1. What is the ATA Speed Formula?

The ATA (Archery Trade Association) speed formula calculates bow speed according to standardized testing protocols. It provides a consistent method for comparing bow performance across different models and manufacturers.

2. How Does the Calculator Work?

The calculator uses the ATA speed formula:

Where:

• \( Base\_speed_{ATA} \) — Base speed measured at 70 pounds draw weight (fps)
• \( Draw\_weight \) — Actual draw weight of the bow (pounds)

Explanation: The formula scales the base speed proportionally to the draw weight, with 70 pounds as the reference point.

3. Importance of ATA Speed Calculation

Details: ATA speed standardization allows archers to compare bow performance objectively, helping in equipment selection and understanding arrow ballistics.

4. Using the Calculator

Tips: Enter the base speed (measured at 70 lb draw weight) in fps and your actual draw weight in pounds. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 70 pounds used as the reference?
A: 70 pounds is the standard draw weight established by the ATA for consistent testing and comparison across different bow models.

Q2: How accurate is this calculation?
A: This provides a good estimate, but actual speed can vary based on arrow weight, bow efficiency, and other factors.

Q3: What is a typical base speed for modern compound bows?
A: Most modern compound bows have base speeds between 300-350 fps when measured at 70 pounds draw weight.

Q4: Does arrow weight affect the calculated speed?
A: The ATA standard uses a specific arrow weight (350 grains), so this calculation assumes standard testing conditions.

Q5: Can I use this for recurve bows?
A: This formula is primarily designed for compound bows tested under ATA standards. Recurve bow speeds are typically lower and follow different dynamics.