| rdfs:comment
| - Because of the power of aerial units, you should seek to gain them as early as possible, thus making this upgrade a priority.
- Aerodynamics is a branch of fluid dynamics concerned with the study of gas flows, first analysed by George Cayley in the 1800s. The solution of an aerodynamic problem normally involves calculating for various properties of the flow, such as velocity, pressure, density, and temperature, as a function of space and time. Understanding the flow pattern makes it possible to calculate or approximate the forces and moments acting on bodies in the flow. This mathematical analysis and empirical approximation form the scientific basis for heavier-than-air flight.
- One of the more common feature requests I've seen is air resistance (behind explosions ). And try as I might, I've never quite been able to find a practical way to simulate it - even with thrusters. Also, while thrusters work great for simulating helicopters and rockets (and blimps and balloons with the AGW), it just doesn't quite cut it for making planes fly realistically. Until now. While messing around with the dual-widget gyro, ace happened to discover a rather unusual phenomenon: Here's a tutorial on how to produce the effect: Here is a tutorial that helped me more
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| abstract
| - Aerodynamics is a branch of fluid dynamics concerned with the study of gas flows, first analysed by George Cayley in the 1800s. The solution of an aerodynamic problem normally involves calculating for various properties of the flow, such as velocity, pressure, density, and temperature, as a function of space and time. Understanding the flow pattern makes it possible to calculate or approximate the forces and moments acting on bodies in the flow. This mathematical analysis and empirical approximation form the scientific basis for heavier-than-air flight. Aerodynamic problems can be classified in a number of ways. The flow environment defines the first classification criterion. External aerodynamics is the study of flow around solid objects of various shapes. Evaluating the lift and drag on an airplane, the shock waves that form in front of the nose of a rocket or the flow of air over a hard drive head are examples of external aerodynamics. Internal aerodynamics is the study of flow through passages in solid objects. For instance, internal aerodynamics encompasses the study of the airflow through a jet engine or through an air conditioning pipe. The ratio of the problem's characteristic flow speed to the speed of sound comprises a second classification of aerodynamic problems. A problem is called subsonic if all the speeds in the problem are less than the speed of sound, transonic if speeds both below and above the speed of sound are present (normally when the characteristic speed is approximately the speed of sound), supersonic when the characteristic flow speed is greater than the speed of sound, and hypersonic when the flow speed is much greater than the speed of sound. Aerodynamicists disagree over the precise definition of hypersonic flow; minimum Mach numbers for hypersonic flow range from 3 to 12. Most aerodynamicists use numbers between 5 and 8. The influence of viscosity in the flow dictates a third classification. Some problems involve only negligible viscous effects on the solution, in which case viscosity can be considered to be nonexistent. The approximations to these problems are called inviscid flows. Flows for which viscosity cannot be neglected are called viscous flows.
- Because of the power of aerial units, you should seek to gain them as early as possible, thus making this upgrade a priority.
- One of the more common feature requests I've seen is air resistance (behind explosions ). And try as I might, I've never quite been able to find a practical way to simulate it - even with thrusters. Also, while thrusters work great for simulating helicopters and rockets (and blimps and balloons with the AGW), it just doesn't quite cut it for making planes fly realistically. Until now. While messing around with the dual-widget gyro, ace happened to discover a rather unusual phenomenon: Like ace said, very exciting. This effect produces a remarkably good simulation of air resistance. It may not vary with the square of velocity, but it's darn close. It gets better. Upon experimentation (seen here), I discovered that this resistance effect actually has an axial bias - it's stronger in one axis than in the other. This REALLY excited me, because this meant that the pieces could produce lift, and when turned on an angle, glide. I found that by setting the rotation limits on the widgets to zero, these axes could be rotated along with whatever they are attached to. By changing the strength of the thrusters, I managed to optimize the axial bias, effectively making a "wing." It wasn't long before I put my wing to use in a cute little biplane: Here's a tutorial on how to produce the effect: Oh, and I should mention, I have pretty much no clue how it works. I have a feeling it involves some kind of glitch with the rotating joints under stress, though. Here is a tutorial that helped me more
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![[RDF Data]](/fct/images/sw-rdf-blue.png)