The Gnome-Rhône 7K itself was an enlarged version of the
Gnome-Rhône 5K which was derived from a licensed version of the
Bristol Titan. A redesign of the cylinders is indicated by the K suffix. The 9K was followed by the larger and more powerful 14-cylinder twin row
Gnome-Rhône 14K. The 9K was license produced by Hungarian company
Weiss Manfréd Repülogép- és Motorgyár Rt. (WM Rt, the aircraft engine factory of Manfred Weiss). The 9K was also produced in the Soviet Union as the M-75 at
GAZ-29 in
Zaporozhye. Only small numbers were built and it was dropped in favor of the
M-25, a version of the
Wright Cyclone and the M-85, a version of the
Gnome-Rhône 14K Mistral Major. ==Variants==