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Bird Builders Taurus
The Taurus double-surface wing featured a cable-tensioned trailing edge. Control is through balanced wing tip drag rudders, operated by either swing seat or optional twist grips. Pitch control is through weight shift. It is fully collapsible and breaks down to a package approximately 14 ft x 10 ft x 20 ft 6 in long.
The leading edge spars are 1.75in x .049in 6063 T-832 and the trailing edge is 1.5in x .049in 6063 T-6. All other tubing is 1in 6061 T-6 of various wall thicknesses. The upper and lower ribs are .5in x .035 6061 T-6. The spars are sleeved at stress points and all joints are either wood dowelled or aluminium bushed.
Cables are 3/32in 7x7 stainless steel white vinyl coated. All thimbles are stainless steel and the cable ends have double nico press sleeves. All tangs have spar saddles. Wing root channels, shackles and tangs are all stainless steel. All other channels are anodised aluminium. Injection moulded saddles are used throughout. Nuts, bolts, turnbuckles and quickpins are all aircraft quality.
The Taurus has an adjustable kingpost for tight rigging, drag and anti-drag wires, as well as the cable-tensioning trailing edge, both fully adjustable. Prone flying was available as a special option.
The sail is Howe and Bainbridge 3.8 ox dacron in 11 standard colours. All stress points are reinforced. Stitching is boh zig-zag and straight, depending on application. The sail features .035in fibreglass sheet battens on the leading edge for smoothness. 2in velcon Velcro is used on the centre section panels.
The Taurus came standard with a supine harness and features individual leg straps and 4in wide back strap.
Leading edge: 19 ft
Chord length: 5 ft
Wing span: 34 ft
Wing area: 155 sq,ft
Aspect ratio: 7.6:1
Nose angle: 20˚
Weight: 70 lb
Pilot weight: 135-200 lb
Takeoff speed: 18 mph
Stall speed: 16 mph
Max speed: 60 mph
Best glide ratio (L/D): 10:1
Best L/D speed: 25 mph
Min sink: 180 fpm

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