Carl H. Clark

The Turbine described in the January number will serve very nicely to propel the steamer. Its position in the boat should be about on section No. 3. A small seating or foundation should be built for it to rest upon. To hold it in position small brass angle lugs are used. These are made by bending a strip of brass at a right angle and drilling a 1/8" hole in either leg. One of these may be slipped over each of the two lower bolts before inserting them, and another is put on under the nut on the Qther end. The other four holes may then be used to fasten the turbine in place.

The shaft hole should be bored 1/4" diameter and about 1 2/8" above the bottom of the keel. It runs horizontally and the seating is built up until the driving shaft is in the same line as the hole. For the shaft, a piece of 3-16" steel rod is used, and is connected to the turbine shaft by a sleeve coupling. The after end of the shaft is filed down square for a length of about 5/8". The last J" is again filed round, and a thread cut, which allows the propeller to put on the square part and a nut to be screwed up against it to keep it in place.

Some sort of stuffing box must be provided at the stern to prevent water running in around the shaft; all that is necessary, being an annular spacefilled only with packing and held in place. The propeller should be cast and filed up bright. It should be about 2 1/2" in diameter. The shape and proportions can best be gotten by seeing either a large propeller or some picture of one. The hole in the hub is worked out square to fit end of the shaft and a nut provided to hold it in place. The shaft is inserted from the inside and the propeller is put on. Connection is then made with the turbine. If necessary a bearing may be provided at about the middle of the length of the shaft to prevent its sagging. The exhaust pipe is 1/2" diameter and is let up into the stack. The steam pipe from the boiler'will be described in connection with the boiler in the next issue.