JoinFS is a free cross-platform multiplayer client for flight simulators.
- Smooth jitter-free movement of aircraft.
- A minimal and clean user interface.
- Typically uses less than 1% of CPU time.
- Uses less than 20Mb system memory.
- Brings together pilots from different simulators: FSX:Steam, Prepar3D, FSX (boxed).
- Hostless low-latency peer-to-peer network topology.
- Shared cockpit, unlimited passengers and multi-role cockpit.
- Record and save multiple aircraft to a file and play back recordings live over the network.
- Simple model matching allows you to substitute any aircraft model instantly while connected.
- Decentralized hub mode allows anyone to run a publicly listed hub. No central servers.
- Bookmarks make it easy to save your regular connections.
Small And Efficient Client
JoinFS is designed to be a thin utility that works between the simulator and the network.
Low-Latency Peer To Peer Topology With Dynamic Rerouting
JoinFS can monitor and detect any connectivity problems and will automatically reroute network data in order to maintain the integrity of the session and consequently bypasses issues with NAT home routers.
Decentralized Public Server Network
In hub mode the server details are propagated automatically across the client network. There is no central server.
- Pilots may join a session by connecting to any other pilot in that session.
- When the original creator of the session leaves, the session continues as normal.
- Animations are transmitted over the network; landing gear, elevator, ailerons, rudder, propeller, canopy, lights and smoke.
- Overdub feature allows you to iteratively build your own formation flight or airshow with mixed aircraft.
- Groups of pilots can be present on VATSIM or IVAO at the same time as JoinFS.
On The Horizon
- Version 1.3.x. Post-flight formation analysis tool.
- Version 2.0.x. Formation drones. AI aircraft that can be added to a formation flight. Assign a lead aircraft or station for each drone.
Record, Play and Overdub
JoinFS includes its own flight recorder. This enables you to record your aircraft along with other pilots in the JoinFS network. When you play back a recording the aircraft are also broadcast over the network so that all pilots can see your recording. This allows you to pre-record a lead aircraft which everyone in the session can then formate on. The overdub feature enables you to overlay new flights onto the recording which means you can iteratively build your own unlimited formation.
- Windows 10 / 8.1 / 8.0 / 7 / XP, Linux (Wine).
- .NET Framework 3.5.
- SimConnect 10.0.61259.0. This already comes with FSX (Boxed). FSX:Steam users may need to install the legacy version from (FSX)\SDK\Core Utilities Kit\SimConnect SDK\LegacyInterfaces\FSX-XPACK\SimConnect.msi
- If you wish to create a session, or allow other pilots to join, you may need to enable Port Forwarding for UDP-only 6112 on your router. See your router manual for instructions.
- Aircraft may appear to stutter at very high frame rates. It is recommended that you limit your frame rate to around 35 for smooth movement. The cause of this is beyond the control of JoinFS.
Any suggestions or queries about JoinFS then please use the support forum
Special thanks to CIX VFR Club for teaching me how to fly with confidence, and to the Tiger Moth, Chippies and Warbird teams for initial testing.
Clubs and virtual airlines flying with JoinFS
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JoinFS software written by Peter Memmott. Copyright 2017 Peter Memmott.