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Reading the various available MIG29 references I went searching for the "Expected Target range" radar setting as in FC3 MIG29. I couldn't find any references to it. Does it exist in the real Mig29 ? If so where is the switch that sets it ?

Or is it a function of the range that the TDC cursour is set to?

Posted (edited)

Ah ok thanks ... and do you get a value readout in the HUD like we do in the FC3 MIG29 ? In other words how do you know what Expected Target range you have set ?

And another question. Is it this setting of expected target range that sets the Antenna bar setting <20Km 16.5deg elev coverage and >20km 13.5deg elevation coverage ?

Edited by IvanK
Posted (edited)
8 hours ago, IvanK said:

Ah ok thanks ... and do you get a value readout in the HUD like we do in the FC3 MIG29 ? In other words how do you know what Expected Target range you have set ?

And another question. Is it this setting of expected target range that sets the Antenna bar setting <20Km 16.5deg elev coverage and >20km 13.5deg elevation coverage ?

It is signified by a specific symbol on range bar, item 26 in this picture. Yes it does change that, but remember it changes much less and less drastically for manual radar control. Only GCI control really changes scan pattern vs range a lot. 
 

Fig 3.5 shows GCI intercept, left side is HUD right is IPV. It’s incorrect in showing heading tape while locked 

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Edited by AeriaGloria
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Posted
27 minutes ago, AeriaGloria said:

It is signified by a specific symbol on range bar, item 26 in this picture. Yes it does change that, but remember it changes much less and less drastically for manual radar control. Only GCI control really changes scan pattern vs range a lot. 

Umm..isn’t it actually item 32 (manual range input) in the diagram? Isn’t the bar (#26) actually the range to target based on the radar return? 

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Posted (edited)
3 hours ago, Ironhand said:

Umm..isn’t it actually item 32 (manual range input) in the diagram? Isn’t the bar (#26) actually the range to target based on the radar return? 

You would think but apparently the number (32) is just for navigation mode. 
 

Item 39 is STT range arrow, and item 43 is range from radar quasi scan. As you found item 26 is radar range that you set with the wheel or the GCI commanded range. This comes with some paragraphed that describe most of it 

Range scale I with digitalization when working with SEI with the MO-ket

radar has the following range scales: 150, 100, 50, 25 and 10 (when

working with the OEPRIK only two scales 5 and 1 km).

The contour arrow 39 shows the current range and can move along the

range scale from 0 to the maximum value. At the ground guidance stage,

the arrow shows the current range transmitted via the control unit (Table

2.2). At the on-board guidance stage (ATTACK or homing mode), the arrow

shows the current range from the radar control system to the target.

The thin line segment 26, moving along the range scale, indicates the

current range measured by the radar in the Quazi scan mode in

conjunction with the OEPRNK. The crosshair with a gap in the middle 41 in

the center of the screens fixes the construction axis of the aircraft and

weapons.

Aircraft index 15 displays the aircraft position in space by roll. Two lines 19

(to the left and right of the aircraft index) mark the beginning (zero) of the

roll scale (Table 3.2).

To the right of the aircraft index, a movable pitch scale 25 is displayed with

three numbers located vertically,

along with artificial horizon line 22, intersecting the screen. The numbers of

positive pitch angle values are underlined by a segment of a solid line, and

negative ones by dashed lines. The pitch angle values are given by the

vertical and course information complex (Table 3.2).

Small ring 7 in deltaH coordinates and it shows the deviation of the current

trajectory from the specified flight trajectory of the aircraft. The pilot must

hold this ring in the center of the crosshair. The parameters deltaH and

delta course are calculated in the on-board computer according to the

specified values from the GCI command line(Table 2.2), and the current

values of height and course, measured on board using the IK-VK-80. The

large ring with point 14 at coordinates delta pitch and delta heading shows

the deviation of the current flight path from the specified one, calculated in

the on-board computer using data. During correct piloting, the pilot holds

the ring on the crosshairs (frames the crosshairs with the ring).Large ring without point 18 - mark of deviation of course and glide path

from the given trajectory of the aircraft. It is used at the landing stage of

the aircraft.

Rectangle 6, called the range strobe, is used to select a target and capture

it for automatic tracking by superimposing the rectangle on the selected

target. In the AVT. mode, the strobe is controlled by the on-board

computer. The strobe is controlled by angles and range in manual mode

from the KU-ZI key located on the RUS.

Dash marks 5 and 8 are marks of detected targets, which are displayed on

the screens in the REVIEW and SNP modes. A dash mark with a symbol

like PARACHUTE means "own" target, i.e. a target with an identification

mark. Rhombus 17 in coordinates 4 and 48 indicates the position of the

target in space, since it records the position of the equal-signal direction of

the antenna in the RNP mode (Table 3.3).

The thickened horizontal lines 40, 38 and 37 along the range scale show

the dimensions of the missile launch zone. Line 40 characterizes the

permitted maximum launch range for a non-maneuvering target (Dr 1), Line

38 characterizes the maximum permitted launch range (Dr 2) for a

maneuvering target, and line 37 marks the minimum permitted launch

range (Dmin).

The abbreviation 23 ОТВ is displayed on the screens when the ОТВОРОТ

command is issued, or when Dmin is larger then present range. In this case, ring 14 quickly

moves to the upper left or right corner of the indication field, indicating the

rational direction of the turn.

The abbreviation PR means LAUNCH ALLOWED, after this command the

pilot has the right to press the BC button. Arrow 36 at the beginning of the

range scale shows the direction of the target speed vector in the horizontal

plane. It lights up after the RLPK switches to the RNP mode. The direction

and module of the vector are determined by the RLPK data and calculated

in the BCEM. Section 34 of line in the lower part of the indicator shows the

position of the search zone in azimuth relative to the viewing zone.

Dashed lines 33 indicate the presence of weapons on all six suspensions.

Depending on the position of the EXTERNAL-INTERNAL toggle switchlocated near the throttle, either two internal (middle) or four external lines

are illuminated. The numbers 30 above the dashed lines are illuminated

after passing the built-in control in the RGS (numbers 1 and 2) or after

target acquisition by the TGS of missiles R-73 and R-60M (numbers 3, 4, 5

and 6). If the number is framed by a square 31, this means that there is an

emergency failure of the missile to leave the suspension. Letters 35 and 29

indicate the readiness of the course-gliding system to land.

The numbers 32 indicate the range to the landing point (landing airfield,

radio beacon) or the range of manual input of the control lever if the index

42 is displayed.

The upper part of the indicators displays flight and navigation information.

4 indicates the GCI received speed, and 3 indicates the current flight

speed of the fighter in kilometers per hour. Under the line of these

numbers, a movable benchmark 2 is displayed, which can occupy three

fixed positions under the middle of the line or to its edges. The middle

position indicates that the current flight speed does not change. With an

increase in speed (positive acceleration), the benchmark occupies the

extreme right position under the line, with a decrease in speed, the

extreme left position.

The movable scale 10 with three two-digit numbers and a fixed reference

point 9 indicates the current course based on information received from

the IK-VK-80. To determine the true course value, the numbers on the

scale must be multiplied by ten.

The number 12 indicates the set flight altitude, which comes via the GCI

command line, and the number 13 indicates the current flight altitude. The

current flight altitude can be measured by a barometric or radio altimeter.

When the altitude from the radio altimeter is indicated, the letter "P" is

displayed after the number.

To the left of the range scale, a set of one-time commands coming to the

SEI from the on-board digital computer and via the control switchgear line

is displayed. The abbreviation PPS or ZPS indicates the direction of attack

from the front or rear hemisphere of the target. The letters "PL" or "TП"

mean that the RLPK or OEPRNK is leading. The letter "B" (VERTICAL) is a

one-time command transmitted via the control GCI line, indicating the

need for an energetic maneuver in the vertical plane with a gain in altitude.The letters "A" and "r" (ATTACK and HILL, respectively) are issued from the

on-board digital computer after target acquisition for automatic tracking.

