Tom Fielding Golf School Japan

  • Is Bigger Better?When it comes to irons, the conventional wisdom is clear.  Smaller irons are for better players.  Big irons are easier to hit and more forgiving.
    Is the same true of drivers?  Most manufacturers max out the size of every driver in their line up, but is that helping the average player?  We tested some 460cc drivers against their smaller counterparts to find out.


  • The MythsMyth #1 – Larger drivers produce more consistent distance
    Myth #2 – Larger drivers are more accurate
    Myth #3 – Better players always prefer smaller drivers
    Myth #4 – Smaller drivers only fit better players

    How We TestedWe brought together five golfers for this test, with handicaps ranging from 4 to 27.  Each player hit seven drives with each of four different driver heads: the PING G400, PING G400 Max, TaylorMade M3, and TaylorMade M3 440.  Every player used the same shaft in each driver, and the adjustments on the heads were held constant.  Each shot was recorded on Trackman.
    All testing was done at and with the help of Club Champion.

  • The Results


  • Overall, the larger driver heads produced more distance in our test, but there were enough exceptions to rate this myth “Plausible” instead of “Confirmed.”
    We looked at the distance issue from a number of different angles.  First, we looked at carry distance.  By this metric, the bigger heads won 8 out of 10 trials.  When we switched to total distance, the margin was closer: the larger heads went 6-3-1 (one of those losses was by 0.2 yards).
    Because judging by distance brings launch, spin, and direction into play, we also looked at ball speed and smash factor.  In ball speed, the larger heads won 6 of 10 trials.  When we evaluated smash factor, the larger heads won 7 trials and lost only 2.
    The main takeaway here is that, by virtue of being more forgiving, the larger heads consistently produced more ball speed relative to club head speed.
    There were also a couple interesting nuggets in the data.  First, swing speed did vary significantly between larger and smaller heads but without a consistent pattern.  Also, there was no clear pattern regarding club size and launch or spin.  Smaller heads are thought to be lower spinning, but that wasn’t universally true in our test.


  • In one of the more surprising results, the larger drivers did not prove to be more accurate.  Whether we looked at average distance offline or the size of the shot grouping, it was a pure toss up between the larger and smaller heads.
    This is one test where I believe that a larger sample – specifically more shots for each player, over a longer period of time – might change the outcome.  Larger heads should have higher MOI and thus produce straighter shots on mishits.  That won’t change anything for the player that loses control of the club face or swing path, but I would expect it to show up over a larger sample.


  • For this myth, we evaluated the claim above and its counterpart – less skilled players prefer larger drivers.  We found both to be lacking.
    The highest handicap player in our test was the one with the strongest preference – for the smaller TaylorMade driver.  Our two lower handicap players were generally indifferent, moved only by the better results they got from the larger heads.
    One interesting thing came to light during the questioning.  Most players did not have any preference between the two PING drivers, but everyone noted a large visual difference between the two TaylorMade drivers.  This speaks to the fact that shaping and crown graphics can have a significant impact on how big 15 or 20 ccs looks.


  • Like the preceding myth, this is busted on both front.  Not only did our best players hit the larger heads better, our higher handicap player was best with the smaller heads.
    There are two major factors that explain why this myth doesn’t stand up.  First, comfort over the ball is important for players of all abilities.  Our highest handicap player preferred the look of the smaller heads and proceeded to hit them better.
    More importantly, there is not one set of launch conditions that will fit all players in a given handicap range.  Higher launch is often thought of as something that slower swingers need, but two of our faster swingers launched the bigger heads higher and got more carry distance because of it.  For our slowest swinger, lower spin added distance.

  • Conclusion

  • Whether you’re a 20-handicap who wants to try a smaller driver head or a scratch player who games a sub-460 cc driver because you’re “supposed to,” I hope this has given you the motivation to try something new.
    As we have shown time and again, there are no hard and fast rules when it comes to club fitting.  Larger heads did prove to be more forgiving when it comes to ball speed, but that didn’t translate to more distance for every player.  Rather than relying on conventional wisdom, book a session with a skilled club fitter to find out what will work best for you, and don’t be afraid to try something out of the box.

