Kitecraft : $b and kite tournaments — John Stuart Mill — John Shaqi
Kitecraft : $b and kite tournaments
John Stuart Mill · en
=The veneer propeller= must be steamed and pressed. This is by far the
most difficult to make. The 1/16” hardwood veneer is the best. The
propeller is not reinforced to make up for the extra thickness of the
carved propeller, but is of uniform thickness thruout. The veneer is
first cut to shape in outline and then is steamed and twisted to shape.
Fig. 255 shows a pattern for a propeller blade. The veneer should be
steamed or soaked in hot water until the wood is very pliable and
soft. A form should be ready so as to get both wings with equal twist
from the central portion. I will suggest one, others can be devised.
A clamp is necessary for the center, which may be made as follows:
take a one-inch piece of wood about 1¼” wide and any length. Set it
up edgewise. Make a cut 1/16” deep and one inch long across the upper
edge, Fig. 256, and screw a small piece over top as a clamp. After
thoroly steaming the propeller blade until it is very pliable, insert
it into the clamp at the center and twist from the straight side, one
fan up, the other down. It is not easy to get the two sides just alike,
so I recommend the bending of one side at a time, and when that is dry,
remove, and reverse the ends, being sure to keep the straight edge
to the front, or the same as before. To be accurate, there must be a
guide block to bend to. For a nine-inch propeller, a block like Fig.
257 would be about right. Place guide in position, press blank down to
the oblique surface and secure there until dry. Repeat for the other
end. It will be seen that the guide block and clamp are both secured
to a board for a base; they may be secured to a table or bench-top. A
clamp might be devised also that would hold the propeller in a vertical
position with guide blocks on either side of center so as to bend and
secure both ends at the same time.
[Illustration: FIGS. 255, 256, 257, 258.]
[Illustration: FIG. 259.]
=Another way to bend propellers= is to clamp the center of the blank
in a vertical position, and with two clamps made by sawing into the
ends of two pieces of wood, Fig. 258, a cut wide enough to take the
thickness of the blank, and deep enough for the width, bend one blade
forward and the other back, Fig. 259. The small clamps on the propeller
blades should be placed at equal distances from the center, and should
be given an equal amount of twist. The small clamps on the blades will
not be forced over until they touch the base, so blocks of equal size
should be used as stops in the operation of twisting. The clamps should
be secured in the last position by means of cord to the base until the
propeller is dry.
[Illustration: FIG. 260.]
[Illustration: FIG. 261.]
Still another way to attain the twist in veneer propellers, would be
to have two blocks gouged out to the proper shape, one just fitting
in the other. After the propeller is shaped in outline and steamed,
it is placed between the two blocks, which are in turn clamped firmly
together until propeller is dry.