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Iron MOI and MPF

  • 6:53PM - Aug 4, 2008RE: Iron MOI and MPF

    #19
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    Now i’m guilty, I’ll stick with MR Maltby

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  • 11:40AM - Aug 4, 2008RE: Iron MOI and MPF

    #18
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    “Randy”. LOL!

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  • 1:27PM - Aug 3, 2008srixon

    #17
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    Randy, I appreciate the info, the MPF is so low I thought mabe it was the Tour head.

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  • 12:06PM - Aug 3, 2008RE: Iron MOI and MPF

    #16
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    shane, it does not say “Tour” anywhere on it. It has the undercut sole cavity.

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  • 4:57PM - Aug 2, 2008RE: Iron MOI and MPF

    #15
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    Thanks Ralph, was this the 701 tour or the 701 with the pocket cavity?

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  • 3:05PM - Aug 2, 2008RE: Iron MOI and MPF

    #14
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    shane, I finished measuring the Srixon I-701 last week and emailed the results directly to Randy. I hope he received it OK. I went to post it but could not find the thread, so you really helped me out here by asking again for it. Thanks. Below is my answer to Randy.

    Randy, sorry it took me a little longer to get to this than anticipated. Here is the data; the MPF of the Srixon I-701 is 346 points and in the “Classic” category. The actual vertical center of gravity is .818”, the “C” Dimension is 1.121” and the Moment of Inertia (MOI) is 12.8573. The # 6 iron loft was 30 degrees and the head weighed 258.6 grams. The horizontal center of gravity relative to the middle of the face was .095” into the heel. The basic rearward center of gravity is .540”.

    This was an interesting iron design as I looked at it and I went ahead and did a few more measuring tasks. This is an iron that you could not use the lie angle board with because the sole radius from toe to heel touches the ground ¼” forward of face center. At impact with the ball, you really want the iron head striking the ground at its face center, in the proper lie position and with the horizontal center of gravity in the face center. When all three of these occur at impact, you lessen the chance of inducing any extra clubhead rotation. You want any extra rotation of the clubhead to be caused only by an off-center hit and then have the MOI take over and do its best to resist the rotation.

    Another interesting find was the sole radius from front to back was quite excessive for a good player’s blade. I measured the bounce to be 6 degrees which would seem to be necessary when the front to back radius is that much. In my experience however, this sole would still be too bouncy for a tour professional and they would probably have me flatten it from front to back some.

    In my opinion, anyone playing this blade would need to be a strong down and through hitter, probably a very low handicap because you really need to hit this one on face center more often. Finally, the leading edge is slightly too sharp for a really good player. It is beveled up from the sole to square the leading edge, but it is not rolled into the face quite enough.

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  • 8:09PM - Jul 31, 2008srixon

    #13
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    Ralph, Did the Srixon I-701 MPF get posted? if it did I missed it.

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  • 12:43PM - Jul 21, 2008RE: Iron MOI and MPF

    #12
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    Randy, I just returned from a vacation last night, so I will get the results to you this week. I will post the results here for everyone and also send them to the personal email address you provided. Thanks again for sending in the Srixon i-701 head.

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  • 8:59PM - Jul 19, 2008RE: Iron MOI and MPF

    #11
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    Ralph, Thanks for the gift! I look forward to seeing all the numbers when you have a chance to post them.

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  • 6:44PM - Jul 8, 2008RE: Iron MOI and MPF

    #10
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    My mistake, its the 701

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