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).
Comparison of radiator matrix types, detailing the atmospheric temperature at which boiling occurs at 30 and 45 M.P.H.
| Identifier | ExFiles\Box 105\1\ scan0138 | |
| Date | 21th April 1931 | |
| Figures given Ats. Temp. at which the car will eventually boil if driven for sufficiently long under conditions specified. [Table Start] COLUMN 1 HEADER: TYPE OF RADIATOR MATRIX. COLUMN 2 HEADER: 30 M.P.H. COLUMN 3 HEADER: 45 M.P.H. ROW 1 COLUMN 1: Small Hexagon Ended American Tube. Hexagon .305 across Flats Centre .255 Round No. of Dents 18. COLUMN 2: 36.5 COLUMN 3: 37.5 ROW 2 COLUMN 1: Large Hexagon Ended American Tube. No. of Dents. 20. Hexagon .360 across Flats. Centre .309 dia. round. COLUMN 2: 33.5 COLUMN 3: 34. ROW 3 COLUMN 1: 6.m.m. Parallel Square Tube E.81385. figures from previous tests. COLUMN 2: 30.25 COLUMN 3: 34. ROW 4 COLUMN 1: Square Tube E.81389. 6.m.m. Square Centre. Ends expanded to 7 1/2 m.m horizontally only, i.e. vertical waterways only. COLUMN 2: COLUMN 3: ROW 5 COLUMN 1: Present Standard. 6/7 1/2 m.m. round E.79448 4 dents/Tube. COLUMN 2: X. 21.5 COLUMN 3: X 24.5 [Table End] X. these figures are lower than some we have previously attained. Tests on 19-EX. Conditions as in Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT. 21.4.31 All tests taken with bonnet having vertical louvres. These tests are very susceptible to the direction of the wind and are therefore not always exactly comparable from day to day. | ||