News From Terre Haute, Indiana

On & Off the Course

September 29, 2007

Groovy wedges: Possible rule changes keep spinning

TERRE HAUTE — The USGA and the Royal and Ancient, through their distinctions of being the ruling bodies for the game of golf, have also been saddled with the burden or responsibility to protect the integrity of the game. In recent history this has meant keeping up to speed on golf balls, equipment being produced and setting guidelines for conformity. The latest equipment rules change is in regards to the grooves on clubs and their depth and shape.

Over the last couple of years the USGA and the R&A; have studied how groove design has an affect on the performance and spin of a golf shot. The data compared spin rates for “v” and “u” shaped grooves in wedges. V-shaped grooves played from the fairway have about 11,000 rpm of spin, while 10,000 rpm of spin came from u-shaped grooves. The bigger difference comes from shots hit out of the rough. There, u-shaped grooves create almost 2,000 rpm more spin than v-shaped grooves.

The catalyst for this study goes back to 1989 in the British Open that year, when Mark Calcavecchia, using a set of Ping Eye2 irons, hit a 5-iron on the 18th hole from a flyer-lie in the rough, that spun and bit just as if it had been hit from the fairway. The USGA and PGA tour were already in a legal battle over square grooves, that shot just did a great job of illustrating their point. Eventually a compromise was reached; the square grooves were modified slightly, and they were deemed legal.

The PGA Tour and USGA didn’t have much in the way of statistics to give their legal suit any girth at the time, but now they do. Since then, the USGA has been paying attention and compiling statistics. Their statistics show that scoring in PGA tournaments has changed drastically over the years, due to players’ abilities to throw balls at pins from farther distances and with worse lies.

Text Only | Photo Reprints
On & Off the Course
Latest News
TribStar.com Poll
AP Video
Raw: Thousands Flocking to German Crop Circle Texas Scientists Study Ebola Virus Small Plane Crash in San Diego Parking Lot Dangerous Bacteria Kills One in Florida Fighting Blocks Access to Ukraine Crash Site Smartphone Powered Paper Plane Debuts at Airshow Raw: Otters Enjoy Water Slides at Japan Zoo Raw: Deadly Landslide Hits Indian Village 3 People Killed, Deputies Wounded in NC Shootout Visitors Feel Part of the Pack at Wolf Preserve Raw: 16 Killed in Gaza Market Strike Workers Dig for Survivors After India Landslide Raw: Smoke, Explosions Fill Gaza Skyline Two Women Narrowly Avoid Being Hit by Train Southern Accent Reduction Class Cancelled in TN 3Doodler Bring 3-D Printing to Your Hand Russia Counts Cost of New US, EU Sanctions Obama: 'Blood of Africa Runs Through My Veins' Obama Chides House GOP for Pursuing Lawsuit Today in History for July 31st
NDN Video
Famous Internet Cats Help Big Cause With Viral Video Snoop Dogg Narrating Animal Footage Is Perfect Tigers Acquire David Price - @TheBuzzeronFOX Russell Brand Slams Sean Hannity Over Gaza Conflict Segment Chapter Two: Composing for a film in retirement Woman's Dive Goes Terribly Wrong Brian Williams Reports on Daughter Allison Williams' 'Peter Pan' Casting News Did Jimmy Fallon Look Up Heidi Klum's Dress? What Drama? Miranda Kerr Poses Topless Plane crashes in San Diego Costco parking lot Justin Bieber Takes To Instagram To Diss Orlando Bloom You Won't Believe the Celeb Cameos in "Sharknado 2" Pitch Invading Morons Cause Chaos - @TheBuzzeronFOX Orlando Bloom 'Takes a Swing' at Justin Bieber In Ibiza Sadie Doesn't Want Her Brother to Grow Up "Maxim" Hotness! See Jessica Alba's Sizzling Spread Two women barely avoid being hit by train Broken Water Main Floods UCLA Orlando Bloom and Justin Bieber Reportedly Came To Blows In Ibiza Meet the Man Behind Dumb Starbucks
Parade
Magazine

Click HERE to read all your Parade favorites including Hollywood Wire, Celebrity interviews and photo galleries, Food recipes and cooking tips, Games and lots more.
  • -

     

    March 12, 2010

activity