Mechta I
Initial 1989 prototype with 13.3 m (43.6 ft) wing span.

Mechta II
1991 prototype with 13.3 m (43.6 ft) wing span.

Russia I
1992 prototype with 11.0 m (36.1 ft) wing span.

Russia II
1992 prototype with 12.6 m (41.3 ft) wing span.

AC-4A Russia
First production model introduced in 1993, with a 12.6 m (41.3 ft) wing span and taildragger landing gear.

AC-4B Russia
Model with the main wheel set further back and a nose wheel.
Also incorporates a larger cockpit for taller pilots.
Introduced in 1996.

AC-4C Russia
Improved model with retractable landing gear.
Introduced in 1997.

AC-4CK Russia
Improved model delivered as a kit.

AC-4D Russia
Improved model with winglets.

AC-4M
Motor glider model with a retractable engine, which was used as the prototype for the AC-5M. Introduced in 1999.

Solo AC-4
Current production model.
Mechta I
Initial 1989 prototype with 13.3 m (43.6 ft) wing span.
Mechta II
1991 prototype with 13.3 m (43.6 ft) wing span.
Russia I
1992 prototype with 11.0 m (36.1 ft) wing span.
Russia II
1992 prototype with 12.6 m (41.3 ft) wing span.
AC-4A Russia
First production model introduced in 1993, with a 12.6 m (41.3 ft) wing span and taildragger landing gear.
AC-4B Russia
Model with the main wheel set further back and a nose wheel. Also incorporates a larger cockpit for taller pilots. Introduced in 1996.
AC-4C Russia
Improved model with retractable landing gear. Introduced in 1997.
AC-4CK Russia
Improved model delivered as a kit.
AC-4D Russia
Improved model with winglets.
AC-4M
Motor glider model with a retractable engine, which was used as the prototype for the AC-5M. Introduced in 1999.
Solo AC-4
Current production model.
Aviastroitel AC-4 Russia