Fletching and the Crossbow Arrow

Vanes are glued (fletched) to the arrow (also called bolt) shaft in three distinct positions in relationship to the linear center line of the shaft. Their purpose is to steer the arrow to its intended target. There are three distinct fletching methods commonly used. Let's look at each method and discuss their pros and cons.

Offset is the preferred fletching style of most crossbow hunters.

Straight Fletching

A straight fletch has the vanes mounted in perfect linear alignment to the center line of the shaft. Typically, this fletch style produces the lowest drag (air resistance) in flight, allowing the arrow to maintain a flatter trajectory over the course of its flight to the target. However, it is not in the crossbow hunter's best interest to employ this style of fletching when shooting broadheads. Broadheads have a larger surface area than field points and will tend to steer the arrow. A straight fletched arrow will be less likely to control it.

Offset Fletching

An offset method of fletching means the vane is offset to the linear direction of the arrow's centerline. The vane is actually laid in a straight line, but simply placed at a slight angle anywhere between one and four degrees to the linear run of the arrow. This method, in conjunction with the angle of offset, will impart a certain degree of drag on the vanes and better control the arrow. This is the preferred fletching style of most crossbow hunters.

Helical Fletching

A helical fletching is placed in a spiral orientation on the shaft of the arrow, in effect winding its way around the shaft. The helical method of fletching is generally considered as the most effective and causes the arrow to rotate, somewhat like a rifled bullet. Often times a helical fletch is not practical to use in crossbows. With the radical twist of the vane, the vane itself will come in contact with the arrow channel as it is pushed down the rail. This can lead to erratic arrow flight.

Points to Remember

• Vane characteristics will change with temperature conditions, cold temperatures making them stiffer, hot conditions making them more pliable and soft. You should shoot them in both extremes and note any changes in flight characteristics.
• The direction you offset when fletching makes no difference with crossbows.
• Too much offset or helical can be detrimental to arrow flight in crossbows, causing reduced downrange velocity and accuracy.