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).
Testing W.W. designs of silent helical second-speed gears on Peregrine, 20/25, and 40/50 chassis.
| Identifier | ExFiles\Box 2\4\ B002_X 127 128-page30 | |
| Date | 25th March 1933 | |
| X128 R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. Sg.{Arthur F. Sidgreaves - MD} c. Nor. c. E.{Mr Elliott - Chief Engineer} By.{R.W. Bailey - Chief Engineer} c. Ds. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}2/KT.25.3.33. HELICAL 2nd SPEEDS. We have now tested the W.W. designs of silent 2nd. gear on Peregrine, 20/25 and 40/50. On all three chassis there has been no tendency for the engaging dogs to work out of mesh on drive, overrun, or light running. The Peregrine box has completed 10,000 miles successfully. The Phantom and 20/25 boxes will shortly be running in France on 27-EX and 18.G.IV. respectively. The sliding piece in the 40/50 box is that shown in the lower half of N.Sch.3631. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||