PZL SW-4
SW-4 | |
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SW-4 prototype | |
Role | Multipurpose utility helicopter |
National origin | Poland |
Manufacturer | PZL-Świdnik |
First flight | 29 October 1996 |
Introduction | 2002 |
Status | In service |
Primary user | Polish Armed Forces |
Number built | 40[1] |
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The PZL SW-4 Puszczyk (pl. Tawny Owl) is a Polish light single-engine multipurpose helicopter manufactured by PZL-Świdnik.
Development
The origins of PZL-Swidnik's SW4 five seat light utility helicopter date back to the early 1980s.
PZL-Swidnik began development of a new four/five place light utility helicopter about 1981. This original SW4 was to have been powered by a 300kW (400 shp) PZL Rzeszow GTD350 turbo shaft with the prototype mockup. It could reach the rated top speed of about 240km/h (130kt) and a max range with auxiliary fuel tank about 900km (485nm).
The restructuring the powers of the previous Iron Curtain countries allowed PZL-Swidnik to redesign the SW4, on the base around the Allison (now Rolls-Royce) Model 250 turbo shaft. Aside from the power plant, design changes included a more streamlined fuselage and revised tail and tail boom.
The ground test of a non flying prototype, was launched in December 1994. The two consequent air born prototypes were completed, the first flew on or about October 26, 1996.
PZL-Swidnik targeted US FAA FAR Part 27 certification for the SW4, which was believed it should allow it to enter production by 1999. PZL Swidnik management decided however to redesign the rotor head, what resulted in a very costly delay. The purpose was to enlarge the horizontal stabilizer and to improve the hydraulic systems.
Once the basic Rolls-Royce powered SW4 become certified it should also be re-certified for production at PZL Swidnik including Pratt & Whitney Canada PW200- power plant variant. A twin power plant model was developed in consideration with forthcoming European regulations which would restrict single engine helicopter operations.
The SW4 as planned was expected to fulfill a range of utility missions ranging from civil and executive transport to Medevac, police, border patrol duties and some of military pilot training tasks; however, customers have thus far been limited to the Polish military. The optionally-manned PZL-Świdnik SW-4 Solo will fly from an RN ship in 2014 as part of the UK’s RWUAS (Rotary Wing Unmanned Air System) Capability Concept Demonstrator (CCD) programme. [2] At the present time all of the SW-4 are now serving as the training equipment for "The Center of Aviation Education and Training at Dęblin" (Ośrodka Szkolenia Lotniczego w Dęblinie).
In 2006, PZL-Świdnik entered however into an agreement with China's Jiujiang Hongying Technology Development Ltd. to assemble the SW4 at Jiujiang, China, hopefully targeting some international market for SW4. The maiden flight of the first SW4 co-produced in China took place on or about 25 February 2010. [3] The 2011 development of the RUAV (Rotorcraft Unmanned Aircraft Vehicle) version have had been initiated.[4] First was shown at the MSPO 2012 in Poland as "SW-4 Solo" RUAS/OPH platform (Rotorcraft Unmanned Air System/Optionally Piloted Helicopter) and was expected to be initially deployed by 2013. [5]
Design
One 335kW (450 shp) (283kW/380 shp max continuous rated) Rolls-Royce Model 250C20R/2 turbo shaft driving a three blade main rotor and two blade tail rotor. Option of one 460kW (615 shp) Pratt & Whitney Canada PW200/9 turbo shaft.
Rolls-Royce Model engine - Max speed 232 km/h (125 kn), normal cruising speed 200 km/h (108 kn). Initial rate of climb 1973 ft/min. Service ceiling 17,820 ft (5,430 m) Max range with standard fuel and no reserves 860 km (464 nmi). Endurance 5 h 8 min.
Operators
Specifications (SW-4)
Data from {name of first source}
General characteristics
- Crew: one, pilot
- Capacity: 4 passengers
- Length: 10.57 m (34 ft 8 in)
- Rotor diameter: 9.00 m (29 ft 6 in)
- Height: 3.05 m (10 ft 0 in)
- Disc area: 64 m² (684 ft²)
- Empty weight: 1,050 kg (2,310 lb)
- Loaded weight: 1,600 kg (3,520 lb)
- Max. takeoff weight: 1,800 kg (3,960 lb)
- Powerplant: 1 × Rolls-Royce Model 250-C20R/2 turboshaft engine, 336 kW (457 shp)
Performance
- Maximum speed: 260 km/h (141 knots, 162 mph)
- Range: 790 km (427 nmi, 493 mi)
- Service ceiling: 5,200 m (17,056 ft)
- Rate of climb: 618 m/min (2,027 ft/min)
- Disc loading: 3.4 kg/m² (0.7 lb/ft²)
- Power/mass: 0.21 kW/kg (0.13 hp/lb)
See also
- Related development
- Bell 206
- Cicaré CH-14
- Eurocopter Colibri
- Schweizer 333
- MD Helicopters
- MD Helicopters MD 500
- MD Helicopters MD 600
- MD Helicopters MD Explorer
- Related lists
- List of helicopter models
References
- ↑ La prima volta di PZL Swidnik sotto la bandiera AgustaWestland.
- ↑ http://gdziewojsko.wordpress.com/listy/sw-4/PZL SW-4 Puszczyk w Wojsku Polskim
- ↑ http://slide.mil.news.sina.com.cn/slide_8_202_2959.html Maiden Flight of SW4 Co-Produced in China
- ↑ AgustaWestland developing optionally manned demonstrator. flightglobal
- ↑ PZL-Świdnik prezentuje po raz pierwszy SW-4 „Solo” RUAS/OPH. pzl.swidnik.pl
- ↑ "World Air Forces 2013" (PDF). Flightglobal Insight. 2013. Retrieved 15 February 2013.
External links
Wikimedia Commons has media related to SW-4. |
- List of all SW-4 helicopters used by Polish Air Force
- Description on manufacturer's page
- SW-4 Production list, Program history
- SW-4 Photo gallery
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