Saab 37 Viggen: Difference between revisions

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|image = Saab JA-37 Viggen Blue Peter Livery.png
|image = Saab JA-37 Viggen Blue Peter Livery.png
|name = Saab 37 Viggen
|name = Saab 37 Viggen
|livery = 9 Liveries
|livery = 23 Liveries
|type = Fighter aircraft
|type = Fighter aircraft/Attack aircraft/STOL aircraft
|config = Canard aircraft/Delta-wing aircraft/Retractable gear aircraft
|propulsion = Single-engine jet
|manufacturer = Saab
|fdm = JSBSim
|fdm = JSBSim
|status-fdm = 4
|status-fdm = 4
|status-systems = 3
|status-systems = 5
|status-cockpit = 3
|status-cockpit = 4
|status-model = 3
|status-model = 4
|status = Early production
|status = Early production
|authors = Anders Lejczak, Justin Nicholson, Nicola B. Bernardelli, Isaac Protiva, Nikolai V. Chr.
|authors = Anders Lejczak/Justin Nicholson/Nicola B. Bernardelli/Isaac Protiva/Enrico Castaldi/Joshua Davidson/Nikolai V. Chr./Colin Geniet
|fgname = JA37
|fgname = JA37-Viggen
|development = http://nikolaivchr.github.io/flightgear-saab-ja-37-viggen
|fgname1 = AJS37-Viggen
|download = https://sites.google.com/site/fghangar
|development = https://github.com/NikolaiVChr/flightgear-saab-ja-37-viggen
|ready = bombable/canvas/checklist
|download = http://mirrors.ibiblio.org/flightgear/ftp/Aircraft/JA37.zip
|ready = canvas/checklist
|license = GPLv2+
|forumtid = 19130
}}
}}


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== Flightgear version ==
== Flightgear version ==
The package contains the variants: AJ-37, AJS-37 and JA-37.
The package contains two variants: AJS-37 and JA-37Di.
The Flightgear JA-37 version is the mid-80s upgraded version of JA 37 (not the JA 37D variant).


=== Feature overview ===
Notice that the JA37 is much more accurate and well developed than the other variants.
====Flightgear compatibility====
* The Viggen is compatible with Flightgear version 2.10 to 2016.3.1.
* A separate download is available for Flightgear 2.8. It will not be updated so often as the regular download.


===Flightgear compatibility===
* The latest Viggen version is compatible with Flightgear version 2020.3.1 or later.
== Help and Documentation ==
====Flight manual====
The [https://github.com/NikolaiVChr/flightgear-saab-ja-37-viggen/tree/master/Aircraft/JA37/Doc flight manual] is located under JA37/Doc/ in the aircraft directory. There is also a shortcut in the JA-37 menu to open it from FlightGear. There are two versions of the manual, for the JA-37Di and the AJS-37. Although it is far from completed, the flight manual is the most detailed and up to date source of information.
====In FlightGear====
The aircraft help dialog contains a summary of the keybindings, and some additional information.
Detailed [[Aircraft_checklists|checklists]] are available, including the full startup procedure.
====Other====
The file [https://github.com/NikolaiVChr/flightgear-saab-ja-37-viggen/blob/master/Aircraft/JA37/readme.ja37.txt readme.ja37.txt] contains some information on the most advanced JA-37 systems, which is not yet available in the flight manual.
====Tutorial video series====
Outdated to varying degrees. Still contains a lot of useful information, notably regarding navigation systems.
{{#ev:youtube|VGsWxUgy0Q}}
== Feature overview ==
====Aerodynamics====
====Aerodynamics====
* [[JSBSim]] FDM based on original Saab windtunnel data.
* [[JSBSim]] FDM based mostly on original Saab windtunnel data.
* 47 individual aerodynamic coefficients.
* 47 individual aerodynamic coefficients.
* Aerodynamic effect of air intake factor, ground effects and control surface shading.
* Aerodynamic effect of air intake factor, ground effects and control surface shading.
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====Flight control system====
====Flight control system====
* Tuned [[autopilot]] based on indicated instrument values, not true values. All settings supported except speed controlled from pitch.
* Autopilot with 3 modes: stability assist, attitude hold, and altitude hold. Autothrottle intended for landing, with speed and AoA hold modes.
* A/P can be set to follow other aircraft.
* Foreplane flaps are linked to the landing gear.
* Automatically controlled flaps.
* Elevon and rudder deflection is limited depending on hydraulic pressure, air density and speed.
* Elevon and rudder deflection is limited depending on hydraulic pressure, air density and speed.
* Filter based pitch, yaw and roll dampers lets the pilot control the plane without adverse effects such as turbulence, dutch roll, accelerated rolls and pitch oscillations which would otherwise be present.
* Filter based pitch, yaw and roll dampers lets the pilot control the plane without adverse effects such as turbulence, dutch roll, accelerated rolls and pitch oscillations which would otherwise be present.
* Nose wheel steering lock and limiting depending on ground speed.
* Gear will not retract on runway, and not extend above certain speeds.
* Gear will not retract on runway, and not extend above certain speeds.


