Hand-drawn diagram illustrating the physics of a gyroscope, with equations for precession and acceleration couples.
| Identifier | ExFiles\Box 29\1\ Scan294 | |
| Date | 24th February 1926 guessed | |
| X457 Polar moment I Diametral moment I' Spin ω Precession Ω and Ω̇ (accn) Precession couple T = IωΩ Accn couple Q = I'Ω̇ | ||
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).