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).
Secret internal memo discussing the centre of twisting of the axle for four-wheel brakes with a torsional friction damper.
| Identifier | WestWitteringFiles\L\April1924-June1924\ Scan27 | |
| Date | 18th June 1924 | |
| ORIGINAL TO HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} SECRET. DA{Bernard Day - Chassis Design}3/M18.6.24. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. TEST WITH TORSIONAL FRICTION DAMPER. FOUR WHEEL BRAKES. X9550 X9940 Referring to HS{Lord Ernest Hives - Chair}/LG11/6/24, and the attempt to find the centre of twisting of the axle, if the centre is in the position indicated for forward deflection of the spring, it would appear that the top plate requires to be stretched, which does not seem possible. We suggest that the centre of twisting is in a different position, according to whether the axle is being twisted forwards or backwards, that is to say, that the arcs that you find are not really arcs, but slight curves. It appears to us as though the centre of twisting for the forward direction would have to be either on the top plate or slightly above it. DA.{Bernard Day - Chassis Design} | ||