  • The Data

Picture
.

キャロウェイ方式【Callaway system】とは

キャロウェイ方式とは、ハンディキャップの決め方の一つです。アメリカのティーチングプロ、ライオネル・キャロウェイ氏が考案したことから、この名前が付きました。

ライオネル・キャロウェイ氏が考えたハンディ方式です。グロスのスコアと最も悪いスコアに応じて査定表でハンディキャップを決める方法です。

この方法では、元々のスコア(グロス)と最悪ホールのスコアに応じて、「査定表」でハンディキャップを決定します。査定表は、以下の様なものです。



実際の値で確かめてみましょう。たとえば、元々のスコアが95で、悪いスコアのホールから順にスコアが8,7,6だったとします。グロスが95の時の計算方法は、「悪いスコア・下から2つ+次に悪いスコアの1/2」となっていますから、これを計算すると、
8+7+(6÷2)=18
以上のようになります。そこから、95の「調整スコア」である+2を足して、最終的なハンディキャップは「20」となります。



※これ以降、グロススコア・計算式が繰り返されます。できれば、「グロススコア110」くらいまでで区切っておきたいところです。もしもダブルパーを打ったホールがあったとしても、トリプルボギーとして処理したり、最大でハンディ30とか36とか上限を設けることもいいでしょう。



上の査定表を使ってみましょう。この例ではグロススコアが92ですのため、調整スコア「-1」を取り出します。92では「最悪スコア2つ+次に悪いスコアの1/2」ですから、最悪スコア2つは、11番ホールの8と五番ホールの7になります。次に悪スコアの1/2は6ですから、6の2分の1で3になります。
【ハンディ】＝（-1）+8+7+6/2＝17
【グロススコア】：92、 【ハンディキャップ】：17、【ネットスコア】：75



上の査定表を使ってみましょう。この例ではグロススコアが92ですのため、調整スコア「-1」を取り出します。92では「最悪スコア2つ+次に悪いスコアの1/2」ですから、最悪スコア2つは、11番ホールの8と五番ホールの7になります。次に悪スコアの1/2は6ですから、6の2分の1で3になります。

【ハンディ】＝（-1）+8+7+6/2＝17
【グロススコア】：92、 【ハンディキャップ】：17、【ネットスコア】：75

このイベントのためにこんのキャロウェイ方式のほうが皆に平等です。従って、利用されるソフトがいくつかの隠しホールを設定することであります。




  • SKIPPING

  • SLIDING 

  • OVERHAND THROW 

  • TWO-HAND STRIKING 

  • GREEN BOWLING 

  • PHYSICAL FITNESS SCREENING 

  • VERTICAL JUMP 

  • STANDING BROAD JUMP 

  • SEATED CHEST PASS 

  • SIT-UP AND THROW TEST 

  • PUSH/PULL SCREEN 

  • CORE STABILITY SCREENING 

  • 505 AGILITY TEST 

  • 505 AGILITY TEST

  • 505 AGILITY TEST

  • FUNCTIONAL MOVEMENT SCREENING 

  • THE FUNCTIONAL MOVEMENT ASSESSMENT 

  • ​MULTI-SEGMENTAL FLEXION

  • MULTI-SEGMENTAL EXTENSION 

  • MULTI-SEGMENTAL ROTATION 

  • SINGLE LEG STANCE 

  • OVERHEAD DEEP SQUAT 

  • HEIGHT MEASUREMENT 

​



ONLINE   CLASS ROOM

1. Introduction to golf
  • The game of golf
  • History of golf, and other facts and figures
  • What makes up a golf course?
  • Info on clubs and balls, are other necessary equipment
  • What do you need in your Golf Bag?
  • Golfing Terminologies & definitions
  • Common Golf Shots
2. How to learn
  • Laws Principles and preferences
  • Sequence of swing development
  • Taking lessons
  • How to practice
  • Are you fit enough for golf (Physical fitness)
3. