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).
Data table showing results of radiator tests on a Hispano car, with and without the bonnet.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan14 | |
| Date | 22th September 1924 | |
| RADIATOR TESTS ON HISPANO CAR. Table Headers: Top Row: Air passing through radiator. | Air passing through core. | B.T.U's min. accounted for by Radiator. Bottom Row: Condition of test. | Eng. r.p.m. | lbs.min. | Top temp. | Bottom temp. | Temp. behind Fan. | Temp. in front of Radiator. | Temp. of room. Table Data: Condition: WITH BONNET. Row 1: 500 | 47.6 | 89.75 | 83.5 | 67.75 | 18.5 | 15.5 | 535 Row 2: 1000 | 82.3 | 91.25 | 85.25 | 59 | 18.1 | 16.1 | 890 Row 3: 1490 | 127.5 | 91.5 | 86.75 | 56.25 | 19 | 17 | 1090 Row 4: 2025 | 159 | 89.75 | 85.5 | 55 | 18.5 | 17 | 1216 Condition: BONNET REMOVED. Row 5: 500 | 46.6 | 90.5 | 81.25 | 41 | 20 | 15 | 776 Row 6: 1000 | 86.2 | 89.0 | 82.1 | 39.25 | 18 | 16 | 1070 Row 7: 1500 | 127.6 | 90.25 | 84 | 38.5 | 18.75 | 17 | 1435 Row 8: 2000 | 164.5 | 91 | 85.25 | 38.5 | 20 | 18.5 | 1705 | ||