Fig. 85.
Fig. 86.
Fig. 87.
Now into the bow support fix a loop of stout wire to hold the rubber strands, making it sufficiently large to rest against the sides and so prevent turning. At the stern support adjust the propeller bearings. On the care with which these are adjusted depends largely the success of the model. Take a piece of wire (1/16-inch brass is best) and bend it as in Fig. 88, introducing a hard smooth glass bead. This "bead" runs more freely against the metal, and so facilitates the working. Now stretch the elastic between the two loops, arranging it so that there are six or eight strands. To work the model, turn the propeller round and round till the strands of elastic are very tightly twisted, place on the surface of the water, and then release the propeller. Fig. 83 shows the completed model.
Fig. 88.