 Conversion was completed in 1938 and the flight trials proved the stability and manoeuvrability of the tri-cycle undercarriage during extensive taxiing trials, (landings and take-offs were carried out with the nosewheel steering locked).The fate of the RWD 20 is unknown but it did not survive WWII.Six RWD 9s were used by the Polish Challenge team, while the remaining two were ordered by the Czechoslovak team (OK-AMC, -AMD).