In the experiments in building models with very narrow planes, some amazing results have been produced during the past year. The limit in this reduction would seem to have been reached in the model with planes with a ratio of eight separated by a distance equal to ten times their width. The forward part of this amazing model is a modified biplane, and in this respect it resembles a successful model of last season. The two models are reproduced side by side, for the sake of comparison. The economy of weight and resistance is instantly obvious to the most inexperienced eye. The model rises quickly and flies for nearly three hundred feet in a perfectly straight line. The motor base, which has a length equal to six times its width, or eight by forty inches, is constructed of one-quarter inch strips. A light cross piece at the center braces the two sides. The supports for the propeller axles extend out horizontally from the sides. This arrangement makes it possible to mount two ten-inch propellers on an eight-inch base. The front ends of the frame are joined by a semicircular piece of reed which acts as a shock absorber and does away with the weight of the cross piece. The workmanship in every detail of this frame must be exceedingly delicate. The planes have an aspect ratio of eight and measure two inches in depth by sixteen in width. The outer ends of the rear plane are three inches in their fore and aft dimensions, thus making the outer rear edge a slight concave. The front is cut sharply away at an angle of forty-five degrees. The upper plane lies flat upon the motor base. The lower plane is not set directly below it as in the ordinary biplane form, but to the rear, its front edge being on a line with the rear edge of the upper plane, after the manner of the Valkyrie machine. The two planes are separated by a space slightly greater than their width. Two small rudders, elliptical in shape, are carried just behind and below the rear plane. The model is mounted on very delicate skids built of reed, and is inclined at a very slight angle. Six strands of one-eighth-inch rubber are used for each motor. The unusual length of the motor makes it possible to give six hundred turns. THE BURGESS WEBB MODEL. An ingenious method of lightening the front end of the motor base and at the same time reducing the head resistance is employed in the Burgess Webb model. A single stick frame is used with a base equal to one-fourth its length. The cross piece is mortised to the central stick and braced by the diagonal sticks, joining at the main frame. This cross piece is carried out beyond the braces and pierced for the propeller shafts, where two twin propellers are mounted. Fig. C.