 Each mainwheel was on a half-axle and a radius rod, each hinged on the lower fuselage longeron, with a shock-absorbing oleo strut attached to the forward wing strut at a point where it was strengthened by a strut to the rear wing strut base and another to the upper longeron.For ease of transport, the R-X's wings could be folded back flat alongside the fuselage, leading edges down, once the tailplanes had been folded upwards.The pre-series R-Xs were used by the Polish Air Force from 1929 as liaison aircraft and staff transports.