Rolls-Royce Archives
         « Prev  Box Series  Next »        

Results of brake system tests.


Identifier  ExFiles\Box 12\5\  05-page263
Date  5th March 1931
  
L4/Hs {Lord Ernest Hives - Chair}
BRAKE TESTS.
5.3.31.

22-EX.

C.I. Drums (cooling ribs) Front & Rear.
Ferobestos Linings .375 thick. Front.
Ferodo Bonded Linings. Rear.
Servo Cotton A. {Mr Adams} Linings.

(1) Cold measurement front toggle levers ¾" on both. Foot Pedal from dash 5" light hand pressure.

(2) After 6 medium brakings from 40.MPH. to 10.MPH. Foot Pedal 5" from dash. Front toggles Both ¾"

(3) Brake Hand from 70.MPH. to 10.MPH. 6 applications. pulling up distance 200 ft. 196 ft. 213 ft. 200 ft. 269 ft. 207 ft.

(4) Measurements immediately after test 3. Foot Pedal from dash 5". Front toggles both 13/16"

(5) Measurements after hand braking 40.MPH. to 10.MPH. every ½ mile for 20 miles.

Foot pedal 5¼" from dash. Front toggles both ¾"
Measurements taken cold at Works.
Foot Pedal 4¾". Front toggles 13/16" each.

(6) Only on one occasion did we obtain a groan from the rear brakes with light pressure.

(7) Repeat test No. 5.
Foot Brake pedal 4¾". Front toggles 13/16" each.

(8) No change in pulling up distance took place after heating up servo. 70.MPH. to 10.MPH. 200 ft.

A.B.Roberts.
R. {Sir Henry Royce} Pattinson.
  
  
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).


Copyright Sustain 2026, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