Test report page detailing the results of short circuit, open circuit, and RPM tests, along with measurements and sparking speed data.
| Identifier | ExFiles\Box 48\2\ Scan157 | |
| Date | 21th August 1924 guessed | |
| Contd. -4- (10) Short circuit test :- OK (11) Open circuit test :- Safety gap too large. (12) Test at 1500 R.P.M. :- OK (13) (a) 10.7 m.m. (b) 2.7 m.m. (c) 2.3 m.m. (d) 1.1 m.m. With 3.5 annular gap and 3 micromho chemical leak Advance . Retard Maximum regular sparking speed - 960 , 2150rpm Minimum " " " - 800 , 1250- (14). | ||
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).