The display of the letter "A" indicates the completion of transition

processes in the RLPK and its readiness to begin an attack, or laser

emission. The letter “r” is displayed only when it is necessary to perform

an aircraft maneuver in the vertical plane (with a gain or loss of altitude).

The letter "C" (OWN) means that the “lock only negative IFF” switch is

removed (the OWN CAPTURE switch is in the OWN position) and the

"own" target has been captured. A one-time command "Φ" (FORSAH) is

sent via the GCI line to turn on the engine afterburner. The one-time

commands “!” and the letter "T" coming from the ground station via the

GCI line mean RETARGETING and END OF GUIDANCE, respectively. The

abbreviations AП and ПП signal the pilot about the presence of active and

(or) passive interference.

In the lower right corner of the HUD and IPV indicators, the alphanumeric

index 27 of the selected weapon type is displayed. In the same place, but

on the HUD, the number 42 framed by a square is displayed, which shows

the presence of NAR or gun ammunition in quarters from the full

ammunition (4,3,2,1,0). The number 28 on the IPV shows the number of

the line along which the antenna moves (1-4 or 1-6). In addition, only on

the IPV is line 16 displayed - the border of the screen field with a fixed

triangular horizon reference in the middle of the line; a vertical segment of

line 20, showing the position of the search zone relative to the viewing

zone in the vertical plane.

Of the entire volume of information indicated on the ILS and IPV screens,

only that information is displayed that is necessary for completing a

specific task being solved is displayed.

As an example, let us consider the features of operation at the stages of

ground guidance and homing (airborne-RLPK guidance) and the display of

information on the SEI-31 when selecting R-27RI missiles for combat use.

At the stage of ground guidance of the fighter to the GCI target (the so-

called instrument guidance), signals and one-time commands are

transmitted via radio line 3502, which are intended for controlling the

aircraft, the RLPK complex and weapons. Information intended for

controlling the aircraft at the ground guidance stage is shown on the ILS

and IPV indicators, shown in Fig. 3. Let us consider in more detail the set

of commands intended for controlling the RLPK. Note that the receptionand processing of transmitted signals and commands will be possible only

when the GUIDANCE toggle switch on the PSR-ZI console is turned on

and the IZL. EKV. OFF switch on the PUR-ZI is set to the EKV position.

After the fighter is brought into the zone from which it can make radar

contact with the target according to the GCI 3502-20 data, target

designation signals are transmitted to the antenna system of the radar

control system (B; Σ (Table 2.2)) and commands for remote activation of

the BRAS transmitter for emission and line-by-line movement of the

antenna. If the KRU operates in the LAZUR mode, then emission is

activated by a set of commands "100" ("60" or "36") and PPS when

intercepting a target from the forward hemisphere or commands "36" and

ZPS when intercepting a target from ZPS. In the first case, the VCHP

operating mode is automatically activated (if the switch on the PUR-ZI is in

the AVT position), and in the second case, the SCHP operating mode.

Thus, the radar control system begins to operate in the REVIEW mode,

the detected targets are displayed on the ILS and IPV screens (Fig. 3,5,6).

The range strobe is automatically set to the specified target if it does not

respond to the IFF system request. The pilot continues to fly the fighter

according to the commands of the vertical ring, aligning it with the

crosshair center.

After pressing the MRK ZAKVAT PZ button on the throttle, the RLPK

switches to the RNP mode. A large ring, missile launch zones appear on

the indicator screens (Fig. 3.5, c) and the R-27RI missile radar operability

check begins. Upon completion of the check, the numbers 1 and 2 are

displayed. The pilot, placing the ring on the crosshair, attacks the target

and continues approaching the target. When the current range is equal to

or less than Drmax! the PR (LAUNCH ALLOWED) command is displayed

and the pilot can press the BK button.

For other operating modes of the control system, the indication on the IDS

and IPV is similar to that discussed above”

 

It is from the MiG-29B technical manual. 

Edited by AeriaGloria

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