Racing spinnaker for sailing boat

摘要

The racing spinnaker has its top fixed to the mast and bottom to a boom and a sheet. Between the upper (5) and lower (4) regions, there is at least one aperture (8) which is horizontal when the sail (3) is set. Within this aperture there is at least one lift wing (10) with aerodynamic profile, arranged so that there are through apertures above and below it for the air flowing past it. The spinnaker may be fitted to a stay and a second boom.