WE PRESENT here our fifth article on model airplane construction. This little model typifies the principles of design which your editor, Charles H. Grant, has been advocating in his popular series of articles "The Aerodynamic Design of the Model Plane." Freak tests with this model have proved beyond doubt the soundness of Mr. Grant's designing principles. Possibly the most interesting test made with this model, and by far the most important one to the average model airplane builder, was the poor launching test. The model was released with its wings at a ninety-degree angle to the horizontal. While this would spell ruin to the flight of the majority of models, it immediately righted itself and flew perfectly upon being launched. Many other severe tests were given it, both in the method of launching and the weather in which it was flown, but in all cases perfect flights resulted. Its performance and stability are exceptional. Out of some ten flights it averaged, when hand wound, 30 seconds duration covering an average distance of 450 feet. For the beginner who has not yet developed the technique of model plane flying, it will prove especially adaptable. Here is a model guaranteed to be a "sure fire" flyer under all conditions. It will prove a splendid practice model for every beginner, whether he is building his first model, or for the expert wishing to test the aerodynamic designing principles upon which it has been created.