Pterosail Trike Systems is sailing and cycling over 3,000 miles from coast to coast across the USA this summer. The Pterosail is a street-legal recumbent tricycle with sails. It can reach up to 40 mph in good winds. No wind? Pedal. See also: the Whike, a Dutch made sail assisted trike. Related: Guido Vigevano's wind car / Sailing rockets / Kiteboating / Velomobiles.