1. What is Arrow FOC?

Front of Center (FOC) is a measurement that describes how much of an arrow's total weight is located in the front half of the arrow. It's expressed as a percentage and affects arrow flight characteristics.

2. How Does the Calculator Work?

The calculator uses the FOC formula:

Where:

• \( FOC \) — Front of Center percentage
• \( L \) — Total arrow length (inches)
• \( AMO \) — Balance point measurement from nock end (inches)

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

3. Importance of FOC Calculation

Details: Proper FOC is crucial for optimal arrow flight. Higher FOC arrows (10-15%) are more stable but may sacrifice speed, while lower FOC arrows are faster but may be less accurate.

4. Using the Calculator

Tips: Measure total arrow length from nock groove to end of point. Find balance point by balancing arrow on a narrow edge. Enter both measurements in inches.

5. Frequently Asked Questions (FAQ)

Q1: What's the ideal FOC for Gold Tip 2 arrows?
A: Typically 10-15% for most hunting applications, but may vary based on bow setup and personal preference.

Q2: How does FOC affect arrow flight?
A: Higher FOC increases stability and forgiveness but reduces speed. Lower FOC increases speed but may decrease accuracy.

Q3: Should I measure with or without broadheads?
A: Always measure with your hunting setup (broadheads or field points) as this affects the actual balance point.

Q4: Can FOC be too high?
A: Yes, excessive FOC (>20%) may cause clearance issues and require heavier bow tuning adjustments.

Q5: Does arrow spine affect FOC?
A: While spine doesn't directly affect FOC calculation, stiffer arrows may require different FOC for optimal performance.