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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).
Diagrams and specifications for front and rear road springs for 20 HP and 40/50 HP models under 'Other Continental Conditions'.

Identifier  ExFiles\Box 178\1\  img201
Date  28th August 1926 guessed
  
OTHER CONTINENTAL CONDITIONS

SECTION 1: 20 HP FRONT ROAD SPRING - F.53583
DIAGRAM TEXT: 1.950 +.300 -.300 CLEARANCE (FULL LOAD) BUFFER TO SPRING CLIPS.
DIMENSIONS: 18.000, 20.000
SPECIFICATIONS:
UNLOADED CAMBER: 2.500
LOADED CAMBER: .500 (POS)
WIDTH OF SPRING PLATES: 1.750
RATING (600 LBS. SPRING): 320 LBS. PER 1"

SECTION 2: 20 HP REAR ROAD SPRING - F.53169
DIAGRAM TEXT: 4.225 +.375 -.375 CLEARANCE BUFFER TO AXLE BKT. (FULL LOAD)
DIMENSIONS: 28.000, 28.000
SPECIFICATIONS:
UNLOADED CAMBER: = 5.125
LOADED CAMBER: = .575 (POS.)
WIDTH OF SPRING PLATES: = 2.250

SECTION 3: 40/50 HP FRONT ROAD SPRING - F.71975
DIAGRAM TEXT: 1.750 +.250 -.250 CLEARANCE BUFFER TO SPRING CLIPS. (FULL LOAD)
DIMENSIONS: 21.000, 22.500
SPECIFICATIONS:
UNLOADED CAMBER: 2.600
LOADED CAMBER: -.500 (NEG)
WIDTH OF SPRING PLATES: 2.000
RATING (1100 LBS. SPRING): 355 LBS. PER 1"

SECTION 4: 40/50 HP REAR ROAD SPRING - F.10612
DIAGRAM TEXT: 4.531 +.500 -.500 BUFFER TO AXLE CLEARANCE (FULL LOAD), 9.300
DIMENSIONS: 26.500, 26.500
SPECIFICATIONS:
UNLOADED CAMBER: 2.500
LOADED CAMBER: -1.310 (NEG.)
WIDTH OF SPRING PLATES: 2.500
RATING (2000 LBS. SPRING): 125 LBS. PER 1"
  
  


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