[8] Ryan Aeronautical Company acquired the design in the summer of 1947, launching production at its San Diego factory in 1948.

The Rangemaster G replaced the sliding canopy of the earlier Navions with a more conventional five seat cabin with access via car-type doors.

It was thought that wartime pilots would come home and continue flying with their families and friends under more peaceful conditions, but the postwar boom in civilian aviation did not materialize to the extent the manufacturers envisioned.

[8] During the Korean War, the US Army's Navions added casualty evacuation and forward air controller to the aircraft's liaison and light transport duties.

On 18 March 2003 Sierra Hotel Aero Inc of South St. Paul, Minnesota purchased the type certificate,[15] design data, molds and tooling.