====System====
====System====
* External power supply truck, generator or reserve generator produces AC voltages.
* Detailed electrical system based on the flight manual schematics. Includes several AC and DC bus, battery, external power, generator, ram air turbine. Each instrument and system is powered by the correct bus.
* DC voltage converted from AC or from battery.
* Battery drain and recharge.
* Instrument and landing light dims when not getting enough power and various systems shut down.
* Two hydraulic systems modeled, the second having a reserve pump.
* Two hydraulic systems modeled, the second having a reserve pump.
* Terrain warning system, with HUD indication and annunciator.
* Terrain warning system, with HUD indication and annunciator.
* Open canopy can be torn off by high wind speeds.
* Open canopy can be torn off by high wind speeds.
* Simulated airconditioner unit, which become handy when ice or fog forms on windshield in ALS.
* Simulated airconditioner unit, which become handy when ice or fog forms on windshield in ALS.
* Automated fuel system that works like in the real Viggen. It uses pneumatics, hydralics and electricity. It can be controlled manually also.
* Automated fuel system that works like in the real Viggen. It uses pneumatics, hydralics and electricity.
* TILS (tactical instrument landing system) that auto tunes to nearby ILS frequencies.
* TILS (tactical instrument landing system) that auto tunes to nearby ILS frequencies.
* Custom flight recorder records 53 extra properties for accurate replay functionality. Also record fidelity has been increased for smoother replay.
* Custom flight recorder records 53 extra properties for accurate replay functionality. Also record fidelity has been increased for smoother replay.
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* Gauges are in metric and have Swedish descriptions. But they have [[Tooltips]], showing Imperial and English units.
* Gauges are in metric and have Swedish descriptions. But they have [[Tooltips]], showing Imperial and English units.
* Switches, knobs and buttons have English text for convenience.
* Switches, knobs and buttons have English text for convenience.
* Custom [[Canvas]] [[HUD]] built from Saab flight manual with 4 modes of operation: navigation, landing, takeoff and tactical.
* Two custom [[Canvas]] [[HUD]] (one for each variant) built from Saab flight manual several operation modes.
* HUD values depend on indicated values, not real values.
* HUD values depend on indicated values, not real values.
* HUD can switch to Imperial units.
* HUD can switch between Imperial and Metric units (JA37 only).
* The callsign (or type), velocity vector and distance of the selected track is also displayed in the HUD. It also display nearest tower.
* At ILS landings the HUD will show a glideslope guide, if the runway supports it.
* HUD shows radar tracks of aircraft plus scenario objects like ferries, balloons, tankers, carriers, tanks, bus, trains etc.
* At ILS landings the HUD will show a glideslope guide, if the runway supports it. Also DME if supported and enabled.
* Other HUD features such as distance scale, variant altitude scale, heading scale on horizon in landing mode, diamond at missile lock, altimeter calibration warning etc.
* Other HUD features such as distance scale, variant altitude scale, heading scale on horizon in landing mode, diamond at missile lock, altimeter calibration warning etc.
* Radar with 180 Km (120 Km for AJ37) range that show MP and AI objects alike depend on hydraulic and electricity.
* Radar with 120 Km range that show MP and AI objects alike, simulating line of sight and pulse doppler filtering.
* In regards to MP planes the radar can be setup to be pulse doppler and/or not able to see through terrain.
* Several complex [[Canvas]] displays (radar screen on the AJS-37, radar and HSD on the JA-37).
* Complex navigation system on the JA-37, allowing to load 4 mission routes and 8 return routes.
* Auto-start and auto shut down scripts.
* Auto-start and auto shut down scripts.
* Very accurate sound warnings for terrain proximity, high load or AoA, speed, etc.
* Realistic modeled indicator panels for various warnings, alerts and notices.
* Realistic modeled indicator panels for various warnings, alerts and notices.
* Datalink between JA-37, which displays aircraft positions on the HSD.


