Another way of building up a reel is shown in Fig. 205. A square block has fans nailed or screwed to each side. The ends of the fans are shaped out to receive the kite line. The end of the square center piece can be rounded so as to pass thru a round hole of the framework, or a hole can be bored thru the square piece and a pipe or rod inserted as with the others. For heavy work where large string pulling kites are used, geared reels are practical. Fig. 206 shows a picture of a boy and his reel rigged up with a chain drive, utilizing parts of a bicycle. This was devised for speed, but it needs flanges at the ends of the drum. If one wished to put time enough on a reel, he could rig one up out of parts of a bicycle that could be manipulated by the feet. A coaster brake would let out the string and the winding in could be made as swift as any kite would stand. The wheel used for the drum portion would need quite a little modification to prevent the string from jumping off. As the usual frame would not admit of any widening, some additional framework would also be necessary to make it stable enough. If one is going to do much kite flying, it pays to take time to make a good reel, not the last one described necessarily, as that is more for speed, and is not as convenient as a number of others, but a good simple reel is a great satisfaction. [Illustration: FIG. 206.] CHAPTER XIII. AEROPLANE MODELS. =Aeroplane Models= are small sized aeroplanes. They may be divided into four classes: A. Small models of large machines, made for the purposes of construction. B. Small models of large machines made for the purpose of flying as kites. C. Gliders. D. Self-propelling models. It will be seen at a glance that this chapter should be expanded into a book by itself. Mr. Collins has written an excellent book, “The Second Book of Model Aeroplanes”, on the subject, and I hope the readers of this book will look it up, as it will be worth while. In dealing with the subject in this chapter we can not go into it very deeply and not many plans can be given, but we will try to touch here and there some of the important features of construction.