(2)
The mode selector units for all three systems are located on the pilots' overhead panel.
(3)
The three navigation units are located on a shelf (E2-6) in the main equipment center.
(4)
The three battery units are located on a separate shelf (E12) just forward of the main equipment center at body station 390 and buttock line 45R. Access to the battery units is through the main equipment center.
D. Principal airplane systems and indicators that are connected to the INS (Fig. 2) are listed below.
(1)
AC Power System (24-22-00)
(2)
Central Air Data Computer (CADC) (34-12-00)
(3)
Autoflight Systems (Chapter 22)
(4)
Weather Radar (34-43-00)
(5)
Magnetic Heading Reference System (MHRS) (34-21-00)
(6)
Attitude Director Indicator (ADI)
(7)
Horizontal Situation Indicator (HSI)
(8)
DME Interrogator (34-55-00)
(9)
VHF Navigation Receiver (34-31-00)
E. The navigation information relationships determined by the inertial navigation system are best described by referring to Fig. 3. These relationships are displayed in digital form on the control/display units and in analog form on the pilots' flight instruments.
(1)
True heading (T-HDG) is the angle between the airplane centerline and true north.
(2)
Magnetic heading (M-HDG) is the angle between the airplane centerline and magnetic north.
(3)
True airspeed (TAS) is the airspeed of the airplane with respect to the surrounding air and includes the wind velocity component.
(4)
Wind, head or tail, (WIND) is the wind on nose component in knots along airplane axis.
(5)
TIME (TIME) time to waypoint derived from distance along desired track and ground speed along present track.
EFFECTIVITY
AIRPLANES WITH LTN-72RL OR CONFIG LTN-92 INS 01 Page 1 Apr 25/91
34-41-00
INS NO. 1 MODE
SELECTOR UNIT INS NO. 3 MODE
SELECTOR UNIT
INS NO. 2 MODESEE D SELECTOR UNIT
SEE D SEE D PILOTS' LIGHTSHIELD
SEEA K
SEE J
INS NO. 3
ANNUNCIATOR
FIRST OFFICER'S INSTRUMENT PANEL
SEE L SEEF G I
CAPTAIN'S INSTRUMENT PANEL
SEEF GHI
INS NO. 2 CONTROL/ DISPLAY UNIT
SEE E INS NO. 1 CONTROL/ INS NO. 3 CONTROL/
DISPLAY UNIT DISPLAY UNIT
SEEE SEEE
VOR/ILS
INS
FLIGHT INSTRUMENT SWITCHING RELAY PANEL, P73
RADIO/INS SWITCH
A
NO. 1 SEE B SEE C
FWDNO. 3 NO. 2
MAIN EQUIPMENT INS BATTERYCENTER SHELF, E2-6 SHELF, E-12
NAVIGATION UNIT INSTALLATION BATTERY UNIT INSTALLATION B C
Inertial Navigation System Component Location
Figure 1 (Sheet 1)
EFFECTIVITY
CONFIG 3
AIRPLANES WITH LTN-72RL OR
799 Page 2
LTN-92 INS
34-41-00
Apr 25/91
INS AND ATTITUDE TRANSFER SWITCHES
ON AIRPLANES WITH LTN-72RL, ANNUNCIATOR READS READY NAV
Inertial Navigation System Component Location Figure 1 (Sheet 2)
EFFECTIVITY AIRPLANES WITH LTN-72RL OR
CONFIG 3LTN-92 INS
799 Page 3
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INS UPDATING ANNUNCIATOR INS BATTERY XFR SWITCH
VHF NAVIGATION CONTROL PANEL
INS NO. 3 ANNUNCIATOR
Inertial Navigation System Component Location
Figure 1 (Sheet 3)
EFFECTIVITY AIRPLANES WITH LTN-72RL OR
CONFIG 3 LTN-92 INS
799 Page 4
34-41-00
Apr 25/91
(6)
Wind speed (WND) is the wind direction in degrees and wind velocity in knots.
(7)
Track angle (T-TK) is the angle between the airplanes present track and true north.
(8)
Track angle (M-TK) is the angle between the airplanes present track and magnetic north.
(9)
Ground speed (GS) is the velocity with which the airplane is moving over the earth's surface.
(10)
Drift angle (DA) is the angle between the airplane's heading and present track.
(11)
Desired track angle (DTK) is the angle between true or magnetic north and an imaginary line on the ground connecting two successive waypoints.
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本文链接地址：747飞机维护手册AMM CHAPTER 34 - NAVIGATION 第34章导航2(127)
