To correctly MOI match a set requires an MOI machine. Close enough approximations will work as I explain later.
Why MOI? It takes less force, effort, energy to swing a shorter club than it does a longer club. MOI is a measure of a clubs resistance to an applied force. MOI matching slightly increases the weight of the shorter clubs so the lighter clubs will match the longer ones to improve swing consistency throughout the set. A truly MOI matched set will match to the longest club. For most golfers this is not ideal; most golfers prefer to MOI match to a favorite club; allowing some longer ones to have a higher MOI. Switching to hybrids in the longer clubs is one way to bring down the MOI of longer clubs.
You can APPROXIMATE an MOI matched set in many ways. One is to keep half inch increments and increase the swingweight in each progressive shorter iron by about .4 SW points. say; 7 iron d-2, 8 iron d-2.4, 9 iron d-2.8. Another APPROXIMATE way is via formula
MOI = .25*Ws*L^2 + Wh*L^2 is the one I use
Ws is weight of the shaft, Wh weight of the head
L is length of the club.
Every clubmaker seems to have their own favorite formula or approximation. The point of contention is the contribution of the weight of the shaft to the MOI.
roco
--x--x--
the easy way is to add some lead tape to the shaft just above the hosel. Add none to the club you like the way it is add 1" of tape to the next shorter club, 2" to the next shorter one, down to the wedges.
roco
Why MOI? It takes less force, effort, energy to swing a shorter club than it does a longer club. MOI is a measure of a clubs resistance to an applied force. MOI matching slightly increases the weight of the shorter clubs so the lighter clubs will match the longer ones to improve swing consistency throughout the set. A truly MOI matched set will match to the longest club. For most golfers this is not ideal; most golfers prefer to MOI match to a favorite club; allowing some longer ones to have a higher MOI. Switching to hybrids in the longer clubs is one way to bring down the MOI of longer clubs.
You can APPROXIMATE an MOI matched set in many ways. One is to keep half inch increments and increase the swingweight in each progressive shorter iron by about .4 SW points. say; 7 iron d-2, 8 iron d-2.4, 9 iron d-2.8. Another APPROXIMATE way is via formula
MOI = .25*Ws*L^2 + Wh*L^2 is the one I use
Ws is weight of the shaft, Wh weight of the head
L is length of the club.
Every clubmaker seems to have their own favorite formula or approximation. The point of contention is the contribution of the weight of the shaft to the MOI.
roco
--x--x--
the easy way is to add some lead tape to the shaft just above the hosel. Add none to the club you like the way it is add 1" of tape to the next shorter club, 2" to the next shorter one, down to the wedges.
roco
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