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).
Modifications to the J.3. Gearbox for the Vulture engine, specifically concerning cones and clutches.
| Identifier | ExFiles\Box 123\3\ scan0158 | |
| Date | 17th March 1934 | |
| GRY{Shadwell Grylls} X4704 To BY.{R.W. Bailey - Chief Engineer} From HDY.{William Hardy} HDY.{William Hardy}1/HP.17.3.34. c. Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} Ba. RHC.{R. H. Coverley - Production Engineer} J.3. Gearbox in Vulture. With reference to Hdy.{William Hardy}2/HP.6.3.34, we should like the 8° cones with threaded surface for top, 3rd and 2nd speed gears to be available for trial as soon as possible. The second speed clutch should be in other respects as on N. Sch.3997 except for the modification described in HDY.{William Hardy}1/HP.2.3.34. The original cam angle of 45° should be used with these cones. HDY.{William Hardy} | ||