====Engine====
====Engine====
* Volvo RM-8B (AJ37: RM-8A) turbine with accurate fuel consumption and performance in different air density and speed regimes.
* Volvo RM-8B (AJS37: RM-8A) turbine with accurate fuel consumption and performance in different air density and speed regimes.
* A thrust reverser is equipped which require proper hydraulics and electricity to work.
* A thrust reverser is equipped which require proper hydraulics and electricity to work.
* Afterburner that has 3 continuous zones of operation.
* Afterburner that has 3 continuous zones of operation.
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====Sound====
====Sound====
* 58 distinct sounds, including 19 annunciation warnings.
* 58 distinct sounds, including 19 annunciation warnings.
* 9 [[Multiplayer]] sounds enabled.
* When canopy is open wind and exterior engine sounds can be heard.
* When canopy is open wind and exterior engine sounds can be heard.
* No out of place sounds being played at start of sim.
* No out of place sounds being played at start of sim.
* When guided missiles hit, the sound is propagated according to the speed of sound at the altitude, and so the explosion will be realistically delayed.
* When guided missiles hit, the sound is propagated according to the speed of sound at the altitude, and so the explosion will be realistically delayed.
* Annunciator will warn of incoming guided air to air missile from ja37, m2000-5, f-15 or f-14b. It will also say from which direction.
* Thunder (when using adv. weather) and rain sounds.
* Thunder (when using adv. weather) and rain sounds.


====Armament====
====Armament====
* JA37: 30mm Cannon with authentic shell properties and accurate recoil.
* JA37: 30mm internal cannon, rocket pods, and RB-24J, RB-74, RB-99, RB-71 air to air missiles that can be fired at AI and MP alike.
* JA37: Unguided rocket pods and guided RB-24J, RB-74, RB-99 and RB-71 air2air missiles, that can be fired at AI and MP alike.
* AJS37: 30mm cannon pods, rocket pods, bombs, and guided RB-75, RB-04, RB-05, M90 and RB-15F air to ground missiles. Plus 3 kinds of sidewinders.
* AJ37: Unguided rocket and cannon pods and guided RB-75, RB-04, RB-05, M90 and RB-15F air2ground missiles. Plus 3 kinds of sidewinders.
* Detailed fire control system, with trigger safety, weapon selection knob (for the AJS 37).
* RB-24 / RB-24J works as rear aspect only.
* Several aiming modes for both JA37 and AJS37, including CCIP for cannon, rockets, and bombs.
* Dual releasing flares that work against RB24, RB-24J and RB74.
* Radar warning receiver, with both sound and display. Warns of radar, radar lock, and incoming missiles from MP aircrafts.
Compatible with the [[Bombable]] addon.
* IFF system for multiplayer.
* Ability to target a GPS coordinate and fire at it.
* Option to enable damage over multiplayer. No longer compatible with the [[Bombable]] addon, Sorry.


====Model====
====Model====
* Eleven authentic Swedish Airforce and 6 fictive Flightgear liveries included.
* 12 authentic Swedish Airforce and 10 fictive Flightgear liveries included.
* Selection view, with camera pointing to the aircraft from outside and towards the current selected MP/AI aircraft.
* Selection view, with camera pointing to the aircraft from outside and towards the current selected MP/AI aircraft.
* Ubershaded exterior model and cockpit panels. Also flood light is supported if model shader is enabled.
* Ubershaded exterior model and cockpit panels. Also flood light is supported if model shader is enabled.
* Normal mapped exterior model.
* Normal mapped exterior model.
* Fully ALS ready and also Rembrandt compatible, but with no light influences.
* Fully ALS ready, but with no light influences.
* Animated gear scissors, compressions and spinning wheels.
* Animated gear scissors, compressions and spinning wheels.
* Pilot eye view is tuned for getting good view of runways at landings, while at the same time give good view of HUD and instrument panel.
* Pilot eye view is tuned for getting good view of runways at landings, while at the same time give good view of HUD and instrument panel.
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====GUI====
====GUI====
* 4 [[Aircraft_Checklists|Checklists]]; startup with ext. power, startup with battery, takeoff and landing.
* 12 [[Aircraft_Checklists|Checklists]], 9 for normal procedures and 3 for emergency procedures. Most are translations of real Viggen checklists. Complete with markers, conditions, and bindings.
* Performance monitor with environment stats, aerodynamic ratios, landing/takeoff distance measurement and other interesting values.
* Performance monitor with environment stats, aerodynamic ratios, landing/takeoff distance measurement and other interesting values.
* Systems monitor, that reveals internal systems state.
* Systems monitor, that reveals internal systems state.
* Options panel, with many configurable options.
* Options panel, with many configurable options.
== Info ==
[https://raw.githubusercontent.com/NikolaiVChr/flightgear-saab-ja-37-viggen/master/Aircraft/JA37/changelog.txt Changelog]
== Media ==


=== Some HUD situations ===
=== Some HUD situations ===
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[[File:JA-37 HUD ready for takeoff.png|This is typical HUD situation before takeoff.]]
[[File:JA-37 HUD ready for takeoff.png|This is typical HUD situation before takeoff.]]


