Re: ShopTalk: Assembling NBP to CD

[Bernie Baymiller]

Title: Message

John,   >So basically the NBP will be somewhere on the top of the shaft when looking a the finished club.   That's correct. On my wedges, the top of the neutral bending plane is often about 1:30. My low R iron shafts are stiffer and shorter (especially the wedges) than those on my woods, so I didn't have a toe drop problem with the irons.   Also the NBP seemed to be about the same 1:30 location on my 450cc Integra test driver head. When I checked impact areas on my test driver face using a high A-flex shaft, impacts were centered well horizontally, but high on the driver face. When I used spine plane-COG with good FLO, the impacts were centered well both horizontally and vertically. I noticed an improvement in short iron accuracy with NBP-COG, but didn't see any real difference in ball flight or accuracy between Spine-COG and NBP-target alignments on my drivers. My regular driver is a BOM aligned NBP-target with the same shaft, the same length and S/W as the test driver. As I noted before, my Cy 13° seems to play a bit better off the deck with Spine-COG than it did with NBP-target.   These are all just my observations...I really don't have the equipment to measure any of the ball flights accurately. I've discussed this topic with other clubmakers who tried these alignments. Most concur in improved short iron accuracy, one has decided to do all his clubs Spine-COG. Haven't tried my irons that way yet.   Bernie Write to: [EMAIL PROTECTED]