Chinook CH-47/Avionics - Revision history

Tsukino.firethorn: /* Transponder Chat Commands */

2022-03-06T21:08:23Z

‎Transponder Chat Commands

Kelly: /* Transponder Chat Commands */

2022-03-06T21:07:11Z

‎Transponder Chat Commands

Tsukino.firethorn: /* Transponder Chat Commands */

2022-03-06T21:06:20Z

‎Transponder Chat Commands

Tsukino.firethorn: /* Transponder Chat Commands */

2022-03-06T21:05:35Z

‎Transponder Chat Commands

Tsukino.firethorn: /* Transponder Chat Commands */

2022-03-06T21:04:22Z

‎Transponder Chat Commands

Kelly at 19:52, 20 June 2021

2021-06-20T19:52:15Z

Kelly: /* AFCS Coupled Navigation */

2021-06-20T19:50:46Z

‎AFCS Coupled Navigation

Kelly: /* Flying an Approach */

2021-06-20T19:48:46Z

‎Flying an Approach

Kelly: /* Flying a Course */

2021-06-20T19:44:36Z

‎Flying a Course

Kelly: /* Flying a Course */

2021-06-20T19:43:56Z

‎Flying a Course

@@ Line 339: / Line 339: @@
 !Description
 |-
-|<tt>x&nbsp;[nn-]nnnn	</tt>
+|<tt>x[nn-]nnnn	</tt>
 ||Enter four or six-digit transponder code.
 |-

@@ Line 342: / Line 342: @@
 ||Enter four or six-digit transponder code.
 |-
-|<tt>x +[modes...]	</tt>
+|<tt>x + [modes...]	</tt>
 ||Turn on one or more modes.
 |-
-|<tt>x -[modes...]	</tt>
+|<tt>x - [modes...]	</tt>
 ||Turn off one or more modes.
 |-
-|<tt>x =[modes...]	</tt>
+|<tt>x = [modes...]	</tt>
 ||Set the active modes.
 |-
-|<tt>x /[modes...]	</tt>
+|<tt>x / [modes...]	</tt>
 ||Toggle one or more modes.
 |-

@@ Line 339: / Line 339: @@
 !Description
 |-
-|<tt>x&nbsp; [nn-]nnnn	</tt>
+|<tt>x&nbsp;[nn-]nnnn	</tt>
 ||Enter four or six-digit transponder code.
 |-

@@ Line 339: / Line 339: @@
 !Description
 |-
-|<tt>x [nn-]nnnn	</tt>
+|<tt>x&nbsp; [nn-]nnnn	</tt>
 ||Enter four or six-digit transponder code.
 |-

@@ Line 339: / Line 339: @@
 !Description
 |-
-|x [nn-]nnnn	||Enter four or six-digit transponder code.
+|<tt>x [nn-]nnnn	</tt>
 |-
-|x +[modes...]	||Turn on one or more modes.
+|<tt>x +[modes...]	</tt>
 |-
-|x -[modes...]	||Turn off one or more modes.
+|<tt>x -[modes...]	</tt>
 |-
-|x =[modes...]	||Set the active modes.
+|<tt>x =[modes...]	</tt>
 |-
-|x /[modes...]	||Toggle one or more modes.
+|<tt>x /[modes...]	</tt>
 |-
-|x cod nnnnnnnn	||Set the COD for encrypted modes.
+|<tt>x cod nnnnnnnn	</tt>
 |-
-|x hold	||Set M4 knob to 'hold'.
+|<tt>x hold	</tt>
 |-
-|x hold/a/b/zero	||Set M4 knob to specific position.
+|<tt>x hold/a/b/zero	</tt>
 |-
-|x off/stby/normal/ta/tara/emer	||Set master knob to specified position.
+|<tt>x off/stby/normal/ta/tara/emer	</tt>
 |}

← Older revision		Revision as of 19:52, 20 June 2021
Line 280:		Line 280:

