Invention Grant
US07955201B2 Spin element for arrow or bolt 有权
箭头或螺栓的自旋元件

Spin element for arrow or bolt
Abstract:
An arrow element, such as an insert and/or sleeve, mounted with respect to a shaft with at least one airflow resistor projecting outward from the insert to impart rotational spin about a longitudinal axis or spin axis arrow during flight, to increase aerodynamic performance and stability of the arrow shaft, and to improve arrow flight accuracy.
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