Popular Science Monthly 



299 



brace and wood wedges, Fig. 9. Through 

 a hole in the keel, Fig. 5, a 3/16-in. pipe 

 is led from the top of the tank to a brass 

 nozzle. The bubble-way, Fig. 10, is then 

 fastened in place and the strips D, Fig. 11, 

 for the tank wires, are fixed to the bottom. 

 At this point the tank may be wired or 

 strapped in, Fig. 12, and the exhaust pipe 

 soldered in the keel. If desired, a pre- 

 liminary test may be made for adjusting 

 the speed of the boat. 



If these trials are satisfactory, the steer- 

 ing gear and rudder are put in. A hole £, 

 Fig. 13, is punched through the bubble-way 



the edges of which are turned up with a 

 file. The hood or turtle deck, containing a 

 hatchway to make the steering accessible, 

 is roughly cut out. Beginning amidships, 

 the hood is bent over the tank and soldered 

 along the sides, Fig. 22, the tin being 

 trimmed down to fit the hull. The steering 

 wheel is made from a circle or wire soldered 

 to three wire spokes which in turn are 

 fastened to a tin sleeve, Fig. 23. This slips 

 into the steering column. 



A gun deck may be added, Fig. 24, and 

 a turned wood or metal gun mounted on 

 it, Fig. 25. A metal clip, Fig. 26, is soldered 



TUBE FOR RUDDER POST 



cBf 



— ^1 



FI&.25 HOOD 



PATTERN FOR GUN 



Patterns for making the hull of a boat that represents a submarine chaser, the parts being designed 

 so that a storage tank is placed in the fore part under a turtle deck for supplying the air pressure 



and hull to take the rudder post, Fig. 14, 

 made of heavy wire. This post, to prevent 

 leaking, works in a tube, Fig. 15. With 

 the tube soldered in, the rudder, Fig. 16, 

 may be fastened to its post. The steering 

 column, Fig. 17, is made and soldered to 

 the side of the air cylinder and connected 

 with the rudder post by a wire rod, Fig. 18. 

 The boat is now ready for the super- 

 structure or casing. First the face plate, 

 Fig. 19, with holes for the steering column, 

 air-valve, and rudder-rod, is fitted in, Fig. 

 20; then the main and after decks, Fig. 21, 



to the afterdeck to take a flag. With a coat 

 of enamel the chaser is complete. 



In general it is better to make cardboard 

 patterns of the hull and superstructure 

 parts before attempting to cut out the tin. 

 It is well to see that the rod connecting 

 the steering column and rudder also works 

 freely before soldering it to the deck. The 

 several dimensions given are merely sug- 

 gestive. The casing should be fitted to the 

 hull; for your tank, steering gear or some 

 minor detail may differ a bit from the 

 specifications given in the illustrations. 



