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).
Temperature test results for a 1948 h & E type vehicle under various conditions.
| Identifier | ExFiles\Box 75\4\ scan0064 | |
| Date | 17th August 1911 | |
| R.R. 148 (20 H) (W 730, 17.8.11) G X819 Temperature tests taken on 1948 h & E type scuttle & side doors, 25 m.p.h full throttle & fair wind behind, taken on same roads reading at start & when boiling. Table: Headers: Atmos Temp, Water Temp, Floorboards Top, Floorboards Under, Time, Conditions Row 1: 19, 75, 26, 42, 0, Lowered bonnet, each side guard out, 3 louvres out of other side, no dash screen. Row 2: 20, 88 1/2, 23, 48, 10 mins Row 3: 18°, 75, 24, 40, 0, Standard bonnet, each side guard out & 3 louvres out of other side, no dash screen. Row 4: 18 1/2, 92, 21 1/2, 44, 10 Row 5: 19, 75, 25, 39, 0, Both side guards in 3 louvres out of each, standard bonnet no dash screen. Row 6: 20, boiled, 22, 45, 10 Row 7: 20, 75, 26, 39, 0, Both side guards complete standard bonnet no dash screen. Row 8: 20 1/2, boiled, 24, 45 1/2, 10 | ||