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).
Experiments to test and measure battery box vibrations on a Phantom II chassis.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan122 | |
| Date | 8th January 1931 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. to SS.{S. Smith} Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. to Ry. ORIGINAL x634 x7535. BATTERY BOX VIBRATIONS ON P.II. In order to verify that the battery on the 40/50 undergoes more movement when supported at the rear with a cantilever support than with the standard continuous cross-member, we have measured the movement of the free end of the cantilever by fixing to it a very rigid arm operating the central spindle of the steam indicator. The steam indicator is fixed to the cross-member just rear of the battery. The indicator multiplies all movement by 5. The front wheels of the chassis were bumped by the 2" cams. We had noticed that more movement of the battery took place while bumping the front wheels than when bumping the rear ones. For the second experiment the rear of the battery was supported by a continuous cross member as on a standard chassis. The movement of this the same distance from the frame as the end of the cantilever was recorded at various speeds up to the front axle critical speed of 30 m.p.h. As will be seen from the graphs the battery undergoes greater amplitude of vibration when supported by the cantilever than it does when supported by the continuous cross-member. We shall now carry out some static deflection tests to find out how much of the movement of the free end of the cantilever is due to bending of the cantilever and how much due to frame distortion, when applying a vertical load to the cantilever. Hs{Lord Ernest Hives - Chair}/H.{Arthur M. Hanbury - Head Complaints} Grylls. | ||