QA Square Drivers Spin Control

By Frank ThomasMarch 7, 2007, 5:00 pm
Editor's Note: This is the latest in a weekly Q&A feature from The Golf Channel's Chief Technical Advisor Frank Thomas. To submit a question for possible use in this column, email letsbefrank@franklygolf.com
 
Nike and Callaway are introducing new square headed drivers for 2007. They claim the square head shape has allowed them to increase the MOI and thus produce a straighter hitting driver. I understand the MOI theory, but does a square head really make a difference or is this just more marketing hype? -- Richard
 
Richard,
Let me say the following: When the MOI increased from 2,000 gm cm to 4,000 gm cm there was a significant improvement in performance on mishits. But from 4,000 gm cm to 6,000 gm cm there is very little. Most of the bigger 400cc to 460 cc drivers have about 3,500 gm cm to 4,000 gm cm MOI and perform very well.
 
The latest square drivers have improved the MOI to 5,300 gm cm but the improvement in performance doesnt come close to the improvement we have seen from 2,000 to 4,000 gm cm. A good case of diminishing returns.
 
The other reason why the manufacturers are doing this is to be different and also to approach the MOI limit placed by the USGA. Any time there is a limit golfers assume that being just under it is good. Thus the reason for the 460cc drivers (limit is 470cc) and now the high MOI. I very much doubt that you will be able to see any real measurable difference in performance because of the increase to 5,300 gm cm unless you really miss the sweet-spot.
 
There is not much more room for movement in performance in drivers so pushing the envelope re. the limits seems to be a good way to impress golfers. I believe that in time we will see a return to 400 cc drivers and traditional shapes.
 
Frankly, for the moment, being square is cool.
 
For more on square drivers check out my latest newsletter by clicking here.
 
Dear Frank: Do the current drivers (large head - thin face) get 'weak' after use? That is, does the COR decrease over time with a consequent loss of distance?
Sincerely
--Stew

 
Stew,
Yes the COR will eventually decrease as you continually hit the center of the face. The time it takes depends on the speed at which you impact the ball and how often. The club faces are very thin and it will take about 5,000 to 10,000 impacts on the sweet spot at 115 to 120 mph head speed for the face to start deteriorating. This number depends on the manufacturing process and control of the face thickness and how it is welded to the body of the head.
 
This should not be of too much concern to most of us because we do not swing fast enough and dont hit the sweet spot very often. By the time we get to the critical number we will probably need a new driver anyway.
 
The best way to check if the face is starting to deteriorate is to place a credit card edge on to the face and check to see that it is rocking on the face because of the roll and bulge built into the new club face.
 
If the card does not rock and you are unable to see light under the edge, the face has flattened and you should think about getting a new driver.
 
Frank,
I am a 20-handicapper. I use a 10.5 driver, and the lowest spin rate I have ever been able to achieve is 4,000. Should I use a more lofted driver?
--Lou

 
Lou,
I dont know what your swing speed is, but if its 80 to 90 mph then your launch angle should be 13 to 14 degrees and spin rate should be about 3,500 rpm. If your launch angle is higher than this, get a driver with a lower loft; if not, then stay with what you have. Four thousand rpm is not bad. The other thing you can try is to hit the ball a little higher on the face to decrease the spin, but this will increase the launch angle.
Hope this helps,
Frank
 
Click to purchase the Frog PutterFrank Thomas, inventor of the graphite shaft, is founder of Frankly Golf, a company dedicated to Helping Golfers. Frank is Chief Technical Advisor to The Golf Channel and Golf Digest. He served as Technical Director of the USGA for 26 years and directed the development of the GHIN System and introduced the Stimpmeter to the world of golf. To email a question for possible use in an upcoming Let's Be Frank column, please email letsbefrank@franklygolf.com
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Next up for Koepka: Buddies and a bachelor party

By Will GrayJune 24, 2018, 7:46 pm

CROMWELL, Conn. – Coming off a successful title defense at the U.S. Open, Brooks Koepka arrived at the Travelers Championship in need of a nap. It appears he won’t be getting one anytime soon.

Koepka normally wakes up by 6 a.m. without using an alarm, but without much down time since his victory at Shinnecock Hills he slept in until 8:20 a.m. Sunday morning, prior to his 10:40 a.m. tee time. Any impact to his pre-round routine appeared negligible, as Koepka fired a 5-under 65 that included seven birdies over his first 13 holes.

“I felt like today was kind of the first day I got everything back,” Koepka said. “I was definitely running behind, but it was nice to catch up on some sleep.”

Koepka became the first U.S. Open winner to play the week after since Justin Rose in 2013, and he finished the Travelers at 9 under with four straight sub-par rounds. While he’s got some free time in the coming days, it won’t exactly be restful.


Full-field scores from the Travelers Championship

Travelers Championship: Articles, photos and videos


“We’ve got 11 guys that I’m pretty close with, so I’m looking forward to hanging out with them in Boston for a few days and then [getting] back down to West Palm for a night, and then we’re off to my best friend’s bachelor party,” Koepka said. “I was really hoping to get some rest, but I don’t know how much that will happen.”

Last year, Koepka took a month off following his U.S. Open win at Erin Hills, only touched a club once, and still finished T-6 at The Open at Royal Birkdale. While this will be his final competitive start before Carnoustie, he expects to make a strong run toward a third major title next month in Scotland.

