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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 mechanical efficiency of a Bentley 25 HP servo motor and its linings.

Identifier  ExFiles\Box 141\3\  scan0313
Date  26th October 1934
  
EXPERIMENTAL DEPARTMENT REPORT
4719
RR 2X (20H) (60708 6-3-34). G.C.B.
REFERENCE :- Hs{Lord Ernest Hives - Chair}/PJH. 7/KW.26.10.34.
Subject of Report :- Mechanical Efficiency of Bentley and 25 HP. Servo Motor and efficiency of Servo Linings.
General Conclusions :- Ball bearing bridge and spring ring torsional connection greatly increase mechanical efficiency, and that more satisfactory servo linings are required.
Copies of Report Circulated to :- E.{Mr Elliott - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} De. Ey. Hdy.{William Hardy}
Report to be noted for further action by :- Exptl. Dept. and De.
Test carried out on :- No. 5 Test Bed, Servo Test Rig and Bentley chassis B-23-AE.
By :- F.J. Hardy K.{Mr Kilner} Scholes.
Test No.
Date :- 26.10.34.
  
  


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