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CH-53D OPERATING LIMITS
OPERATING LIMITS
52
Engineering
Professional
01/09/2007
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Term
T5 Starting Limit?
 Definition
649C
Term
T5 Max Continuous?
 Definition
671C
Term
T5 Max Military Power?
 Definition
707C 30 mins
Term
T5 Max Power 10 Minutes?
 Definition
727C
Term
T5 Postshutdown Limit?
 Definition
320C
Term
Ng Max Continuous?
 Definition
100%
Term
Ng Transient Overspeed/Time?
 Definition
100-102.5% / 30 sec
Term
Ng Max?
 Definition
102.5
Term
Nf Max Continuous
 Definition
110%
Term
Nf Max 5 sec?
 Definition
125-140%
Term
Nf Max?
 Definition
140%
Term
Ng Normal Operation
 Definition
58.5-100%
Term
Max Engine Oil Temp?
 Definition
125C
Term
Normal Engine Operating Temp?
 Definition
40-107C
Term
Nr Max?
 Definition
125%
Term
Rotor Brake Limits w/ One or Both Engines.
 Definition
60% Nr
Term
Rotor Brake Limits w/ No Engines
 Definition
65% Nr
Term
Rotor Brake Limits w/ Danger of Sudden Stoppage
 Definition
45% Nr
Term
Wind Limit for Engagement of Rotors
 Definition
45 kts in any direction.
Term
Max Military Torque
 Definition
118% @7560 HP
Term
Max Continuous Torque?
 Definition
100% @ 6400 HP
Term
Transient Overtorque?
 Definition
140% @ 8950 HP
Term
Max Hovering Turn?
 Definition
360 degrees in 15 sec.
Term
Max Sideward Flight
 Definition
35 kts.
Term
Max Rearward Flight
 Definition
30 kts.
Term
Max Operating Time w/o IBIS?
 Definition
2.5 hrs
Term
Min Auto Sink Rate?
 Definition
75 KIAS
Term
Max Auto Distance Speed?
 Definition
110 KIAS
Term
Max Bambi Bucket A/S empty and dump?
 Definition
90/50 KIAS
Term
DA 0-4000', Nr 100-104, AOB?
 Definition
30 deg.
Term
DA 0-4000', Nr 105, AOB?
 Definition
45 deg.
Term
DA above 4000', Nr 105, AOB?
 Definition
30 deg
Term
Max Gross Wgt?
 Definition
42K
Term
Max forward CG?
 Definition
328.0
Term
Max aft CG?
 Definition
352.0
Term
Max speed for aux tank jettison?
 Definition
130 KIAS
Term
Max speed in descent for aux tank jettison?
 Definition
120 KIAS
Term
Max rate of descent for aux tank jettison?
 Definition
1500 FPM.
Term
Max aux tank fuel imbalance?
 Definition
2900 lbs.
Term
Max AOB for aux tank jettison?
 Definition
0 deg AOB.
Term
APP Low Oil Pressure?
 Definition
6+/-1 psi.
Term
APP High Exhaust Temp?
 Definition
621C
Term
APP Overspeed?
 Definition
110%
Term
Approved Fuels for CH-53D?
 Definition
JP4,5,8
Term
Fuel Qty Left/Right Tank?
 Definition
2169 lbs / 319 gal
Term
Fuel Qty Aux Tanks?
 Definition
4420 lbs / 650 gal.
Term
Fuel Qty Total?
 Definition
13,178 lbs / 1938 gal.
Term
Engine Oil?
 Definition
MIL-L-23699.
Term
Transmission Oil?
 Definition
MIL-L-87354.
Term
Hydraulic Fluid?
 Definition
MIL-H-83282
Term
Tire Pressure?
 Definition
95-100 psi
Term
External Power?
 Definition
15/200 volts, 3-phase, 400 Hz AC.
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