Table recording performance data from two test ascents with different bonnet setups.
| Identifier | ExFiles\Box 119\3\ scan0006 | |
| Date | 4th October 1912 guessed | |
| 4th asct. closed bonnet plate on. 4 1/2 litrs. 16c 15c 24c 27c 31c 47c 5th asct. Without bonnet plate on No water lost. " temp. 90° 14c 11c 24c 22c 34c 34c R | ||
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).