One disadvantage of earlier Ground Effect Craft was the fact, that the take off from water required by far more engine power, than the operation in Ground Effect during cruise.

To make Ground Effect Craft commercial feasible, one of the most important targets was to reduce this take-off drag by having a take-off-aid. The R&D work of Fischer Flugmechanik were heavily sponsored by the German Ministry for R&D (BMB+F)and led to an air-cushion supported design, in which a part of the propeller slip-stream is taken during take-off, and guided under the Katamaran fuselage to build up a static air cushion, which creates already 80% of the crafts weight as lift, while speed is still 0.

Further advantage of the Hoverwing Technology is the fact, that after take-off, the air inlets behind the propellers are closed, and the full thrust is available for cruise. Thus the Hoverwing Technology is the bridge between ACV and WIG craft.