Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Testing front brakes with a floating fulcrum.

Identifier  ExFiles\Box 73\2\  scan0118
Date  29th November 1923
  
R.R. 493A (40 H) (EL 42 12-7-23). J.H. D.{John DeLooze - Company Secretary}

9940
Expl. No. 1559
REF:Hs{Lord Ernest Hives - Chair}4/LG29.11.23.

EXPERIMENTAL REPORT.

To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}
c. to CJ.
c. to Rg.{Mr Rowledge}
c. to Da.{Bernard Day - Chassis Design}
c. to E.{Mr Elliott - Chief Engineer}
c. to BY.{R.W. Bailey - Chief Engineer}

FRONT BRAKES WITH FLOATING FULCRUM.

As instructed in your telegram, we have tested these brakes with the toggle altered from .875" to .5". Also we have increased the lever which operates the toggle to 6".

With this arrangement the brakes are effective. It needs considerable pressure in order to lock the front wheels but with reasonable braking pressure the brakes, we estimate, are 50% effective. We find, however, with these leverages and the brakes adjusted so that they come on in the standard position of the foot pedal movement, that there is very little clearance between the brake liners and the drum, it is approx. .010". The brake also feels springy, and one would anticipate that the pedal would not be long before it was on the floor.

The braking is quite smooth - there is no sign of jaggers.

MADDOCKS & CROXLEY

Hs.{Lord Ernest Hives - Chair}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