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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 graphs for a Delco II Rear Damper with adjustable leak and 12' lever.

Identifier  ExFiles\Box 28\1\  Scan196
Date  16th May 1939 guessed
  
SHT3
DELCO REAR DAMPER. ADJUSTABLE LEAK. 12" LEVER.

Graph 1:
DELCO II LOW PRESSURE
1" STROKE. N°1 LEAK.
MAX. PRESSURES.
550 R.P.M. --- 115 LB/sq in
450 R.P.M. --- 115 "
300 R.P.M. --- 92.5 "
200 R.P.M. --- 77 "
Y-Axis: 154 LB/sq in

Graph 2:
DELCO II HIGH PRESSURE
1" STROKE N°1 LEAK.
MAX. PRESSRS.
536 R.P.M. --- 970 LB/sq in
450 " --- 785 "
300 " --- 693 "
200 " --- 508 "
Y-Axis: 462 LB/sq in

Graph 3:
DELCO II LOW PRESSURE
1" STROKE. N°3 LEAK.
MAX. PRESSURES.
550 R.P.M. --- 115 LBS/sq in
450 R.P.M. --- 100 "
300 R.P.M. --- 85 "
200 R.P.M. --- 61.5 "
Y-Axis: 154 LB/sq in

Graph 4:
DELCO II HIGH PRESSURE
1 STROKE N°3 LEAK.
MAX PRESSURES
550 R.P.M. --- 855 LB/sq in
520 R.P.M. --- 809 "
450 R.P.M. --- 740 "
300 R.P.M. --- 485 "
200 R.P.M. --- 392 "
Y-Axis: 462 LB/sq in

Graph 5:
DELCO II. LOW PRESSURE
1" STROKE N°4 LEAK.
MAX. PRESSURES
600 R.P.M. --- 123 LB/sq in
450 R.P.M. --- 100 "
300 R.P.M. --- 85 "
200 R.P.M. --- 69 "
Y-Axis: 154 LB/sq in

Graph 6:
DELCO II HIGH PRESSURE.
1" STROKE. N°4 LEAK.
MAX. PRESS.
550 R.P.M. --- 715 LB/sq in
450 R.P.M. --- 646 "
300 R.P.M. --- 554 "
200 R.P.M. --- 370 "
Y-Axis: 462 LB/sq in
  
  


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