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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 showing Delco Damper performance characteristics under various conditions.

Identifier  ExFiles\Box 28\1\  Scan212
Date  9th January 1931
  
SHEET IV
DIAGRAMS DELCO DAMPER. MAIN LEVER 7.5. INTERMEDIATE LEVER 13.50 S.1.31

LEFT COLUMN:

DELCO "LOW PRESSURE. 7.1.31
AS DELIVERED STANDARD
LOVEJOY OIL
450 R.P.M. 1" STROKE
AXLE VEL 1.25 FT/SEC
MEAN BALL PIN LOAD 52 LBS
MAX BALL PIN LOAD 70 LBS.
Graph labels: 154 LBS |", 1.53 D"

"DELCO" LOW PRESSURE G4-2G. 9.1.31
STANDARD
30 R.P.M. 2 1/2" STROKE
AXLE VEL .5FT/SEC
MEAN BALL PIN LOAD 36 LBS
MAX BALL PIN LOAD 42 LBS
Graph labels: 308 LBS |", 180"|.s, 1.06 D"

DELCO "LOW PRESSURE" G4-2G 9.1.31
STANDARD
70 R.P.M. 4" STROKE
AXLE VEL .75 FT/SEC
MEAN BALL PIN LOAD 32 LBS/D"
MAX BALL PIN LOAD 35 LBS/D"
Graph labels: 308 LBS|D", 120"|.s, 1.02 D"

DELCO "LOW PRESSURE" G4-2G 9.1.31
H.P. VALVE LEAK BLOCKED UP
70 R.P.M. 4" STROKE
AXLE VEL .75 FT/SEC
MEAN BALL PIN LOAD 32 LBS.
MAX BALL PIN LOAD 35 LBS.
Graph labels: 308 LBS|D", 120"|.s, 1.02 D"

RIGHT COLUMN:

"DELCO" HIGH PRESSURE 2G-G4 8.1.31
STANDARD
450 R.P.M. 1" STROKE
AXLE VEL 1.25 FT/SEC
MEAN BALL PIN 195 LBS
MAX BALL PIN 344 LBS
Graph labels: 308 LBS|D", 616 LBS|D", 2.81 D"

"DELCO" HIGH PRESSURE 2G-G4 9.1.31
STANDARD
130 R.P.M. 2 1/2" STROKE
AXLE VELOCITY .8FT/SEC
MEAN BALL PIN LOAD 275 LBS.
MAX BALL PIN LOAD 370 LBS.
Graph labels: 308 LBS|D", 616 LBS|D", 8.01 D"

DELCO" HIGH PRESSURE 2G-G4 9.1.31
STANDARD
70 R.P.M. 4" STROKE
AXLE VELOCITY .75 FT/S
MEAN BALL PIN LOAD 246 LBS.
MAX BALL PIN LOAD 350 LBS.
Graph labels: 308 LBS|D"

DELCO" HIGH PRESSURE 2G-G4 9.1.31
H.P. VALVE LEAK BLOCKED UP
70 R.P.M. 4" STROKE
AXLE VELOCITY .75 FT/SEC
MEAN BALL PIN LOAD 268 LBS.
MAX BALL PIN LOAD 336 LBS.
Graph labels: 308 LBS|D"
  
  


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