Cessna 170

The Cessna 170 is a single-engine, four-seat light aircraft that Cessna built from 1948 to 1956. It began as a four-seat development of the two-seat Cessna 140, with a more powerful 145 horsepower Continental engine and an extra interconnected fuel tank, and it kept the tailwheel layout. The first aircraft had a metal fuselage with fabric-covered wings, and the 170A of 1949 moved to an all-metal wing. The 170B of 1952 introduced a new tapered wing with modified Fowler flaps adapted from the military Model 305, the aircraft the services knew as the L-19 and later the O-1 Bird Dog. A single 170C prototype with a squared tailfin was converted back to 170B standard, but its design became the basis of the Cessna 172, which replaced the 170 in production in 1956.