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).
Providing dimensional figures for Alfa gears following a telephone conversation.
| Identifier | ExFiles\Box 179\2\ img273 | |
| Date | 22th February 1932 | |
| ORIGINAL To Ds. From Ha/Gry.{Shadwell Grylls} Ha/Gry.{Shadwell Grylls}3/WJ.22.2.32. X W 82 ALFA GEARS. Replying to telephone conversation, we are sending you the following figures which we hope are what you want. The width along the axis at the root of the gears of the constant mesh and 3rd. gears is .600 and of 2nd. and 1st. gears is .625. The thickness of the tooth at the root is for the smallest (15 tooth gear) .207 and for the 27 tooth gear .230. The depth of the teeth on the small gear is .215 and on the large one .220. Ha/H.Grylls. | ||