Tag: flight rating

Disc Flight Numbers Explained

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misc disc golf flight chart

Disc Golf Flight Numbers

When disc golfers are eyeing a new disc, their number one question often revolves around its flight behavior: “How does it fly?”

Understanding a disc’s flight characteristics is one of the most important steps in deciding whether it deserves a place in your bag. While conditions like wind, elevation, and even humidity can influence how a disc behaves, the most important factor is how that disc performs for you. The best way to get a sense of that performance before even throwing it is by looking at the flight numbers usually printed right on the disc.

A chart showing the flight ratings of two different discs.These numbers, usually four of them, carry a lot of meaning. They help players predict the general flight path and stability of a disc. But to use them effectively, you have to understand what they represent and what they do not. Let’s break it all down.

Flight Numbers Decoded

When someone asks about a disc’s flight, I like to start with the widely used flight rating system and then consider the player’s skill level, arm speed, and throwing style before making a recommendation. The numbers are not exact nor perfect, but they provide a useful framework for comparison.

For this discussion, let’s assume a right-hand backhand (RHBH) throw, since that is the most common reference point when describing disc flights.

Understanding the Four-Digit System

The four-digit system pioneered by Innova is the most widely recognized way to describe a disc’s flight. Other brands have experimented with different formats, but the Innova-style four-number format remains the industry standard.

Those four numbers represent:

  1. Speed
  2. Glide
  3. Turn
  4. Fade

Each one affects how a disc flies through the air and how it finishes its flight.

Speed

The first number in the series represents speed, and it’s often the most misunderstood. Many players assume a higher speed number means the disc will fly faster or go farther. That’s not exactly the case.

Speed actually describes how much power you need to throw the disc properly. A disc rated at Speed 13, for example, is designed for powerful throws with high velocity. If you don’t throw it hard enough, it will behave more overstable and fade early.

On the other hand, a slower disc, say Speed 7 or 8, will be easier to control for most newer players and can still achieve plenty of distance when thrown properly. For beginners, starting with lower speed drivers and midranges is usually best. You’ll gain better accuracy and learn proper throwing form before moving up to faster discs.

Glide

The second number, glide, tells you how well the disc stays in the air. A higher glide number means the disc tends to float longer and carry farther down the fairway.

Glide is a beginner’s best friend. If you are just starting out, a disc with lots of glide can help you add easy distance without extra power. Discs like the Leopard or the Sphinx are great examples. They hang in the air and give you satisfying carry.

More advanced players sometimes prefer discs with less glide. That may sound counterintuitive, but lower glide can make it easier to control where the disc lands, especially in windy conditions or when accuracy matters more than distance.

A disc golf chart showing the flight of an Innova Mamba

Turn

Next up is turn, also known as high-speed stability. This number indicates how the disc behaves during the fastest part of its flight, right after the initial release.

Turn values typically range from +1 to -5. Negative numbers mean the disc will want to turn to the right for a RHBH thrower, which makes it understable. Positive or zero values indicate the disc resists turning, making it more stable or overstable.

Understable discs, with values like -3 or -4, are great for beginners because they’re easier to throw straight and get more distance with slower arm speeds. They’re also useful for turnover shots. More overstable discs are better for players with higher arm speed or shots that need to hold a steady line in wind.

a disc golf chart showing the flight of a stilleto

Fade

The fourth number, fade, tells you how the disc behaves as it slows down near the end of its flight.

High fade numbers (like 4 or 5) mean the disc will finish with a stronger left curve for a RHBH thrower. Low fade (0 or 1) means it will land more straight and gentle.

If you’re looking for predictable finishes that cut through wind or skip off the ground, choose a disc with more fade. If you want a straighter finish, go for something with less fade. Fade is what gives many overstable discs their trademark “hook” at the end, while understable discs tend to stay straighter or even drift right.

