ATA Bow Tech Bow Mechanics & Physics Flashcards

What is the significance of 'timing' in a two-cam compound bow?

Answer: Both cams must reach full rotation at the same moment for optimal efficiency and arrow flight

Proper cam timing ensures both cams rotate synchronously, maximizing energy transfer and producing a level, consistent nock travel.

How does arrow total weight (grains) affect kinetic energy versus arrow speed?

Answer: Heavier arrows carry more kinetic energy but fly slower; lighter arrows fly faster but carry less energy

Kinetic energy depends on both mass and velocity; heavier arrows sacrifice speed but gain momentum and penetration.

What does 'nock travel' describe in compound bow performance?

Answer: The path the arrow nock travels from rest to brace height as the string is released

Level nock travel — where the nock moves straight forward rather than up or down — is the goal of proper cam timing and limb alignment.

What role do bow limbs play in the energy storage and release cycle?

Answer: Limbs flex under draw weight to store potential energy, then spring back to release that energy through the string

The bending and recovery of bow limbs is the core energy-storage mechanism; limb stiffness directly influences draw weight and speed.

What is 'peep sight alignment' and why does it matter for consistent accuracy?

Answer: The peep must align with the shooter's eye and front sight at full draw to create a repeatable aiming reference

A consistently aligned peep creates the same eye-to-sight picture every shot, which is critical for repeatable accuracy.

How does cam lean affect arrow flight?

Answer: Cam lean causes the string to track off-center, introducing lateral force that steers the arrow left or right

When a cam tilts (leans) rather than rotating in a true vertical plane, it applies a sideways push to the string and arrow, deflecting its path.