simulation trial software / shareware for linux

Silent Wings Simulator game is a highly realistic flight simulator, designed to give high training value for soaring pilots as well as great fun for everyone interested in flight simulation.

The dynamic behavior is based on accurate models from computational aerodynamics, and new techniques for terrain modeling support sceneries of virtually unlimited size and detail.

Learn how to keep control during extreme maneuvers or climb the thermals into the fully volumetric cumulus clouds. Experience the excitement of low altitude hang-flying along spectacular mountain ridges, or simply load a GPS log to replay your own or your fellow pilot’s real life flight.

Aerodynamics

The aerodynamics in the simulator is governed by true physical principles in that the force field acting on the glider is computed from local air flow over the wing profiles as well as position and movement of the control surfaces (elevator, aileron, rudder). The force field is represented by a multitude of local force vectors giving rise to correct behavior, even in “asymmetric situations” like for example side-slip, stall, aero towing and entrance into thermals.

Sceneries

The sceneries in Silent Wings are based on a breakthrough in level-of-detail (LOD) technology that integrates triangulated topographic models, terrain textures, linear features and physical objects in a unified framework geared towards real time visualization. This technology scales almost perfectly with data sizes and allows in principle any resolution for real time rendering.

Weather

The weather model is constructed through realistic simulation of the physical systems for thermals and wind layers. Thermals are based on ground heat capacity models deduced from spectral analysis of certain satellite images. With this as a basis the complete thermal cycle, including rise of warm air, build-up of cumulus clouds, inflow of cool air, and evaporation of the cumulus clouds, is simulated to give high visual and physical realism.

In fact, the user can judge ground, wind and cloud characteristics in the same way as he does during real physical soaring, and find that the atmospheric properties behave as he would expect.

Aircraft

Silent Wings contains 4 flyable aircraft ranging from the sturdy G-103 Twin II trainer to the open class Antares self-launcher. All aircraft have animated moving parts and fully functional 3D cockpits. The wings are flexing naturally in respons to the aerodynamic situation.

The current library of aircraft is planned to be extended, not only with sailplanes, but also other types of flying vehichles.

X-Plane project is the worlds most comprehensive, 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 planets 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, wind shear, turbulence, 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 worlds 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-Planes accuracy (in flight model), scope (in aircraft and terrain coverage), versatility (in aircraft type and weather conditions), add-on programs (in aircraft and scenery editors), user-customizability, downloadable aircraft, and downloadable scenery makes it the ULTIMATE flight simulation experience for Macintosh AND Windows platforms.
X-Planes flight model can handle flying wings and fly-by-wire systems, as needed for a B-2 simulation.
How it Works:
1: Element Break-Down
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.
2: Velocity Determination
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.
3: Coefficient Determination
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.
4: Force Build-Up
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.
5: Get Back to Work
Go back to step 2 and do the whole thing over again at least 15 times per second. Arent computers great?
Version restrictions:
- If you do NOT have an X-Plane 8.00 DVD, these downloads act as a demo... they will stop the joystick after 6 minutes.

Cinderella project can do geometry on the computer, and it is designed to be both mathematically robust and easy to use.

The new release Cinderella.2 is a major step forward and has many new features and enhancements, for example physics simulations and a built-in scripting language.

You can run Cinderella on Windows, MacOS, Linux, and many other Unix variants, because it is written in Java. And since Java is built into many browsers, such as Firefox, Internet Explorer, and Safari, you and others can use your constructions across the Internet. Communicating geometry is easy with Cinderella.

The critically acclaimed blockbuster strategy-simulation hit "Railroad Tycoon II" along with "Railroad Tycoon II: The Second Century Expansion Pack" from developer PopTop Software and publisher Gathering of Developers is now available for Linux!

These real-time strategy simulation games place gamers in a world of big business, expansionism and engineering in which all aspects of the railroad industry can be controlled. Named Strategy Game of the Year by Computer Games Strategy Plus and Imagine Games Network, Railroad Tycoon II captures the authentic look and feel of the fabled late-1800s railways and focuses on industries such as coal, steel and textiles.

Railroad Tycoon II has over 34 types of cargo and 50 train engines, and also features sophisticated economic system and simulated stock market. Railroad Tycoon II: The Second Century focuses on the post-industrial years of the 1930s through 2030.

In The Second Century, gamers encounter world catastrophes such as World War II, the Cold war and global warming, and must solve modern problems such as the increasing demand for mass transportation in major cities.

Railroad Tycoon II is the first game developed exclusively for 1024 x 768 resolution computer screens in either 16-bit or 8-bit color. It supports multi-play over LAN and the Internet.

Clustertech Parallel Environment (CPE) is a C++ software platform which facilitates the development, deployment and execution of parallel applications, unifying and greatly simplifying the process.
The project provides optimized domain specific libraries for Monte Carlo (MC) simulation and for the solution of partial differential equations using the finite difference (FD) method, which greatly reduce the development time of parallel codes. Porting of existing serial code to parallel code is also possible under CPE.
CPE allows users to launch a parallel application with high security and transparency from a workstation through LAN or over the Internet using its ParaConnect technology. CPE has also integrated its remote execution capability with Microsoft Excel. Without any additional coding, parallel objects can be controlled by the worksheets through the provided graphical user interfaces.
Version restrictions:
- 90 days evaluation

SoC GDS project is a System-on-Chip Graphic Display Streamer.
Main features:
- Load multiple GDSII libraries with no size limits,
- Load gzipped GDSII libraries,
- Use full ruler and gridding functions,
- Display layout with unrestricted zoom functions,
- Configure layer display attributes,
- Use restricted hierarchy navigation,
- Load Cadence techfiles.
SoC GDS View is the entry-level option providing optimized GDSII display capabilities including color and pattern configuration file compatibility with Cadence for drop-in replacement or complementing in design flows.
SoC GDS Multi Frame extends the speed and power of SoC GDS View with advanced hierarchical navigation, input format support complemented with OpenAccess and LEF, as well as (VC)LEF generation. Verification of layouts is accelerated through hierarchical graphic cell comparison and hierarchical display of nets annotated by SoC GDS Contrast.
SoC GDS MultiFrame slashes load-times and delivers unmatched verification and validation technology.
SoC GDS Integrator enables socket creation and verification for system-level integration of ViCs (Virtual Components) as defined by VSIA (Virtual Socket Interface Alliance). Delivery of layouts is accelerated through LVS socket creation improvements, hierarchical geometrical cell comparison and a powerful interpreted scripting language for repetitive processing.
The new Virtual Cut feature allows to extract just a part of a layout for verification while totally preserving data confidentiality of the rest of the SoC.
SoC GDS Integrator provides full OpenAccess DataBases support (reading and writing).
SoC GDS Contrast couples SoC GDS Integrator with our patent pending eMicroscope technology to superpose simulation results from extracted netlists directly onto the layout. SoC GDS Contrast shortens your development cycles and reduces post-fabrication failures by enabling Virtual Test & Diagnostic before manufacturing test chips.
Delaying electron microscopy experiments until test chips are actually manufactured is costing you money right now. SoC GDS contrast is going to shorten your development cycles and reduce post-fab failures.
Enhancements:
- The layer configuration window has been enhanced to show the layer and data type numbers in the loaded map table, as well as unmapped layers.
- An abstract versus layout comparator has been implemented that allows automatically comparing all macros in a LEF with the corresponding GDSII cell, based on comparison of obstruction and port geometries.
- SoC GDS is now also available under Red Hat Enterprise Linux 4 in 64-bit mode.