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).
Development and testing of engine components for the Phantom III.
| Identifier | ExFiles\Box 161a\4\ scan0140 | |
| Date | 30th March 1936 guessed | |
| (4) modification if successful will save considerable weight and cost and facilitate assembly of the connecting rod unit in position in the engine. The Design department have in hand a scheme for a flexible flywheel for Phantom III, the scheme for which is about 50% done. We should like to have a report on the dynamic balancing device tested on the front end of the Phantom III crankshaft. Connecting Rods. *light alloy bush. Experimental Department are now testing a connecting rod assembly to LeC.5123, incorporating a light alloy bush. This is being run in conjunction with a crankshaft having .125" smaller crankpins. Promising results have been obtained. Pistons. A development is required for testing the effect of various types of piston rings, and combinations of rings on Phantom III. Crankcase Ventilation and Oil Cooling. It has been suggested that the elaborate crankcase ventilation systems now used on American cars generally are directed towards oil and main bearing cooling under flat out conditions in addition to the professed desire to reduce condensation by removing the blowby gasses. As a preliminary investigation it is proposed to run an American car with and without the ventilation system working, and some means for registering oil temperature. It is also proposed to try air cooling fins on the sump and means of flowing the oil flung from the connecting rod on to the outer walls of the crankcase with internal ribs if necessary to assist oil cooling under flat out conditions. Carburetters and Induction Pipes. A scheme is required from the Design department for a cold air intake. A certain amount of work has been done on an R.R. type of twin flow downdraught | ||