Fig. 15.—Complete framework of rudder.
The rudder beams are stepped into sockets on the body of the machine so that the rudder is detachable.
A short cross bar 2 feet inches long and 1 1/4 x 3/4 inches in cross section, is fastened between the two centre struts of both planes at a point eight inches forward of the rear beams.
These cross bars carry one of the sockets mentioned above as also do the rear horizontal beams. The cross bar and sockets in the upper plane should be directly over those in the lower plane but in an inverted position.
Fig. 16.—Cross bar.
The construction of the sockets is illustrated in Fig. 17. The smaller one is fastened to the cross bar and is bent out of a strip of 1/16 inch sheet brass 4 1/2 inches long and 3/4 of an inch wide. The larger socket is the same length and thickness but is 1 1/4 inches wide and is fastened to the horizontal beam. Two of each size are required. The ends are rounded and a 3/16 inch hole bored in each so that a 3/16 inch round headed stove bolt may be used to fasten the sockets to the framework.
Fig. 17.—Rudder Sockets, or Clamps.
