[Illustration: FIG. 126.--Paper glider: Model "A."]
[Illustration: FIG. 127.--How to launch Model "A."]
Model "A."--Double a piece of paper 8 inches long and 2-1/2 inches wide,
and cut out, through both folds, the shape shown in Fig. 126. Flatten the
piece and fold the "head" inwards four times on the side away from the
direction in which the paper was folded before being cut out. Flatten the
folds and fix to the centre a little clip formed by doubling a piece of
thin metal 3/16 by 1/2 inch. Make certain that the wings are quite flat,
and then, holding the glider between thumb and first finger, as shown in
Fig. 127, push it off gently. If the balance is right, it will fly quite a
long way with an undulating motion. If too heavy in front, it will dive; if
too light, it will rise suddenly and slip backwards to the ground. The clip
or the amount of paper in the head must be modified accordingly. This type
is extraordinarily efficient if the dimensions, weighting, and shape are
correct, and one of the easiest possible to make.
Model "B."--The next model (Fig. 128), suggesting by its shape the
Langley steam-driven aeroplane, has two sets of wings tandem.
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