TH-57B/C limits, ranges & figures

Last updated: 6 April, 2003 22:21
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AIRFRAME
Dimensions: Main rotor 33'4", Tail rotor 5'5"

Weights
Max Gross Weight 3200lbs
Max Gross + Ext. Load 3350lbs
Max Cargo Hook 1500 lbs.
Tail Skid Upward 400 lbs.
Tail Skid downward 200 lbs.
Min Crew weight 180

Main Rotor
94 lbs.
13" chord length
2 degrees preconing
5 degrees blade twist

Tail Rotor
2554 rpm (2.35:1)
System Oil 3/8th pt

CG
AFCS Off 106.0 - 114.2
AFCS On 106.75 - 112.5

Required Equipment -IMC
Cyclic Force trim
Ministab FCS (pitch/ roll)
Main generator
Stby generator
Battery protection circuit {Bat relay}
Instantaneous VSI
Two att indicators (one powered by stby bat)
One operable comm system
One operable nav system
Radar altimeter
Other Equip - {OPNAV}
Airspeed Indicator
Tun needle + slip indicator {ball}
Magnetic compass
Heading indicator
Clock w/ min, sec, sweep hand
Icing control equip
Navigation lights

Required Equipment -Night
All instrument and C/B panel lights
All exterior lights
Operable comm radio
Attitude gyro
Radar altimeter

Maneuver Limits
Max Climb Rate 1000 fpm

Prohibited Maneuvers
No aerobatic maneuvers
AOB greater than 60
Protracted ops in Caution/ Avoid
-Height-Velocit area
Intentional entry
-blade stall/ power settling
Hovering turns > 45o/sec

FLIGHT CHARACTERISTICS
Airspeeds
Max Fwd 130 kts
Max Rear 15 kts
Max Side 25 kts
Max Turbulence 80 kts
Max Doors Off 110 kts
Max Auto 100 kts
Min Power/Rate of Descent50 kts
Max Range 72 kts
Min IFR 65 kts

Max Sideward/ Rearward Speed
DA
0-1000
1000-2000
2000-4000
4000-6000
6000-10000
SIDE
25 kt
20 kt
15 kt
10 kt
5 kt
REAR
15 kt
15 kt
15 kt
10 kt
5 kt
Max Forward Speed
AFCS
OFF
ON
<=3000#
130 kt
122 kt
>3000#
122 kt
122 kt
1K over 3KDA
-3.5 kt
-7 kt

Max Altitudes: AFCS Off
<= 3000 lbs.
>3000 lbs.
20,000 PA /18,000 DA
16,000 PA/13,000 DA
Max Altitudes: AFCS On
<= 3000 lbs.
> 3000 lbs.
11,500 PA/13,500 DA
8,5000 PA/11,000 DA

Accelerations
Min 0.5g - Max 2.5g

Winds Rotor Engagement
45 off nose (Fwd) Max 40 kt
45 off tail (Rear) Max 17 kt
Other (side) M ax 25 kt

ENGINE
6 stage axial, 1 stage centrifugal
6.5 times ambient press
Diffuser Scroll 500F
420 SHP / 317 SHP

Drive Train - Ng
51,989 RPM
Accelerate through 50-60%
Flight idle 62% +3%
Normal 60-105%
Max transient (15 sec) 106%
Eng Out 55 + 3%

Drive Train - Nf
33,956 RPM
Output shaft 6000 RPM
Normal 97-100%
Beep Control 96-101% + .5%
Max transient (chart)

Drive Train - Nr
Accelerate Through 50-60%
Normal 90-107%
Transient (5 sec) 107-114%
Low Rotor RPM 90 + 3%

Eng Oil System (5.5 qt. tank)
Engine Oil Temp
Min 0 C
Max 107 C
Engine Oil Pressure
Min 50 psi
Ng < 79% Min 50 psi
Ng 79-94% Min 90 psi
Ng >94% Min 115 psi
Max normal 130 psi
Max cold wx start 150 psi

TOT
Normal 100-738 C
Military ( 5 min) 738-810 C
Transient (6 sec) 810-843 C
Normal start - 810 C
Transient (10 sec) 810-927 C
Torque
Normal 0-85%
Military (5 min) 85-100%
Transient (5 sec) 100-110%

TRANSMISSION
394 RPM (15.22:1)
System Oil 5 qt.

Transmission Oil Pressure
Min 30 psi
Normal 30-50 psi
Max cold wx 70 psi
Transmission Oil Temperature
Min 15C
Max 110C
Trans Press 30 + 2 psi

FUEL
Closed circuit refueling 40 psi
Old Bravo 76 gal
New Bravo/ Charlie 91 gal
Boost pumps 4 - 30 psi
Fuel pump 700 + 50 psi
Fuel Pump 3.5 psi

HYDRAULICS
System 2.25 pt
Reservoir 1 pt
Pump 600 + 50 psi
Rotor Brake 38 - 30%
Rotor Brake 100 -120 psi
HYD PRESS 300 psi / 400 psi

ELECTRICAL
Battery 24V/ 17 amp-hr
Loadmeter Max 70%
Loadmeter Max for AC 50%
Starter/Gen 30V/ 150 A
Regulated 28V/ 105 A
Gen Wx Regulations
28.5 + .5V < 0C
27.5 + .5V 0C 33C
27.0 + .5V > 33C
External Power Unit 28V/ 400 A
Batt Temp 54 + 3C
Batt Hot 60 + 3C
Starter Limitations
ON
OFF
ON
OFF
ON
OFF
APU START
25 sec
30 sec
25 sec
30 sec
25 sec
30 min
BATT START
40 sec
60 sec
40 sec
60 sec
40 sec
30 min
Light-off in 20 sec= On for 60 sec

CHARLIE
Stby Batt 22.5V/ 1.8 Amp-hr
18 cells of 1.25 V
Stby Gen 28V/ 7.5 A


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