=== Media ===
=== Others ===
[[File:37 Viggen Red ghost livery.png|900x506px|Red ghost livery for the Saab JA-37 Viggen]]
[[File:37 Viggen Red ghost livery.png|900x506px|Red ghost livery for the Saab JA-37 Viggen]]
[[File:JA-37 Soaring.png|thumb|Vapour on the Viggen in a high AoA situation.]]
[[File:JA-37 Soaring.png|thumb|Vapour on the Viggen in a high AoA situation.]]
[[File:JA-37 Transonic.png|thumb|Transonic pass of freighter]]
[[File:JA-37 Transonic.png|thumb|Transonic pass of freighter]]
[[File:JA-37 Frontpanel.png|thumb|Frontpanel will full functioning indicator panels.]]
[[File:JA-37 Afterburner.png||Notice the light effect on the fuselage from the afterburner flame.]]
[[File:JA-37 Afterburner.png||Notice the light effect on the fuselage from the afterburner flame.]]
[[File:JA-37 Reversing.png||Reverse petals]]
[[File:JA-37 Reversing.png||Reverse petals]]
[[File:JA-37 Frontpanel.png|thumb|Frontpanel will full functioning indicator panels.]]
[[File:JA-37 Sunset.png||Grey/black camo livery]]
[[File:JA-37 Sunset.png||Grey/black camo livery]]
[[File:AJS-37 Attack.png|958×507px|AJS-37 doing an attack run.]]
[[File:AJS-37 Attack.png|958×507px|AJS-37 doing an attack run.]]
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See more screenshot in this gallery [https://sites.google.com/site/fghangar/ja-37-screenshots here].
See more screenshot in this gallery [https://sites.google.com/site/fghangar/ja-37-screenshots here].


Video of a couple of pilots having fun in the Viggen:
== Discord ==
 
The Flightgear Viggen has its own Discord chat server: [https://discord.gg/34CRATF Discord invite link]
{{#ev:youtube|zDGjCL8_Drc}}
 
=== Info ===
[https://raw.githubusercontent.com/NikolaiVChr/flightgear-saab-ja-37-viggen/master/Aircraft/JA37/changelog.txt Changelog]
 
== Looking for contributor ==
Looking for a contributor for these features, or what else you would like to work on: (I have many photos of these)
* More accurate gears model.


== External links ==
== External links ==

Latest revision as of 20:19, 1 May 2021

Saab 37 Viggen
Saab JA-37 Viggen Blue Peter Livery.png
Type Fighter aircraft, Attack aircraft, STOL aircraft
Configuration Canard aircraft, Delta-wing aircraft, Retractable gear aircraft
Propulsion Single-engine jet (Jet aircraft, Single-engine aircraft)
Manufacturer Saab
Author(s)
  • Anders Lejczak
  • Justin Nicholson
  • Nicola B. Bernardelli
  • Isaac Protiva
  • Enrico Castaldi
  • Joshua Davidson
  • Nikolai V. Chr.
  • Colin Geniet
FDM JSBSim
--aircraft= JA37-Viggen
AJS37-Viggen
Status Production
 FDM Stars-4.png
 Systems Stars-5.png
 Cockpit Stars-4.png
 Model Stars-4.png
Supports Canvas Checklists
Development
 Repository The development repository of the Saab 37 Viggen.
Download Download the Saab 37 Viggen aircraft package for the current stable release (2020.3).
Forum 'Saab 37 Viggen' topic on the FlightGear forum.
License GPLv2+

The Saab 37 Viggen is an all-weather attack/fighter aircraft. It had Europe's first pulse-doppler radar, and one of only two jet fighters in the world to sport reverse thrust, the other being Panavia Tornado. This version of JA-37 Viggen was manufactured from 1980-1990, and the JA 37D variant flew in the Swedish airforce until 2005. The AJ-37 Viggen was introduced in 1971, the AJS-37 Viggen in 1993.

