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The Sidou João Grande, was a two-seat sailplane of high-wing.[1]

Sidou João Grande
Role	Sailplane Type of aircraft
National origin	Brazil
Manufacturer	Sidou
Designer	Antônio Sidou
First flight	1980

Design and development

The João Grande was designed by Antônio Sidou of Porto Alegre in the state of Rio Grande do Sul, this Brazilian tandem two-seater is intended for primary and advanced training and Open Class contest flying. It is a cantilever midwing monoplane similar to the Embraer EMB 400 Urupema in appearance but with a T-tail and cambered wing tips, of all-wooden construction with plywood covering and abrasion-resistant plastics finish; it is designed for aerobatics and cloud flying.

There are Schempp-Hirth air brakes on the upper and lower surfaces of the wing, which has long span ailerons and a dihedral of 3° 36'.

Specifications

Data from Taylor 1986, p. 586 harvnb error: no target: CITEREFTaylor1986 (help)

General characteristics

• Crew: 2
• Length: 9 m (29 ft 6 in)
• Wingspan: 18 m (59 ft 1 in)
• Height: 2.52 m (8 ft 3 in)
• Wing area: 12.96 m² (139.5 sq ft)
• Airfoil: Wortmann FX-61-184 (modified) at root, FX-60-126 (modified) at tip
• Empty weight: 270 kg (595 lb)
• Max takeoff weight: 450 kg (992 lb)

Performance

• Maximum speed: 300 km/h (190 mph, 160 kn)
• Stall speed: 69 km/h (43 mph, 37 kn)
• g limits: +9.75/-6.00
• Maximum glide ratio: 43:9 at 95 km/h (59 mph)
• Rate of sink: 0.57 m/s (112 ft/min) at 81 km/h (50 mph)
• Wing loading: 34.72 kg/m² (7.11 lb/sq ft)

See also

• List of Brazilian gliders

Aircraft of comparable role, configuration, and era

• Schempp-Hirth Nimbus-3
• Schleicher ASW 22
• Centrair Pegase

Notes

References

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