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).
Table of test results from Brooklands, comparing water temperatures for different radiator and louvre configurations at various speeds.
| Identifier | ExFiles\Box 105\1\ scan0090 | |
| Date | 18th October 1930 guessed | |
| TYPE OF RADIATOR | 30 M.P.H. Full Throttle. | 45 M.P.H. Full Throttle. | 60 M.P.H. All Closed. | All Out. All Closed. -- | S/T Top Water & Ats. | Mean Water & Ats. | S/T Top Water & Ats. | Mean Water & Ats. | S/T Top Water & Ats. | Mean Water & Ats. | S/T Top Water & Ats. | Mean Water & Ats. 6 mm. Sq. Tube Vertical Louvres. | 69.75 | 64. | 66. | 60.5 | | | | 6/7½ mm. Vertical Louvres. | 78. | 72.5 | 73. | 68. | | | | 6/7½ mm. Horizontal Louvres. | | | 78.5 | 73.5 | | | | Vertical Louvres 6/7½ mm. Dented. | 74.0 | 68.0 | 69. | 63.5 | 59. | 55. | 67.75 | 62.75 Vertical Louvres 6/7½ mm. Standard. | 77. | 71. | 70.75 | 65.75 | 63. | 59. | 74. | 69. RESULTS OF BROOKLANDS TESTS WEEK FROM 13th. TO 18th. OCTOBER. Vertical text on left: X. 766. X. 7250. X. 5250. | ||