A rectangular base is suggested, with a central stick. The planes, which may be either flat or cambered, are attached to the central stick and slightly raised by inserting strips of wood above the outer edges of the motor base. In this way, it is possible to fix them rigidly. Wire braces running from the outer ends to the rear of the motor base will add to its strength. The angle of the wings to the motor base may be altered to suit conditions. A plane of high aspect ratio works best in this position. THE CANNING MODEL. There is much to be said for the model with propellers placed near the centers of gravity and pressure. Many authorities believe that the successful aeroplane of the future will carry propellers somewhere near the center of the motor base. Since the thrust is exerted near the point where the aeroplane balances, it is argued that its stability is greatly increased, while with the propellers far removed, either to the front or rear, the torque gains a leverage from its position which it is difficult to control. The main difficulty with this arrangement all along for rubber-strand motors has been that the length of the motor must be cut down to about half, and their efficiency reduced. In the Canning model, this difficulty has been overcome, and a motor extending the entire length of the motor base is hitched up to twin propellers placed near the center of gravity. A powerful motor extends along the center of the motor base, attached to a gear wheel at the forward end. This wheel turns two smaller gears at either side. In this way, a motor running the entire length of the frame may be used with an increased number of turns. A third gear wheel should be introduced to make the propellers turn in opposite directions. THE FLEMMING WILLIAMS MODEL. An immense amount of curiosity has been aroused regarding the famous Flemming Williams model. This machine has completely outdistanced all rivals, and set a new and amazing distance record. Its builder frequently gets flights of eighteen hundred feet with his model, and has made the astonishing record, under favorable conditions, of one-half a mile. In order to study this model at first hand, the writer has imported one of the machines, built by Ding, Sayles & Company, one of the leading model builders of England. The distance qualities of this model will be recognized at a glance. It is a single sticker, extremely light in all its members, combining an extraordinarily long motor base with well-adjusted plane surfaces. The arrangement of the wings is original. The main stability plane is set forward in front of the center of pressure. The rear plane is formed by filling in the space between the rear stick and the braces, thus saving the weight of the frame usually carried in this position. The model is driven by two seven and a half inch propellers of very high pitch. The model is without skids and is launched from the hand.