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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).
Tests and improvements on the Brake Cam Actuating Shaft and Peregrine Brakes.

Identifier  ExFiles\Box 1\10\  B001_X106 TO X 110-page033
Date  13th April 1933 guessed
  
-2-

(3) Brake Cam Actuating Shaft (20/25).

.430 cam
2.25
B

For 2000 lbs. at cam load at B. = 385 lbs.
Deflection measured at B. = .075 which
becomes .39 at brake pedal.

Due to twisting of the actuating shaft
deflection at B. = .013, which equals
at brake pedal .068

(4) Improved Peregrine Brakes. R.R.Sch.292.

With the new stiffened actuating shafts on
Peregrine and 20/25 type adjustment of the rear brakes,
the sponginess should be identical with that of the 20/25.

The clearance of the G.W.H. shoe has been
reduced to .007 - .008

To give .015 clearance at the shoe centre, the
recommended clearances are :-

Front .312 at end of 3.5 lever.

Rear .650 at end of 5.750 lever.

Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}
  
  


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