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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).
Brake test results and component specifications for chassis 19-EX.

Identifier  ExFiles\Box 12\5\  05-page308
Date  19th October 1931
  
RM{William Robotham - Chief Engineer}
x7360.
19.10.31.
BRAKE TESTS. 19-EX.
Cold measurements -
F.P. from dash hand pressure 5 3/4"
R.{Sir Henry Royce} arms O.S. 3/4" N.S. 3/4"
Front toggles O.S. 5/8" N.S. 5/8"
12 brakes 70 - 10
1st brake 250 ft.
12th brake 260 ft.
Measurements after checking last distance
F.P. 6"
Front toggles O.S. 5/8" N.S. 5/8"
10 miles braking every 1/4 mile 40 - 10.
12 brakes 70 - 10.
10 miles braking every 1/4 mile 40 - 10.
--------
O.S. front dust cover rubs.
Tendency for brakes to grab at 50 m.p.h.
No noise from either front or back.
75 miles.
Cold measurements -
F.P. from dash 5 1/2"
R.{Sir Henry Royce} arm O.S. 5/8" N.S. 7/8"
Front toggles O.S. 5/8" N.S. 3/4"
--------
Front Brakes.
O.S. Lake & Elliott Cast Iron Brake Drum Linings G.79542.
N.S. RR. Cast Iron Brake Drum Linings G.79542.
Auxiliary Brake Shoes G.79445.
Ferodo Bonded Asbestos 3/8" thick.
Rear Brakes.
G.79502 Rear Brake Drums produced in Lake & Elliott's
Nickel Chrome Cast Iron, fitted with Anti-Squeak Type
Brakes to Sch.1433.
Ferodo Bonded Asbestos 3/8" thick.
HS{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}
  
  


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