The Theiss Speedster is an American

Homebuilt Homebuilt machines are machines built outside of specialised workshops or factories. This can include different things such as kit cars or homebuilt computers, but normally it pertains to homebuilt aircraft, also known as amateur-built aircraft or ...

ultralight Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailer ...

biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...

that was designed and produced by

Theiss Aviation Theiss UAV Solutions, formerly known as Theiss Aviation, is an American aircraft manufacturer based in Salem, Ohio. The company specializes in the design and manufacture of unmanned aerial vehicles and at one time produced ultralight aircraft ...

Salem, Ohio Salem is the largest city in Columbiana County, Ohio, with a small district in southern Mahoning County. At the 2020 census, the city's population was 11,915. It is the principal city of the Salem micropolitan area in Northeast Ohio. It is 18 m ...

. When it was available the aircraft was supplied as a quick-build kit for amateur construction.Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 273. BAI Communications, 15 July 1998. The Speedster is intended to resemble a 1920s era sport aircraft.

Design and development

The aircraft was designed to comply with the US

FAR 103 Ultralight Vehicles Ultralight aircraft in the United States are much smaller and lighter than ultralight aircraft as defined by all other countries. In the United States, ultralights are described as "ultralight vehicles" and not as aircraft. They are not requ ...

rules, including the category's maximum empty weight of . The Speedster features a

strut-braced In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in ...

biplane layout with

interplane struts In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in ...

, a single-seat open cockpit, fixed

conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...

with

wheel pants An aircraft fairing is a structure whose primary function is to produce a smooth outline and reduce drag.Crane, Dale: ''Dictionary of Aeronautical Terms, Third Edition'', page 206. Aviation Supplies & Academics Inc, Newcastle Washington, 1997. ...

and a single engine in

tractor configuration In aviation, the term tractor configuration refers to an aircraft constructed in the standard configuration with its engine mounted with the propeller in front of it so that the aircraft is "pulled" through the air. Oppositely, the pusher c ...

. The top wing is mounted on top of the

fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraft t ...

instead of the more usual arrangement with

cabane struts In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in c ...

suspending it above the fuselage. The aircraft is made from a combination of

aluminium Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. I ...

, wood, steel and foam. Its span wing has a total wing area of . The cabin width is . The acceptable power range is and the standard engine used is the

two stroke A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of t ...

Kawasaki 440 The Kawasaki 440, also called the T/A 440, is a Japanese twin-cylinder, in-line, two-stroke engine that was designed for snowmobiles and produced by Kawasaki Heavy Industries until the early 1980s.Cliche, Andre: ''Ultralight Aircraft Shopper's G ...

snowmobile A snowmobile, also known as a Ski-Doo, snowmachine, sled, motor sled, motor sledge, skimobile, or snow scooter, is a motorized vehicle designed for winter travel and recreation on snow. It is designed to be operated on snow and ice and does not ...

powerplant. The Speedster has a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for the pilot and baggage is . The standard day, sea level, no wind, take off and landing roll with a engine is . The manufacturer estimates the construction time from the supplied kit as 400 hours. After producing the Speedster, the company turned its attention to produce

unmanned aerial vehicle An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without any human pilot, crew, or passengers on board. UAVs are a component of an unmanned aircraft system (UAS), which includes adding a ground-based controller ...

s for the

US Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of ...

and no longer produces manned aircraft.

Operational history

By 1998 the company reported that two aircraft were completed and flying.

Specifications (Speedster)

References

{{reflist

External links

Photos of the Speedster on the company history page
Speedster 1990s United States sport aircraft 1990s United States ultralight aircraft Single-engined tractor aircraft Biplanes Homebuilt aircraft