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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).
Departmental memo about crankshaft vibrations and the performance of an engine with a heavy front flywheel.

Identifier  ExFiles\Box 25\3\  Scan009
Date  13th December 1910
  
R.R. 348A (100 H) (M 42. 10.2.10). E.P. 6019.

DEPARTMENTAL MEMO.

Issued 13th December 1910

This column is for Name of Person addressed.
C.J.
X634

DATE.
13/12/10

Crankshaft Vibrations.

R6/D131210. Referring to the crank-shaft vibrations, we have a car running here with a heavy front flywheel which is very difficult to apply to the present engines, but which shows that the spring drive is not necessary provided this front friction driven flywheel is of sufficient weight.

The engine seems to run quite smoothly throughout the whole range, the gears being quiet, but as we have powerful charges and a fair compression on this particular engine, the impulses are noticeable, but the acceleration is grand.

[Signature]

[Stamp: J 15 XII 10]

This sheet must be filed with the correspondence to which it refers.
  
  


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