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The primary objective of this project is to produce a UAV with a wing span of 108" that uses the (Internal Wing Aircraft) concept.

We just completed writing a program that calculates the Aerodynamic Center for this unusual configuration which has a total of 7 variables for each wing panel.

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Above is a early CFD run on the IWA wing prior to refinement.



Early concept drawing of the IWA to be built by Precision Design.


IWA Technology Corner

The Internal Wing Aircraft (IWA) technology, is a design that generates extraordinary lift and thrust by the action of air moving through a shaped duct. The technology and multiple applications related to aerospace designs are covered under U.S. Patents 4,568,042 and 4,579,300 as well as other current patent pending.

The extraordinary lift and thrust characteristics of the IWA design are a result of the duct, the bottom of which serves as the internal wing, and the coanda, which is the leading surface that extends toward the nose on each side and looks like a wing. As the glider is moving through a flowing medium (air or water), or as that medium is being pushed through the system in powered versions, the air or water comes off the upper trailing edge of the coanda in a downward direction toward the internal wing.


The downward direction of the air or water has two effects on the flow through the system. First, it separates the flow from the top of the duct. This separation is what inhibits the pressure under the top of the duct from decreasing. If the pressure under the top of the duct were allowed to decrease too much then the positive lift generated from the bottom of the duct, the internal wing, would be negated by the negative lift generated by the top of the duct.

Second, the downward direction of the flow off the back of the coanda laminates this air or water to the flow that has come into the system and onto the internal wing from under the coanda. Therefore, the IWA design doubles the mass of the air or water that is flowing over and operating on the internal wing. The lift produced increases exponentially with the mass of the medium operating on the wing. Also, the lamination process combined with the confining effect of the sides of the duct squeezes the flow in much the same fashion as your thumb squeezes the flow of water when you place it over the end of a running garden hose. This squeezing action produces a venturi effect that results in an increase in velocity of the flow through the internal wing system. Lift also increases exponentially with the velocity of the flow through the system. In addition, the increase in velocity produces thrust. We call this thrust producing effect Dynamic Natural Propulsion.

The venturi effect is the same phenomenon utilized by designers of jet engines. So, in essence the IWA system becomes its own engine. The bottom line is the mass of the flow operating on the wing is doubled and the velocity of the flow through the system is dramatically increased. All of this adds up to a design that, amazingly, creates its own lift and thrust.     

The applications for the Internal Wing Aircraft are endless. With a 29.6 pound lift per horsepower (compare to a typical helicopter with a 5 - 12 pound lift per horsepower), the IWA can vertically lift heavy loads and transport great distances. Due to the increased lift generated by the wing design, up to 75% less fuel will be consumed, a great boon to our environment.





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