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. 

## Rigging, 

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. 

## Setting, 

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: 

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 . 

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 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. 

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 . 

