A Fly Casting Model for Instruction

Technique — December 26, 2010 — 8 min read — Updated June 9, 2026

A Fly Casting Model for Instruction

A fly casting model gives instructors and students a shared universal language for describing every element of the fly cast — casting stroke, overall stroke, loop formation, line positioning, and force application. Mac Brown contributed to this collaborative model alongside global casting instructors and has applied it in teaching since 1987 in Bryson City, NC. The model works for all casting styles including single-hand, switch, and Spey — and is powerful precisely because it avoids rigid rules in favor of universal principles.

Back to Blog
A Fly Casting Model for Instruction

The fly casting model for instructing fly casting includes concepts for teaching all the components of general movements. These comments are a compilation of several colleagues who invested considerable time and thought into defining a working model of fly casting. I believe this model is powerful because of its universal application for instructors globally.

The beauty of this approach is its simplicity in application. Generally, I have been opposed to rigid rules in fly casting because they almost always break down. Even today, many of the so-called establishment groups in fly casting still cling to antiquated rules. As the ever-changing casting community pushes boundaries for future generations, those holding fast to rules will fall light years behind in short order. What's more ironic is that "rules" often work for some things but fall short in other areas.

Terminology for the Model of Fly Casting

This model is different because the terms are not rigid rules set in concrete. That makes it much easier for me to accept and apply when talking with other instructors. When I first learned about it last winter, I worked through most of the fishing casts I use on the water, and it was a fun exercise to apply the model below to each cast. Thanks to Lee Cummings for explaining many of them in greater detail. The terminology applies equally well to both linear casters and free-form casters (straight line and three-dimensional casters).

Fly casting is a three-dimensional sport. Most problems today stem from straight-line casters who still adhere to straight-line rules—the "world is flat" thinkers who still believe casting is two-dimensional, fitting nicely into linear thinking. Three-dimensional casters—those who understand the world is round and learn to cast in three dimensions to deal with obstacles—are out there doing and teaching the fishing casts because that's reality-based casting. This group tends to be artists, musicians, or what many call the poets of fly casting.

Casting is Three-Dimensional

How can we expect linear thinkers to join the poets? This dimensional jump will be difficult for them because it pushes them out of their comfort zone. If you fall into the linear category, you cannot and likely will not change your thinking on straight-line casting. All we can do is maybe convert a few along the way by making them curious. We do that by demonstrating casts that solve problems on the water while fishing. That's the biggest obstacle to changing the guard here in America and, I imagine, around the globe.

Some are totally fluent with circles and eights for exercises because they've abandoned rigid rules. The model below works great with all of the Spey casts for change-of-direction casts. I think the free-form casters are much more exciting to watch because they push right to the edge of extreme timing to solve positions on the water.

Sexyloops Fly Casting Model

There is a forum thread at Sexyloops on this very topic that started today. My friend Paul Arden opened up the discussion by describing qualitative versus quantitative observations regarding the model. The similarities between qualitative observations for the poets and quantitative observations for the linear folks were shocking after I read his opening post. I would have thought Paul was in my kitchen writing the thread!

He composed it at the same time I was writing this introduction. I've been ready for the casting revolution for a long time now, and it's all about to happen! Instructors from around the globe will use a similar model for teaching approaches. Work through the terms until you can apply them to all the casts you know. Enough rambling—enjoy the model!

THE FLYCASTING MODEL

An introduction to the definitions:

Magnus Angus, Paul Arden, Lee Cummings, Ben Dixon, Grunde Løvoll,

Stefan Siikavaara, Walter Simbirski, Mark Surtees

Our objective was to define a set of terms we can use to isolate and describe the elements that go together to make fly fishing casts. Wherever possible, we have used terms as they are already used by instructors and professionals within the fly fishing community.

Overall Stroke and Casting Stroke

To differentiate between actions whose purpose is to position the rod and/or line and those whose purpose is to apply force to the line to make a loop, we need a distinction between a Casting Stroke and an Overall Stroke (or just Stroke). The Casting Stroke covers only those motions whose purpose is to apply force to the line to generate a loop. The Casting Stroke has one crucial result: a loop of line.

An Overall Stroke includes a Casting Stroke and those motions needed to position the rod or line before and after the Casting Stroke.

We have retained the conventional meaning of Casting Arc, which measures the change of rod angle at the rod butt during the Casting Stroke.

There is no obvious reason to change the generally accepted meaning of Stroke Length. However, we felt we needed to make the length of the Casting Stroke explicit, so we have coined the term Casting Stroke Length to mean rod translation during the Casting Stroke.

We are aware of the debate around the contribution of rotational and translational components of the Stroke and Casting Stroke. So, without prejudging the debate, we have introduced the term Drag to mean rod translation with little or no rotation during the early part of the Casting Stroke. The inclusion of Drag does not preclude any argument being right or wrong regarding power, but it does preclude a set of definitions based on the premise that the argument has already been decided.

Component Parts of the Overall Stroke

An Overall Stroke includes a Casting Stroke and those motions that may be required to reposition the rod and line before and after the Casting Stroke. These components are divided into rod positioning motions (which have little or no effect on the line) and line positioning movements. While line positioning means moving the line, it does not involve forming a loop, so although line positioning movements must move the line, their purpose is not loop formation and they therefore fall outside of the Casting Stroke.

