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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).
Performance data graphs and tables for front axle dampers with 7.5 levers.

Identifier  ExFiles\Box 28\1\  Scan211
Date  9th January 1931 guessed
  
FRONT AXLE DAMPERS. 7.5 LEVERS
SHEET 3

COMPRESSION OR LOW PRESSURE STROKE

TABLE 1:
MEAN AXLE VEL. FT/SEC | MEAN BALL PIN LOAD LBS | MAX BALL PIN LOAD LBS
.75 | 27.7 | 29.5
1.07 | 32.6 | 32.6
1.50 | 40 | 45.6
2.15 | 44.5 | 58.6
3.35 | 73.0 | 106

GRAPH 1 Y-AXIS: 308 LBS/□"
GRAPH 1 X-AXIS: BALL END STROKE 4"

REBOUND OR HIGH PRESSURE STROKE

TABLE 2:
AXLE VEL. FT/SEC | MAX. BALL PIN LOAD LBS. | MEAN BALL PIN LOAD | CURVE LETTER
1.25 | 344 | 195 | A
.860 | 200 | 120 | B
.278 | 60 | 31.4 | C

GRAPH 2 Y-AXIS (from top): 770 LBS/□", 616 LBS/□", 462 LBS/□", 308 LBS/□", 154 LBS/□"
GRAPH 2 X-AXIS: BALL END STROKE 1"

TABLE 3:
AXLE VEL. .28 FT/SEC.
CURVE | MAX. BALL PIN LOAD LBS. | MEAN BALL PIN LOAD LBS.
D.{John DeLooze - Company Secretary} UNDRILLED VALVES | 134 | 38.0
E.{Mr Elliott - Chief Engineer} DRILLED VALVE | 60 | 31.4

GRAPH 3 Y-AXIS: 154 LBS/□"
GRAPH 3 X-AXIS: BALL END STROKE 1"
  
  


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