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).
Hill climbing performance test results comparing Petrol and Pynol fuels on Pistem Hill.
| Identifier | WestWitteringFiles\J\May1923\ Scan64 | |
| Date | 15th May 1923 guessed | |
| (3) HILL CLIMBING. Climb of Pistem Hill. | | PETROL. | PYNOL. | |---|---|---| | Speed at start | 5 | 5 m.p.h. | | Speed on 2nd. corner (min.) | 21 | 20 " | | Speed at finish. | 31 | 28 " | | Max. speed attained. | 32 | 31 " | | Time for climb. | 1 min. 18.2 sec. | 1 min. 20.1 sec. | Notes on performance using Pynol :- Less detonation than with petrol. This fuel would probably take much more ignition advance than petrol. Slow running is equal to petrol. General running results seem to indicate that to obtain an increase of power larger carburetter jets would be required. All the above tests were carried out on normal carburetter setting. Hs{Lord Ernest Hives - Chair}/ACL. | ||