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).
The inspection and road test of chassis 60.PK due to overheating issues in mountainous terrain in France.
| Identifier | ExFiles\Box 24\4\ Scan247 | |
| Date | 3rd September 1924 | |
| C O P Y. Hs.{Lord Ernest Hives - Chair} from GWH.{George W. Hancock - Head Chateauroux} 3rd. Sept. 1924. RE. VISIT TO GRASSE - FRANCE. CHASSIS 60.PK - MR. SCHLEY. This car is a large Landaulet holding 5 to 6 persons in the rear. The country which the car has to traverse is all mountainous, rising to some 800 metres. 3rd. and 2nd. gears are needed according to load. There is no easing up anywhere. The air temperature during my visit was 25°C, average. I examined the car and found that the magneto was on the late side - firing .125 B.T.D.C. full advanced. This was altered to .750. The Fan had been altered at Nice - a new high speed Fan fitted. This had not accomplished anything, a matter of approx. 2°C, nothing more. .The carburetter setting was O.K. .Coil timing O.K. .Pump O.K. .Engine was very clean and looked after well. Petrol gravity 730 approx. I went up a mountain road with the driver - water temp. being 40°C at the start. We went up on 3rd. gear and at the top the water was just boiling. Ignition was full advanced, throttle full open most of the time. The driver had been used to taking this road with .750 advance of ignition, and mixture control 3 notches weak. I asked him contd :- | ||