The Piper PA-23, named Apache and later Aztec, was the first twin engine aircraft
built by Piper Aircraft.
Originally to be named the "Twin-Stinson" and designed as a four-seater,
low-wing, all-metal monoplane, the prototype first flew March 2, 1952. It was
renamed to "Apache 150" when it entered production in 1954. 1,231 were built.
In 1958, the Apache 160 was produced by upgrading the engines to 160 hp (119 kW),
and 816 were built before being superceded by the Apache 235, which went to
235 hp (175 kW) engines and swept tail surfaces (119 built).
Declining sales of the Apache prompted the redesign dubbed PA-23-250 Aztec, with
250 hp (186 kW) O-540 engines and six-seat capacity, which became available in
1959, and continued in production until 1982. Among other light twin engined
airplanes of its generation, the Aztec was known for its good load hauling, long
endurance, stable handling, and respectable single-engine performance, at the
cost of higher fuel consumption and a draggier, slower airframe.
The US Navy acquired 20 Aztecs, designating them UO-1, which changed to U-11A
when unified designations were adopted in 1962.
This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "Piper Aztec".