The Kreider-Reisner KR-21-A was a 1928

American American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...

two-seat

monoplane 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 con ...

. It was designed and built by the Kreider-Reisner Aircraft Company of

Hagerstown, Maryland Hagerstown is a city in Washington County, Maryland, United States and the county seat of Washington County. The population of Hagerstown city proper at the 2020 census was 43,527, and the population of the Hagerstown metropolitan area (exte ...

Fairchild Aircraft Fairchild was an American aircraft and aerospace manufacturing company based at various times in Farmingdale, New York; Hagerstown, Maryland; and San Antonio, Texas. History Early aircraft The company was founded by Sherman Fairchild in ...

took over Kreider-Reisner in 1929 and continued to build them, as the Fairchild KR-21, later the Fairchild 21.

Design and development

The KR-21-A was a low-wing braced monoplane with two open tandem cockpits and powered by a 100 hp (60 kW)

Kinner K-5 The Kinner K-5 was a popular engine for light general and sport aircraft developed by Winfield B. 'Bert' Kinner. With the boom in civilian aviation after Charles Lindbergh's transatlantic flight the K-5 sold well. The K-5 was a rough running but ...

radial piston engine. It was of mixed construction and had a fixed tailwheel landing gear and was fitted with dual controls. The KR-21-B was a more powerful biplane development, using a 125 bhp

Kinner B-5 The Kinner B-5 was a popular five cylinder American radial engine for light general and sport aircraft of the 1930s. Design and development The B-5 was a development of the earlier K-5 with slightly greater power and dimensions. The main change ...

engine. Five were produced, three built as -B models and two converted from the -A. At least three, most of the production, survive today * NC107M * NC236V * NC954V The KR-21 would in turn form the basis of the KR-22 parasol-wing

design.

Specifications (KR-21-A monoplane)

References

Notes

Bibliography

* {{Fairchild aircraft 1920s United States civil utility aircraft 21 Biplanes Single-engined tractor aircraft Aircraft first flown in 1928