The DAR (Dalnii Arkticheskii Razvyedchik – long range Arctic reconnaissance), was a twin-engined flying boat designed and produced in the USSR from 1934.

In 1934 Roberto L. Bartini was assigned to the ZOK NII GVF (Zavod Opytno Konstrooktorskoye Naoochno-Issledovatel'skiy Institoot Grazhdanskovo Vozdooshnovo Flota — Factory for Special Construction at the Scientific Test Institute for the Civil Air Fleet), to lead the design of the DAR.

Built entirely of Enerzh-6 stainless steel, the DAR closely resembled the Dornier Wal, with a high length to beam ratio hull, sponsons either side of the hull, strut supported parasol wing and twin engines in a single nacelle in the centre of the wing.

Initially Bartini intended the two engines to drive separate propellers running in a tubular shroud, much like a modern ducted fan; Tests at TsAGI (Tsentrahl'nyy Aerodinamicheskiy i Ghidrodinamicheskiy Institoot - central aerodynamics and hydrodynamics institute) confirmed Bartini's theories but the prototype was completed with a conventional tandem tractor/pusher engine nacelle.

Apart from the 'Enerzh-6' construction material, the DAR had several other innovations, including; full span slotted flaps, and pivoting wing-tip ailerons which were in two sections, fore and aft.