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).
Summary of cooling system specifications and standardisation for a Bentley car, including shutter openings and core types.
| Identifier | ExFiles\Box 87\1\ scan0227 | |
| Date | 5th May 1937 | |
| -2- (3) Minimum shutter opening permissible with either 58 MM. or 52 MM. Mk.Vl.{V. Lewis / Mr Valentine} core is 54° - between the plane of the shutter and the matrix face. (4) The comparisons of the fans are given in Rm{William Robotham - Chief Engineer}/Std.3/AP.4.5.37. Summary The cooling of the present standard Bentley car is adequate but when we adopt the proposed fixed shutter arrangement, it will be necessary to use the Mk.Vl.{V. Lewis / Mr Valentine} type of core and we are in favour of the 58 MM. deep matrix as giving greater strength, area of waterway etc. and necessitating no alteration to existing parts. In any case we shall standardise the 58 MM. Mk.Vl.{V. Lewis / Mr Valentine} lightened construction core for Bentley as soon as 3.B.lV. car (which is fitted with this type of core) completes its 15000 miles test in France. Besides the gain in heat dissipation, the weight saving will be approximately 8 lbs. We have now ordered a second set of dummy shutters which reproduce the shape of the std. shutters with an angular opening of 54° between shutter plane and matrix face. If this is acceptable to Sales, we shall standardise this arrangement as soon as 3.B.lV. completes its 15000 miles test. Rm{William Robotham - Chief Engineer}/Std. | ||