Light aircraft design was slow to start in Poland but from 1924 the Airborne and Antigas Defence League, generally known by their Polish acronym L.O.P.P., began to fund amateur builders.

[1] The HL 2 had a parasol wing with a quite thick section and a plan that was strictly rectangular apart from a central trailing edge cut-out to improve the pilot's field of view.

[1] Medwecki's greatest problem was to obtain a suitable engine and in the end had to settle for an elderly, three-cylinder 26 kW (35 hp) Anzani lent to him by Samolot, which left the HL 2 seriously underpowered.

Its fixed undercarriage had mainwheels on a single axle with rubber cord shock absorbers and supported at each end by a V-strut to the lower fuselage longeron.

It was entered as a competitor in the L.O.P.P.-organised First National Lightplane Contest held at the start of October in Warsaw but engine problems on the way there caused it to fail to meet the deadline.