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).
Results from testing Delage springs and correcting the pitch angle of a worm helix.
| Identifier | WestWitteringFiles\J\January1923\ Scan99 | |
| Date | 26th January 1923 | |
| R.R. 285A (100 T) (S.H. 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 ORIGINAL TO HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} DA{Bernard Day - Chassis Design}2/M26.1.23. X3525 X2628 We meant to have asked you yesterday whether you had had any results from weakening the Delage springs, and testing for the effect on shocks. We have looked into the particulars of the worm and sector, and we cannot find that it differs very much from the 40/50, though it is true that there is a little more friction in the worm. We might point out that we think the pitch angle of the helix given on your label of particulars of the worm is incorrect, and should be 13°, not 17°. DA.{Bernard Day - Chassis Design} [Stamp: RECEIVED HS{Lord Ernest Hives - Chair} JAN 29 1923] | ||