Thread: Discussion Plank 101
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Old Sep 30, 2012, 03:44 AM
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Just call me crash for short
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United States, OH, The Plains
Joined Jan 2011
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Originally Posted by Stupot46 View Post
Now that first one is nice!
Is the thinking behind the fin design to keep the drag "lower"?
Yea, I kind of liked that first one my own self. As to the fin, on SAL and DL type gliders, there is a lot of force being put on the fin/rudder during launch. I have blown off more than a few tails when I started in building DLG's, that and cracked tail booms. From the looks of the tail Kent has drawn, to hard of a discus launch will put a lot of stress on the joint where the fin meets the boom. That's why you see the vertical tail surfaces on DLG's above and below the boom in almost a balanced side loading. With all the surface on top, it has to be very, very strong or it will fold over like a wet noodle or twist the boom till it cracks.

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Last edited by Quick61; Sep 30, 2012 at 03:51 AM.
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