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).
Car specifications and transmission design considerations for various models.
| Identifier | ExFiles\Box 161a\1\ scan0057 | |
| Date | 24th November 1939 | |
| -2- Ev.{Ivan Evernden - coachwork}11/MH.{M. Huckerby}24.11.39. (6) Schemes to Detail. Rm.{William Robotham - Chief Engineer} will go through a list of pre-war and post-war schemes not yet detailed and rule out those that are considered obsolete or redundant. (7) Specifications. Derby are producing a specification of Ripplet to a revised basis price. Specifications for Rippletto are to be produced by us for the car with (a) R.R. gearbox and axle. (b) Proprietary gearbox and axle based on the revised Ripplet specification. (8) Transmission Design. Resulting from our investigations into a Single prop. shaft for B.V., Ripple and Ripplet we come to the following conclusions. (a) If the forward joint of the rear prop. shaft is taken forward to any degree beyond the position now occupied on B.V. the rear floor ceases to be flat. Increased hypoid and reduced bump would gain one a little. The very shortest 3rd. motion shafts for these cars and Rippletto would be 35.000". (b) Any less extension to the gearbox than that quoted in (a) would entail a tunnel in the rear floor which could not be masked by the Cadillac 60 treatment. If one has a visible tunnel, to some extent there is no harm in increasing its height within reason, in fact up to a point there is advantage. Therefore if a long extension or a split prop. shaft are ruled out we should get an extension of Wraith III. proportions, which places the forward universal of the prop. shaft in a position such that the tunnel does not raise the front seats. Ev.{Ivan Evernden - coachwork} | ||