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).
Comments and recommendations on the Bensport wiring diagram for model DB245.
| Identifier | ExFiles\Box 168\1\ img123 | |
| Date | 19th May 1933 | |
| .86117. By/RD. From Hs{Lord Ernest Hives - Chair}/Wst. c. to E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.6/MA.19.5.33. Re. BENSPORT WIRING DIAGRAM. DB{Donald Bastow - Suspensions}245. We have examined this diagram as requested and the following are our comments on the same:- (1) Dynamo-battery circuit. We should like No.2 fuse which is shown placed between the switchbox and the cutout to be moved between the cutout and the regulator at the point marked A-A.{Mr Adams} In the event of the regulator sticking causing an excessive dynamo charge to be generated, the blowing of the fuse would then isolate the shunt coil of the cutout from the dynamo terminals. If the fuse is placed as shewn on the diagram a failure as described above would delegate the protection of the cutout shunt coil to the dynamo field fuse which though adequately protecting the dynamo field against excessive field current might easily allow the shunt coil of the cut-out to be burnt out. It would be necessary to alter the warning lamp connection accordingly. (2) Petrol Gauge. We strongly recommend that the petrol gauge be wired through a fuse. The only possible way we can see of doing this is to connect the gauge through No.6 fuse to the instrument board light supply. The petrol gauge would then indicate by pressing the switchbox button This isolates the petrol gauge from the ignition circuit which we consider is fundamentally sound. | ||