| Summary: | The aerodynamic characteristics of archery arrows fletched with two types of straight vanes, for which the area is different, were studied. The arrows’ pitching moment (<i>C</i><sub>M</sub>), lift (<i>C</i><sub>L</sub>) and drag (<i>C</i><sub>D</sub>) coefficients were measured in the 60 × 60 cm Magnetic Suspension and Balance System (MSBS) from JAXA. At a Reynolds number of Re = 1.2 × 10<sup>4</sup>, the values of <i>C</i><sub>D</sub> were 1.56 and 2.05 for the short and large vanes, respectively. In a second experimental procedure, the arrows’ deceleration in free flight was measured by inserting an acceleration sensor inside their shafts. For shots with an initial velocity of around 56.4 ms<sup>−1</sup>, a velocity decay of around 8% was measured. A turbulent–laminar boundary layer transition during free flight was found for shots with an average Re = 1.8 × 10<sup>4</sup>. Lastly, through numerical computations, the area difference of the two vanes was analyzed to verify the importance of <i>C</i><sub>M</sub> and <i>C</i><sub>L</sub> during the arrows’ flights.
|
|---|
