Doing for a long time, the construction and operation of velomobiles (was a prize winner of all-Union velofestivalya in šiauliai), I was convinced of their lack of practicality. The large size of the velomobile exclude the possibility of its storage in the apartment. Known foldable construction is complicated to manufacture and quite cumbersome. Used them on wheels, usually a Bicycle, not designed for the lateral loads experienced by the velomobiles on the bends.
The desire to reduce the dimensions of the recumbent assembled led to the idea of creating a vehicle based on a bike with a side trailer. Such structures are known, but they exhibit the same drawbacks as the velomobiles, since the trailer is rigidly mounted them to the bike. In the developed embodiment, the side folding trailer; it is equipped with a horizontal hinge in the plane of symmetry of the Bicycle, connected to them using quick disconnects. Another feature consists in fixing trailer wheel on the console vertical hinge (piano type).