Question

1.18K viewsJune 22, 2023

commander_woof 39 June 20, 2023 0 Comments

My understanding is that the MPF rating (3rd value, 1, 2, 3) for shafts describe the launch trajectory (low, mid, high). For whatever reason there are a few shafts that have a different launch trajectory for the same value.

Nippon NS Pro 950gh Neo: Stiff is rated 4B1H, but trajectory description says High and not Low.

True Temper Score LT: Stiff is rated 4B2H, but trajectory description says High and not Mid.

FST 125 Stiff is rated 4C1H, but trajectory says Mid, not Low.

Am I misunderstanding the MPF ratings? These seem like the outliers.

commander_woof Unselected an answer June 22, 2023

1 Answer

Answer 1 · 2023-06-21T21:33:40+00:00

First, the chart online for he Nippon NS Pro 950gh Neo under the .370 tip is incorrect. It will be adjusted. The MPF is 4B2H. Even though Nippon describes it as a High(er) trajectory than average, our analysis and testing yielded, when we plugged the data into the formula, the “2” rating as part of the MPF. Doesn’t mean that it would not produce a higher trajectory for you or anyone else, but based o our analysis it leans a little more to the mid.

On the Score, the Stiff leans a little to a mid, but trimmed for a regular leans a little towards a higher trajectory. Again, True Temper would describe it as a high, but our formula puts the number at a “2” in the formula.

On the FST, FST calls it a Mid, but it has always been the “1” in the MPF formula. “Mid”, I think, is sometimes the best guess by the manufacturer when they really did not do detailed trajectory analysis of designs they produce.

We generally publish the trajectory that the manufacturer says it is designed to or targeted to, but we do run our analysis and assign the MPF as well. Many times they reflect the same trajectory. Sometimes they don’t. A lot goes into the MPF rating, including the torsional stiffness, overall profile stiffness, weight, balance point, deflection profile, and more. Any given shaft may perform as the manufacturer calls it out to, but also may lean towards what we find. The MPF should be used as a tool to help narrow down the choices and hopefully guide to choices that will fit the players needs.

Hope this helps explain it for you.

Britt Lindsey

Ok that makes a lot more sense now given the Neo was mis-labeled. The others are just on the end of the spectrum given they’re combo flex shafts.