Aerodynamics No. 192
This unit includes:
- a sheet of balsa wood, 0.05 inches (1.27 mm) thick, with deep cuts
This sheet contained the wings and wing tips shown at left.
The original sheet appears to have been 10 x 2.5 x 0.05 inches (254 x
63.5 x 1.27 mm) based on this reconstruction.
- a strip of wood, 2.5 x 0.25 x 0.1875 inches (63.5 x 6.35 x 4.7 mm)
with square-cut ends
Two grooves, each 0.05 inch (1.27 mm) wide by 0.1 inch
(2.5 mm) deep, are cut along the 2.5" dimension in the 0.1875-inch
sides. Although the booklet text implies that these are cut at angles of
30° from perpendicular (so that
when the wings are inserted, they are canted upwards in a "V"), careful
measurement shows that these angles are about 20° (so that the angle
between the grooves is about 140°, consistent with the
figure on page 3 of the booklet). The
bottoms of the grooves are approximately centered on the 0.1875-inch
- two shorter strips of wood, 1.375 x 0.25 x 0.1875 inches (34.9 x
6.35 x 4.7 mm) with bevel-cut ends
The booklet says that these pieces are 1.25 inches in length, but this
is incorrect. The overall length is 1.5 inches, but the bevels reduce
the length of the 0.1875-inch sides to 1.375 inches. These pieces
also have grooves cut in the same way as the 2.5-inch strip (see the
figures on pages 2 and 3 of
- a piece of modelling clay to be used as a nose weight
- a 12-page booklet containing 14
The kit was shipped in an envelope with two sheets of cardboard for
protection. The damage to the wings (evident in the photos) probably
occurred after they had been detached from the original balsa sheet.
The ruler in the photo provides a size reference; it is not part of
Balsa with a thickness of 0.05" (1.27 mm), as used in this unit, can be
obtained from a few suppliers, including
Solarbo USA and
Lone Star Balsa.
It is much easier to find 1/16" (1.6 mm) balsa.