The Rans S-21 Outbound is an American

STOL A short takeoff and landing (STOL) aircraft is a conventional fixed-wing aircraft that has short runway requirements for takeoff and landing. Many STOL-designed aircraft also feature various arrangements for use on airstrips with harsh conditio ...

homebuilt aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...

that was designed by Randy Schlitter and is produced by

Rans Designs Rans Designs, previously called Rans Inc. (styled all in capitals as RANS), is an American aircraft and bicycle manufacturer based in Hays, Kansas, United States. The company name is a portmanteau of the first and last names of the company founder ...

Hays, Kansas Hays is a city in and the county seat of Ellis County, Kansas, United States. The largest city in northwestern Kansas, it is the economic and cultural center of the region. As of the 2020 census, the population of the city was 21,116. It is ...

. It was introduced at

AirVenture EAA AirVenture Oshkosh (formerly the EAA Annual Convention and Fly-In), or just Oshkosh, is an annual air show and gathering of aviation enthusiasts held each summer at Wittman Regional Airport and adjacent Pioneer Airport in Oshkosh, Wisconsin, ...

in 2016. The aircraft is supplied as a quick-build kit for amateur construction or ready-to-fly.

Design and development

The S-21 Outbound 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 ...

high-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

, a two-seats-in-

side-by-side configuration Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two ...

enclosed cabin accessed via doors, fixed

tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

or optionally

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 ...

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 aircraft is made from

aluminum 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. It has ...

sheet, with both

leading edge The leading edge of an airfoil surface such as a wing is its foremost edge and is therefore the part which first meets the oncoming air.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 305. Aviation Supplies & Academics, ...

and

trailing edge The trailing edge of an aerodynamic surface such as a wing is its rear edge, where the airflow separated by the leading edge meets.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 521. Aviation Supplies & Academics, 1997. ...

extruded spars. The sheet metal parts employ final-size matched holes to reduce builder errors and speed construction. Its span wing mounts flaps and has a wing area of . The standard engine used is the Continental Titan X-340 powerplant.

Tundra tire A tundra tire (UK: ''tundra tyre'') is a large low-pressure tire used on light aircraft to allow operations on rough terrain. A common variant of tundra tire is the bushwheel brand. These tires include an integral inner tube with the valve man ...

s up to may be fitted. The aircraft has a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for the crew/pilot, passengers and baggage is . The S-21 competes with the

CubCrafters Carbon Cub EX The CubCrafters Carbon Cub EX (EX - Experimental) is an American amateur-built aircraft, designed and produced by Cub Crafters of Yakima, Washington. The aircraft is supplied as a kit for amateur construction.Vandermeullen, Richard: ''2012 Kit ...

and the American Legend Super Legend HP in the kit aircraft market. The prototype, registered N215RD, first flew on 17 December 2017, it gained

special light-sport aircraft A light-sport aircraft (LSA), or light sport aircraft, is a fairly new category of small, lightweight aircraft that are simple to fly. LSAs tend to be heavier and more sophisticated than ultralight (aka "microlight") aircraft, but LSA restrictio ...

approval in March 2018 with the

Rotax 912 ULS The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, l ...

Rotax 912 iS The Rotax 912 is a horizontally-opposed four-cylinder, naturally aspirated, four-stroke aircraft engine with a reduction gearbox. It features liquid-cooled cylinder heads and air-cooled cylinders. Originally equipped with carburetors, later ...

, Lycoming YO-233 and Titan OX-340 engines.

Operational history

In a review for ''KitPlanes'' magazine writer Dave Prizio stated that aircraft amateur builders, "seem to want a high-wing utility plane they can use to knock around the backcountry. It's nice to be able to get from here to there at 180 knots, but if there ends up being a 1200-foot dirt strip, an RV-8 doesn't look like the best choice for the trip. The point is that the utility plane is the hot ticket right now, and RANS seems to have come up with just the right plane at just the right time. And if the S-21 with a 100-hp Rotax is a good plane (it is), it is a better plane with 180 hp—a much better plane. This S-21 with the big engine and big tires was a hit at Sun 'n Fun 2019. Everyone wanted a demo ride in this popular new configuration of what is proving to be a very popular plane."

Specifications (S-21 Outbound)

References

External links

* {{Rans aircraft Rans S-21 Single-engined tractor aircraft High-wing aircraft Homebuilt aircraft Aircraft first flown in 2017