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).
Weight analysis listing the increase and excess weights of various components for S.V. and MX series vehicles.
| Identifier | ExFiles\Box 88\3\ scan0276 | |
| Date | 14th November 1938 | |
| -2- DB{Donald Bastow - Suspensions}/Cr.{Mr Cra???ster / Mr Chichester}1/KR.14.11.38. S.V. Increase. Lbs. Ozs. Frame. 115 0 app. Rear Axle 2 0 Lover Type Bonnet 17 0 Side Spare Wheel Carrier 8 0 MX{John H Maddocks - Chief Proving Officer} series Excess over S.V. Brakes 23 0 2 galls. Extra Petrol in Tank 18 0 Front Bumper 10 0 Exhaust System 4 4 Battery Box 8 12 Rear End Suspension and Propellor Shaft 19 0 Floorboards supplied with Car 7 1 Dash Board 14 0 Wheels and Tyres 72 0 Undershields 9 0 app. A point of interest on the two chassis is that much of the weight saved on the S.V. brake operating mechanism is lost on the increased weight of the brake drums. If a semi-floating axle is fitted to S.V., necessitating pressed wheels all round, the decrease in weight would be 3 lbs. | ||