At the blacksmith shop have a 5/8-in. shaft made, as shown at A,
Fig. 2. It will be necessary to furnish a sketch giving all the
dimensions of the shaft, which should be designed to suit the
dimensions of the boat, taking care that sufficient clearance is
allowed, so that the cranks in revolving will not strike the
operator's knees. If desired, split-wood handles may be placed on
the cranks, to prevent them from rubbing the hands.
The bearings, B, may be made of hardwood, but preferably of iron
pipe filled with melted babbitt. If babbitt is used, either
thoroughly smoke or chalk the shaft or wrap paper around it to
prevent the babbitt sticking. The pieces of pipe may be then
fastened to the boat by means of small pipe straps, such as may be
obtained at any plumber's at a very small cost.
The hubs, C, should be made of wood, drilled to fit the shaft and
mortised out to hold the paddles, D. The covers, E, may be
constructed of thin wood or galvanized iron and should be braced
by triangular boards, as shown in Fig. 1. If galvanized iron is
used, it should be exposed to the weather two or three months
before painting, or the paint will come off, spoiling its
appearance.
Pages:
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249