The Adler (Eagle) was designed to be a fast, light transport aircraft, carrying payloads of 600–765 kg (1,323–1,687 lb) over distances of around 750 km (470 mi; 7.5×1014 nm).

It had thick section, low-set, high aspect ratio (10.8) wings and was powered by a 210 kW (280 hp) Junkers L5 six-cylinder liquid-cooled inline engine.

Its Junkers L5 engine was mounted in the nose and neatly cowled, with its oil tank aft of a firewall and a retractable honeycomb radiator on the fuselage underside.

[1] The Adler did not have a conventional fin but the in-flight adjustable tailplane was mounted above the fuselage on a small, thin aerofoil-section step with its rear underside cut-away, and braced from below with a single strut on each side.

Short, near vertical, rubber shock absorber legs stood between the wheels and the forward spar at the extreme edge of the wing centre section.