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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).
Spring specifications for the Phantom F2 series front axle damper control.

Identifier  ExFiles\Box 67\2\  scan0343
Date  7th December 1927
  
To BY/HEB.{H. Biraben} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X8420 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}4/LG7.12.27.

PHANTOM CHASSIS F2. SERIES.
FRONT AXLE DAMPER CONTROL : SECTION 7160. X8420 (crossed out) X7420

With reference to BY/HEB{H. Biraben}11/M1.12.27. Spring F.75168 will give the required load of 70 lbs. with the range of adjusting washers available.

Spring.76548 should have its free length reduced to 1.240" and should then give the required load with the range of adjusting washers available.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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