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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).
Cause of engine vibration on the 40/50 chassis and a proposed solution.

Identifier  ExFiles\Box 25\3\  Scan069
Date  14th March 1922
  
X634

Hs.{Lord Ernest Hives - Chair} from EP.{G. Eric Platford - Chief Quality Engineer}
a.{Mr Adams} to BY.{R.W. Bailey - Chief Engineer}
c. to E.{Mr Elliott - Chief Engineer}

EP{G. Eric Platford - Chief Quality Engineer}13/H14.3.22.

Re. ENGINE VIBRATION. 40/50 CHASSIS.
->----------------

With reference to my discussion with you on the
above, I still think the general complaint of engine vibration
is due entirely to the pronounced harsh running when the car
is on top gear about 20 - 25 miles per hour. It does not
appear that the engine itself is bad at this stage, but that
it synchronises with some other natural period of the chassis.

We have only been able successfully to overcome this
complaint in the past by giving special attention to the
various chassis and body fittings, so that as far as possible
the vibrations of these parts at this critical speed are
eliminated, or as far as possible "damped".

We feel that the suspension of the engine in the
frame might be considered to advantage. BY.{R.W. Bailey - Chief Engineer} has suggested that
as an improvement, the front feet of the engine can be fixed
to the frame and the rear feet fixed in position, similarly
as the front of the engine is now supported. Could this be
tried?

EP.{G. Eric Platford - Chief Quality Engineer}

[Signature]

[Stamp: TEST DEPT 14 MAR. 22]
[Stamp: RECEIVED]
  
  


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