Cessna 170

Cessna 170
Role	Light Personal Aircraft
Manufacturer	Cessna Aircraft Company
Introduction	1948
Produced	1948-1956
Number built	5,174
Variants	O-1 Bird Dog Cessna 172

An early production Cessna 170

Cessna 170A on an ice runway near Ottawa, Ontario

Cessna 170B in flight

Cessna 170B

Cessna 170B at Centennial Airport

The Cessna 170 is a light, single-engine, general aviation aircraft produced by the Cessna Aircraft Company between 1948 and 1956.

Development

170

In late 1948 Cessna began sales of the 170, with metal fuselage and tail and fabric covered wings. These earliest 170s were four-seat versions of the popular 140 with a more powerful 145 hp (108 kW) Continental O-300 and larger fuel tanks. Like the 140, they were constructed of metal with fabric-covered wings supported by a "V" strut.

170A

In 1949 Cessna began marketing the 170A, an all-metal 170 with zero-dihedral wings, and a single strut replacing the "V" strut of the 170. This and subsequent versions of the 170 shared the fin/rudder shape of the larger Cessna 190 and 195 models.

305

In 1950, the United States Air Force, Army and Marines began using the military variant of the 170, the Model 305, designated the L-19 and later O-1 Bird Dog by the military. It was used as a forward air control and reconnaissance aircraft. The Bird Dog was extensively re-designed from the basic 170 and included a revised fuselage and wing with large modified-Fowler flaps that deploy up to 60°.

170B

In 1952, the Cessna 170B was introduced featuring a new wing incorporating dihedral similar to the military version. The B model was equipped with very effective modified-Fowler (slotted, rearward-traveling) wing flaps which deflect up to 40°^[1] and a wing design that lives on in the Cessna light singles of today (constant NACA 2412 section with a chord of 64 inches (1,600 mm) from centerline to 100 inches (2,500 mm) out, then tapering to 44-inch (1,100 mm) NACA 2412 section chord at 208 inches from centerline, with three-degree washout across the tapered section). The 170B model also included a new tailplane, a revised tailwheel, larger rear windows and other refinements over the 170 and 170A.

In 1955, the previously elliptical rear side windows were changed to a more square design.

Successor

The 170 is equipped with conventional landing gear, which is more challenging to land than tricycle landing gear. In 1956, Cessna introduced a replacement for the 170 that was essentially a nosewheel-equipped 170B with a square fin, designated the 172. 170 production was halted soon after the 172 became available.

Model 309 and 319

Between 1951 and 1955 Cessna used 170s as test beds for Boundary layer control research, designating them as models 309 and 319. The Model 309 was a 1951 project in conjunction with the US Navy and the University of Wichita and used a Cessna 170A modified with a turbine engine to blow air over the wing.^[2]

In February 1952 the 309A flew, using an engine-driven electric generator to run fans located within the wings to generate airflow that was blown over the wings.^[2]

The 1953 Model 309B used dry chemical to blow air across the wings and flaps, as did the 1954 experiments on the 309C.^[2]

Also flown in 1953 was the model 319, a Cessna 170A equipped with a Continental 225 hp (168 kW) powerplant and larger flaps along with the boundary layer control. The 319 demonstrated the capability of taking off in 190 ft (58 m), landing in 160 ft (49 m) and clearing a 50 ft (15 m) obstacle in 450 ft (137 m). The aircraft had a stall speed of 28 kn (52 km/h).^[2]

The 309/319 research projects were deemed a success, but the results were difficult to convert into commercial use and the aircraft were difficult to operate. One company test pilot described the aircraft on the test report following his first flight as: "All in all, a rather nasty little monster!".^[2]

Today

Over 5,000 Cessna 170s were built and over 2,000 are still in service today.

Specifications (170B)

Data from {name of first source}

General characteristics

• Crew: 1
• Capacity: 4 occupants
• Length: 24 ft 11.5 in (7.61 m)
• Wingspan: 36 ft (10.97 m)
• Height: 6 ft 7 in (2.01 m)
• Wing area: 174 sq ft (16.2 m²)
• Empty weight: 1,205 lb (547 kg)
• Loaded weight: 2,200 lb (998 kg)
• Useful load: 995 lb (451 kg)
• Max takeoff weight: 2,200 lb (998 kg)
• Powerplant: 1 × Continental O-300-A (2-blade Fixed pitch metal, 76 inch diameter), 145 hp (108 kW)
• Fuel capacity: 42 U.S. gal (160 L; 35 imp gal)

Performance

• Never exceed speed: 140 knots (160 mph, 245 km/h)
• Maximum speed: 124 knots (143 mph, 230 km/h)
• Cruise speed: 105 knots (121 mph, 195 km/h)
• Stall speed: 43 knots (49 mph, 79 km/h)
• Range: 513 nmi (590 miles, 950 km)
• Service ceiling: 15,500 ft (4,724 m)
• Rate of climb: 690 ft/min (210 m/min)
• Wing loading: 12.64 lb/sq ft (61.6 kg/m²)

See also

Related development

• Cessna 140
• Cessna 172
  

Aircraft of comparable role, configuration and era

• Aeronca Sedan
• Piper PA-20 Pacer
• Yakovlev Yak-12
  

References

1. ^ Phillips, Edward H: Wings of Cessna, Model 120 to the Citation III, Flying Books, 1986. ISBN 0-911139-05-2
2. ^ ^{a b c d e} Murphy, Daryl (2006). "The Cessnas that got away". http://www.wingsoverkansas.com/features/article.asp?id=461. Retrieved 2008-12-22. 

External links

• Cessna 170 guide
• Cessna Aircraft Company