Question: Mitchellville, Maryland's Freeway Airport has a collection of planes that includes what type of single-engine plane built by Piper Aircraft?

Context paragraphs:
Piper PA-8: The Piper PA-8 Skycycle was a 1940s American single-seat light aircraft designed and built by Piper Aircraft at their Lock Haven, Pennsylvania plant.  Towards the end of 1944 Piper announced a number of aircraft it intended to build after the war.  One of these was the PWA-8 (Post War Airplane 8).  An aerodynamic test aircraft was built with the name Cub Cycle and it first flew on 27 August 1944 with a small two cylinder Franklin engine.  The Franklin engine was replaced by a 37 hp Continental A-40-3 and the aircraft first flew with the Continental engine on 12 September 1944.  The Skycycle was a fabric-covered mid-wing single-engined single-seat monoplane with a tailwheel landing gear.  The fuselage was produced using a belly fuel tank as used on the F4U Corsair.  The Cub Cycle was scrapped and a similar but new aircraft was built with the name Skycycle.  The Skycycle first flew on 29 January 1945 using the same Continental engine as the Cub Cycle.  The aircraft was further modified in 1945 with a 55 hp Lycoming O-145-A2 engine and designated the PA-8 Skycycle.  No further examples were built.

Piper PT-1: The Piper PT-1 was a 1940s American two-seat primary training monoplane designed and built by Piper Aircraft at Lock Haven.  A low-wing tandem two-seat monoplane, the PT-1 was the first Piper aircraft to have a low-wing.  It had a fabric covering over an all-metal fuselage frame and wooden spar wings and tail unit.  The PT-1 had a retractable tailwheel landing gear and was powered by a 130 hp Franklin 6AC-2980D engine.  No further aircraft were built.  A four-seat development was designed as the Piper PWA-6 which did not go into production either.

Freeway Airport: Freeway Airport (FAA LID: W00) is a privately-owned airport located in Mitchellville, Prince George's County, Maryland, United States.  They have Cessna 152's, 162's, 172's, a PA28R-200 IFR, and a PA-44 180 IFR available to rent.

Robert DeLaurentis (aviator): Robert DeLaurentis is an American aviator, businessman and author.  He was the first solo pilot to fly a Piper Malibu Mirage, a small, single-engine plane, around the world May 17, 2015 to August 14, 2015.  The flight covered 26,000 nautical miles and 23 countries in the ninety-eight days for a fundraising campaign to support aviation programs.

Stinson 108: The Stinson 108 was a popular general aviation aircraft produced by the Stinson division of the American airplane company Consolidated Vultee, from immediately after World War II to 1950.  It was developed from the prewar Model 10A Voyager.  Stinson was bought by Piper Aircraft in 1949.  All Stinson model 108, 108-1, 108-2, 108-3 and 108-4 aircraft were built by Stinson at Wayne, Michigan.  When Stinson sold the type certificate to Piper in 1949, approximately 325 airplanes of the 5,260 model 108s built by Stinson were complete but unsold.  These 325 model 108s went to Piper as part of the sale.  Piper then sold that inventory as the Piper-Stinson over the next few years.

Piper PA-18 Super Cub: The Piper PA-18 Super Cub is a two-seat, single-engine monoplane.  Introduced in 1949 by Piper Aircraft, it was developed from the Piper PA-11, and traces its lineage back through the J-3 to the Taylor E-2 Cub of the 1930s.  In close to 40 years of production, over 9,000 were built.  Super Cubs are commonly found in roles such as bush flying, banner and glider towing.

Piper PA-28 Cherokee: The Piper PA-28 Cherokee is a family of light aircraft built by Piper Aircraft and designed for flight training, air taxi, and personal use.  The PA-28 family of aircraft are all-metal, unpressurized, single-engine, piston-powered airplanes with low-mounted wings and tricycle landing gear.  They have a single door on the copilot side, which is entered by stepping on the wing.

Woodmore, Maryland: Woodmore is an unincorporated area and census-designated place (CDP 86710) within the boundaries of Route 193 (Enterprise Road) to the west, Church Road to the east, Route 214 (Central Avenue) to the south and Route 50 to the north.  Woodmore Road runs east and west through the center.  It contains a large gated community and country club (see Country Club at Woodmore) on the north side of Woodmore Road, and the developments of Woodmore Meadows and Woodmore South on the south side, as well as various other custom built homes and farmland.  Off Enterprise Road sits the development of Kingsford.  It is contiguous with the year 2010 Mitchellville, Maryland CDP, and historically had a Mitchellville mailing address, for many years served by the South Bowie/Mitchellville Post Office with zip code 20721 and has been considered part of Mitchellville.  The Woodmore and Mitchellville community is notable as one the most affluent predominantly African-American community in the United States.  The population of Woodmore (defined by CDP 86710) was 3,936 at the 2010 census.

Piper PA-24 Comanche: The Piper PA-24 Comanche is an American four-seat or six-seat, low-wing, all-metal, light aircraft of semi-monocoque construction with tricycle retractable landing gear.  Piper Aircraft designed and developed the Comanche, which first flew on May 24, 1956.  Together with the PA-30 and PA-39 Twin Comanche, it made up the core of the Piper Aircraft lineup until 1972, when the production lines for both aircraft were wiped out in a flood.

Piper PA-12: The Piper PA-12 Super Cruiser is an American three-seat, high wing, single-engine conventional landing gear-equipped light aircraft that was produced by Piper Aircraft between 1946-48.  The PA-12 was an upgraded and redesignated Piper J-5.

Supporting paragraphs: Freeway Airport Piper PA-28 Cherokee
Answer: Piper PA-28 Cherokee