Akaflieg Braunschweig SB-14 Contents Design and development Specifications (SB-14 prelim flight testing performance figures) References External links Navigation menu"SB 14 – Akaflieg Braunschweig e.V."All-Aero.come
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sailplaneGermanySchleicher ASH 26Category:German sailplanes 2000–2009
| SB 14 | |
|---|---|
 | |
| The SB-14 at ILA Berlin 2008 | |
| Role | single seat sailplane |
National origin | Germany |
| Manufacturer | Akaflieg Braunschweig |
| First flight | 17 January 2003 |
Number built | 1 |
The Akaflieg Braunschweig SB 14 is an 18 m (59 ft) Open-class sailplane designed and built in Germany in the early 2000s.
Contents
1 Design and development
2 Specifications (SB-14 prelim flight testing performance figures)
3 References
4 External links
Design and development
The SB 14 was designed to minimalist principles, reducing wetted area and use of high speed aerofil sections in a high aspect-ratio wing. As an economy measure, the tail unit of the Schleicher ASH 26 was utilised. To improve performance of the wing in a wide range of conditions, the wing-tips have swept wing-lets, as well as turbulators forward of the flaps on the undersurface of the wings.[1]
The SB 14 is a shoulder-wing sailplane constructed from carbon-fibre composite materials. The wings are of very high aspect-ratio and incorporate full span flaperons with slots for when the flaps are extended. The fuselage follows contemporary design practice with a cockpit pod and slender rear fuselage terminating in a T-tail. The cross section of the fuselage has been minimised throughout, reducing wetted area and therefore minimising drag.[1]
Control is through conventional elevator and rudder with full span slotted flaperons on the wigns and Schempp-Hirth airbrakes on the upper surfaces at about 1/3 span. The undercarriage is a conventional retractable mono-wheel main undercarriage with a steel tipped rubber block tail-skid under the fin.[1]
Flight testing, from 17 January 2003, revealed very promising performance, optimised with various aero-dynamic refinements.[1]
Specifications (SB-14 prelim flight testing performance figures)
Data from [1]
General characteristics
Crew: 1
Capacity: payload (pilot + equipmqnt) 96 kg (212 lb) ; Water ballast 160 kg (350 lb)
Length: 6.95 m (22 ft 10 in)
Wingspan: 18.00 m (59 ft 1 in)
Height: 1.23 m (4 ft 0 in)
Wing area: 10.84 m2 (116.7 sq ft)
Aspect ratio: 29.89
Airfoil: root: CA2-134 / 15V2 ; tip: CAJ1-134 / 18
Empty weight: 285 kg (628 lb)
Max takeoff weight: 541 kg (1,193 lb)
Performance
Never exceed speed: 272 km/h (169 mph; 147 kn)
Minimum speed: 70 km/h (43 mph; 38 kn)
Maximum glide ratio: 50:1 (approx)
Rate of sink: 0.5 m/s (98 ft/min)
Wing loading: 33.9 kg/m2 (6.9 lb/sq ft) to 50 kg/m2 (10 lb/sq ft)
References
 | Wikimedia Commons has media related to Category:Akaflieg Braunschweig SB-14. |
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External links
- All-Aero.com
Category:German sailplanes 2000–2009
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