These results were then compared to the CFD results of previous experimental results. In order for this data to be trusted enough to invest the time and money into wind tunnel testing the CFD research needed validation. After the airfoil that would be used in the first design of the recreational glider was selected the airfoil performance was tested in Computational Fluid Dynamics (CFD). At the same time this airfoil must allow for the most stable flight while maintaining the appropriate altitude in order to take advantage of the enhanced aerodynamic characteristics present in ground effect flight. One of the major design aspects in designing the recreational glider is selecting an airfoil which will provide adequate lift in order to keep the craft airborne. The recreational glider could be used at these ski resorts year round and help solve revenue issues for ski resorts during the off season and provide a new recreational sport. An incline such as this can be found at numerous ski resorts all over the world. The considered force that would be used to propel this recreational glider would be the force of gravity pulling the craft down an incline. This recreational glider would have no internal power supply and only rely on the outside acting force. It is well known in the art that when the airfoil is present in ground effect the lift force is increased and the drag force is reduced on the lifting surfaces, in turn increasing the L/D ratio. Ground effect traditionally occurs when the airfoil is within a chords length of the ground. There has been interest shown in a recreational glider which operates primarily in the flight regime known as ground effect.
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