	When entering an approach using coupled navigation, some special rules apply to how the GPS will fly the approach. If the entry angle is less then 30 degrees, the GPS will simply fly directly through the IAF. For entry angles between 30 and 90 degrees, the GPS will lead a turn onto the approach path. For approach angles between 90 ad 150, the GPS will lead a turn onto the "back course" intially flying in the opposite direction to the course until it is far enough out (based on speed) to make a 180 degree reversal and rejoin the approach path. Finally for approach angles greater than 150 degrees, the GPS will fly the aircraft through the IAF, join the back course, then do a course reversal.		When entering an approach using coupled navigation, some special rules apply to how the GPS will fly the approach. If the entry angle is less then 30 degrees, the GPS will simply fly directly through the IAF. For entry angles between 30 and 90 degrees, the GPS will lead a turn onto the approach path. For approach angles between 90 ad 150, the GPS will lead a turn onto the "back course" intially flying in the opposite direction to the course until it is far enough out (based on speed) to make a 180 degree reversal and rejoin the approach path. Finally for approach angles greater than 150 degrees, the GPS will fly the aircraft through the IAF, join the back course, then do a course reversal.
		+
		+	=== IFF Transponder ===
		+
		+	[[File:transponder.png\|thumb\|right\|
		+	<figure id="fig:transponder"><caption>Transponder</caption></figure>
		+	]]
		+
		+	[[File:COD entry.png\|thumb\|right\|
		+	<figure id="fig:cod-entry"><caption>COD Entry</caption></figure>
		+	]]
		+	==== Introduction ====
		+
		+	The AN/APX-112(KS) IFF (Identify Friend or Foe) transponder provides automatic identification in the Shergood Radar System. The unit is suitable for both civilian and military use. Aircraft using this transponder will show up on the Shergood map. The system receives, decodes and replies to interrogations in Modes 1, 2, 3/A, 4, 5 and C. Each mode can be individually enabled or disabled by the pilot. The modes that are enabled control what information is sent and to who it is distributed. Power to the unit is supplied by the #2 DC Bus.
		+
		+	The main panel of the transponder is shown in the <xr id='fig:transponder'/>. A display at the top of the unit shows the active modes and the current transponder reply code. Below the display are knobs and buttons to control the operation of the unit. These will be described in the following sections.
		+
		+	==== Interrogation Modes ====
		+
		+	Transponders reply to interrogations in one or more modes. The transponder can be configurured to reply to any one or all of these modes at the same time. This unit supports the following modes:
		+	* Mode 1 - This is a two-digit "mission code". It is displayed as the two digit number prefix. When Mode 1 is active, the two digit code will be shown as part of the squawk code on the radar map.
		+	* Mode 2 - Replies with the four digit reply code shown after the "-" on the display. This mode is for military use.
		+	* Mode 3/A - Mode 3 is equivalant to the Mode A reply from a standard civilian transponder. It replies with the four digit code shown after the "-".
		+	* Mode 4 - Replies with the four digit reply code only to users with the correct IFF COD (Code of the Day). The COD is an 8 digit number entered into the unit and agreed upon among friendly forces.
		+	* Mode S - Replies withh additional aircraft-specific information beyond the squawk code, including aircraft type and tail number. (civilian and military use)
		+	* Mode 5 - Encryped version of Mode S for military use. Uses the same COD entered for Mode 5.
		+	* Mode C - Used in conjunction with the other modes to include altitude data.
		+
		+	Modes are enabled or disabled by pressing the BIT button followed by one of the main keypad buttons. The mode shown on the upper part of the button will be enabled or disabled. Note that the RAD, MIC and HOME functions are not active on this unit.
		+
		+	==== Master Control Switch ====
		+
		+	The Master Control Switch is located below the display on the right-hand side. It has the following settings.
		+	* OFF - Unit is powered down and no reply is sent. All information is reset to defaults when the unit is turned off.
		+	* STBY - Unit is placed in stand-by mode. When in stand-by mode, the unit may be configured with a reply code and/or a COD, but not replies will be sent and the aircraft will not be displayed on the map.
		+	* NORMAL - This is the normal operating mode for the transponder. Replies will be sent as configured.
		+	* TA and TA/RA - These settings are reserved for use with TCAS units and are not implemented in this unit. Setting the device to these codes will operate the same as NORMAL.
		+	* EMER - <span style="color:#f00">Indicate an emergency condition. Replies are sent in all modes, and the emergency transponder reply code of 7700 is used. This mode should only be used in the event of an emergency that threatens the safety of the aircraft</span>
		+
		+	==== Entering a Reply Code ====
		+
		+	The reply code is entered by simply pressing the number keys to set the desired code. You may enter either four digits followed by ENT to set the four digit reply, or six digits to enterr both the two-digit Mode 1 value and the four digit code used by Modes 2,3 and 4. The back arrow key on the bottom row can be used to delete the last entered value. Pressing the backarrow after all digits have been entered will reset the display to the current code.
		+
		+	==== Entering the COD ====
		+
		+	The COD (Code of the Day) is entered by setting the M4 Codes selector below the display on the left-hand side to the HOLD position (see <xr id='fig:cod-entry'/>). The COD is number that is shared among friendly forces to identify friendly aircraft, and hide radar replies from enemy aircraft. After entering the code, set the selector to either A or B. All friend forces should use the same A/B setting as well. Turning the M4 Codes selector to ZERO will erase the entered COD and make it all zeros. The COD will also be erased when the unit is powered off.
		+	When viewing the [https://www.shergoodaviation.com/radar.php Shergood Radar Map page], aircraft with a COD entered that matches the code entered for the IFF code on the web page will show up in green to indicate they are friendly forces.
		+
		+	==== Fully Coded Transponder Usage ====
		+
		+	For fully coded transponder use, modes other than 4, 5 and C should be disabled. This will result in your aircraft being visible on the map only to those users who know the COD entered into your transponder.
		+
		+	==== Transponder Chat Commands ====
		+
		+	Chat commands are available as listed below for the various transponder functions described in this section:
		+
		+	{\| class=wikitable
		+	!Command
		+	!Description
		+	\|-
		+	\|x [nn-]nnnn \|\|Enter four or six-digit transponder code.
		+	\|-
		+	\|x +[modes...] \|\|Turn on one or more modes.
		+	\|-
		+	\|x -[modes...] \|\|Turn off one or more modes.
		+	\|-
		+	\|x =[modes...] \|\|Set the active modes.
		+	\|-
		+	\|x /[modes...] \|\|Toggle one or more modes.
		+	\|-
		+	\|x cod nnnnnnnn \|\|Set the COD for encrypted modes.
		+	\|-
		+	\|x hold \|\|Set M4 knob to 'hold'.
		+	\|-
		+	\|x hold/a/b/zero \|\|Set M4 knob to specific position.
		+	\|-
		+	\|x off/stby/normal/ta/tara/emer \|\|Set master knob to specified position.
		+	\|}

