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P-150: Ekranoplan: Mathematics and Preliminary Wing Planforms

by on Aug.24, 2014, under Art and Designs, Concepts, Inventions

I have completed the calculations for the wings of the supersonic ekranoplan. I have come up with a series of options, all of which I intend to test in openFOAM.

I have two wing plan forms: Delta, and Trapezoidal delta. I may also creae an Ogival or Compound delta wing.

With each of these two models, I intend to create Double Wedge, Biconvex, and NACA 64(A)-204 airfoils, each with thicknesses of 3,4 and 5%.

I also intend to model both straight and Anhedral (Caret) wings of varying angles. Anhedral wings can boost the ground effect by trapping air in the gaps between the wings.

This should create enough data for testing.

 

I have however discovered one potentially fatal flaw in the supersonic ground effect vehicle concept. THIS page contains a graph which shows the Decrease in the ground effect in relation to the height of the aircraft. It seems that the longer the wingspan, the higher the aircraft that fly in the ground effect. A good ground effect vehicle, then, should have a wingspan that is as long as possible. However, a well-designed supersonic vehicle should be the opposite, it should have short, stubby wings, since these reduce wave drag at very high speed.

It should be possible to get a proof of concept using a compromise between short and long wings, but the solution may not be optimal.

 

P150-Ba

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