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).
Water 'building up' in cylinder jackets due to steam formation and proposed modifications.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan106 | |
| Date | 18th December 1930 guessed | |
| - 4 - BUILDING UP. The "building up" is caused through steam formation in the cylinder jackets. The extent of the "building up" under normal running conditions (i.e. engine tilted at 15°, starting up, warming up, then running at normal R.P.M. and maintaining a normal outlet water temperature of 88°C for 10 mins.) is 1.25 gallons above the normal or cold filling level (see curve 201 F.7). If the water temperature was allowed to rise to 90°C, water does build up to the extent of 2.125 gallons above the cold filling level in the header tank. (Comparing it with the 'Fury' tank at 90°C the water builds up 2.2 gallons above cold filling level.) CONCLUSION. It would appear that to improve the water flow over and around the cylinder heads to remove or reduce the steam pockets would be the modification suggesting itself, and a step in this direction would be to introduce 'R' engine system of water inlet at the top of the cylinder jackets instead of the present arrangement of filling the jackets at the base. As an experiment the core plug holes at the front of the cylinder jackets could be utilised as the water inlet, or use the front outlet ports (of the top water rails) as the water inlets and only use the rear outlets for the outlet. This could be done quickly (on the engine on the Meccano Hangar) and would prove if a modification in this respect was justified. Hs{Lord Ernest Hives - Chair}/TAG. | ||