Rolls-Royce Archives
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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).
Charts illustrating the maximum movement of a flexible shackle spring eye under various driving and road conditions.

Identifier  ExFiles\Box 17\4\  Scan018
Date  31th August 1931 guessed
  
FLEXIBLE SHACKLE (HS{Lord Ernest Hives - Chair} 213) MAXIMUM MOVEMENT OF SPRING EYE

TOP CHART:
COLUMN HEADERS:
HARD BRAKING
TURNING ON FULL LOCK AS FAST AS POSSIBLE
L.H. LOCK
R.H. LOCK
VERY BAD ROAD HITTING BUFFERS (20MPH)
MAXIMUM RECORDED DURING AVERAGE RUN (INCLUDES NORMAL BRAKING)

BAR VALUES (MOVEMENT IN INCHES):
Hard Braking: B .156", F .064"
L.H. Lock: B .193", F .013"
R.H. Lock: B .073", F .003"
Very Bad Road: B .180", F .144"
Average Run: B .085", F .048"

LEGEND:
F:- FORWARD MOVEMENT OF SPRING EYE.
B:- BACKWARD

BOTTOM CHART:
LEFT Y-AXIS: MOVEMENT OF SPRING EYE (INS) [.150, .100, .050]
RIGHT Y-AXIS: SPRING LOAD AT SPRING EYE (LBS) [792, 528, 264]
X-AXIS: ROAD SPEED (M.P.H) [20, 30, 40, 50, 60, 70, 80]

LEGEND:
GOOD MAIN ROAD : ------ (solid line)
JOGGLING ROAD : ------ (dashed line)
LINES: B (Backward Movement), F (Forward Movement)
  
  


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