![]() ![]() Note that Aeromatic allows only one type of engine to be defined per aircraft. Aeromatic will generate plausible configuration files for your aircraft using some simplifying assumptions. Piston, electric and turboprops need rotors or propellers. All turbine engines use the default "direct" thruster. Thrusters can be rotors, propellers, nozzles or direct. You will need at least three files for a complete configuration, an aircraft file containing information on the aircraft's mass properties, propulsion, flight control, aerodynamic properties, etc., an engine file describing the engine(s), and a thruster file. Aeromatic is a online web tool, written in PHP, not a standalone program. The configuration file format produced using this utility is version 2.0, and is incompatable with older formats because of an extensive overhaul of JSBSim's XML code that occured in December of 2004. JSBSim Systems can be used to model items required in the FDM, and non-flight items, such electrics, hydraulics.Īeromatic See Aeromatic for the main article about this subject.Īeromatic can be used to create aircraft configuration files for use with the JSBSim Flight Dynamics Model. This is a very useful facility as you can have any number of systems referenced from the aircraft configuration file. Systems - A JSBSim system can implement any sort of model.There are three turbulence models to chose from. Atmosphere - JSBSim can be set up to use its own atmosphere model, or it can use an externally supplied model.External forces - If the aerodynamic section is too limiting, or you want to simulate glider tow ropes, catapults or other things, you can add forces at arbitrary points.blimps) and rigid airships, can be simulated with this model. Buoyant forces - Lighter than air craft, e.g.In addition, if the aerodynamic force reference point is not coincident to the CoG the forces will create a hidden moment. You can also create Roll, Pitch and Yaw moments. The aerodynamic force is divided into Lift, Drag, and Side. It is entirely up to the vehicle author to use valid formulas. Aerodynamics - JSBSim's aerodyamics are a blank slate.The propeller and rotor thrusters also create turning moments. All engines provide a force along their X axis, and create moments if this force in not applied at the CG. Propulsion - JSBSim models a variety of engine types using different methods.If the contact is not at the CG it also provides a rotating moment. Each bogey or structural contact provides a force on the vehicle when in contact with the ground. Both are modeled as spring and damper systems. You can have structural contacts which are uni-directional or bogeys which act only in a given direction. Ground Reactions - JSBSim has a fairly simple system for ground reactions.Empty mass and inertia are specified, and point masses (which can have a shape and size) and fuel load are added in. Mass Balance - This model uses weight (mass) to provide a force due to gravity and moments of inertia to damp changes in rotational velocity.JSBSim provides several different physics models which work together to calculate the overall vehicle dynamics. ![]()
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