The LET L-23 Super Blaník is a two-seat, all-metal structure glider with fabric covered control surfaces.

The cockpit is somewhat roomier in the L-23, and some differences are a swept fin and a T-tail, and on the L-23 flaps were deleted to save weight since they were rarely used on the LET L-13.

LET also moved the tailplane to the top of the vertical stabilizer for better protection in case of an outlanding.

If it is to be flown solo, the pilot must be sitting in the front seat and his weight (including parachute and ballast) must be at least 70 kg (154 lb).

plans a new version of the L-23, the L23NG (New Generation), with winglets and slightly higher performance (L/D ratio: 31).