Both are two-seat, high-wing, strut-braced monoplanes with fixed tricycle undercarriage and available only as completed aircraft.

[1] Former SZD sailplane engineer Adam Kurbiel designed the predecessor of 3X55, the EOL-VLA, to conform to European JAR-VLA rules.

That plane was modified through the years to meet Canadian Advanced Ultralight and US Light Sport Aircraft rules.

[1] The European versions feature extensive structural use of carbon fibre to achieve lightness, while the 3X55 is predominantly of fibreglass construction.

Crew access is via a door on each side of the cockpit that hinges upwards and is supported by a gas strut.

[1] The wings are strut-braced with a single spar and are made from fibreglass and foam with a 15.5% CAGI.R3 airfoil.

The aircraft has removable wings, with single locking pins and quick-disconnect controls which can be easily hooked up and inspected from inside the cockpit.

[1][2] The 3X55 can be equipped with either a three-bladed, fixed pitch Czech-made Woodcomp wood/fibreglass SR 200 propeller or an electrically adjustable Woodcomp SR 2000 propeller, with an optional constant speed unit.

Data from Jane's All The World's Aircraft 2003–2004[4]General characteristics Performance