Sx300 Aircraft - Designed by Edward J. Swearingen of San Antonio, Texas, the SX-300 was billed as the fastest, most expensive, and most complex kit-built aircraft at launch. It was originally supplied by Swearingen in a series of six construction sets. The powerplant was a Lycoming IO-540 using a 1.88 m (74 in) three-blade Hartzell propeller.

Swearingen is known for designing high-performance aircraft over the years, including the Merlin and Metro turboprops. He was also involved in the development of the Piper Twin Comanche and the Piper Cheyenne. Cruising at 3,810 meters (12,500 ft), the SX-300 had a top speed of 428 km/h (266 mph) at 65 percent power, giving it a range of 1,815 km (1,128). Mail with 45 minutes reserve. Maneuver speed was 289 km/h (180 mph), which allowed the pilot to maintain a relatively high speed in turbulence. Wing and fuselage cladding were heavy aluminum alloys, and the aircraft cladding provided most of the body's strength. Direct riveting was used throughout the body, navigation and communications antennas located on the fiberglass wingtips and tail. The aircraft had an electrically operated hydraulic system and the undercarriage was fully enclosed when retracted.

Sx300 Aircraft

Sx300 Aircraft

Production of the kits began in 1984, with around 88 kits known to have been supplied to builders in late 1986, but production ceased in 1989. Only 48 undercarriages were completed by AirWright of Wichita, Kansas, a subcontractor. Only a few aircraft known in the United States include the N70SX, N53SX, N3RT, N330SX, N2H, N42SX, N54J, N74SX, N3RT, N41TS, N350G, and N6Y.

Aircraft N53sx (1998 Swearingen Sx300 C/n 53) Photo By Florida Metal (photo Id: Ac514092)

A prototype was imported in 2010 by Mr Lyndon Trethaway from Goola SA, registered on 29 April 2010 as VH-SXO³ (c/n SX-AUS-01) and powered by a Textron Lycoming TIO-540-AE2A engine. is equipped with Hartzell propeller.

Another example was found in Australia and New Zealand. This aircraft (N54JX - c/n 02) was used by its owner on a round-the-world flight in 2014. On 1 July of that year, she arrived at Port Hedland in Western Australia and flew south to Perth's Jindakot. Then on August 4 Kalgoorlie, WA, Ayers Rock, NT, Hamilton Island, QLD, Cairns, QLD, Broken Hill, NSW, then Parafield to Adelaide, SA, Coffs Harbour, NSW and From Lord Howe he went to the island and arrived at Ardmore. . August 19 in New Zealand. He then hid in Wanaka for several months while his owner, Heinz Pierre, returned to Switzerland. The aircraft then took off and returned to its home port.

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