Windward Performance SparrowHawk

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SparrowHawk
SparrowhawkSailplane2-view.svg
Three view drawing
Role Glider
National origin United States
Manufacturer Windward Performance
Status Production completed
Number built 35
Unit cost
US$44,500.00 (2011)[1]

The Windward Performance SparrowHawk is an American mid-wing, single-seat glider that was designed and produced by Windward Performance.[2]

Since 2016 the aircraft has been no longer advertised as available by the manufacturer.[3]

Design and development[edit]

The SparrowHawk was designed to fit into the US FAR 103 Ultralight Vehicles category, including that category's requirement that unpowered aircraft have a maximum empty weight of 155 lb (70 kg). The sailplane achieves this by utilizing a structure that is predominantly made from carbon-fiber-reinforced polymer.[2][4]

The SparrowHawk's multi-tapered, 36.1 ft (11.0 m) span wing employs five different airfoils and has an aspect ratio of 18.6:1. The wing features Schempp-Hirth style spoilers on the top surface. The cockpit can accommodate pilots who range in height from 63 to 75 in (160 to 191 cm). The landing gear is a fixed monowheel gear with an auxiliary tail wheel. The glider is finished with a two part polyurethane paint. The aircraft can be launched by auto-tow, winch-launch, or aero-tow by both light aircraft and ultralight aircraft. Aerobatics are not recommended.[2][4]

The SparrowHawk achieves a best glide ratio of 36:1 and a minimum sink rate of 119 ft/min (0.60 m/s).[5]

Specifications (SparrowHawk)[edit]

Data from Bertrand and company website[2][5]

General characteristics

  • Crew: one
  • Length: 20.6 ft (6.3 m)
  • Wingspan: 36.1 ft (11.0 m)
  • Height: 4.5 ft (1.4 m)
  • Wing area: 70 sq ft (6.5 m2)
  • Aspect ratio: 18.6:1
  • Empty weight: 155 lb (70 kg)
  • Gross weight: 415 lb (188 kg)

Performance

  • Stall speed: 32 kn (37 mph; 59 km/h)
  • Never exceed speed: 123 kn (142 mph; 228 km/h)
  • g limits: +5.48/-4.0g
  • Maximum glide ratio: 36:1 at 50 kn (58 mph; 93 km/h)
  • Rate of sink: 119 ft/min (0.60 m/s) at 38 kn (44 mph; 70 km/h)
  • Wing loading: 5.93 lb/sq ft (29.0 kg/m2)

See also[edit]

Related lists

References[edit]

  1. ^ Windward Performance (February 2011). "Pricing and Options". Retrieved 26 October 2011. 
  2. ^ a b c d Bertrand, Noel; Rene Coulon; et al: World Directory of Leisure Aviation 2003-04, page 60. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X
  3. ^ Windward Performance (2016). "Windward Performance home page". Retrieved 1 December 2016. 
  4. ^ a b Windward Performance (February 2011). "Frequently Asked Questions". Archived from the original on 18 November 2011. Retrieved 26 October 2011. 
  5. ^ a b Windward Performance (February 2011). "SparrowHawk Specifications and Performance". Archived from the original on 17 November 2011. Retrieved 26 October 2011. 

External links[edit]