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#36
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Todd Pattist wrote:
.. We're not talking about a "turn," but rather a pullup from nose down attitude. You can't really compare the situation where gravity imposes 1 g to the case where the g-load is not externally imposed. ... A similar effect arises even in this situation: when the lift is reduced due to the extended brakes, the radius of curvature increases. By rotational inertia the glider will tend to keep the same rate of rotation around the pitch axis, so that the AOA increases, i.e. the g-load increases and the radius of curvature decreases. Of course the rotational inertia will not have a total success in trying to keep the rotational rate, as the AOA increases this also changes the AOA at the tail plane, providing the moment which is going to reduce the rotational rate. However the radius obtained in this way is not what would be obtained by just reducing the lift, there is still a (partial) load transfer to the wing tips. |
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