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).
The silting up of radiators, proposing a switch to cast iron heads on the Phantom II.
| Identifier | ExFiles\Box 15\1\ Scan170 | |
| Date | 14th November 1929 | |
| X7250 To Wor.{Arthur Wormald - General Works Manager} from Hs.{Lord Ernest Hives - Chair} Hs{Lord Ernest Hives - Chair}3/AD14.11.29 RE : SILTING UP OF RADIATORS. (1) At the moment the only permanent cure we know of is to go to the cast iron head. Although one hates the additional weight, we do get other advantages besides the freedom from radiators silting up. The aluminium tubes which are inserted in the present aluminium heads are liable to corrode. We have just taken samples from a Phantom II car which has run 20,000 miles, they are in a poor condition. With the cast iron head we use copper tubes and there is no risk of this. (2) Tappet adjustment. Remains constant over a wide range of temperature, and reduces the tappet noise we now have when warming up. (3) Will, Ev.{Ivan Evernden - coachwork} points out, reduce torque reaction vibration which at present is No.1 on the list of Phantom faults. We have recently had an example of one of the two Phantom II cars silting up the radiator. This car had run 24,000 miles. Hs.{Lord Ernest Hives - Chair} | ||