@@ Line 261: / Line 261: @@
 ==== AFCS Coupled Navigation ====
-The navigation system can be used in conjunction with the AFCS to perform coupled navigation and approaches. In order to fly a coupled approach, you must have HDG, IAS, and BARO ALT hold modes active. You must also have the HSI in NAV mode.
+The navigation system can be used in conjunction with the AFCS to perform coupled navigation and approaches. In order to fly a coupled approach, you must have HDG, IAS, and BARO ALT hold modes active. You must also have the HSI in GPS mode.
 The following procedure can be used to perform a coupled flight from the ground at the originating airport to a destination airport:
 #Enter route including approach in the GPS
 #Activate hover mode on the AFCS
 #Type "ap alt 800" (or other cruise altitude)
-#When aircarft picks off ground enable NAV mode on HSI
+#When aircarft picks off ground enable GPS mode on HSI
 #Type "ap ias 100" (or other speed) to set cruise speed of 100 knots.
 #About 1km before IAF at destination:

@@ Line 206: / Line 206: @@
 ==== Flying an Approach ====
 An approach is a procedure for transitioning by use of instruments between the enroute component of flight to a position from which a landing can be made. The Pelican supports ILS approaches with both horizontal and vertical guidance with a recomended approach speed of 60 knots.  shows a typical ILS approach in the Shergood navigation system. The top part of the figure shows the horizontal component (called the localizer), while the lower portion shows the vertical component (called the glideslope).
@@ Line 224: / Line 220: @@
 At the IAF, the glideslope will typically be fully deflected up and gradually come down to the center as the aircraft approachs the FAF.  shows the HSI at the FAF at the point of glideslope intercept (slightly high).
 ===== Marker Beacon =====
-A marker beacon light (see <xr id='fig:marker-beacon'/>) is mounted on the pilot and copilot sides of the main panel.  This light will flash coupled by an audio alert when the aircraft passes the outer, middle and inner markers of an approach.  The outer marker tone is an slow, low-pitch intermittent tone; the middle marker tone is a medium pitch tone of alternating dots and dashes; and the inner marker tone is a rapid high-pitched intermittent tone. The outer, middle and inner markers will be triggered at the FAF, MAP and TDZ, respectively.  A switch labeled MKR BCN on the main panel controls the sensitivity of the marker beacon receiver.  In HIGH mode the detection radius for the marker is increased by 50% compared to LOW mode.
+Also of note are the three lights labeled "O", "M" and "I" below the HSI (see <xr id="fig:outerMarker" />). These are the marker beacons. The letters correspond to the outer, middle and inner markers, respectively. When passing a marker on an active approach, the corresponding marker beacon light will flash and an intermittent tone will sound. The Outer Marker is at the FAF, the Middle Marker is at the MAP and the Inner Marker is at the TDZ.
 ==== Procedure Turns ====

@@ Line 160: / Line 160: @@
 A route is a sequence of waypoints from a starting location to a destination. The lines between waypoints are segments, and the segment currently being flown is the current segement. Consider the example in  with a route starting at ITAWT, passing through ITAWA, and ending at PUDYE. In this case, the segment between ITAWA and PUDYE is the current segement, or "track".
 The GPS system in the S-61R is designed for flying tracks. In the example above, the track from ITAWA toa PUDYE is on a 89 degree heading, so the track indicator on the HSI shows (<xr id='fig:tracking'/>) an approximately East heading. Note that the track indicator shows an 89 degree course independent of the actual heading of the aircraft (shown by the reference mark at the top of the HSI).
 <br clear=all>
@@ Line 174: / Line 178: @@
 |}
 When correcting for a course deviation, you should turn the aircraft toward the CDI with the amount of correction corresponding to the amount of deflection. As you converge on the track, the CDI will move to the center and you should gradually decrease the amount of correction. In general, your correction should not be more than 30 degrees to avoid overshooting the track.

@@ Line 156: / Line 156: @@
 [[File:cdimap.png|thumb|right|
 <figure id="fig:tracking"><caption>Tracking</caption></figure>
 ]]
@@ Line 186: / Line 183: @@
 In some cases, when you are significantly off course, it may be desirable to reset the "start" coordinate of track. You can do this by pressing the [[File:gbDirectTo-16.png]]
 button on the GPS. This will reset the current track to start at the current location and center the CDI.
 ==== Waypoint Passage ====