SquawkGear

SquawkGear allows you to fly FlightGear on VATSIM, using a couple of old VATSIM clients, SquawkBox 747 and Advanced Voice Client.

Download SquawkGear from http://squawkgear.wordpress.com

What is VATSIM?

The Virtual Air Traffic Simulation network. "VATSIM is an online community where people can learn and, at the same time, enjoy the pastimes of flight simulation and air traffic control simulation all while making new friends from all over the world." http://www.vatsim.net/vatsim/

History

   Curt thinks it worth pushing towards VATSIM connectivity
   "a bridge... acts as a FG multiplayer server..." - Curt
   http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg20971.html

   "FG users stand to benefit" - Curt
   http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg12538.html

   Similar concept in 2006 (XPlane - FG)
   http://www.mail-archive.com/flightgear-devel@lists.sourceforge.net/msg03730.html
   the difference is that SquawkGear interfaces with SB747, not XSB

Tips

There is an undocumented dot command in SB747 that sets the transponder mode:

• .xpdr standby: force squawk-standby, regardless of the code that is set
• .xpdr on: force squawk-mode C (except when code is set as 0000)
• .xpdr auto: squawk-standby when airspeed is below 120 knots, regardless of the code that is set, and mode C when above 120 knots. This feature is meant to reduce ATC's radarscope clutter.

http://www.flightgear.org/forums/viewtopic.php?f=6&t=8816

References

SquawkBox747 by hoppie: http://hoppie.nl/sb747

The 'Broker' referred to by hoppie is the interface that SquawkGear emulates. The API is documented here: http://www.hoppie.nl/broker/downloads/747brok.html

SquawkGear design (from FG forums): http://flightgear.org/forums/viewtopic.php?f=6&t=533&start=60#p66399

Concerning multiplayer (visualisation of network air traffic): http://forums.vatsim.net/viewtopic.php?f=8&t=47884

Concerning the FSD protocol: Download the FSD server source code (for testing a new client): http://flightsim.apollo3.com/files/fs-files-2.html (grab fsd1110.tar.gz)

Concerning the NDA: http://forums.vatsim.net/viewtopic.php?p=350103#p350103 and http://forums.vatsim.net/viewtopic.php?p=350127#p350127

What some people may not realize is that "FSD" predates VATSIM. VATSIM did not create, nor does it "own" the basic FSD design or protocol. VATSIM's FSD is slightly customized, but anyone can develop a pilot client that speaks the basic FSD language without signing VATSIM's NDA. You'll just need to do the NDA before your pilot client can be used on VATSIM. http://forums.vatsim.net/viewtopic.php?p=350127#p350127

X-IvAp is a GPL'd IVAO client for X-Plane.

VAS Project is a GPL'd generic FMS for MSFS, X-Plane and (future) FlightGear.