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).
Design, requirements, and interchangeability of bonnets for the B.50 and B.3 models.
| Identifier | ExFiles\Box 112\3\ scan0047 | |
| Date | 2nd June 1938 | |
| J.H. B50 Bonnet SECRET BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Std. c. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} 805 DA.{Bernard Day - Chassis Design}18/G.2.6.38. hie Rm{William Robotham - Chief Engineer} STTD/SDD BONNETS - B.50 and B.3. We attach hereto PD.181, PD.182 and PD.183 giving full information for detailing the bonnet of the Rover type for B.50. These schemes are very similar to and replace PD.155, PD.145 and PD.147 respectively, and which were drawn for the original B.50 radiator having a pronounced facial slope. Details are in hand for the top plates etc. by BY/Ald.{F. Allwood - Experimental Design} The remaining outstanding item is the bonnet rest angle or valance strip which is in hand. This bonnet is required for 1-B-50 and all subsequent B.50 cars. It is proposed to use this bonnet on all B.3 cars in future, altered only in height to suit the B.3 radiator. All parts will be interchangeable between the two chassis with the exception of the bonnet side plates. We suggest that these can be set out when detailing. Such a bonnet will be needed for 3-B-5 and subsequent B.3 cars, but not for 2-B-5 which has to have a bonnet of shape and construction following the design for 1-B-5 as the body has already been made on that assumption. DA.{Bernard Day - Chassis Design} | ||