Rib, crossbrace:   A rib or partial rib installed at an angle other than a 90 °  angle to the upper and  lower surfaces of a canopy.  Rib, loadbearing: A rib to which suspension lines are attached, installed at a 90 °  angle to the  upper and lower surfaces of a canopy.  Rib, non-loadbearing: A rib without attached suspension lines, installed at a 90 °  angle to the  upper and lower surfaces of a canopy.  Rib, stabilizer:  A stabilizer-end rib assembly with line attachments along the lower edge. Crown: A suspension line length pattern in which all “A” lines are the same length across the  span of the canopy, all “B” lines are the same length across the span of the canopy, and similarly  all “C” and “D” lines, etc. Flat: A suspension line length pattern in which the lines in the center of the canopy are shorter  than the lines farther outboard. In flight, the center part of the airfoil is flatter and creates more  vertical lift than a crown-rigged canopy, which generates lift along the radius of the spanwise arc.  Rigging, Setting,  Deployment: The position of the trailing edge when the control lines are pulled down to their  deployment position.  Full-Flight: The position of the trailing edge when the control lines are fully extended. Slider:  A parachute reefing device usually consisting of a rectangular section of canopy cloth reinforced  on the edges with lightweight webbing or tape, and with a large grommet or D-ring installed at each  corner. Sliders may have fabric removed from the rectangular section or may have fabric edge extensions  installed to change opening characteristics. Slider variations include:  Slider Bumper: A small device, typically made from vinyl/silicon tubing, Type-4 tape, or Type-12  webbing, installed at the lower end of the suspension lines to prevent damage to the slider grommets  caused by the slider contacting the connector links.  GLYPH<127> Domed, with a planform similar to a flat rectangular slider, but with fabric pleated along the edges. GLYPH<127> Split, capable of being disassembled into halves after deployment .  GLYPH<127> Spider, made of two lengths of webbing sewn in an “X,” and usually used with pilot chute  controlled reefing. See  Pilot Chute Controlled Reefing (PCR). GLYPH<127> Removable. See  Removable Deployment System .  Slider Stop:  A small piece of rigid material (metal, plastic, phenolic, etc.) normally covered in tape or light  webbing, installed on the lower edge of a stabilizer panels to prevent a slider grommet from riding up over  the stabilizer material and damaging the stabilizers or the slider. Slider Stop Chafing Pad: A tape or fabric reinforcement installed on a stabilizer at a slider stop to  reduce wear from abrasion. Soft link: A connector link constructed primarily of fabric or tape.  Span: The distance from one side of a canopy to the opposite side. Measurements taken at various  distances aft of the nose will yield different results, Measurements taken across the upper surface will  typically be longer than those taken across the lower. An average span, or separate leading and trailing  edge dimensions, may be specified. Airfoil dimensions are assumed to be finished dimensions unless  otherwise specified. See also  Chord .  Page 4 of 8 Change 1 (December 2015)  A-6