Wiederkehr GHW-1 Cu-Climber

GHW-1 Cu-Climber
Role	Glider
National origin	United States
Designer	George H. Wiederkehr
First flight	1968
Introduction	1968
Status	Sole example still flying
Number built	One

The Wiederkehr GHW-1 Cu-Climber is an American, high-wing, single-seat glider that was designed by George H. Wiederkehr and first flown in 1968.^[1][2]

Design and development

The Cu-Climber is an original design and is of mixed construction, with the fuselage of fibreglass with foam bullkheads, forming a semi-monocoque structure. The wings are a fiberglass and balsa sandwich, with fibreglass skin, except aft of the spar on the under-surface where aircraft fabric covering is employed. The wing also features a large 12 inch (30 cm) X 6 inch (15 cm) box spar that is made from spruce, plywood and fiberglass, which is stressed to +9.6/-6.3 g. The wing employs a Pfenninger 14% airfoil.^[1][2][3]

The control surfaces include an all flying tail fitted with an anti-servo tab and full-span ailerons of very short chord that act as flaps when drooped for glidepath control. The landing gear is a fixed monowheel that is faired to reduce drag.^[1][2]

The aircraft's designation of GHW-1 indicates the designer's initials. Unusually the aircraft is registered with the Federal Aviation Administration simply as Amateur Built 68 glider. Only one example was ever constructed.^[1][2][3]

Operational history

In 1983 Soaring Magazine reported that the GHW-1 was being regularly flown and that the designer was constructing a new GHW-2. In May 2011 the GHW-1 was still registered to Wiederkehr. The GHW-2 was completed and in May 2011 was owned by Anthony C. Wiederkehr.^[2][3][4]

Specifications (GHW-1)

Data from Sailplane Directory and Soaring^[1][2]

General characteristics

• Crew: One
• Wingspan: 47 ft 7 in (14.50 m)
• Wing area: 127 sq ft (11.8 m²)
• Airfoil: Pfenninger 14%
• Empty weight: 480 lb (218 kg)
• Gross weight: 700 lb (318 kg)

Performance

• Maximum glide ratio: 28 to 32:1 (estimated) at 55-60 mph (89-97 km/h)
• Rate of sink: 126 ft/min (0.64 m/s) to 150 fpm (0.76 m/s) (estimated) at 44-50 mph (71-80 km/h)
• Wing loading: 5.5 lb/sq ft (27 kg/m²)

See also

Related lists

• List of gliders
  

References

1. ^ ^{a b c d e} Activate Media (2006). "Cu-Climber GHW-1 Wederkehr". http://www.sailplanedirectory.com/PlaneDetails.cfm?PlaneID=64. Retrieved 13 May 2011. 
2. ^ ^{a b c d e f} Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 43. Soaring Society of America November 1983. USPS 499-920
3. ^ ^{a b c} Federal Aviation Administration (May 2011). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=6419. Retrieved 13 May 2011. 
4. ^ Federal Aviation Administration (May 2011). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=102AW. Retrieved 15 May 2011.