X-Plane is a really comprehensive and powerful flight simulator, and has the most realistic flight model available for personal computers.

Welcome to the world of props, jets, single- and multi-engine airplanes, as well as gliders, helicopters and VTOLs such as the V-22 Osprey and AV8-B Harrier.

X-Plane comes with subsonic and supersonic flight dynamics, sporting aircraft from the Bell 206 Jet-Ranger helicopter and Cessna 172 light plane to the supersonic Concorde and Mach-3 XB-70 Valkyrie. X-Plane comes with about 40 aircraft spanning the aviation industry (and history), and several hundred more are freely downloadable from the internet.

X-Plane scenery is world-wide, with scenery for the entire planet Earth AND MARS! (thanks to the Mars Orbiting Laser Altimeter, which mapped that planet's elevation) You can land at any of over 18,000 airports, as well as test your mettle on aircraft carriers, helipads on building tops, frigates that pitch and roll in the waves, and oil rigs.

Weather is variable from clear skies and high visibility to thunderstorms with controllable wind, turbulence, wind shear, and microbursts!

Rain, snow and clouds are available for an instrument flying challenge, and thermals are available for the gliders! Real weather conditions can be downloaded from the internet, allowing you to fly in the actual weather that currently exists!

X-Plane also has detailed failure-modeling, with 35 systems that can be failed manually or randomly, when you least expect it! You can fail instruments, engines, flight controls, and landing gear at any moment.

While X-Plane is the world's most COMPREHENSIVE flight sim, your purchase also comes with Plane-Maker (to create your own airplanes) World-Maker (to create your own scenery), and Weather Briefer (to get a weather briefing before the flight if you use real weather conditions downloaded from the net).

X-Plane is also extremely customizable, allowing you to easily create textures, sounds, and instrument panels for your own airplanes that you design or the planes that come with the sim.

X-Plane's accuracy (in flight model), scope (in aircraft and terrain coverage), add-on programs (in aircraft and scenery editors), user-customizability, versatility (in aircraft type and weather conditions), downloadable aircraft, and downloadable scenery makes it the ULTIMATE flight simulation experience for Macintosh AND Windows platforms.

X-Plane's flight model can handle flying wings and fly-by-wire systems, as needed for a B-2 simulation.

Here are some key features of "X-Plane":

· Done only once during initialization, X-Plane breaks the wing(s), horizontal stabilizer, vertical stabilizer(s), and propeller(s) (if equipped) down into a finite number of elements. The number of elements is decided by the user in Plane-Maker. Ten elements per side per wing or stabilizer is the maximum, and studies have shown that this provides roll rates and accelerations that are very close to the values that would be found with a much larger number of elements.
· This is done twice per cycle. The aircraft linear and angular velocities, along with the longitudinal, lateral, and vertical arms of each element are considered to find the velocity vector of each element. Downwash, propwash, and induced angle of attack from lift-augmentation devices are all considered when finding the velocity vector of each element.
· Propwash is found by looking at the area of each propeller disk, and the thrust of each propeller. Using local air density, X-Plane determines the propwash required for momentum to be conserved.
· Downwash is found by looking at the aspect ratio, taper ratio, and sweep of the wing, and the horizontal and vertical distance of the "washed surface" (normally the horizontal stabilizer) from the "washing surface" (normally the wing), and then going to an empirical look-up table to get the degrees of downwash generated per coefficient of lift.
· The airfoil data entered in Part-Maker is 2-dimensional, so X-Plane applies finite wing lift-slope reduction, finite-wing CLmax reduction, finite-wing induced drag, and finite-wing moment reduction appropriate to the aspect ratio, taper ratio, and sweep of the wing, horizontal stabilizer, vertical stabilizer, or propeller blade in question. Compressible flow effects are considered using Prandtl-Glauert, but transonic effects are not simulated other than an empirical mach-divergent drag increase. In supersonic flight, the airfoil is considered to be a diamond shape with the appropriate thickness ratio... pressures behind the shock waves are found on each of the plates in the diamond-shaped airfoil and summed to give the total pressures on the foil element.
· Using the coefficients just determined in step 3, areas determined during step 1, and dynamic pressures (determined separately for each element based on aircraft speed, altitude, temperature, propwash and wing sweep), the forces are found and summed for the entire aircraft. Forces are then divided by the aircraft mass for linear accelerations, and moments of inertia for angular accelerations.

Requirements:

· 2 GHz, multi-core CPU (3 GHz, multi-core CPU recommended)
· 2 GB of RAM (4 GB of RAM recommended)
· Video card with 512 MB of on-board, dedicated VRAM (video card with 1 GB of on-board recommended)

Limitations:

· The demo version will stop the joystick after 10 minutes.

What's New in This Release: [ read full changelog ]

· Beta 3 contains a few fixes to bugs introduced earlier in the beta, as well as some experimental stuff.

· DRM: X-Plane 10.04 beta 3 will remember that it has seen a DVD for 24 hours, alleviating the need to keep the DVD in the drive all of the time. Chris will blog about this in more detail later.

· Rendering artifacts: X-Plane 10.04 beta 2 introduced a bug where the internal visibility could become a negative number. This introduced a ton of weird artifacts, including missing pieces of runway and broken lighting. Beta 3 fixes this. Please read the following carefully.
· If you reported a rendering artifact bug for X-Plane 10.04 beta 2 _and_ if that bug was _new_ to X-Plane 10.04 beta 2 _and_ if the bug is not fixed in beta 3, please re-report the bug.
· Please do _not_ re-report rendering artifact bugs that were also in beta 1. We already have those bugs in our database; we only want to see how many of the new beta 2 artifacts were fixed by this single change.

Other Fixes:
· Beta 2 was ...