Forums: Skydiving Disciplines: Swooping and Canopy Control:
Aerodynamics of the FR turns

 


unkulunkulu  (D License)

Aug 5, 2013, 12:22 AM
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Aerodynamics of the FR turns Can't Post

Is there an extensive explanation of the FR and harness turns? I think I understand the brake turn with the pendulum effect caused by the body weight inertia, but with FR and harness I fail to understand a bit.

Hopefully, the explanation also shreds some light on the behavior described in this thread: http://www.dropzone.com/...;;page=unread#unread


(This post was edited by unkulunkulu on Aug 5, 2013, 3:34 AM)


DocPop  (C License)

Aug 5, 2013, 6:36 AM
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Re: [unkulunkulu] Aerodynamics of the FR turns [In reply to] Can't Post

unkulunkulu wrote:
Is there an extensive explanation of the FR and harness turns? I think I understand the brake turn with the pendulum effect caused by the body weight inertia, but with FR and harness I fail to understand a bit.

Hopefully, the explanation also shreds some light on the behavior described in this thread: http://www.dropzone.com/...;;page=unread#unread

I will have a stab at it:

FR turn:

When you pull on a FR you decrease the angle of attack of one side of the wing. This causes a decrease in lift and an imbalance with the other side of the wing. This imbalance causes a roll which initiates a turn. The decreased AoA/reduction in vertical lift vector means that it is a diving turn.

Harness turn:

Similar to a FR turn, harness input causes an increased loading on one side of the wing which reduces the vertical lift vector and causes a roll and subsequently a turn. Since there is no increase in drag or distortion of the wing, it is a very clean turn.



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