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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 combination of the RRM and DES.60 brake operation schemes into a single design for testing purposes.

Identifier  ExFiles\Box 73\2\  scan0297
Date  25th March 1924
  
X.9940

To RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} )
E.{Mr Elliott - Chief Engineer} HS.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce}

S E C R E T.

R2/M25.3.24.

E.A.C.

BRAKE OPERATION.
COMBINED RRM. & DES.60. X.9940.

Since writing yesterday I have thought that at present we now only want one design to test in two forms, because RRM. scheme and M.{Mr Moon / Mr Moore} DES.60. can be combined and tested two ways - i.e. RRM. and all going to floating lever as instructed so that the gearbox will be exactly alike: the servo speeds being geared from 7 to 10 to 1 in all cases where we use 80 to 90° angle of action will be the same.

The servo itself is quite the same but with two floating levers and no stop, but it will require the crank pin or segment. (80° might be made 90°).

The pressure levers and screw will be the same, and for the same pressure much longer than DA.{Bernard Day - Chassis Design} shews - probably about 3" to 4". (30° to 45° as lately instructed).

The cross bar floating lever and back and front connections exactly the same for each, but some new dimensions. (See sketch previous drawing this lever too small, with sheet of dimensions and suggested better construction).

More by next post.

SEE ORIGINAL FOR SKETCH.

R.{Sir Henry Royce}
  
  


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