1. What is FOC in Archery?

FOC (Front of Center) percentage is a measurement that indicates how much of an arrow's total weight is located in the front half of the arrow. It's crucial for arrow flight stability and accuracy.

2. How Does the Calculator Work?

The calculator uses the FOC percentage formula:

Where:

• \( Balance\ Point \) — Distance from nock end to balance point (inches)
• \( Half\ Length \) — Half of the total arrow length (inches)
• \( Length \) — Total arrow length (inches)

Explanation: The formula calculates what percentage of the arrow's length is in front of the center point.

3. Importance of FOC Calculation

Details: Proper FOC affects arrow stability, accuracy, and penetration. Most archers aim for 10-15% FOC for target shooting and 12-20% for hunting.

4. Using the Calculator

Tips: Measure your arrow's total length, find the balance point (where it balances on your finger), and enter these values. The calculator will determine your FOC percentage.

5. Frequently Asked Questions (FAQ)

Q1: What's the ideal FOC percentage?
A: For most setups, 10-15% is ideal for target shooting, while 12-20% works better for hunting arrows.

Q2: How do I measure balance point accurately?
A: Balance the arrow on a narrow edge (like a pencil) and measure from the nock groove to this point.

Q3: Does FOC affect arrow speed?
A: Higher FOC typically means slightly slower arrow speeds but better stability and penetration.

Q4: How can I adjust my FOC?
A: Add weight to the front (heavier points) or rear (lighter vanes) to adjust FOC percentage.

Q5: Does FOC matter for compound and traditional bows?
A: Yes, though the ideal range may vary slightly between different bow types and shooting styles.