Impulse 21
The Impulse 21, built by Impulse Marine Inc is an American trailerable sailboat that was designed by William E. Cook as a one-design racer and day sailer, It was first built in 1986.
Production
The design was initially built by Impulse Marine in the United States. After the first 10-12 boats were completed, it was then built under contract by Johnson Boatworks on behalf of Impulse Marine. A total of 150 boats were completed, but it is now out of production.Design
The Impulse 21 is a recreational keelboat, built predominantly of fiberglass, with a Klegecell core. It has a fractional sloop rig, a raked stem, a cut-out, walk-through, sharply reverse transom that allows ease of boarding, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel. It displaces and carries of ballast.The boat has a draft of with the standard keel.
The design has only a small cuddy cabin for sail and cooler stowage and no sleeping accommodation.
For sailing the design is equipped with a cockpit that is long. It has a launcher tube for a spinnaker of and a self-tacking jib. The boat is equipped with foam-fill compartments for buoyancy.
The design has a Portsmouth Yardstick D-PN racing average handicap of 183.