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Search found 242 matches

by Torsten
Mon Jun 28, 2021 7:11 pm
Forum: Flycasting Physics
Topic: Tension Discontinuity /DN
Replies: 31
Views: 1151

Re: Tension Discontinuity /DN

In my opinion, the simple 1-D model with the semicircular front is not suited for describing morphing or pointed loops like shown in Pauls picture. The reason are some model assumptions, like the straight legs or the semicircular shape, the line is not constrained to such a shape, even not if you're...
by Torsten
Sun Jun 27, 2021 12:30 pm
Forum: Flyfishing
Topic: searching for DT #4 & #5 floating lines
Replies: 23
Views: 748

Re: searching for DT #4 & #5 floating lines

Yes, this is true, I still have 20+years old shooting heads, now and then you need to replace a loop, otherwise not much issues with cracking & co. Shooting lines don't last that long for me, but are usually cheap & easy to replace (if they're mono lines). But shooting heads are not always ideal, es...
by Torsten
Sat Jun 26, 2021 9:36 pm
Forum: Flyfishing
Topic: searching for DT #4 & #5 floating lines
Replies: 23
Views: 748

Re: searching for DT #4 & #5 floating lines

100 days with the chinese DT sounds pretty good for me. Most lines failed earlier for me, maybe because I'm fishing from the bank with lots of mud, grit involved and if fishing is too boring I'm doing some casting for fun. I've looked into some older catalogues - for the top lines from Rio: 2009/10 ...
by Torsten
Sat Jun 26, 2021 12:25 pm
Forum: Flyfishing
Topic: searching for DT #4 & #5 floating lines
Replies: 23
Views: 748

Re: searching for DT #4 & #5 floating lines

Hi Lasse, that's a good question - my two MED look still good, but I've used them only a few times in Tallinn and a little practise (I rarely cast full lines in tournament, our castingsport management does not support fly casting with standard gear). But I remember that Bart has reported trouble wit...
by Torsten
Sat Jun 26, 2021 10:28 am
Forum: Flyfishing
Topic: searching for DT #4 & #5 floating lines
Replies: 23
Views: 748

Re: searching for DT #4 & #5 floating lines

Hi Paul, the SA Amplitude DT is here sold for 140€ :) .. really if the prices are rising further I'm sure fly fishing is something for the "rich & famous" only .. The best DT that I've used was the 444SL from Cortland, but they don't make them anymore. I'd say the coating of the Cortlands was always...
by Torsten
Mon Jun 21, 2021 6:41 pm
Forum: Flycasting Physics
Topic: Tension Discontinuity /DN
Replies: 31
Views: 1151

Re: Tension Discontinuity /DN

For a single particle we can assume a combination of translation and rotation (like a rolling wheel) - that's why you're getting such a trajectory. A larger radius means that line more segments are exposed to form drag and thus have larger losses. So I'd still expect that this model produces plausib...
by Torsten
Fri Jun 18, 2021 6:38 pm
Forum: Flycasting Physics
Topic: Tension Discontinuity /DN
Replies: 31
Views: 1151

Re: Tension Discontinuity /DN

Hi Paul, in this case Daniel has used the simple 1-D fly line model which consists of a straight fly leg, a straight rod leg and a semicircular transition (the loop front). Other authors made the same assumptions, I think there is a paper from Perkins/Gatti-Bono with the same subject. I think the al...
by Torsten
Fri Jun 18, 2021 6:09 pm
Forum: Flycasting Physics
Topic: Wide Loop Inifficiency?
Replies: 21
Views: 1504

Re: Wide Loop Inifficiency?

Hi Graeme, A tight loop is an indication that you've focused the energy correctly. For me, the proof of that is that a wide loop will become narrow of its own accord ("morph"), but only if you focused that energy. If you didn't, the loop remains wide and may even fail. I think you mean rather the to...
by Torsten
Thu May 06, 2021 7:50 pm
Forum: Flycasting
Topic: Sloppy Rod
Replies: 128
Views: 8305

Re: Sloppy Rod

Hi Paul, I broke a 4wt Snowbee this way (many years ago) while trying to carry 90ft.+ of a DT - broke also shortly above the handle. Perhaps you could take a few pictures of the broken blank the next time you break one. Incidentally Magnus, I think that the modulus of the 3WT you brought down is ver...
by Torsten
Thu May 06, 2021 7:38 pm
Forum: Flycasting
Topic: Sloppy Rod
Replies: 128
Views: 8305

Re: Sloppy Rod

Hi James, So you've taken a random rod and decided that because you can bend it by hand my results are somehow invalid, hmm indeed! I've not written that your results are invalid, rather I'm wondering how to interpret them. The deflection at break seemed to me subjectively quite small (of course I c...

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