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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).
Page discussing issues with drive shaft impulses and pedal pressure on the braking system.

Identifier  Morton\M20.3\  img029
Date  19th June 1924
  
R.R. 493A (20H) (D.A. 652 20-3-24) J.E.D.

-2-

Expl. No.

REF HS{Lord Ernest Hives - Chair}/LG/19.6.24.

EXPERIMENTAL REPORT.

from the worm it should alter the impulses of the drive shaft.
It has only become a chronic complaint with the 7 to 1 reduction.
This, we consider, is the worst point to overcome in
the adopted scheme of brakes.
As regards the pedal pressure required to operate the
brakes. 35-PK which was sent to WW. was on the light side -
some other cars have required definitely more pressure. We
consider 35-PK is as light a pedal pressure as desirable. We
are hoping the average will require more pressure.
We have arranged with the Works not to get too g-
far ahead on the levers fitted with the cams so that we can
increase the pressure required if experience decides this is
desirable.

HS.{Lord Ernest Hives - Chair}
  
  


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