at inflation, thus improving the opening
characteristics of the canopy.
BAND, RETAININGA rubber band used
to hold folded suspension lines in a container or
faked lines together.
B A R R E L , A U T O M A T I C P U C H U TE
RIPCORD RELEASEThat part of an
automatic parachute ripcord release that houses
the cartridge and piston or spring and piston.
BARTACKA concentrated series of zig-zag
stitches used to reinforce points of stress. A
bartack should have 28 stitches per half-inch (per
BEESWAXA wax, generally with paraffin,
that is applied cold or melted to thread to prevent
raveling or cloth unknotting and to make thread
easier to sew.
BIAS CONSTRUCTIONA type of canopy
construction in which the canopy cloth is cut and
sewn so that the centerline of each gore runs at
a 45-degree angle to the warp and filling thread
of the canopy cloth.
BINDINGA piece of tape or fabric folded
over and stitched to a raw edge of cloth to prevent
raveling or fraying.
BODKINA large-eyed, blunt needle
instrument for inserting thread, tape, ribbon, or
line through a loop, hem, or channel. Used to feed
suspension lines through canopy radial seams or
to stow suspension line bights in certain parachute
BOLTA package or roll of cloth of varying
widths. Also, a measuring term for 40 yards of
BOTTOM, FALSEApiece of cloth sewn to
the inside of a pack to retain the frame. It also
serves as a base for attaching suspension line
BRAIDA narrow band of interlaced
BREATHINGThe pulsating action of the
parachute canopy when fully inflated.
BUNCHED STITCHINGStitches too close
or more stitches per inch than required.
BURLA knot or lump in thread or cloth.
BURNS, FRICTIONA hard spot on the
suspension line caused by two lines rubbing
together at high speeds, generally off-color and
CAbbreviation for Celsius.
CABLE, ARMING, AUTOMATIC PARA-
CHUTE RIPCORD RELEASEA cable that,
when attached to the ejection seat, lap belt, or
other designated point, arms the automatic
parachute ripcord release at seat/man separation.
CABLE, POWER, AUTOMATIC PARA-
CHUTE RIPCORD RELEASEA cable covered
by a housing, which transmits the force from the
automatic ripcord release assembly to the ripcord
CABLE, RIPCORDA flexible cable joining
the locking pins and ripcord handle.
CANOPYThe main supporting surface of
a parachute that, when opened, reduces the rate
of descent. It is usually made of nylon and
includes a framework of cords, called suspension
lines, from which the load is suspended.
CANOPY, CONICALA canopy con-
structed in the shape of a cone. See also
CANOPY, EXTENDED SKIRTA canopy
that has a flat circular center or disk when spread
out. See also CANOPY.
CANOPY, FLAT CIRCULARA canopy
that has the shape of a flat circle or disk when
spread out. See also CANOPY.
CANOPY, GUIDE SURFACEA mush-
room-shaped canopy in which alternate roof
panels are extended to provide guide surfaces. See
CANOPY, HEM-RIGGEDA canopy that
the suspension lines are attached to the skirt hem
and do not pass over the drag-producing surface;
for example, the 26-foot conical canopy. See also
CANOPY, RIBBONA canopy composed of
concentric cloth ribbons, supported by radial
ribbons and tapes. See also CANOPY.