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).
Second test of a petrol gauge, detailing fuel level changes over distance.
| Identifier | ExFiles\Box 44\3\ Scan092 | |
| Date | 3rd December 1928 guessed | |
| contd :- -2- A second test was carried out to substantiate the above inference. The petrol tank at the commencement of the test had 10 1/4 galls. in, the petrol level being just above the top of the second cup; with this level we expected to obtain a much quicker rate of rise of liquid in the gauge. During the first 5 miles, 1 3/4 galls. was registered, during the second five miles it rose to 3 1/4 galls., reaching 7 1/2 galls. after only 25 miles. It will be remembered that in the first test it was not until after 35 miles had been covered that a reading above 1 1/3 galls. was obtained. After 25 miles the increase became less fast, the petrol level in the tank having dropped well below the second cup and the road surface being good. ------------ | ||