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).
Diagnosing a running issue with Chassis No. 90-EU, suspecting the petrol type.
| Identifier | ExFiles\Box 47\1\ Scan289 | |
| Date | 5th June 1926 | |
| H.{Arthur M. Hanbury - Head Complaints} Frithl/GM/5-6-26. Re: Chassis No. 90-EU. Driver A.{Mr Adams} Stafford. Sir Richard Garton, Tythe Hill, Haslemere, Surrey. At the request of Cr.{Mr Cra???ster / Mr Chichester} I went to see above car the owner of which complains of bad slow running when the engine was hot. I examined ignitions, valves and carburetor and found them O.K. except that the H.T. wares had been reversed the coil wires being placed on to magneto plugs. These I connected to their proper plugs, after which the engine was started. Everything went well until the car had been on the road and taken up a few hills to get the engine thoroughly warmed up. The bad slow running then began to show itself; the engine ran like nothing on earth. This rather puzzled me at first, as both ignitions and the valves seemed O.K. The symptoms suggested that the engine was being starved of petrol. I then asked the driver what petrol he was using. He said the very best you can buy (Carless special) so I examined, and spilt some on the floor when it practically evaporated immediately. I then tried some Shell Aviation which I had in my bicycle; this took about twice as long to evaporate. This led me to believe that our hot spot gets too hot for the petrol he was using. I therefore asked him to give No. 1 Shell a trial and I think this will overcome the trouble. I should like to have been able to try this experiment myself, but as he had his tank full and not any other petrol available, he said that as soon as the tank got low he would fill up with No. 1. Shell and let us know the results. I was somewhat handicapped in this job by having to hurry off to Derby. Frith. | ||