PBCoR vs Exit Velocty

While both coefficient of restitution (COR) and exit velocity are related to the performance of a pickleball paddle, they measure fundamentally different aspects.

Coefficient of Restitution (COR)

 * Defines: The ratio of the relative velocity of separation to the relative velocity of approach between two colliding objects.

 * Measures: The elasticity of a collision. (Ball elasticity too)

 * Impact on paddle: Indicates how much energy is transferred from the paddle to the ball during impact. A higher COR generally results in a faster ball speed. But as the angle of impact decreases it becomes meaningless to measure this metric. It angles and impacts normal to pickleball this metric is not meaningful.

Exit Velocity

 * Defines: The speed of the ball as it leaves the paddle.

 * Measures: The actual speed of the ball after being struck.

 * Impact on paddle: Reflects the combined effect of paddle material, design, player technique, and ball characteristics.

In essence:

 * COR is a property of the materials involved in the collision (paddle and ball) and influences the potential energy transfer.

 * Exit velocity is a direct measurement of the result of that energy transfer and other factors. 

To summarize: COR is a factor that contributes to exit velocity, but it's not the sole determinant. Other variables like paddle weight, shape, and player technique also influence the final ball speed.

Would you like to explore how these two factors interact in the context of pickleball paddle performance? Does it seem intuitive that exit velocity is preferable to COR and COR is targeted against materials?

Based on the high ball speed suggested at the first introductory meeting where they spoke about speeds in the neighborhood of 100 mph it's safe to say they will be choosing a coefficient of restitution that is relatively low as those speeds don't occur in pickleball. It's even more safe to occur the angle will be 90° or as close to it as possible is any other angle would be harder to measure.

At this point we are talking difficulty achieving any consistent angle of impact, along with measuring the outbound angle. So that means high speed cams and computer analysis.