Download plan price gbp55.00 . paperplan price gbp95.00. the pixie below is sailing in peru. the facts and figures. sheet ply stitch and glue. Design software: aerohydro (marine design and modeling software and services) aerologic (lofting, simulation and analysis software) aeromarine research (tunnel boat. The ‘a’ class catamaran – its place at the top table. at 18ft long with a total allowed rig area of 150ft2, but weighing in at a mere 75kg, the ‘a’ class is.