AERODYNAMICS OF HOVERCRAFT PDF

It is like gliding on a cushion of air! In fact, that's exactly what you're doing—a hovercraft is a vehicle that glides over a smooth surface on a cushion of air. Because a hovercraft can travel over flat land or water, it is an amphibious vehicle. In this activity, you'll get to build your own mini hovercraft using a CD or DVD, a pop-top lid from a plastic bottle, some glue and a balloon.

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Show full item record. The effect of lift-system airflow on the hull aerodynamics of hovercraft Login. JavaScript is disabled for your browser. Some features of this site may not work without it. The effect of lift-system airflow on the hull aerodynamics of hovercraft Andrews, E.

Date: Abstract: A first generation of commercial amphibious hovercraft has now been operating on a scheduled basis with revenue payloads on relatively-short over-water routes. On some of these routes, open-sea conditions prevail. By and large, the degree of success attained during these operations has been encouraging.

However, certain problem areas have been brought to light, one or the most important being concerned with handling qualities. As in the case of aircraft, the handling qualities of hovercraft depend heavily on stability and control characteristics.

In this case, however, the problem is rather more complex being dependent on aerodynamic, hydrodynamic, and air-cushion effects. There are also important interference effects at the aero-hydro- interface. To understand the overall handling problem, each of these contributory effects must be isolated from the others, so that individual study from a stability and control viewpoint can be attempted.

The task of isolation is difficult. It does not fall within the scope of full-scale testing, neither is it amenable to analysis except possibly in the case of air-cushion effects where good progress has been made using mathematical analysis.

Thus it becomes essential that to study the aerodynamic and hydrodynamic effects, recourse be made to experimental testing. The National Physical Laboratory at Feltham has provided most of the effort in hydrodynamic experimentation, and the Cranfield Institute of Technology formerly known as the College of Aeronautics has complemented this work by undertaking the aerodynamic experimentation.

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It is this proximity to the surface that chiefly distinguishes such craft from aircraft, which derive their lift from aerodynamic forces created by movement through the air. Two main classes of air-cushion vehicles exist: those that generate their own pressure differential irrespective of forward speed; and those, more closely related to true aircraft, that require forward speed before the pressure differential can be generated. Neither Thornycroft nor other inventors in following decades succeeded in solving the cushion-containment problem. In the meantime aviation developed, and pilots early discovered that when they were flying very close to land or water surface their aircraft developed greater lift than in free air.

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The effect of list-system airflow on the hull aerodynamics of hovercraft

Show full item record. The effect of lift-system airflow on the hull aerodynamics of hovercraft Login. JavaScript is disabled for your browser. Some features of this site may not work without it. The effect of lift-system airflow on the hull aerodynamics of hovercraft Andrews, E. Date: Abstract: A first generation of commercial amphibious hovercraft has now been operating on a scheduled basis with revenue payloads on relatively-short over-water routes.

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The effect of lift-system airflow on the hull aerodynamics of hovercraft

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