerably handicapped on our Six Hills test road by the number of Army lorry convoys travelling southwards, thus limiting our use of the south directional road to tests at 40 MPH and over, because of the longer distances covered at the lower speeds. Consequently the 20 and 30 MPH tests were done on the north directional road only, and we very much doubt their accuracy, but the results obtained at 40 MPH and over were the averages of runs in both directions, and can be taken as accurate. We had not time to spend another day on these tests because we had to change over to SU carbs in time to run comparative tests with a Lagonda 12 cyl car, which had been loaned to us for a short time. The figures obtained on the 3 SU carbs are accurate. | ||