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).
Series of five graphs showing the results of cooling tests on a 20 HP engine under various conditions.
| Identifier | ExFiles\Box 77\4\ scan0329 | |
| Date | 21th July 1923 | |
| Title: COOLING TEST ON 20 H.P. Graph A: Y-axis: TEMP AT TOP & BOTTOM OF RADIATOR X-axis: TIME IN MINS Legend: COMPARISON OF, SHUTTERS ON, SHUTTERS OFF, LOUVRES CLOSED, UNDERSHIELD ON Graph B: Y-axis: TEMP C° X-axis: TIME MINS. Legend: COMPARISON OF, LOUVRES OPEN, LOUVRES CLOSED, SHUTTERS ON & OPEN Graph C: Y-axis: TEMP C° X-axis: TIME MINS. Legend: COMPARISON OF, UNDERSHIELD OFF LOUVRES OPEN, UNDERSHIELD OFF LOUVRES CLOSED, BONNET OFF, OPEN SHUTTERS Annotation: LOUVRES OPEN Graph D: Y-axis: TEMP C° X-axis: TIME MINS. Legend: COMPARISON OF, FAN OFF LOUVRES CLOSED, FAN OFF LOUVRES OPEN, OPEN SHUTTERS Graph E: Y-axis: TEMP C° X-axis: TIME MINS. Legend: COMPARISON OF, FAN OFF, FAN ON, OPEN SHUTTERS Stamp: LIMITED, TEST ROOM, 21 JUL. 23, TY. | ||