Model classes with internal combustion engine

FSR-3.5V (according to NAVIGA), E-3.5 (according to IMBRA). Engine displacement up to 3.5 cm.

FSR-7.5V (according to NAVIGA), E-7.5 (according to IMBRA). Engine displacement up to 7.5 cm.

FSR-15V (according to NAVIGA), E-15 (according to IMBRA). Engine working volume up to 15 cm.

FSR-27V (according to NAVIGA), E-27 (according to IMBRA). Engine displacement up to 27 cm

In all classes of internal combustion models: propeller under the bottom, body of free construction, monocoque (body of one part). The duration of the race is 20 minutes, in the semi-finals and 30 minutes in the final. Up to 14 participants can swim in the semi-finals and finals. Envelope-shaped swimming track 100x50m.

Another option is available in the FSR-3.5st., (E-3.5st.) class. Swimming course envelope-shaped 60x15 m., swimming time 15 minutes. A maximum of 8 participants can swim in the semi-finals and finals.