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).
Chassis section development, detailing ongoing jobs on the test bed.
| Identifier | ExFiles\Box 159\5\ scan0143 | |
| Date | 3rd February 1941 | |
| 1373. To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}3/ET.3.2.41. CHASSIS SECTION DEVELOPMENT. ------------------------- 1. TEST BED. The following jobs are in hand:- a.{Mr Adams} "Running on" after switching off. We have had the necessary pieces made to enable our tests to be carried out, which are as follows:- 1. Water cool the valves. A Special water distributor has been produced for this test, which will prevent any water getting into the combustion chamber when the exhaust valves open. If we find that cooling the valves in this way cures our trouble, we shall try 2. Larger stem valves. 3. Larger stem sodium filled valves (these will be the latest type with sodium in the head as well as in the stem). b. Dual induction pipe. Just before the plant was damaged by frost, we had done some preliminary work on this pipe. This showed us straight away that we would require a special throttle control which would fully open the throttle in the small pipe before commencing to open the throttle in the large one. This is essential in order to make full use of the higher velocity in the smaller pipe. The necessary parts are being made. c. Low pressure oil supply - B.60. We understand that the valve gear is noisy immediately starting up from cold. This is alleged to be due to the delayed action of the oil in getting to the rockers. We shall try to re-produce this fault, and we have no other ideas at present than the fact that the initial settings were obtained on Motorine "C", while SAE.20 is used on the road. | ||