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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).
Letter from Borg & Beck Company Ltd regarding corrected calculations for clutch assemblies.

Identifier  ExFiles\Box 130\3\  scan0041
Date  28th December 1938
  
Telegrams
BORGANBECK,
LEAMINGTON SPA.
Telephone
LEAMINGTON SPA 1550-1.
BORG & BECK COMPANY LTD
MANUFACTURERS OF CLUTCHES.
Registered Office
BROCK HOUSE,
LANGHAM STREET,
LONDON, W. 1.
WORKS:
Tachbrook Road.
LEAMINGTON SPA,
Warwickshire.
Directors
E.{Mr Elliott - Chief Engineer} B. BOUGHTON.
W. EMMOTT.
D.{John DeLooze - Company Secretary} T. BROCK.
Your Ref: Rm{William Robotham - Chief Engineer}/NRC{N. R. Chandler}/10/JH.
Experimental Dept.
Our Ref: TS/AMS/LP.{Mr Lappin}
28th December 1938.
Messrs. Rolls-Royce Ltd.,
DERBY.
For the attention of Mr. N. R.{Sir Henry Royce} Chandler.
Dear Sirs,
Re Long C.F. Clutches.
We have to acknowledge receipt of your esteemed letter of the 23rd instant and remarks have been carefully noted with regard to pressures require to disengage both the 10" and 11" Long C.F. Clutches at bearing.
Our Designs Department have re-checked calculations and we must apologise for the fact that Recommendation Sheets submitted to you for these assemblies to specification BB.460 and BB.471, have incorrect pressures inserted. Correct figures should be, 10" 250/270-lbs, 11" 235/250-lbs, approximating calculations shown your letter.
We indeed thank you for drawing this matter to our attention.
Yours faithfully,
BORG & BECK COMPANY LIMITED.
A.M. Shinkins,
Sales Department.
[Handwritten notes]
Top right: fil 1110
Bottom left:
10" Long Orange
BB 460 dated 17-3-38
11 BB 471 dated 9-5-38
-" Long L. Blue
Specification Corrected
WRP 2/1/39
Bottom right:
10" Long Orange 125-135 = 1170
11" L. Blue 110-120 = 1035
  
  


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