SZD-45 Ogar

SZD-45 Ogar
Role	2-seat Motorglider
National origin	Poland
Manufacturer	SZD (Szybowcowy Zakład Doświadczalny)
Designer	Tadeusz Labuc[1]
First flight	29 May 1973[1]
Number built	65[1]

The SZD-45 Ogar (Greyhound) is a T-tailed cantilever high-wing monoplane of wooden, aluminium and fibreglass construction designed and manufactured in Poland.

Design and development

Designed bu Dipl.-Ing. Tadeusz Labuc, the 2-seat Ogar is intended for training glider pilots from ab-initio to advanced stages as well as cross-country flying. The first prototype,(reg. no. SP-0001), first flew on 29 May 1973 powered by a 34 kW (45 hp) Stark-Stamo engine. Due to the Stamo engine being unavailable, production SZD-45A Ogars were built with 51 kW (68 hp) Limbach SL1700EC engines and later with Franklin 2A-120 engines as the SZD-45-2 Ogar F.^[1]

Of pod and boom layout the Ogar has a T-tail on a tubular Aluminium alloy tubular boom extending from the keel of the fuselage pod, which houses the cockpit and engine. A variety of materials are used in construction, with a glass-fibre cockpit shell over two load bearing wooden frames. The wings are of wooden single spar construction skinned with plywood and covered with glass-fibre. The engine is mounted at the rear of the fuselage pod, aft of the wing trailing edge at the same level and driving a pusher propeller. The undercarriage consists of a semi-retractable mainwheel fitted with a disc brake, steerable tailwheel and optional outrigger wheels on flexible struts at the wing-tips. Accommodation for two pilots is provided side-by-side under an aft-hinged upward opening canopy. The Ogar was certified for simple aerobatics.^[1]

Of the 64 production aircraft 41 were exported;those destined for the United States were powered by dual ignition, turbocharged, Revmaster/Volkswagen VW 2962 engines.^[1]

Variants

SZD-45 Ogar

The prototype powered by a 34 kW (45 hp) Stark-Stamo engine.^[1]

SZD-45A Ogar

Initial production variant powered by a 51 kW (68 hp) Limbach SL1700EC engines.^[1]

SZD-45-2 Ogar F

Later production aircraft powered bya 45 kW (60 hp) Franklin 2A-120A (later 2A-120CP) 2-cyl air-cooled horizontally opposed pston engine.^[1]

Specifications (SZD-45A Ogar)

Data from Jane's World Sailplanes and Motor Gliders,^[1] Gliders & Sailplanes of the World^[2]

General characteristics

• Crew: 2
• Length: 7.95 m (26 ft 1 in)
• Wingspan: 17.53 m (57 ft 6 in)
• Height: 1.72 m (5 ft 8 in)
• Wing area: 19.1 m² (206 sq ft)
• Aspect ratio: 16.2
• Airfoil: Wortmann FX-61-168/1261
• Empty weight: 470 kg (1,036 lb)
• Max takeoff weight: 700 kg (1,543 lb)
• Fuel capacity: 22 kg (48.5 lb)
• Powerplant: 1 × Limbach SL 1700EC 4-cyl. air-cooled horizontally opposed piston engine, 50.7 kW (68.0 hp)
• Propellers: 2-bladed Hoffmann pusher propeller

Performance

• Maximum speed: 180 km/h (112 mph; 97 kn) at sea level in straight and level flight
• Stall speed: 68 km/h (42 mph; 37 kn)
  
• Max Rough air speed: 89 km/h (55 mph; 48 kn)
• Never exceed speed: 225 km/h (140 mph; 121 kn)
• Range: 549 km; 296 nmi (341 mi)
• Maximum glide ratio: 27.5 at 100 km/h (62 mph; 54 kn)
• Rate of sink: 0.96 m/s (189 ft/min) at 73 km/h (45 mph; 39 kn)
• Wing loading: 36.6 kg/m² (7.5 lb/sq ft)

Notes

1. Coates, Andrew (1980). Jane's World Sailplanes and Motor Gliders. London: Jane's Publishing Company. p. 133. ISBN 0 7106 0017 8.
2. Hardy, Michael (1982). Gliders & Sailplanes of the World. Shepperton: Ian Allan Ltd. p. 173. ISBN 0 7110 1152 4.

References

• Hardy, Michael (1982). Gliders & Sailplanes of the World. Shepperton: Ian Allan Ltd. p. 173. ISBN 0 7110 1152 4.
• Coates, Andrew (1980). Jane's World Sailplanes and Motor Gliders. London: Jane's Publishing Company. p. 133. ISBN 0 7106 0017 8.

External links

• Hanover Show Review 1976