Loop "Lift" & Loop "Fall" /

For those interested in a couple of very detailed physics papers, I have included two attachments. The first deals with a kind of "lift" of the fly line loop related to drag (Nothing to do with an airfoil). The second attempts to show how drag forces can slow the fall of the loop.

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Phil and Gordy,

Just read the article entitled, "Effect of Loop Shape on the Drag Induced Lift of the Fly Line"

by Caroline Gatti-Bono and Noel Perkins. Worth wading through.

I am wondering if the climbing loop has more to do with angle-of-attack, to use the kiss principle, when riding in a car as a young lad with hand held flat in the air stream all it took was a slight turn upward of the hand for the airstream to lift my hand with noticeable force.

May be it is the same principle as a symmetrical airfoil as on a Aerobatic aircraft such as the Decathlon--wing designed for better inverted flight. This aircract flies with ease right side up or inverted. Do not know about Military fighters.

Anyway, that is my two cents for now in trying to make sense of a climbing loop. My goal is understanding!

Jerry Puckett

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Jerry.. That paper had absolutely nothing in it which in any way related to the kind of "lift" generated by an airfoil. It related the shape of the loop to drag on the fly line to give the effect of "lift". Lift in this sense, I interpreted to mean ELEVATION. Not the kind of lift which occurs with aircraft at all.

I don't know much about military OR civilian aircraft, but I'd bet you'll agree that the basic principles of flight would remain basically the same. Not so for the fly line.

Gordy

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From Liam Duffy:

Hi Gordy,
Phil Gay has (as usual) hit the nail on the head. I fully agree with him, lets put it to bed before we "flog" it to death!
Best Regards,
Liam Duffy

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Liam... One reason for re visiting this about once each year, is that it the mystique of the CLIMBING LOOP keeps coming up along with theories and misconceptions. It cannot be beaten to death and won't die a natural death. I've even noted it brought up on a Master's exam ! G.

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