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).
Battery box modifications and battery fitment for the Wraith III model.
| Identifier | ExFiles\Box 164\3\ img119 | |
| Date | 26th January 1938 | |
| 6021. To EX. from Ev.{Ivan Evernden - coachwork} Copy Pc. Rm{William Robotham - Chief Engineer}/. De/JP. DX/RD. Da{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork}5/G.26.1.38. Childs. See me Rm{William Robotham - Chief Engineer} WRAITH III - BATTERY BOX. The aim originally on Wraith III was to get a low Limousine car. The battery depth was the chief limitation, and Mr. Minchin was asked to come to Derby and help us out. He produced a 52 A.H. battery, 6.LG.11.S. of the required depth and length. For technical reasons of separators and capacity we were told to fit a battery some two inches longer - 6.LZLD-13-S, and had no alternative if the ground clearance were to remain 5.100. Since then conditions have changed and in particular the rear of the car has been raised .900 by fitting the P.III rear axle. We now believe we can use a 25/30 HP. battery by lowering the battery box by about 1.000. The ground clearance is then 4.700 under the box as against 4.000 on the 25/30 HP. To deal with the remaining bodies for the first six production cars, all of which are close coupled and so retrieve the 2" of floorspace in the rear, it is possible to put into the existing box a 25/30 battery without the lowering of the box. All this is shewn on F.CD.448. We believe the 25/30 battery when applied to Wraith III needs to have its terminals handed. It is suggested that we order immediately three batteries for the cars in question and instruct the slight modification to the fixings in the box. Da{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||