Infinite Discs Flight Ratings

While manufacturer flight numbers provide a useful baseline, they’re ultimately an estimate based on how the disc should fly under ideal conditions. In reality, how a disc flies varies from player to player.

That’s where the Infinite Discs Flight Rating system comes in. Infinite Discs developed an alternative rating method that pulls directly from player reviews. Instead of relying solely on manufacturer data, the Infinite system aggregates real-world feedback to produce an average set of flight numbers that better represent how discs actually perform for different types of players.

You can filter reviews by skill level or driving distance, which makes it easier to find information relevant to your game.

Example: The Roman

Let’s take a look at the Infinite Discs Roman as an example. On its product page you’ll see two sets of flight numbers: the manufacturer’s rating and the Infinite flight rating, based on hundreds of user reviews. You’ll notice slight differences between the two. That’s not a mistake, it’s simply the result of real players reporting how the disc flies in a variety of conditions.

The manufacturer's and reviewer's flight numbers

 

Scroll further down, and you’ll find even more data: average throw distances, player comments, and reviews. You can choose to read opinions only from players at your skill level or those who throw a similar distance. That kind of filtering is incredibly helpful for narrowing down what will work best in your bag.

Looking Ahead

Many factors determine the flight of the disc, and the four-digit flight system we use is the best we have to approximate the flight of a particular disc. It is just an approximation. The same mold in different plastic types flies differently. Even discs of the same mold and plastic might not fly exactly the same.

Still, the four-digit flight number system has become a cornerstone of disc golf, and it’s not going anywhere anytime soon. It’s simple, familiar, and helps players speak a common language when comparing discs.

But as technology and data collection improve, systems like Infinite’s are pushing that idea forward. By combining the simplicity of the original rating system with the insights of player feedback, disc golfers now have a clearer, more realistic picture of disc performance than ever before.

For now, the best approach is to use both. Study the manufacturer’s flight numbers to understand a disc’s intended flight, then use community-based ratings to confirm how it performs in the real world.

Together, they’re a powerful tool for helping you choose the right disc, and for understanding why it flies the way it does.

 

Learning Disc Golf Terms: Turn vs Fade

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Examples of disc with a log of turn vs fade

The Flight Path Challenge

Here’s the scene: you just arrived at your favorite course and are preparing to tee off on the first hole. You grab your favorite driver and are already looking forward to that wonderful S-shaped flight. But, after you give your disc a good, solid throw, the disc something weird. Instead of a short drift to the right followed by its usual finish to the left, it just keeps drifting off to the right. Heading toward a river, a road, an OB area, or something unfavorable. What is going on here?!

In this blog we will talk about turn vs. fade, what those terms mean, how they work, and how to use them to your advantage. This knowledge will help you make better disc selections for the variety of situations you’ll face on the course.

Turn and Fade Defined

Disc with a lot of turn: DGA SailFor those disc golfer new to the sport, let’s define a few terms that we will use in this blog. These are terms you will commonly hear in disc golf. If you’ve been playing a while, you can skip over this section, since you will be familiar with these terms.

Backhand throw: A popular method of throwing a disc where you implement an ‘X-step’ to twist your hips and ‘reach back’ the disc in preparation for throwing. The back of your hand will be facing the basket as you pull your disc across your body. The disc will rip out of your hand due to force created by the leverage of your arm and body.

Forehand throw: A method of throwing a disc where you are facing the direction you are throwing and motion of your body resembles a sidearm throw in baseball. Your palm will generally be facing the basket as the disc rips out of your hand.

Turn: When throwing a disc with your right hand with a backhand throw, ‘turn’ is when the disc drifts to the right when the disc is traveling the fastest. How much turn you get on a throw depends on the speed of the throw and the flight numbers of the disc.

Fade: In a RHBH throw, as the disc slows down toward the end of the flight, ‘fade’ is the distance and amount that the disc finishes to the left as is slows down. Discs have a natural tendency to move left as they slow down, but a disc with more ‘fade’ will travel further and faster left.