AJS-37 in vertical ascend.

Flightgear version

The package contains two variants: AJS-37 and JA-37Di.

Notice that the JA37 is much more accurate and well developed than the other variants.

Flightgear compatibility

  • The latest Viggen version is compatible with Flightgear version 2020.3.1 or later.

Help and Documentation

Flight manual

The flight manual is located under JA37/Doc/ in the aircraft directory. There is also a shortcut in the JA-37 menu to open it from FlightGear. There are two versions of the manual, for the JA-37Di and the AJS-37. Although it is far from completed, the flight manual is the most detailed and up to date source of information.

In FlightGear

The aircraft help dialog contains a summary of the keybindings, and some additional information. Detailed checklists are available, including the full startup procedure.

Other

The file readme.ja37.txt contains some information on the most advanced JA-37 systems, which is not yet available in the flight manual.

Tutorial video series

Outdated to varying degrees. Still contains a lot of useful information, notably regarding navigation systems.

Feature overview

Aerodynamics

  • JSBSim FDM based mostly on original Saab windtunnel data.
  • 47 individual aerodynamic coefficients.
  • Aerodynamic effect of air intake factor, ground effects and control surface shading.
  • At high alpha asymmetric vortex detachment of left or right side, resulting in adverse effects.
  • Very high alpha handling including realistic departures such as stall, spiral dive, flat spin and inverted spin.
  • Aerodynamic response to payload. (droptank & armament)
  • Aerodynamic drag from canopy open and canopy detachment.
  • Significantly reduced lift and roll damping when wings detach.
  • High compliance with various performance numbers. (true not indicated instrument values)
  • Capable of landing with a heavy crosswind.
  • Mach tuck in transonic/supersonic regime.

Flight control system

  • Autopilot with 3 modes: stability assist, attitude hold, and altitude hold. Autothrottle intended for landing, with speed and AoA hold modes.
  • Foreplane flaps are linked to the landing gear.
  • Elevon and rudder deflection is limited depending on hydraulic pressure, air density and speed.
  • Filter based pitch, yaw and roll dampers lets the pilot control the plane without adverse effects such as turbulence, dutch roll, accelerated rolls and pitch oscillations which would otherwise be present.
  • Gear will not retract on runway, and not extend above certain speeds.

System

  • Detailed electrical system based on the flight manual schematics. Includes several AC and DC bus, battery, external power, generator, ram air turbine. Each instrument and system is powered by the correct bus.
  • Two hydraulic systems modeled, the second having a reserve pump.
  • Terrain warning system, with HUD indication and annunciator.
  • Open canopy can be torn off by high wind speeds.
  • Simulated airconditioner unit, which become handy when ice or fog forms on windshield in ALS.
  • Automated fuel system that works like in the real Viggen. It uses pneumatics, hydralics and electricity.
  • TILS (tactical instrument landing system) that auto tunes to nearby ILS frequencies.
  • Custom flight recorder records 53 extra properties for accurate replay functionality. Also record fidelity has been increased for smoother replay.
  • 7 internal fuel tanks plus a drop tank that can be jettisoned.

Failure system

  • 26 extra failures beside the standard ones.
  • Canopy motor, canopy hinges, wings attachment and individual gear locking mechanisms are preset to fail under specific conditions.
  • Engine fire preset to start under certain conditions. Can fail engine if left burning too long.
  • Crash-detection and high-G structural break tied into the failure system; it can randomly fail components proportional to the damage the plane takes.
  • Damage system for getting hit by ordnance.

Avionics

  • Gauges are in metric and have Swedish descriptions. But they have Tooltips, showing Imperial and English units.
  • Switches, knobs and buttons have English text for convenience.
  • Two custom Canvas HUD (one for each variant) built from Saab flight manual several operation modes.
  • HUD values depend on indicated values, not real values.
  • HUD can switch between Imperial and Metric units (JA37 only).
  • At ILS landings the HUD will show a glideslope guide, if the runway supports it.
  • Other HUD features such as distance scale, variant altitude scale, heading scale on horizon in landing mode, diamond at missile lock, altimeter calibration warning etc.
  • Radar with 120 Km range that show MP and AI objects alike, simulating line of sight and pulse doppler filtering.
  • Several complex Canvas displays (radar screen on the AJS-37, radar and HSD on the JA-37).
  • Complex navigation system on the JA-37, allowing to load 4 mission routes and 8 return routes.
  • Auto-start and auto shut down scripts.
  • Very accurate sound warnings for terrain proximity, high load or AoA, speed, etc.
  • Realistic modeled indicator panels for various warnings, alerts and notices.
  • Datalink between JA-37, which displays aircraft positions on the HSD.

