Kinematic changes with increased mass
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Kinematic changes with increased mass. A, Vertical component of aerodynamic forces balances weight, while the lateral component provides for the centripetal acceleration of the spinning seed. B, As mass increases, the autorotation frequency f1R increases and the coning angle (β) reduces. These changes result in a more vertically oriented and larger aerodynamic force to balance the increased weight, allowing the descent speed V to remain nearly constant.
创建时间：
2014-11-07
