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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).
Specifications table for Phantom side steering tube ends, detailing part numbers, stress ratings, movement, and chassis fitment.

Identifier  ExFiles\Box 68\1\  scan0236
Date  14th May 1928
  
PHANTOM SIDE STEERING TUBE ENDS.
14th. May 1928.

ARRGT. OR LOP. NO. | PIECE NO: OF SPRING. | RATING AND MAXIMUM STRESS. | TOTAL BALL END MOVEMENT. | CHASSIS TO WHICH FITTED. | REPLACED BY.{R.W. Bailey - Chief Engineer}
F.72514 | F.4614 | 3550 lbs/inch. | .175 each way at each end. | V.{VIENNA} series to and of B2. | F.76788.
F.76245 | F.76110 | 1400 lbs/inch. 84.100 lbs. | .200 each way at each end. | C2. series. |
F.76406 | F.76110 | 1400 lbs/inch. 84.100 lbs. | .200 each way at each end. | D2. series. |
N.sch.2258 F.76787 | F.76726 | 1500 lbs/inch 84.555 lbs. | .300 each way at each end. | E2, F2A, F2B, G2A. |
F.78117 | F.77944 | 1959 lbs/inch. 85,000 lbs. | .300 each way at each end. | EAC.14 (exp) (but suitable for E2. to G2A. |
F.76788 | F.76726. | 1500 lbs/inch. 84.555 lbs. | .300 each way at each end. | Conversions from V.{VIENNA} to B2. series. |

BY/HEB.{H. Biraben}

Handwritten notes:
Large X next to the row for N.sch.2258.
Vertical text on the right side (all crossed out):
F7430 X
F7250 X
F7420 X
  
  


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