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).
Vehicle testing, detailing issues with the cooling system, carburetion, and steering.
| Identifier | ExFiles\Box 11\3\ 03-page186 | |
| Date | 9th July 1930 | |
| -3- cooling system O.K. when I know it is not. The tests taken and reported on the 9/7/30 prove that with an air temperature of 27°C. the cooling efficiency of the system is O.K. with the maximum heat units developed in the engine. It also proves the vast difference that 4°C. increase in air temperature makes. The top water temperature has consistently followed the air temperature. The air temperature during the run back from Paris was 23° to 26°C., and our maximum top water temperature was 80°C. We have reported how the water is lost from the radiator. If our exhaust system will only stand up for a day or two, we can carry out further tests. Our time has been taken up with the exhaust system. The valve trouble we had was not the cause of overheating. There was only one occasion that I detected the valve off the seat during a day's run, and I gave definite instructions that this feature should be carefully checked. Why cannot we have the improved water pump bend sent out? We will carry out tests to prove that if a customer runs with a slack fan belt, what increase in water temperature he will obtain. There is no cut-out fitted to this car. I have tried retarding the ignition, but speed and acceleration is lost. The carburation is very definitely affected by heat, and the commercial spirit we are using is useless without a water temperature of 75°C. is maintained, or the equivalent heat is obtained under the bonnet. There is not sufficient heat to the carburetter supplied by the exhaust. Re steering stickiness. We have definitely proved that the heaviness and sticking of the steering is due to failure of lubrication of the cross steering ball spheres. We tried Amber | ||