FSLTL User Guide

1. Start MSFS and load it into a flight
2. Open the FBW Installer if it is not open.
3. Once the FBW Installer opens, in the left plane, click on the radar icon (3rd icon from the top). This will bring you to the FSLTL menu where you will see two separate options for FSLTL Traffic Base Models and FSLTL Traffic Injector.
4. Click on FSLTL Traffic Injector and you should see a status of Not Running under the image header. To start the injector, click on Start to the right and you will see a command prompt window open stating that the injector has started and connected to the simulator.
5. You will be prompted if you would like to change the values for the injector. If you would like to do so, enter Y, otherwise enter N.
6. Happy flying amongst busy skies! To stop the installer, simply click Stop in the FBW Installer.

FSLTL Injector Options

On the launch of the injector, you will be presented with the ability to change various options which affect how traffic is depicted, below describes what these are and their effects.

Live Traffic Aircraft Settings

Setting	Description	Default	Setting Range	Config file attribute
Max Active IFR Aircraft	Sets the overall maximum number of IFR traffic to be injected. (IFR = aircraft has origin and destination) This value is then proportioned to air and ground traffic based on your altitude (AGL): user on the ground - 50% for air, 50% for on the ground user above 10000ft - 75% for air, 25% for on the ground user above 20000ft - 100% for air, 0% for on the ground	80	0 (disable) to unlimited	ifraircraftlimit
Max Active VFR Aircraft	Sets the overall maximum number of VFR traffic to be injected. (VFR = aircraft missing origin and/or destination)	20	0 (disable) to unlimited	vfraircraftlimit
Max Injection Radius: Airborne Aircraft	Maximum distance from user aircraft that airborne AI aircraft will be injected (Airborne aircraft will be removed when distance is this setting +10km)	150	25-150	spawnradiusair
Max Injection Radius: Ground Aircraft	Maximum distance from user aircraft that ground AI aircraft will be injected (Ground aircraft will be removed when distance is this setting +10km)	50	10-150	spawnradiusground
FlightPlanDB API key	(Optional but highly recommended) FlightPlanDB allows the use of more realistic flightplans to be used with IFR AI traffic. (without this API key, AI aircraft flightplans will be a simple A -> B route) Create an account at https://flightplandatabase.com and enter the API key from the settings page to use this feature.	No key	n/a	flightplannerdbapikey
Use SIDs for departure	Enables departure procedures which are determined based on the flight plan and currently active origin airport runways the sim is using or current METAR. The SID in use will be announced in the console window for pre-flight.	Yes	Yes/No	sids
Use STARs for arrival	Enables arrival procedures which are determined based on the flight plan and currently active destination airport runways the sim is using or current METAR. The STAR in use will be announced in the console window for enroute aircraft.	Yes	Yes/No	stars

 

Static/Historical Aircraft Settings

Setting	Description	Default	Setting Range	Config file attribute
Additional Airline Parked Aircraft	Sets the amount of static parked airline aircraft at airports based on historical data. (setting value is scale linked to percentage of parking spots >= 10m radius; 1 = 5% of available parking; 10 = 50% of available parking)	2	0 (none) - 10	staticlimit
Max Airline Parked Aircraft	Sets an absolute maximum number of static airline aircraft per airport. The number of parked aircraft will be the lesser of this value and the value the injector calculates from the Additional Airline Parked Aircraft setting. This can be useful to limit large amounts of static aircraft at large airports.	30	0 (none) - 100	staticlimitmax
Additional GA Parked Aircraft	Sets the amount of static parked GA aircraft at airports based on historical data. (setting value is scale linked to percentage of parking spots < 10m radius; 1 = 5% of available parking; 10 = 50% of available parking)	2	0 (none) – 10	staticgalimit
Max GA Parked Aircraft	Sets an absolute maximum number of static GA aircraft per airport. The number of parked aircraft will be the lesser of this value and the value the injector calculates from the Additional GA Parked Aircraft setting. This can be useful to limit large amounts of static aircraft at large airports.	15	0 (none) - 100	staticgalimitmax

 

