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).
Recommendations for improvements to the fan belt, autovac, and cooling system, with test proposals for the Phantom II.
| Identifier | ExFiles\Box 24\5\ Scan264 | |
| Date | 9th July 1930 | |
| -7- Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/U9.7.30 contd. Our recommendations for improvement are - (1) Improved fan belt. Standardisation sheet circulated. We are so dependent on this that we think the drive might receive design consideration. (2) Improved autovac with larger drop valve. Standardisation sheet issued. (3) Four bonnet shutters fitted as standard. Standardisation sheet issued. We consider that the radiator outlet might with advantage be improved. It would be valuable as the freedom of the matrix became reduced in service. It is apparent that the carburation suffers from the high temperatures under the bonnet. It is certain that the fuel in the autovac reaches 50°C. with quite reasonable atmospheric temperatures. After a burst of speed the slow running is most erratic. We recommend that as further design work is being carried out on the fuel system, an endeavour should be made to carry the minimum quantity of fuel under the bonnet and at the same time to provide a greater margin between delivery and consumption than at present. Next to the autovac, we consider the needle valve in the float chamber is the limiting factor in the supply. Having explored the high speed cooling of the Phantom II we propose to do some tests to reproduce hill climbing at 30 M.P.H. the method used being similar to that adopted on Phantom I. We shall also test the square tube radiator and try a test moving the radiator further forward to give the air a chance to get away past the shock absorbers and crankcase. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||