The Impulse is an Australian sailing dinghy that was designed by Arthur Caldwell as a one-design racer and first built in 1975.

[1] The design was originally intended as a wooden boat for amateur construction, but has more recently been manufactured of fibreglass.

It has a catboat rig, a raked stem, a vertical transom, a transom-hung rudder controlled by a tiller and a retractable centreboard.

[1] The boat has a draft of 2.00 ft (0.61 m) with the centreboard extended and 3 in (7.6 cm) with it retracted, allowing beaching or ground transportation on a trailer or car roof rack.

[1] The boat is supported by a class club, the Australian Impulse Sailing Association, which organizes racing events.