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 performance data recording various temperatures at increasing altitude and distance.
| Identifier | ExFiles\Box 101\1\ scan0267 | |
| Date | 10th May 1936 guessed | |
| 22-G-V.{VIENNA} Time Distance Altitude Water Oil Under Bonnet Air. 1025 Ft. 80°C. 72°C 52°C 18°C. 2½ mins. 1 mile 1,150 ft. 75°C. 72°C. 48°C. 18°C. 5 2 1,400 78 70 49 17 6 3 1,700 77 70 47 16 8½ 4 2,000 78 70 47 15 10 5 ø 2,450 80 70 44 14 13½ 6 ø 3,000 85 70 45 13 16½ 7 ø 3,500 85 70 48 12 19 8 ø 4,100 84 70 45 10 22 9 ø/4,650 85 70 42 10 25 10 5,000 78 70 43 10 27 11 ø 5,350 75 69 40 10 29 12 ø 5,650 75 68 40 10 32 13 6,050 77 67 40 8 34½ 14 ø 6,350 76 68 42 8 ø Third gear. | ||