Victorian Balloon-Back Chair

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Size at its defaults: 20.5 × 22.6 × 35.4 in (520 × 573 × 900 mm)

Sliders

Back

Parameter	Name	Range	Default
Hoop Swell Each Side	`swell`	0.9–1.6 in (24–40 mm)	1.2 in (30 mm)
Hoop Rim Width	`rim_w`	1.3–1.9 in (34–48 mm)	1.6 in (40 mm)
Stile Waisting	`stile_waist`	0.2–0.5 in (4–12 mm)	0.3 in (8 mm)
Hoop / Rear Leg Thickness	`hoop_th`	1.3–1.7 in (32–42 mm)	1.4 in (36 mm)
Cross Rail Height (ends)	`cross_h`	2.0–2.5 in (50–64 mm)	2.2 in (56 mm)
Cross Rail Arch	`cross_rise`	0.6–1.2 in (14–30 mm)	0.9 in (22 mm)
Cross Rail Thickness	`cross_th`	0.8–1.1 in (20–28 mm)	0.9 in (24 mm)

Envelope

Parameter	Name	Range	Default
Seat Width	`seat_width`	16.5–20.5 in (420–520 mm)	18.1 in (460 mm)
Seat Depth	`seat_depth`	15.7–18.9 in (400–480 mm)	17.3 in (440 mm)
Seat Height (stuffed top)	`seat_height`	16.9–19.3 in (430–490 mm)	18.1 in (460 mm)
Back Height Above Seat	`back_height`	15.7–20.5 in (400–520 mm)	17.3 in (440 mm)
Back Post Rake	`back_rake`	8–12°	10°

Fit

Parameter	Name	Range	Default
Glue Relief	`glue_clearance`	0.0–0.0 in (0–0 mm)	0.0 in (0 mm)

Seat

Parameter	Name	Range	Default
Serpentine Front Bow	`bow`	2.0–2.8 in (50–70 mm)	2.2 in (56 mm)
Stuffed Seat Thickness	`pad_h`	2.4–3.5 in (60–90 mm)	2.6 in (65 mm)
Seat Overhang	`pad_over`	0.2–0.6 in (6–16 mm)	0.4 in (10 mm)
Caster Height	`caster_h`	1.5–2.2 in (38–55 mm)	1.8 in (45 mm)

Stock

Parameter	Name	Range	Default
Leg Section (knee block)	`leg_dim`	1.6–2.0 in (40–50 mm)	1.7 in (44 mm)
Rear Foot Section	`leg_taper_to`	0.9–1.3 in (24–32 mm)	1.1 in (28 mm)
Front Rail Height	`front_rail_h`	2.4–3.0 in (60–76 mm)	2.6 in (66 mm)
Side Rail Height	`side_rail_h`	2.2–2.8 in (56–70 mm)	2.4 in (62 mm)
Back Seat Rail Height	`back_seat_rail_h`	2.0–2.8 in (50–70 mm)	2.4 in (60 mm)
Rail Thickness	`rail_th`	0.7–1.0 in (18–26 mm)	0.9 in (22 mm)

Techniques used

Licence: CC BY 4.0 (pending counsel review).