Understanding Fly Line Design with Zach McKnight
Wet Fly Swing Fly Fishing Podcast
Dave Stewart
4.7 • 530 Ratings
🗓️ 12 February 2026
⏱️ 57 minutes
🧾️ Download transcript
Summary
Show Notes: https://wetflyswing.com/882b
Sponsors: Fly Fish with me Utah, TroutRoutes, and On DeMark Lodge.
Fly fishing has a way of making simple problems feel complicated. Your cast feels off, the presentation isn't doing what you want, and suddenly you're blaming everything in your hand.
In this episode, we dig into understanding fly line design with Zach McKnight from Cortland Line, and it's one of those conversations that can instantly clear the fog. Not by piling on more jargon, but by getting back to the one connection that quietly drives everything: rod to line to fly.
We also get into a little company history, why Cortland is working hard to be "the Cortland your grandpa remembers," and where fluorocarbon actually makes a difference when the water is clear and the fish are spooky.
Transcript
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| 0:00.0 | Fly fishing has a way of making simple problems feel complicated. |
| 0:07.9 | Your cast might feel off, presentation might not line up right, and progress stalls. |
| 0:13.9 | Even though nothing obvious seems wrong. |
| 0:16.0 | In many cases, the issue isn't the rod or angler at all, but the connection between them. |
| 0:20.2 | And the connection is what |
| 0:21.3 | today's conversation is really all about. Today's guest works for Cortland Line, a company that has played |
| 0:26.2 | a major role in shaping modern flyline design for more than a century. Today we're going to get |
| 0:31.4 | into a perspective that blends time on the water with a deep understanding of how flylines are |
| 0:36.5 | actually designed, built, |
| 0:37.7 | and matched to rods and why those decisions quietly affect everything that happens once the fly |
| 0:42.9 | leaves your hand. This is the Wet Fly Swing podcast where I show you the best places to travel |
| 0:47.3 | to for fly fishing, how to find the best resources and tools to prepare for that big trip, |
| 0:51.9 | and what you can do to give back to the fish species we all love. |
| 0:55.4 | Zach McKnight is here to dig into fly lines from a practical angle, cutting through all the |
| 1:00.6 | confusion and focusing on what actually matters in fly fishing. In this episode, you're going to |
| 1:06.5 | hear how flyline taper and weight influences casting feel and control. Why many common casting issues start with line choice and actually not technique and how to |
| 1:16.3 | think clearly about matching rods and lines for real fishing situations. |
| 1:20.5 | Plus, we're going to find out where floral carbon makes a difference and where you should |
| 1:24.3 | be using this and thinking about today. |
| 1:26.2 | Lots of great history, including a little shout out to Anheiser-Bush. Love this little story we take on the way. All right, here we go. Let's get into it. Zach McKnight. You can find him at courtlandline.com. How's it going, Zach? Going good, Dave. Happy to be here. Yeah, good to have you on here. I love doing the chat, especially with some of the brands that have been out there for long time. I think Cortland, I'm not sure who's got you beat, but 1915, you know, you've got to go back a long ways. I know on my history, I've talked about this before, but from my very young childhood, I've been, you know, using Cortland products. I remember the, I think everybody talks about the 444, right? The peach line and stuff, but... Yeah, the beach, yeah. |
| 2:04.7 | The peach line and stuff, but yeah, the beach. Yeah, the peach. It's pretty classic. But we're going to get a whole update on Cortland. We're going to talk about what's been, what's new products, what you guys are focusing on. Before we get in all that, let's take it back to just your background. Have you been fly fishing for a while? Are you kind of new to this? What's your first memory? I have. I actually have. I've got a pretty unique story with fly fishing. And it's just it has it is a deep-rooted affinity with Cortland actually. And it's quite funny. So I've been fly fishing since I was 10 years old. Now I was also an athlete, so I played a lot of sports. |
| 2:39.8 | So I didn't get to fly fish as much as I liked growing up. But it was actually my grandpa who got me into fly fishing. |
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