Fairchild 21

KR-21
Fairchild KR-21-B of 1930
General information
Type	Two-seat biplane
National origin	United States
Manufacturer	Fairchild Aircraft
Designer	Otto C. Koppen
History
First flight	1928

The Kreider-Reisner KR-21-A is a 1928 American two-seat biplane. It was designed and built by the Kreider-Reisner Aircraft Company of Hagerstown, Maryland. ^[1] Fairchild Aircraft took over Kreider-Reisner in 1929 and continued to build them, as the Fairchild KR-21, later the Fairchild 21. ^{[2] [3]}

Design and development

Designed by Fred Seiler Jr., H.L. Puckett states "over 200 were built in 6 different models." ^[4]

The KR-21-A was a wire braced biplane with two open tandem cockpits and powered by a 100 hp (60 kW) Kinner K-5 radial piston engine. ^[2] It was of mixed construction and had a fixed tailwheel landing gear and was fitted with dual controls. ^[2]

The KR-21-B was a more powerful biplane development, using a 125 bhp Kinner B-5 engine. ^[1]

Specifications (KR-21)

Data from ^[2]

General characteristics

• Crew: 2
• Length: 21 ft 6 in (6.55 m)
• Wingspan: 28 ft 3 in (8.61 m)
• Wing area: 139 sq ft (12.9 m²)
• Empty weight: 755 lb (342 kg)
• Max takeoff weight: 1,250 lb (567 kg)
• Powerplant: 1 × Kinner K-5 5-cylinder radial piston engine, 90 hp (67 kW)

Performance

• Maximum speed: 105 mph (169 km/h, 91 kn)
• Cruise speed: 90 mph (140 km/h, 78 kn)
• Range: 425 mi (684 km, 369 nmi)
• Service ceiling: 9,440 ft (2,880 m)

References

Notes

1. "1930 Kreider-Reisner KR-21B - N954V". EAA .
2. Orbis 1985, p. 1640
3. "American airplanes – Cessna". www.aerofiles.com. 4 April 2009. Retrieved 2009-12-29.
4. Puckett, H.L. (1980). Sherman Fairchild's PT-19: Cradle of Heroes. Flambeau Lith Corporation. pp. 10–11.

Bibliography

• The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing.