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).
On experiments with front engine mounting on the B.50 Chassis to improve performance at slow speeds.
| Identifier | ExFiles\Box 133\4\ scan0337 | |
| Date | 1st April 1940 | |
| 1127 To Ev.{Ivan Evernden - coachwork} o.{Mr Oldham} to Jnr.{Charles L. Jenner} We have been experimenting with the front engine mounting on the B.50 Chassis with a view to improving same particularly at slow speeds. The present standard front mounting with inclined rubbers, transmits all engine movements to the driver when the engine is idling, and causes the front of the car, radiator, lamps and wings to shake sideways when the car is accelerated from low speeds. We have been able to effect a considerable improvement by fitting two rubbers of 45° durometer hardness horizontally on the front pan at 17⅝" centres. The size of the rubbers used is 3" x 2½" and 1½" in depth, as against the standard rubbers of 3½" x 2" and only 1" in depth. We appreciate the difficulty that may be experienced by Design in scheming the exact size of rubbers used by us in our experiments but if the size is to be altered, we would like the depth of the rubber to remain the same i.e., 1½". We enclose a photograph of our scheme as fitted to 11.B.V. and we intend sending the actual pieces to Park Leyn for design inspection. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||