Sikorsky S-300

The Schweizer 300C (formerly Hughes 300C Hughes 269C also ) is a light helicopter, which is used in the pilot training, for observation, police duties, agricultural operations and in recreational flying. It is equipped with a piston engine.

Background of the development

The Schweizer 300C is a development of the Hughes Model 269 ( the military version Name: YHO - 2HU and TH -55A ). The 300C (originally referred to as Hughes 269C ) was created from the model derived from the 269A and 269B somewhat enlarged model (sold as Hughes 300); the main difference from its predecessors was the use of the stronger engine Lycoming H1O -360 D1A with 190 hp and an enlarged from 7.71 m to 8.14 m Main rotor diameter. The 300C had its first flight on March 6, 1969, received FAA certification in May 1970. After production of 2,800 helicopters of all versions of the model series 269/300/TH-55A by the company Hughes Helicopters licensed production was acquired in July 1983 by the Schweizer Aircraft Corporation. Production in Elmira (New York) began in November 1983, the first built in the Swiss aircraft flew in June 1984. 1986, the company Swiss secured permanently all rights to the series 269 of the company McDonnell Douglas, which in 1984 the licensor Hughes bought. At this time the machine was briefly referred to as Swiss -Hughes 300C, later only as a Schweizer 300C.

2004 Swiss was acquired by Sikorsky Aircraft Corporation and subsequently traded as a subsidiary of Sikorsky, the original company name (company) was retained. Since then, the helicopter is marketed under the name Swiss ™ S -300C ™ helicopter since 2009 the Sikorsky Global Helicopters trading as corporate division for civil aircraft. The variant 300CBi is also part of the program.

Despite this checkered history both basic construction as well as the visual appearance of the machine in all these years have not changed significantly. Also is the required in the German private pilot's license -H license entry ( TRT ) for the entire model 269A ,-B ,-C and 300C -CB and CBi and Breda Nardi 269 still on " Hu 269 ".

Construction

The 300C is built in classical Haupt-/Heckrotor-Konfiguration. The main rotor has three blades and is in the top view on the left ( counterclockwise) rotation. The rotor head has a rigid center plate and shock and pivot joints with elastomeric dampers. The two-bladed tail rotor is mounted on the left side of the abgestrebten down the tail boom and is driven by the main gear from a shaft. All control elements are directly mechanically hinged, there are no hydraulic steering assistance required. The Hull cell is in the central part of a tubular timber, a closed, for the most part glazed cockpit with two seats side by side and a skid landing gear with shock absorbers. The air-cooled and equipped with a cooling fan four-cylinder boxer engine Lycoming H1O -360 D1A is installed in a lying position open behind the cockpit and under the main gear. The two fuel tanks are located on both sides above the engine and just behind the main rotor mast.

Variants

Swiss 300CBi

The system introduced in 2002 S- 300CBi is tailored to the requirements of the pilot training variant. Through the use of the weaker Textron Lycoming HIO -360 G1A with petrol injection with 180 hp instead of the petrol engine of the 300C susceptibility to carburettor icing was eliminated, further comprising means for automatically engaging and raising the rotor is installed to protect against engine overspeeding. This prevents incorrect operations and facilitates handling in the school system. The dimensions are largely identical to the 300C, the flight performance and payload are lower.

Project Firefly

On the EAA AirVenture Oshkosh, the project Firefly was presented as a prototype of Sikorsky in July 2010. The helicopter based on the Swiss 300C is equipped with a 190 horsepower electric motor which derives its electric power from a lithium ion battery cells 300, which provide an electric voltage of 370 volts. The helicopter was adapted from Eagle Aviation Technologies, the first flight was planned for the first half of 2011. However, there are to date ( August 2013 ) no information that the flight is actually made. Can only be flown with pilot without payload and other passengers, the flight time of approximately 15 minutes and the speed should be about 80 knots.

Specifications

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