Piper PA-23 - Variants

Variants

PA-23 Twin-Stinson

Original designation of the Piper PA-23 Apache.

PA-23 Apache

Initial production version, 2047 built (including the Apache E, G and H).

PA-23-150 Apache B

1955 variant with minor changes.

PA-23-150 Apache C

1956 variant with minor changes.

PA-23-150 Apache D

1957 variant with minor changes.

PA-23-160 Apache E

PA-23 powered by two 160 hp O-320-B engines.

PA-23-160 Apache G

PA-23 with longer internal cabin and extra window.

PA-23-160 Apache H

Apache G with 0-320-B2B engines and minor changes.

PA-23-235 Apache 235

Apache with 5 seats and 235 hp O-540 engines, 118 built.

PA-23-250 Aztec

Apache G with modified rear fuselage, new fin and rudder and 250hp Lycoming O-540-A1D engines, 4811 built (including sub-variants)

PA-23-250 Aztec B

Aztec with longer nose for a baggage compartment; six seats, new instrument panel and changes to systems.

PA-23-250 Aztec C

Aztec B with either IO-540-C4B5 engines or turbocharged TIO-540-C4B5 as an option, also modified engine nacelles and modified landing gear.

PA-23-250 Aztec D

Aztec B with revised instrument panel and controls.

PA-23-250 Aztec E

Aztec D with longer pointed nose and a single piece windshield.

PA-23-250 Aztec F

Aztec E with improved systems and cambered wingtips and tailplane tip extensions.

PA-23T-250 Turbo-Aztec

Generally similar to the Aztec F, powered by two TIO-540 piston engines, fitted with a Garret turbocharging system.

U-11A

United States Navy designation formerly UO-1.

UO-1

United States Navy designation for PA-23-250 Aztec with additional equipment; 20 delivered, later re-designated U-11A.

PA-41P Pressurized Aztec

Pressurized Aztec concept, one built.

Seguin Geronimo

Apache with a series of modifications to the engines, nose and tail.