134,
in which A B represents the front piece of the T-shaped rod and x y z a the
cane skid; the portion x y passing on the near side of the vertical part of
the T, and z a on the far side of the same. At E and F thread is bound
right round the rod. Should the nose of the machine strike the ground, the
loop of cane will be driven along the underside of the rod and the shock be
minimized. So adjust matters that the skid slides fairly stiff. Note that
the whole of the cane is on the under side of the top bar of the T.
[Illustration: FIG. 134.--Front skid and attachment to backbone.]
Bearings.--We have still to deal with the propellers and their bearings.
The last, TN and TNl (Fig. 133), are simply two tiny pieces of tin about
half a gramme in weight, bent round the propeller spar HS3 at B and B1.
Take a strip of thin tin 1/4 inch wide and of sufficient length to go
completely round the spar (which is 1/4 by 1/8 inch) and overlap slightly.
Solder the ends together, using a minimum amount of solder. Now bore two
small holes through wood and tin from rear to front, being careful to go
through the centre.
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