The i550 is a fast modern sharpie type hull shape owing its roots to the historic sharpies of Long Island Sound. The sharpies were known for their speed and seaworthiness, the i550 picks up where they left off. It fits in with the sportboats speeds and ability to plane off the wind.
It is a simple design for stitch and glue construction using 1/4″ (6 mm) marine ply, epoxy and fiberglass. Quite a few have been built in North America and Australia, Croatia, Russia, Brazil and 15 other countries.
There is a builders group at i550class.org and numerous Youtube videos. It is a welcoming group and has a wealth of knowledge to share.