Is th forgiveness of a club just MOI?

[ScottyCameron]

Just curious, is there more to forgiveness than MOI? For example, if two drivers have a MOI of 5000, does that mean they are equally forgiving?

[CalBoomer]

Moment of inertia is only applicable on mis-hits from heel to toe. If the club faces are equally wide and their MOI identical, then their forgiveness (in that one regard) should be pretty close if not exactly equal.

[ScottyCameron]

Moment of inertia is only applicable on mis-hits from heel to toe. If the club faces are equally wide and their MOI identical, then their forgiveness (in that one regard) should be pretty close if not exactly equal.

Thanks for the advise. I have a r5 right now and got a 909 d3 and the two drivers have the same head size, with the d3's face wider than the r5. So I think the moi is very similar.

[Clambake]

I think MOI is one component of club forgiveness, but not the only one. Other variables include how the clubhead interacts with the shaft interface, the shaft characteristics, the curvature of the clubface, the deformation on the clubface, and the rebound characteristics of the clubface. If two clubs have identical MOI, each of these can still yield different results for balls not struck at the precise sweet spot. That said, I would expect that MOI is probably the biggest driver (no pun intended) of forgiveness.

[ScottyCameron]

I think MOI is one component of club forgiveness, but not the only one. Other variables include how the clubhead interacts with the shaft interface, the shaft characteristics, the curvature of the clubface, the deformation on the clubface, and the rebound characteristics of the clubface. If two clubs have identical MOI, each of these can still yield different results for balls not struck at the precise sweet spot. That said, I would expect that MOI is probably the biggest driver (no pun intended) of forgiveness.

Thats true but considering the 909 d3 is newer than the TM r5 the d3 would have better technology for the off center hits. Correct me if I'm wrong, but I think the r5 was made in 2004, which back then players and club brands didnt worry so much about forgiveness. They have the same head size, and the d3 has a slightly wider face, thats why I think they have similar forgiveness.