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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).
The wear and efficiency of jointed brake shoes.

Identifier  ExFiles\Box 30\6\  Scan184
Date  15th February 1924
  
R.R. 493A (40 H) (BL 42 12-7-23). J.H.,D.{John DeLooze - Company Secretary}

EXPERIMENTAL REPORT.

Expl. No.

REF:Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG15.2.24.

See X9940 for sketch

As the w inequality of wear on the non-wrapping shoe was very much worse than this, we substituted a standard shoe on that side for road tests. The efficiency of the wrap-ping jointed shoe used alone is very high; when a non-wrapping shoe is introduced however, much of the increased efficiency is lost. We are completing comparative tests between std., floating fulcrum and jointed brakes, both on the road and on the test rig. We cannot see, at the moment, / many possibilities for a jointed non-wrapping shoe.

Hs{Lord Ernest Hives - Chair}/Rp.
  
  


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