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).
Schedule N.Sch.3633 for a helical second speed gear for the 20/25 J.II and J.III models.
| Identifier | ExFiles\Box 104\4\ scan0176 | |
| Date | 9th January 1933 | |
| To: [redacted] from HDY.{William Hardy} c.c. [redacted] Hs.{Lord Ernest Hives - Chair} [redacted] 85310. HDY{William Hardy}16/N.9.1.33. Helical 2nd.Speed - 20/25. J.II and J.III. ------------------------------------------ Herewith N.Sch.3633 which shows a helical 2nd. speed on the lines of that recently sent for the Peregrine. HDY.{William Hardy} | ||