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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).
Chassis flexibility, cantilever suspension, and resulting battery failure due to vibration on the Continental Touring Saloon.

Identifier  ExFiles\Box 19\1\  Scan065
Date  14th November 1930
  
@ 14/30
DA.{Bernard Day - Chassis Design}
c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
x7120
BY3/G.14.11.30.

CONTINENTAL TOURING SALOON CHASSIS.

Referring to DA{Bernard Day - Chassis Design}1/M12.11.30. the flexibility in the cantilever system is obviously in the frame, which is under quite a fair torsional load and form of the resistant member i.e. the frame is not calculated to withstand torsional effects without considerable deflection.

The Experimental Department intended to carry out experiments, and I believe these are in hand.

It would certainly appear that the cause of the battery failure internally was excessive vibration. My own diagnosis of it was to this end and later it was definitely confirmed by the Battery Makers without them knowing the facts of the suspension or anything to do with it beyond the examination of the internal parts of the battery.

Obviously, we cannot permit a change of this description to come in, in view of the facts, until it is conclusively proved that the cantilever suspension does not reproduce the conditions in this connection. However, it is well to remember that there may be a period connected with some road speed which may make the vibration critical.

BY.{R.W. Bailey - Chief Engineer}
  
  


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