Utility/Miscellaneous Settings

Setting	Description	Default	Setting Range	Config file attribute
Separation Control	Yes = The injector will attempt to create separation between aircraft on approach to an airport (More details can be found on the FSLTL Discord: #injector-stable channel; check out the release notes for v1.6.0)	Yes	Yes/No	separation
Blocked Aircraft Removal Time	Time in seconds to remove aircraft that should be moving but are not (e.g. stuck in pushback, in taxi, holding for too long, etc). Recommend a value of 120 seconds or greater to prevent aircraft awaiting take-off from being removed too quickly. Note: Does not prevent the sim from removing aircraft on its own	120	60 – unlimited (in 30 second increments)	secstilremove
Disable showing blank liveries	No = the injector will use blank liveries for models we have but no suitable livery match was found. Yes = the injector will not use blank liveries (Note: an aircraft without a model/livery will not be injected) (GA Models excluded for now)	No	Yes/No	nofallback
Disable showing generic models	No = the injector will use generic Asobo models if a matching model or suitable fallback model cannot be found Yes = the injector will not use generic models (Note: an aircraft without a model/livery will not be injected)	No	Yes/No	nogenerics
Just Flight FS Traffic Model Priority	Yes = Just Flight FS Traffic models/liveries will be prioritized over FSLTL models/liveries during matching No = Just Flight FS Traffic models/liveries will be used as fallback to FSLTL models/liveries	No	Yes/No	fstraffic
Force approach altitude	Yes = AI aircraft with an altitude higher than 6000ft AGL when calling for approach will be lowered to 6000ft AGL in an attempt to reduce AI go-arounds for aircraft approaching the airport too high. No = FSLTL injector will take no action on AI aircraft at high altitude on approach. (NOTE: This option can only be enabled via manual modification of the injector config file. See the “Changing FSLTL Options Manually” section of our User Guide on the website for more info)	No	Yes/No	forceappalt
Silent injector launch	Yes = Injector will not prompt the user to change settings on launch. No = Injector will prompt the user after displaying the current settings on launch. (NOTE: This option can only be enabled via manual modification of the injector config file. See the “Changing FSLTL Options Manually” section of our User Guide on the website for more info)	No	Yes/No	silent

 

Changing FSLTL Options Manually

To update the options of FSLTL manually, browse the injector configuration file and make your alterations:

• The FSLTL Traffic Injector is located here: %APPDATA%\fsltl-trafic-injector
• Right-click on fsltl-trafficinjector-config.json and open in a text editor such as Notepad, Notepad++, or VS Code.
• Enter the values you wish to change and save the file.

To remove the prompt for changing injector options when the injector is launching, add the following line to the config file mentioned above:

• "silent":"yes"

In-Sim Running Control Options

While the injector is running, you can control a couple of aspects of its behaviour by using the inbuilt toolbar:

Reset Traffic Injection: Removes all existing aircraft and starts injecting again from scratch

Remove Nearby Traffic: Removes traffic that is active around you in an approx 5km radius - useful if aircraft are stuck in front of you on taxi or slow aircraft on final blocking your way!

The sliders allow you to update the injector settings (and have the new values written to the config file) in real-time. It can take a small amount of time until they fully update in the sim as aircraft are removed or added.

The Historic Parked setting is an exception to full real-time updates, existing parked aircraft won't be removed when you change this setting but new airports you come across will use the new setting.

Web API calls:

The injector exposes some rest API calls that allow you to trigger some of the functions of the toolbar from an external program or device.

• Reset traffic injection: http://localhost:42888/reset
• Cull nearby traffic: http://localhost:42888/nearcull
• Kill the injector process: http://localhost:42888/kill

 

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Scope of Injector Input

• The injector reads real-time data of aircraft location/type/departure/destination. NOTE: there is around a 30-second delay in this data.
• You will get a lot more traffic than Asobo live traffic, just be mindful that this may affect performance. However, so far performance does appear good with the latest native models.
• Flights are point-to-point when not using the FlightPlannerDB option
  • Example result: Origin airport to destination airport, linked to MSFS ATC so you will hear them communicate with ATC. ATC will control the take-off and landing of each flight.
• We use SimConnect from Asobo which is still being improved. There are known issues with the API, and you might see crazy flight behaviour from some aircraft on occasion.
• Once inserted into the sim, the injector no longer controls the movement of the aircraft - this is purely handled by MSFS. This is why ATC, TCAS, and other components know all details about aircraft.
• Aircraft are actively removed that move out of range (around 200km) from the user's plane.
• Injector removes aircraft that go around due to MSFS bug that they will then continue to circle forever. They are not removed immediately but after around 60 seconds when some distance away from the airport (to prevent immersion breaking of vanishing aircraft). They will then typically be parked at the destination airport a short time later assuming parking is available.
• If enabled in settings the injector does insert static aircraft at airports based on real-world data collected over several months. The insertion is based on the percentage chance of seeing a livery/model combination at the real airport.
• FSLTL injector tries to keep things moving at airports by culling aircraft that get stuck while taxing, we do this more aggressively than the default Asobo time frame.