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).
Cooling tests comparing a Cadillac V-16 car to the Phantom III at Brooklands.
| Identifier | ExFiles\Box 145\1\ scan0165 | |
| Date | 24th June 1936 | |
| X1729 to E.{Mr Elliott - Chief Engineer} c. to WOR.{Arthur Wormald - General Works Manager} c. to Y. c. to MX.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Wtd.3/JH. 24.6.36. Report on Cooling Tests on Cadillac V-16 car at Brooklands - June 18th 1936. This car was taken to the track in order to judge its cooling in comparison with the Ph.III car. The tests were carried out in a similar manner to those in recent report, and the critical air temperatures etc. under high speed and low speed full throttle conditions are shown on attached sheet, compared with the corresponding Ph.III ones. Conclusions. (1) The Cadillac car is very much better cooled than the Ph.III (2) This superiority in cooling is obtained in two ways. (a) By a very effective fan. This is deduced since fitting the fan to the Cadillac raises its critical air temp. at 40 M.P.H. from 19°C to 40°C. and at 80 M.P.H. from 39°C to 49°C, whereas the Ph.III fan only raises the critical air temp. at 40 M.P.H. from 20 to 20.5°C. (see last report on Ph.III cooling). (b) By means of the cowling in front of the radiator, which improves the air flow through the core, particularly at high speeds. This is deduced since the Cadillac car (whose matrix is of same volume as, and of smaller frontal area than, the Cadillac matrix) is better cooled at high speeds than the Ph.III car, both without fans fitted. | ||