Engineering:Scanlan SG-1A
| SG-1A | |
|---|---|
| Role | Glider |
| National origin | United States |
| Designer | Thomas W. Scanlan |
| First flight | 1970 |
| Introduction | 1970 |
| Number built | 5 (estimated) |
The Scanlan SG-1A is an United States , single seat, pod-and-boom, high-wing, strut-braced glider that was designed by Thomas W. Scanlan in 1970 and sold in the form of plans for amateur construction.[1][2]
Design and development
The SG-1 was conceived as a very simple and economical aircraft that could be built with modest construction skills and very little financial investment. The prototype was completed in 1970 for US$400 and subsequent aircraft were built for under US$1000.[1][2]
The SG-1 is constructed with a welded steel fuselage and tail surfaces and covered with doped aircraft fabric. The wing is made from an aluminium structure, covered in aluminum sheet and features upper-surface spoilers and a modified Gö 549 airfoil. The landing gear is a monowheel with the forward fuselage protected by a skid. The airframe was static tested to 9g without failing.[1][2]
With a very low stall speed of 32 mph (51 km/h), pilots who have flown the aircraft claim that the SG-1 can fly a thermal inside a Schweizer SGS 1-26.[2]
Operational history
In April 2011 there was one SG-1 and one SG-1A on the Federal Aviation Administration registry.[3]
Variants
- SG-1
- Prototype design, with V-struts and a constant-chord wing. One built.[1][2]
- SG-1A
- Improved model, with double-tapered wings and single wing struts. About four built.[1][2]
Aircraft on display
- US Southwest Soaring Museum[4]
Specifications (SG-1A)
Data from Sailplane Directory and Soaring[1][2]
General characteristics
- Crew: one
- Wingspan: 40 ft 0 in (12.19 m)
- Wing area: 125 sq ft (11.6 m2)
- Aspect ratio: 15.4:1
- Airfoil: modified Gö 549
- Empty weight: 300 lb (136 kg)
- Gross weight: 550 lb (249 kg)
Performance
- Stall speed: 32 mph (51 km/h, 28 kn)
- Never exceed speed: 100 mph (160 km/h, 87 kn)
- Maximum glide ratio: 20:1 at 55 mph (89 km/h)
- Rate of sink: 180 ft/min (0.91 m/s) at 47 mph (76 km/h)
- Wing loading: 4.4 lb/sq ft (21 kg/m2)
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Activate Media (2006). "SG-1A Scanlan". Archived from the original on 6 May 2002. https://web.archive.org/web/20020506211342/http://www.sailplanedirectory.com/PlaneDetails.cfm?planeID=301. Retrieved 6 April 2011.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 18. Soaring Society of America, November 1983. USPS 499-920
- ↑ Federal Aviation Administration (April 2011). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=SG-1&PageNo=1. Retrieved 6 April 2011.
- ↑ US Southwest Soaring Museum (2010). "Sailplanes, Hang Gliders & Motor Gliders". http://swsoaringmuseum.org/collection.htm. Retrieved 26 May 2011.
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