Engineering:Aviastroitel AC-7M
| AC-7M | |
|---|---|
| Role | Motor glider |
| National origin | Russia |
| Manufacturer | Aviastroitel |
| Designer | Vladimir Egorovich Fedorov |
| First flight | 2005 |
| Introduction | 2006 |
| Status | In production (2011) |
| Number built | at least two |
| Variants | Aviastroitel AC-7 |
The Aviastroitel AC-7M is a Russian mid-wing, T-tailed, two-seats in side-by-side configuration motor glider that was designed by Vladimir Egorovich Fedorov and produced by Aviastroitel, now Glider Air Craft.[1][2][3]
Design and development
Development of the AC-7M was started in 2002, it was first flown in 2005 and by 2006 two prototypes had been completed.[1][3]
The AC-7M is a conventional self-launching sailplane, but is equipped with a more powerful retractable pusher configuration Hirth F30A25A 77.2 kW (104 hp) two stroke engine than is normal in these types, allowing it to be also used as a glider tug and as touring motor glider. The aircraft is capable of cruising at 180 km/h (112 mph) for 1,800 km (1,118 mi) while burning only 9 litres per hour (2.0 imp gal/h; 2.4 US gal/h) of fuel.[1][2][3]
The AC-7M uses a two bladed wooden propeller of 1.18 m (46 in) diameter. The 18 m (59.1 ft) span wing employs a Wortmann FX60-157 airfoil and mounts Fowler flaps. The wings are mounted on the fuselage with a single cam-pin and the ailerons and air brakes hook-up automatically. The fixed landing gear consists of a narrow track pair of rubber-suspended 360 mm (14.2 in) main wheels, a 310 mm (12.2 in) nose wheel and a 200 mm (7.9 in) tail caster. The main wheels incorporate lever-actuated drum brakes. The cockpit can accommodate pilots up to 190 cm (74.8 in) in height. The canopy provides 300° field of view and is jettisonable. Assembly from its trailer takes four people 20 minutes.[1][2][3]
The AC-7M was later developed into the unpowered and redesigned AC-7.[4]
Variants
- AC-7M
- Side-by-side, two seat motor glider with a retractable Hirth F30A25A 77.2 kW (104 hp) two stroke engine.[1][2]
- AC-7K
- Development of the AC-7M, but with a fuselage-mounted Rotax 912ULS 73.5 kW (99 hp) four stroke engine, driving a retractable 1.18 m (46 in) diameter, two bladed wooden propeller.[5]
Specifications (AC-7M)
General characteristics
- Crew: one
- Capacity: one passenger
- Length: 7.15 m (23 ft 5 in)
- Wingspan: 18 m (59 ft 1 in)
- Height: 1.65 m (5 ft 5 in)
- Wing area: 13.5 m2 (145 sq ft)
- Aspect ratio: 24:1
- Empty weight: 490 kg (1,080 lb)
- Gross weight: 680 kg (1,499 lb)
- Powerplant: 1 × Hirth F30A25A , 77.2 kW (103.5 hp)
- Propellers: 2-bladed, 1.180 m (3 ft 10 in) diameter
Performance
- Cruise speed: 180 km/h (110 mph, 97 kn)
- Stall speed: 74 km/h (46 mph, 40 kn)
- Never exceed speed: 220 km/h (140 mph, 120 kn)
- Range: 1,800 km (1,100 mi, 970 nmi)
- g limits: +5.3/-2.65
- Maximum glide ratio: 38:1 at 105 km/h (65 mph)
- Rate of climb: 4.5 m/s (890 ft/min)
- Rate of sink: 0.8 m/s (160 ft/min) at 110 km/h (68 mph)
- Wing loading: 50 kg/m2 (10 lb/sq ft)
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Aviastroitel (2006). "This Russian enterprise Aviastroitel". http://www.glidingsport.ru/ac/en/ourhistory/inde07.html. Retrieved 5 October 2011.
- ↑ 2.0 2.1 2.2 2.3 2.4 Glider Air Craft (n.d.). "Motorglider AC-7M". http://www.glider.ru/en/glider/motorglider-ac-7m. Retrieved 7 October 2011.
- ↑ 3.0 3.1 3.2 3.3 Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 174. Flying Pages Europe SARL, 2015. ISSN 1368-485X
- ↑ Glider Air Craft (n.d.). "Double seated glider AC-7". http://www.glider.ru/en/glider/planer-dvuhmestnyy-ac-7. Retrieved 10 October 2011.
- ↑ Glider Air Craft (n.d.). "Motorglider AC-7K". http://www.glider.ru/en/glider/motoglider-ac-7k. Retrieved 10 October 2011.
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