Steam brig
A steam brig is a two-masted sailing ship with auxiliary steam power. The advantage was supposed to be that the ship could sail up-wind when it was convenient, and additionally, it could use the steam power to move relative to the wind to obtain a more advantageous angle to the wind.
In practice, the disadvantages combined rather than the advantages. The type had great wind-resistance, leading to an increased use of fuel up-wind compared to a pure steam ship. At the same time, the requirement to store coal reduced the cargo space over that of a sailing ship. It thus combined the slow speed, high maintenance and poor righting of a sailing ship with the small cargo space and fuel expense of a steam ship.