“I’m shutting it down for a while. I don’t feel like I need to play,” Koepka said. “I feel like my game’s in a good spot, played really well this week. Just some stupid mistakes and mental errors. That’s all it was, lack of focus and low energy. To be honest with you, I’m not surprised. I did play well though, I putted well, and I’m somewhat pleased.”

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Spieth ends busy stretch without top-10 finish

By Will GrayJune 24, 2018, 7:39 pm

CROMWELL, Conn. – There were no final-round heroics this time around for Jordan Spieth at the Travelers Championship.

After taking the title last year with perhaps the most memorable shot of the year, Spieth appeared poised to make a robust defense of his title after an opening-round 63 gave him a share of the lead. But that proved to be as good as it would get, as he played the next three rounds in a combined 3 over to drop outside the top 40 on the final leaderboard.

It marked the end of a pedestrian run of six events in seven weeks for Spieth, during which his best finish was a tie for 21st at the AT&T Byron Nelson.

“A lot of cut-line golf, which is somewhat unusual historically for me, fortunately,” Spieth said after closing with a 1-under 69. “Kind of a grind, but I made actually a lot of progress where I needed to within the last few weeks.”


Full-field scores from the Travelers Championship

Travelers Championship: Articles, photos and videos


Spieth has struggled to get on track on the greens this year, but he has started to turn a corner in recent weeks, specifically during a missed cut at the Memorial Tournament, and he picked up more than three shots on the field this week in strokes gained: putting.

“My putting’s right on point where it needs to be. It’s getting better every single week,” Spieth said. “It’s the best it’s been in a couple years.”

Unfortunately for Spieth, a slight uptick in putting has coincided with some regression from his normally reliable ball-striking. Of the 74 players who made the cut at TPC River Highlands, he ranked 61st in strokes gained: tee-to-green.

“I’ve just got to kind of get my alignment back in order on the full swing. It’s tough when you swing and you think you hit a good shot, and you look up and the ball’s, it could be 15 yards right or 15 yards left, and it’s all because of alignment,” Spieth said. “It’s literally the same thing I went through with the putting. I’ve just got to find a way to get it back on track with the full swing.”

Having concluded a busy stretch, Spieth noted that he now has “a few weeks off.” But still in search of his first quality chance to contend heading into a final round this year, he didn’t rule out the notion of adding a start before defending his title at Carnoustie next month.

Spieth is not in the field for next week’s Quicken Loans National, but he won the John Deere Classic in both 2013 and 2015, which will be played the week before The Open.

“As far as leading into The Open, we’ll see,” Spieth said. “Last year I went in after three weeks off and it didn’t hurt me. So I believe I can get the work in whether I’m playing or not, to get the repetitions.”

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Chamblee comments on Choi's unique step-through swing

By Golf Channel DigitalJune 24, 2018, 3:55 pm

The golf world found itself enamored with a largely unknown journeyman this weekend.

Ho-sung Choi went from 554th in the world to No. 1 in the hearts of all those who swing the golf club just a little bit differently thanks to his run at the Korean Open.

The 44-year-old with the exaggerated step through impact found himself two off the pace through 54 holes and in contention for one of two available invitations to this year's Open Championship at Carnoustie.

Choi fell out of the hunt for tournament title and the Open exemption with a final-round 74, but nonetheless left an impression with his tie for fifth.



Asked about Choi's swing Saturday night, Golf Channel analyst Brandel Chamblee offered the following:

"If Chi Chi Rodriguez and Gary Player had a golf school, what would their first professional golfer swing like? Voila," Chamblee said.

"Both those legends had walk through finishes, but Ho Sung has taken this move to a new level with a borderline pirouette to keep from hanging back.

"In an era when professional golfers get accused of having golf swings that all look alike, I’ve never seen anyone swing quite like Ho Sung Choi.

"I can’t wait to try this on the range tomorrow."

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Wallace holds off charges to win BMW International

By Associated PressJune 24, 2018, 3:43 pm

PULHEIM, Germany - England's Matt Wallace shot a 7-under 65 to hold off a record-breaking charge from Thorbjorn Olesen and win the BMW International Open on Sunday.

Wallace finished on 10-under 278 - just ahead of Olesen, Mikko Korhonen and 2008 winner Martin Kaymer, whose chances took a blow with a bogey on the 17th hole.

''I want to keep building on this,'' Wallace said after his third European Tour win. ''Obviously this gives me a lot of confidence to go on and play well and I want to kick on and hopefully do this in the bigger events from now on.''


Full-field scores from the BMW International Open


Olesen had played himself into contention with the lowest round in tournament history, with nine birdies and an eagle for an 11-under 61. It was the lowest round of his European Tour career and it gave the Dane a three-shot lead before the final group had even teed off.

''I was just trying today to go out there and build on my game, see if I could shoot a low score,'' Olesen said. ''Obviously as the round progressed I kept on thinking birdies and trying to make the round better. Finishing with four birdies was pretty nice.''

Wallace turned in 34 but then made five birdies in seven holes from the turn to edge a shot past Olesen. He waited as Kaymer and Korhonen went close with rounds of 68 and 67, respectively.

England's Aaron Rai and Denmark's Lucas Bjerregaard finished joint-fifth with rounds of 69.