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Search found 1498 matches

by Walter
Mon Jul 22, 2019 3:20 am
Forum: Flycasting Physics
Topic: Lift force acting on a fly line
Replies: 321
Views: 17993

Re: Lift force acting on a fly line

Gordy,

Sorry my last couple of responses have sucked. I’m in very spotty internet for the next while and can’t be more helpful.

Walter
by Walter
Sun Jul 21, 2019 6:06 pm
Forum: Flycasting Physics
Topic: Lift force acting on a fly line
Replies: 321
Views: 17993

Re: Excellent FP on modeling

It is not applicable to a fly line IMHO. Merlin, I see it the same way although there is certainly a drag force in the -x direction that is associated with the lift force in the +y direction. As the tilt angle of the line increases the +y lift to -x force ratio will decrease. There is no free lunch...
by Walter
Sat Jul 20, 2019 6:42 pm
Forum: Flycasting Physics
Topic: Lift force acting on a fly line
Replies: 321
Views: 17993

Re: Excellent FP on modeling

You’ll find squillions of results for one and only one for the other. Walter, If that is the case then explain to me how "lift induced drag" applies to the wind gauge experiment? I don't even see how it applies to a dropped piece of line if that is one of the squillions of results you are talking a...
by Walter
Sat Jul 20, 2019 3:19 pm
Forum: Flycasting Physics
Topic: Lift force acting on a fly line
Replies: 321
Views: 17993

Re: Excellent FP on modeling

lift induced drag is the correct term but it is different to DOG Graeme, Could you (or Vince) explain why lift induced drag is the correct term and drag induced lift is wrong? At first glance that seemed to be a: A Distinction without a Difference A distinction without a difference is a type of log...
by Walter
Sat Jul 20, 2019 1:56 pm
Forum: Flycasting Physics
Topic: Excellent FP on modeling
Replies: 45
Views: 5033

Re: Excellent FP on modeling

I thought I just did. :upside:
by Walter
Sat Jul 20, 2019 1:21 pm
Forum: Flycasting Physics
Topic: Excellent FP on modeling
Replies: 45
Views: 5033

Re: Excellent FP on modeling

It was the same with the unrolling loop. It was either momentum only or an acceleration from the shortening of the fly leg (/momentum change at the loop). Why is it momentum change at the loop? The fly leg has momentum and energy. Conservation of energy explains the acceleration. Losses due to air ...
by Walter
Sat Jul 20, 2019 1:04 pm
Forum: Flycasting Physics
Topic: Excellent FP on modeling
Replies: 45
Views: 5033

Re: Excellent FP on modeling

I cannot clearly identify the models you mention and who runs them. I know a couple of models in the academic range: Gatti Bono and Wang. Hi Merlin, I guess it depends on whether you think Newton’s laws are a model, calculation, simulation or imagination for the description of objects in motion.
by Walter
Sat Jul 20, 2019 3:35 am
Forum: Flycasting Physics
Topic: Excellent FP on modeling
Replies: 45
Views: 5033

Re: Excellent FP on modeling

In general I think this paper fails to prove or show the conclusion that drag induced lift has any influence on distance, but I think it's something for a separate topic, where I'll review this paper. From the paper in question (Section 3: Example and Conclusions): This note explains a fact observe...
by Walter
Fri Jul 19, 2019 2:38 pm
Forum: Flycasting Physics
Topic: Excellent FP on modeling
Replies: 45
Views: 5033

Re: Excellent FP on modeling

To make it short (see post #2 in the “Thank you” thread), a model is just a tool and must be fit for purpose. In my case they are built to allow comparing situations, identify trends which can be understood (in the sense of physics), and not to make accurate predictions. https://www.sfu.ca/~vdabbag...
by Walter
Fri Jul 19, 2019 7:53 am
Forum: Flycasting Physics
Topic: Miscellaneous (bead chains, string shooter, whips)
Replies: 39
Views: 3612

Re: Miscellaneous (bead chains, string shooter, whips)

Isn't this a great topic title? Any sex shop owner would be impressed. I've cleaned a bit up, because it got really OT. I don't know if I've done the best of surgery, but tried to keep postings close to the topic. Please open up a new topic next time or post in the right topic (e.g. stringshooter i...

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