disc - tech info

Flight Ratings System
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Brief Description of Terms
> Stability is a description of the disc’s flight path.
> Understable means a flight that turns right (RHBH throw).
> Stable is a flight that doesn’t turn.
> Overstable refers to a flight that turns left (RHBH throw).
> Spike/Spike Hyzer is a shot that lands almost vertically and doesn’t skip.
> Skip is a shot that is meant to fly after it hits the ground. 

What do the numbers mean? The Innova Flight Ratings System was designed as a way to describe a discs intended flight. Flight Ratings are broken into four main categories: Speed, Glide, Turn, & Fade. These characteristics can be used to rate various aspects of each disc’s flight. Each disc has a distinct "personality"; the flight path that makes that disc unique. Flight Ratings can be used to compare Innova golf discs to each other. Other companies have adopted a similar system, but it’s important to note that flight ratings shouldn’t be used to compare discs between brands since each company rates discs differently. We have over 90 disc models to satisfy a wide range of players and throwing techniques. To learn more about what each of these characteristics mean, refer to the descriptions below. Flight Ratings are based on right hand backhand (RHBH) throws.


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Discraft FLight Chart

Discraft Quick Reference

Why do some discs fly to the left, and others go right? Like clubs in ball golf, Discraft golf discs are designed to travel on a variety of flight paths to help you meet any course challenge. The way we define a disc's flight characteristics is through the term stability. Let's assume you are a right handed player using a backhand throwing motion. If you throw a disc on a straight, flat line using average power and it continues to fly straight, that disc is considered to be stable, and would be given a stability rating of (0). Now you choose another disc, and this one fades to the right. We call that disc understable, and would give it a negative stability rating of (-1) for a gentle turn, and (-3) for a more severe turn. When it comes to drivers, understable discs are easiest for new players to control. Most golf discs -- especially drivers -- tend to fade to the left, which would put them somewhere within the overstable range. This is the more natural flight path for sharp edged discs. These discs get a positive rating of (1) for a subtle fade, or higher (2.5) for a harder turn.

Q: I am left-handed, and this chart is for right-handed, backhand throws. What about me?

A: Overstable discs fade away from the direction of the spin of the disc. In the examples above, the spin on the disc is clockwise (to the right), so an overstable disc fades left. The chart will need to be reversed whenever the spin on the disc is reversed. For example, a left handed player using a backhand throw (counter clockwise spin) will see an overstable disc fade right, not left. The same goes for a righty using a forehand throw, and so on.