Mainsail Boom Vang

mainsail boom vang

When your mainsail is hoisted and filling it will naturally try to lift your boom – the vang holds the boom down. as a result your vang directly limits the amount of twist in your mainsail. as we transition from upwind, to reaching, to downwind, in various wind conditions – the vang’s role changes and becomes more, or less, important. A boom vang is used on a sailboat to pull down the boom on off-wind points of sail when the wind in the mainsail would lift the boom. proper use of a boom vang helps keep the sail full and drawing well. Boom vang. if we are sailing upwind on board a normal cruiser, the use of the boom vang is almost non influential. on the contrary, when a boat sails downwind, the boom vang plays a decisive role in controlling the shape of the mainsail since it affects twist according to its position (more twist when it is eased, less twist when hauled) while the sheet determines the orientation of the sail.

Conventional mainsail reefing | the rigging company

Roller furling and reefing systems - sailboat rigging

mainsail boom vang The boom vang takes over the job of pulling down on the mainsail clew and controlling twist when the boom is eased out for off-wind sailing. just as you would with the mainsheet upwind, use enough tension on the boom vang to keep the top batten parallel to the boom. upwind in light to moderate conditions, the vang is not used and is simply kept. Controlling the boom height determines twist, or the shape of the mainsail leech. if you don’t use the boom vang in all but the lightest conditions, the boom will rise up as it is eased out and the sail will twist off, spilling power out of the top of the sail.