Welcome to YSFlight!

Home                                                                                                      An introduction to the world of YS...

YS Flight Simulation System 2000, or YSFlight for short, is a lightweight computer flight simulator and game developed and frequently updated by Soji Yamakawa. The current version of YSFlight, version 20060828, is little more than 6Mbs, making it one of the smallest fully functioning flight simulators. It has both single and online player modes, along with it's own AI and missions. 

For single player mode, there are multiple ways of flying on YSFlight. You can:

  • Create a new flight, where you may select the plane and scenery of your choice and fly however you choose;
  • Create a new formation flight, where you can have a either a diamond or delta formation of the plane you choose, with you as the leader;
  • Create an aerial combat, where you fight up to 5 computer AI with up to 2 wingmen, all of whose planes you pick;
  • Fly Endurence mode, where you have to survive 900 seconds of rounds of a maximum of 5 AI, with up to 2 wingmen if you want;
  • Fly an Intercept mission, where you must protect your base for 900 seconds against up to 5 AI bombers, with up to 2 wingmen;
  • Fly a Close Air Support mission, where you must help defend your base for 900 seconds against waves of ground AI;

For most of these modes, you may set the flight enviroment, for example: night or day, wind speed and direction, visibility and fog, with/without ground fire, etc. After each flight, YSFlight will have a record of it ready, so that you may go back and evaluate your performance. Unless you choose to save this flight, the record will be deleted once you make another flight, or when you close YS.

In version 20060828, a new feature called Landing Practice was introduced for offline play. It allows you to attempt an approach and landing in a plane of your choice in any of 15 levels of varying difficulty.

Network play is what most players use, and there are some settings for this as well. First of all, unless you have a firewall or some restriction on your internet settings, all persons with YSFlight installed should be able to host their own server. If you do, a number of different settings is open to you. As in single player mode, you will be able to choose night or day mode, visibility and fog, ground fire, etc. However, there are also some new settings which you can customize. 

You may:

  • Choose your username, scenery, start position, and IFF (Identify Friend or Foe);
  • Determine if missiles, guns, bombs, and rockets may be used;
  • Enable or disable the radar gun sight;
  • Enable or disable notification of players taking off or leaving the game; 
  • Determine the distance at which other users can identify each other;
  • Enable or disable the Third Airplane View (viewing other players and their locations);  
  • Determine the radar altitude limit; 
  • Enable or disable Mid-air collision and Black out;

All your settings will apply to anyone who visits and flies on your server. 

If you are joining someone else's server, you will have to acquire their IP (Internet Protocol) Address. This is usually available either from the person who's hosting the server, or through an online server list hosted on some fansites. 

A common occurence during online play is "lag", where the host's, or your own internet connection becomes overwhelmed and the data transfer is disrupted, resulting in other players seeming to zoom across the sky. This is not a glitch in YSFlight, it is actually a common occurance among many online multi-player games; because the game is hosted by individuals and not servers, each person's Internet bandwith determines how many people may fly on their server without lag. Therefore, if you plan to regularly host a server for 5 or more people, make sure you have at least a DSL connection.