We have adopted the term Drift for rod positioning and Sweep for line positioning. Specific forms of Drift and Sweep can be named. For example, Slide—where the rod runs along the line toward the line hand without moving the line—is a form of Drift. Sweep is used often in the lift on a pickup and lay down, setting up a static D-loop, many motions in Spey casts, and aerial mends—all examples of Sweep.

One Fault Definition

We believe that in our fly fishing context, Creep is commonly understood as a fault, and we have defined it accordingly.

Conclusion

We believe these definitions will describe most, if not all, commonly used casts. The definitions are neutral on outcomes, meaning that the common fault-finding processes can be applied to each element, making the definitions not only descriptively powerful but also analytically powerful.

The soft boundaries between the component definitions reflect the judgment instructors in the field use when they seek to correct faults or offer advice to students. For example, what instructor would mistake rod repositioning (Drift) for a Casting Stroke?

The definitions retain the common understanding of the terminology used by most casting instructors. They do not require a re-education process for fly casting terms. Consequently, the terminology is more likely to be accepted by a broader base of instructors worldwide.

The Whole Cast

Stroke (or Overall Stroke): A coordinated series of movements that includes a Casting Stroke.
A Stroke starts when the rod hand first moves in the direction of the cast.

Casting Stroke: When the rod applies force to the line to form a loop.

Pause: The period between Casting Strokes.

THE CASTING STROKE

Casting Arc: Change of rod angle during a Casting Stroke.

Casting Stroke Length: Distance the rod hand travels during a Casting Stroke.

Drag: Rod translation during the early part of a Casting Stroke.
Drag establishes momentum in the direction of the cast with little or no rod rotation. (Not essential to all casting styles.)

Loop: A moving length of line delivered past the rod tip, formed when the rod tip curves the line under or over itself.

Static Loop: A length of line formed into a D under the rod tip.

Rod and Line Positioning

Drift: To position the rod between casting strokes.
Moving the rod to adjust Casting Arc, Stroke Length, or Casting Plane. Drift applies little or no force on the line.

Slide: A form of drift where the rod is moved along the line toward the line hand.

Sweep: To position the line.
Sweeping or pulling the line into position.

Mend: A form of Sweep after the Casting Stroke.
A mend may be made either while the line is in the air (aerial mend), when the caster moves the line in the rod leg of the loop, or later when the line has straightened or fallen.

Lift: An upward Sweep.
The primary purpose of Lift is to begin clearing line from the water prior to a further line positioning movement or Casting Stroke.

Faults

Creep: Unintentional movement of the rod in the direction of the next Casting Stroke.
Creep is a persistent casting fault where the rod is unintentionally moved so the Casting Arc and/or Casting Stroke Length of that cast are reduced.

Tags

Ben DixonCasting arcCasting StrokeCreepdragDriftFly Castingfly casting conceptsfly casting definitionsfly casting termsFlycasting Modelfree-form castingGrunde LovollLee CummingsLiftlinear fly castingMangus AngusMark SurteesMendPaul ArdenSexyloops ModelslideStefan SiikavaaraSweepthree dimensional castingWalter Simbirski

Frequently Asked Questions

What is a fly casting model?

A fly casting model is a structured framework of terms and concepts used to describe every element of the fly cast in a way that applies universally across all casting styles — single-hand, switch, and Spey. It distinguishes between a casting stroke (which generates a loop) and an overall stroke (which includes all rod movements). A good model gives instructors and students a shared language for diagnosing faults, discussing mechanics, and advancing skill without relying on rules that break down in real fishing conditions.

What is the difference between a casting stroke and an overall stroke?

A casting stroke covers only those rod motions whose purpose is to apply force to the line and generate a loop — it has one result: a loop of line. An overall stroke or just stroke includes all rod movements during the casting sequence, including positioning moves like lifts, sweeps, and mends that do not directly generate a loop. Keeping these two concepts separate is essential for accurate fault diagnosis and instruction.

Why do fly casting rules break down?

Most fly casting rules are observations about one style or situation that get applied universally where they do not belong. Rules about rod arc, elbow position, wrist involvement, and acceleration work in some contexts and fail in others — because style is personal and situation-dependent while mechanics are universal. A model based on principles rather than rules gives the caster and instructor tools that work across all casting planes, styles, and fishing scenarios.

How does the fly casting model apply to Spey casting?

The model works particularly well with Spey casts because it accommodates change of direction casts, constant tension casts, and the full range of anchor placement and D-loop positioning without forcing them into a single-hand framework. The distinction between casting stroke and positioning moves is especially valuable for teaching Spey — where most of the sequence is positioning before the actual delivery.

Where can I learn fly casting from an instructor who teaches from first principles?

Mac Brown Fly Fish in Bryson City, NC offers private fly casting lessons, the Fly Casting Mastery Workshop, and the week-long Fly Fishing Guide School — all taught from first principles using the universal casting model. Led by Mac Brown, the only FFI Master Casting Instructor in North Carolina, since 1987. Online lessons available worldwide via FaceTime, Zoom, or Skype at $400 per session.

Related Posts

Technique

Understand Rod Acceleration

Read →

Technique

Understanding the Fly Fishers Triad

Read →

Technique

Standardization in Fly Casting Today

Read →
© 2010 Mac Brown · macbrownflyfish.com. All rights reserved.

Monthly Fly Fishing Updates & Prizes

Updates from the River, Blog Posts, School Updates, Show Appearances, Gear Picks, Fly Selections, & More every Month.

Subscribe to the List