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).
Report summarizing radiator design test results, including comparisons with Chrysler, cavitation findings, and shutter weight.
| Identifier | ExFiles\Box 15\1\ Scan198 | |
| Date | 10th January 1930 | |
| Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/MJ10.1.30 contd. -5- at the rear of the top tank (See sketch). We attach a list of radiator weights. The Chrysler succeed in cooling their car with a very small matrix, but nevertheless our own weights seem rather great. E.{Mr Elliott - Chief Engineer} has suggested making our shutters in a thinner gauge stainless, at present they weight 18½ lbs on Phantom II. Summarising the results. (1) Reducing the water pump delivery does not seem as if it would help us. (2) We are free from cavitation on the large gap Phantom II radiator as it leaves the works. (3) Cavitation is not as serious as we previously thought. (4) In any alteration to radiator design top tank capacity would be advantageous if we could incorporate it without carrying more water in the radiator as a whole. We shall have the square tube radiator on the road in shortest time possible, but the manufacturers are delaying us with the tubes. It will be noted that, considering its small cross sectional area and relatively large depth, the Chrysler matrix has a low hydraulic restriction. HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||