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).
Comparing the radiator cooling performance of the 'SS' car against previous Phantom models.
| Identifier | ExFiles\Box 15\1\ Scan108 | |
| Date | 27th May 1929 | |
| X7250 To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to DA.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. to PN.{Mr Northey} OY. c. to BY.{R.W. Bailey - Chief Engineer} Hm.{Capt. W. Hallam - Head Repairs} Hs{Lord Ernest Hives - Chair}/Rml/LG27.5.29. X766 X8250. COOLING ON 'SS{S. Smith}' CARS. In view of the fact that the cooling of the SS.{S. Smith} has been criticised, we attach a comparison of the radiator on this car and of that on previous Phantoms. It will be seen that on the SS.{S. Smith} we have a larger frontal area of the radiator than we have previously had on any RR. car. The volume is the same as that on F2B. series Phantom, the last Phantom to do a 10,000 miles test. Some weeks ago we carried out a continuous full throttle test at 30 m.p.h. comparing the S.S. and Phantom cars. We could detect little difference between the two. In view of PN{Mr Northey}2/W24.5.29., we carried out a comparative test on the Cat & Fiddle hill comparing (1) an early type Phantom (2) a later type Phantom (3) a SS.{S. Smith} car. In this test we loaded each car up to the equivalent of 7 passengers. In each case the hill was climbed under normal driving conditions from 25 to 30 m.p.h. on top gear. On none of the cars was there any bonnet ventilation. It will be seen from the curves which we attach that the SS.{S. Smith} definitely shews up better than either of the other two cars. This should be expected from: (1) The fact that the SS.{S. Smith} is lighter than any Phantom with a similar body. (2) The increased frontal area of the radiator is a predominating factor at low speeds. Our tests shew that the SS.{S. Smith} is better cooled contd:- | ||