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flaps over the container cones, and to
pull the cones through the grommets.
They are also used to pull the suspension
lines into place in some types of
containers.
Q
QUALITY CONTROL—A
method of describing the inspection
and test procedures necessary to
ensure that each article produced conforms
to the type design and is in a
condition for safe operation.
R
RADIAL SEAM—A seam joining
two gores which extends in a
radial direction from the vent to the
skirt hem.
RAM-AIR PARACHUTE—
Generally, a rectangular, double surface
canopy with airfoil shaped ribs
inflated by the air flowing into the
front openings to produce an airfoil
shape.
RATE OF DESCENT—The
vertical velocity, in feet per second,
of a fully-opened parachute.
RATING—A statement that, as a
part of a certificate, sets forth special
conditions, privileges, or limitations.
RAVEL (UNRAVEL)—To separate,
untwist, or unwind, leaving a
frayed or ragged edge. “Unravel” is
often used with the same meaning,
although grammatically incorrect.
RAW EDGE—The unfinished
edge of the material; liable to raveling.
REEFING—A temporary restriction
of the skirt of a parachute to a
diameter less than the fully inflated
diameter. Reefing is used to decrease
drag area, and/or to obtain stability.
REINFORCEMENTS—
Commonly strong tape or webbing
used to strengthen parts of the
canopy, container, or harness.
parachute so that it is ready for immediate
use. Parachute rigging also
includes fitting and adjusting the harness.
RIG—To pack. A set of sport parachute
equipment. To assemble a parachute.
RING, V—Used in conjunction
with snaps to fasten the harness
around the wearer. Larger than the
newer triangle ring.
RIPCORD CABLE—A flexible
metal cable 3/32" diameter made of
49 strands of stainless steel wire. The
cable runs from the ripcord grip to the
locking pins. It is housed in a flexible,
protective tube.
RIPCORD HOUSING
CLAMP—A metal clamp located
on the outside of the end flap of back
and seat-type parachutes. The clamp
secures the ripcord cable and power
cable of the actuator.
RIPCORD HOUSING—A
flexible tubing in which the ripcord is
installed for protection and to provide
a free path for the ripcord.
RIPCORD PIN,
LOCKING—A small metal
prong, slightly smaller in diameter
than the ripcord cable and fastened to
it by means of a swage fitting or serving
and solder. One pin is attached to
the end of the cable and the others
(when two or more are used) are set at
intervals on the cable. The spacing of
the pins is dependant on the distance
between the cones on the container
flap. The locking pins pass through
the locking cones of the flaps and thus
serve to lock the container until such
time as the pins are withdrawn.
RIPCORD—A locking device
which secures the pack in a closed
condition and by which the release of
the parachute is effected. It may consist
of a handle, cable, locking pins
and a cable swage.
RIPSTOP NYLON—Nylon
fabric woven in intermittent box form
with additional closely-picked yarns.
RIPSTOP TAPE—Ripstop
nylon fabric with a pressure sensitive
adhesive. Used to repair small tears in
canopies.
RISER—That portion of the suspension
system between the lower
end of a group of suspension lines
and the point of attachment to the
load.
ROLL PACKING — A method
of packing a ram-air parachute
whereby the nose and the tail are
rolled towards the center of the
canopy.
ROUTINE INSPECTION—A
visual inspection of all parts of a
packed parachute which may be
checked without opening the parachute.
S
S.A.E.—Society of Automotive
Engineers.
SADDLE—The part of the harness
positioned under the seat of the
wearer.
SAFETY TIE—The thread used
in sealing a parachute.
SCISSORS—A cutting instrument
with two opposing blades.
SEAL PRESS—A mechanical
press used for compressing lead seals
to seal parachutes in accordance with
14 CFR subsection 65.133.
SEAM RIPPER—A small tool
used for picking or cutting threads in
sewing operations.
SEAM, DIAGONAL—The
diagonal or horizontal seams which
join the section of each gore.
G-10
RELATIVE HUMIDITY—
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Parachute Rigger Handbook(111)
