In early 1938, a floatplane variant RWD 17W was designed, differing among others in a more powerful 160 hp (120 kW) Bramo Sh 14a radial engine.

Next, 5 RWD 17Ws were ordered for the Polish Naval Aviation Squadron (MDLot) at Puck, for use as trainers, built in 1939.

In early 1939 a new wing for the RWD 17 was developed, slightly longer, with thinner profile and narrowing wingtips.

RWD 17s were flown by the Polish Aero Club and an aviation school in Świdnik before World War II.

On 30 September the aircraft attempted to evacuate to Sweden, however due to engine trouble it crashed in the sea near the peninsula, (the crew was saved).

Mixed construction braced high-wing (parasol wing) monoplane, conventional in layout, single-engine, with open cockpits.

Swept rectangular two-part wing, of wooden construction, covered with canvas and plywood in front, two-spar.

Wooden construction braced empennage, covered with plywood (stabilizers) and canvas (rudder and elevators).