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).
Graph comparing the cooling performance of a large radiator at 20 M.P.H. under 'No Fan', 'Standard', 'Louvres', and 'Shutters' configurations.
| Identifier | ExFiles\Box 24\4\ Scan292 | |
| Date | 28th November 1924 guessed | |
| 23¾" MATRIX LARGE RADIATOR 20 M.P.H LOUVRES OR SHUTTERS NO FAN STANDARD .084 CORRECTED VALUES OF Q. .122 WATER CAPACITY .131 AND FRICTION HEAT ALLOWED FOR NO FAN COOLING INCREASED 30% LOUVRES OR SHUTTERS INCREASED 7% NO FAN STANDARD LOUVRES SHUTTERS DISTANCE MILES. TIME MINS X-AXIS (TOP - MILES): .5, 1, 1.5, 2, 2.5, 3, 3.5, 4 X-AXIS (BOTTOM - MINS): 1.5, 3, 4.5, 6, 7.5, 9, 10.5, 12 Y-AXIS: 21, 20, 19, 18, 17, 16, 15 LEFT MARGIN (VERTICAL): 107 | ||