Engine

  • Volvo RM-8B (AJS37: RM-8A) turbine with accurate fuel consumption and performance in different air density and speed regimes.
  • A thrust reverser is equipped which require proper hydraulics and electricity to work.
  • Afterburner that has 3 continuous zones of operation.

Sound

  • 58 distinct sounds, including 19 annunciation warnings.
  • When canopy is open wind and exterior engine sounds can be heard.
  • No out of place sounds being played at start of sim.
  • When guided missiles hit, the sound is propagated according to the speed of sound at the altitude, and so the explosion will be realistically delayed.
  • Thunder (when using adv. weather) and rain sounds.

Armament

  • JA37: 30mm internal cannon, rocket pods, and RB-24J, RB-74, RB-99, RB-71 air to air missiles that can be fired at AI and MP alike.
  • AJS37: 30mm cannon pods, rocket pods, bombs, and guided RB-75, RB-04, RB-05, M90 and RB-15F air to ground missiles. Plus 3 kinds of sidewinders.
  • Detailed fire control system, with trigger safety, weapon selection knob (for the AJS 37).
  • Several aiming modes for both JA37 and AJS37, including CCIP for cannon, rockets, and bombs.
  • Radar warning receiver, with both sound and display. Warns of radar, radar lock, and incoming missiles from MP aircrafts.
  • IFF system for multiplayer.
  • Option to enable damage over multiplayer. No longer compatible with the Bombable addon, Sorry.

Model

  • 12 authentic Swedish Airforce and 10 fictive Flightgear liveries included.
  • Selection view, with camera pointing to the aircraft from outside and towards the current selected MP/AI aircraft.
  • Ubershaded exterior model and cockpit panels. Also flood light is supported if model shader is enabled.
  • Normal mapped exterior model.
  • Fully ALS ready, but with no light influences.
  • Animated gear scissors, compressions and spinning wheels.
  • Pilot eye view is tuned for getting good view of runways at landings, while at the same time give good view of HUD and instrument panel.
  • Preloaded exterior view, for fast switching to exterior view.

Effects

  • Aerobatic smoke in yellow or blue.
  • Wing vapour under the right atmospheric conditions.
  • Under right conditions, contrails will form and if persistent contrail shader is on they will show also.
  • Lights that depends on distance viewed and sun position.
  • Beacon light that simulate rotating beacons.
  • Frost, fog and rain splashes on canopy in ALS. They depend on canopy position, aircondition, outside/inside temperate and dewpoint and rain.
  • Vapour cone in transonic regime.
  • Landing light cone on runway in ALS.
  • Explosion at crash if plane takes enough damage and has enough fuel.
  • In ALS rain drops will form on the fuselage.
  • Buffeting of cockpit view, at high G, on runway, transonic and high alpha, depending on altitude.

Multiplay

  • The following is transmitted and shown over MP: Gear compression, flight surfaces animation, afterburner flame, engine flame light, landing light, flash light, beacon lights, navigation lights, canopy animation, canopy detachment, wings detachment, explosion, wing vapour, engine smoke, reversers, frontgear steering, missiles, rocket pods, drop tank, transonic vapour, contrails, aerobatic smoke, external power truck, control surfaces, livery and engine heat blur.
  • Different Viggen version are to high degree compatible with each other in Multiplayer.

GUI

  • 12 Checklists, 9 for normal procedures and 3 for emergency procedures. Most are translations of real Viggen checklists. Complete with markers, conditions, and bindings.
  • Performance monitor with environment stats, aerodynamic ratios, landing/takeoff distance measurement and other interesting values.
  • Systems monitor, that reveals internal systems state.
  • Options panel, with many configurable options.

Info

Changelog

Media

Some HUD situations

The HUD assists with ILS landings. This is how the HUD looks most often. This is typical HUD situation before takeoff.

Others

Red ghost livery for the Saab JA-37 Viggen

Vapour on the Viggen in a high AoA situation.
Transonic pass of freighter
Frontpanel will full functioning indicator panels.

Notice the light effect on the fuselage from the afterburner flame. Reverse petals Grey/black camo livery AJS-37 doing an attack run.

See more screenshot in this gallery here.

Discord

The Flightgear Viggen has its own Discord chat server: Discord invite link

External links