Flight Numbers 101

It would be good to have a quick primer on a discs flight numbers. The sport has adopted Innova’s four-number system to indicate the flight of a particular mold. In the description we will describe the numbers as if the disc were thrown RHBH. The four numbers represent:

Speed: The relative speed that you need to throw the disc at, in order for it to fly like the rest of the numbers indicate.

Glide: A general indication of how long the disc will stay in the air.

Turn: How much the disc will veer to the right during the flight of the disc.

Fade: How hard the disc will turn to the left at the end of the flight.

flight char of disc with a lot of turn

How Turn vs Fade Affect Your Throws

Obviously, the design of the disc can have a great impact on its flight. Some discs are designed to have a lot of turn, while others have a lot of fade. And there are plenty of discs in between those extremes. While the design of the disc definitely affects its flight, there are many other factors that will help determine how the turn and fade are affected. Here are some examples:

Wind:

Depending on the angle of the disc, cross winds can push the disc a long way in the direction it is blowing, or it can push a disc down to the ground. Turn and fade are really affected by headwinds and tailwinds. A headwind will give a disc more turn and minimize the fade. That is likely what happened to the disc mentioned at the beginning of the blog. A tailwind will reduce the amount of turn and add to its fade. Knowing how those wind directions affect your disc can help you adjust your throw or your disc selection to compensate for the effect of the wind.

Disc Weight:

If you throw discs of different weights with the same power, the heavier discs will not fly as fast. That will give the heavier discs less turn and more fade, while the lighter discs will have more turn and less fade.

flight chart of disc with a lot of fade

Plastic type:

Premium plastics are typically more overstable, especially plastics like Champion. That overstability reduces the turn on the disc, and adds a lot more fade. Even brand new, base plastics like DX or D-Blend will turn more than other plastics.

Disc wear:

New plastics will always be more overstable and offer less turn than plastic that have been ‘seasoned’, or broke in. A worn disc changes the effects of the rim of the disc and give the disc more turn. Sometimes discs can wear to the point that they have too much turn and are hard to handle. That might mean it’s time for a new disc.

Elevation:

Throwing uphill takes more energy and makes the disc behave as if it has more fade and less turn. Conversely, throwing downhill has the gravity assist and is easier to throw fast. That gives your disc more speed, which causes it to turn a lot more and fade less.

Choosing the Right Discs for You

Most people who are new to disc golf prefer molds that have a lot of turn.

The disc with the most fade: Doomsday Discs apocalypse

Doomsday Apocalypse Flight Numbers: 13/1/1/6

That gives them a little more extra distance, since most don’t have the technique and arm speed to throw molds that have more fade and less turn.

Once players have more skill and arm speed, they reach for discs that can resist turn, so they can get more distance. They will be throwing discs that are: heavier, newer, more overstable plastics, have more overstable flight numbers.

Regardless of your skill level, it is nice to have molds that are a little more overstable, and a little more understable so you can compensate for those situations that affect your flight, such as wind and elevation. Do you have a tailwind for your drive? Grab your disc that is more understable so you can still get the distance you need. Downhill shot? An understable disc might give you too much turn, so that would be a good time to reach for the more overstable disc.

Practice Makes Perfect?

It is a good idea to practice on windy days so you can learn how to either adjust the angle of your disc, or choose a different disc entirely, for given situations. The same goes for throwing up or down hill. You could even practice wind and elevation changes so you would be comfortable throwing in nearly any situation you may encounter. With a little experience you will have solutions for those times you are faced with adverse or unusual throwing conditions.

Learn the Flight

Disc golf is a fun challenging sport that is actually enhanced by the variety terrain and conditions we face when we play. By knowing our discs and how they fly for us, we will find more success in our disc selections, regardless of the situation. That confidence translates to lower scores and the satisfaction of knowing turn vs fade in a disc can be used to our advantage.