Schweizer 333
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| Schweizer 330/333 | |
|---|---|
| Type | Light utility and trainer helicopter |
| Manufacturer | Schweizer Aircraft Corporation |
| Maiden flight | June 14, 1988 |
| Introduced | 1992 |
| Status | In production |
| Developed from | Schweizer 300 |
| Variants | MQ-8 Fire Scout |
The Schweizer 330 and 333 are turbine-powered developments of the Schweizer 300 light piston-powered helicopter. As of 2007, only the Schweizer 333 remains in production.[1]
Contents |
[edit] Development
[edit] Schweizer 330
In 1987, Schweizer announced development of the Schweizer 330 using the dynamic components, rotors, controls and systems of the 300C; however, it was redesigned with an all-new fuselage.[2] The first 330, converted from a 300C and powered by an Allison 250-C10A, flew on June 14 1988. The FAA certified the aircraft in September 1992.
The improved 330SP was introduced in May 1997 and featured an improved rotor and raised skids, which could be retrofitted to previous 330 models. An Allison (later Rolls-Royce) 250-C20W turboshaft was derated to 165kW (220hp), giving the 330SP excellent hot and high performance, maintaining power output to 18,000 feet.[citation needed]
[edit] Schweizer 333
Shortly after the release of the 330, Schweizer began work on upgrading the dynamic components of the Schweizer 330SP. Over two years later, Schweizer released a new variant, the Schweizer 333. Featuring the newly developed dynamic systems components and new-technology rotor blades with a cambered airfoil and a larger diameter, the upgraded helicopter benefited with a greater max gross weight, more useful load, more speed and more hover performance; nearly a 30% increase in performance over the 330SP. Schweizer created a kit to upgrade Model 330 and 330SP aircraft.[3]
In February of 2008, an improved version of the series, the Schweizer S-434, was released.[4][5]
[edit] Operational history
Schweizer was purchased on August 26, 2004, by Sikorsky Aircraft. The Schweizer 300/333 models fill a gap in the Sikorsky helicopter line, which is known for its medium and heavy utility and cargo helicopters. Sikorsky has since taken advantage of Schweizer's rapid prototyping technology, originally used during development of the 333 dynamic components and the RQ-8 prototype, to develop the X-2 Technology Demonstrator.[1]
[edit] Design
The 330 used the 300C's dynamic components, a Rolls Royce 250 turboshaft engine, and a new four-seat cockpit/cabin and body and new instrumentation
[edit] Variants
- 330
- Using the 300C dynamic components, Schweizer mounted a Rolls Royce 250-C10A engine to the airframe and developed a new four-seat cockpit/cabin and body.
- 330SP
- improved rotor and raised skids, Rolls Royce 250-C20W engine.
- 333
- Featuring new dynamic system components, new rotor blades, and high skids as standard equipment, the 333 has a 30% greater useful load than the 330SP.
- MQ-8 Fire Scout
- The MQ-8B Fire Scout is an unmannned derivative of the Schweizer 330SP/333 helicopter, with a new fuselage, new fuel system, and UAV electronics and sensors. It also utilizes a new four-bladed rotor system based on that of the Schweizer 333. The Fire Scout is currently in development for the United States Navy's VTUAV program with cooperation from Northrop Grumman. The original RQ-8A was based on the 330SP.
- 434
- Reportedly based on improvements developed for the MQ-8B, this is a new version of the 333 to be powered by the new Rolls-Royce RR300. Four-bladed main rotor.[6]
[edit] Operators
[edit] Specifications (333)
Data from International Directory of Civil Aircraft[2] and Technical specifications[7]
General characteristics
- Crew: 1-2 pilots
- Capacity: 1-3 passengers
- Payload: 1250 lb (kg)
- Length: (overall) 31 ft 2 in (9.5 m)
- Rotor diameter: 27 ft 6 in (8.38 m)
- Height: 11 ft 0 in (3.35 m)
- Empty weight: 1210 lb (549 kg)
- Loaded weight: lb (kg)
- Max takeoff weight: 2550 lb (1156 kg)
- Powerplant: 1× Rolls-Royce 250-C20W turboshaft, 235 shp (175 kW); full rating: 420 shp (315 kW)
Performance
- Cruise speed: 105 kt (194 km/h)
- Range: 319 nm (590 km)
- Rate of climb: 1380 ft/min (7.01 m/s)
[edit] References
- ^ Schweizer Aircraft 333 page
- ^ a b Frawley, Gerard: The International Directiory of Civil Aircraft, 2003-2004, page 190. Aerospace Publications Pty Ltd, 2003. ISBN 1-875671-58-7
- ^ Flug Revue article on the 333
- ^ Sikorsky announces launch of Schweizer S-434TM Commercial Helicopter at Heli-Expo
- ^ Heli-Expo 2008: Sikorsky launches Schweizer 434
- ^ Rotorcraft Report: New Schweizer Model? The Turbine 434
- ^ Technical Data Summary, Model 333
[edit] External links
[edit] See also
Related development
Comparable aircraft
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