Rolls-Royce Archives
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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).
Engine performance issues including stalling, noisy tappets, weak acceleration, and crankshaft vibrations.

Identifier  ExFiles\Box 23\2\  Scan007
Date  16th April 1912
  
H R H 254 (100w.) X543. 16.4.12. G 252R

the R.R. otherwise the engine is very
easily stopped. The engine does not run
as slowly as the R.R. and engine running
car standing is not so quiet. The worst
noise seems to be the tappets. + valves
Carburation is Very Fair
car can be accelerated from running slow
without any misfiring or " popping back "
but feels rather weak and if the
accelerator is only half opened the engine
accelerates more quickly. After running
the engine hard on retard and then
accelerating again the engine seems to
have no power as though the carburation
was much too weak, and is a considerable
time before engine again begins to pull.
The engine has crankshaft
periods at about 30 miles per hour ( slight)
and 45 miles per hour ( bad ) The valves
leave their seats quite early, ie 50 miles
Contd.
  
  


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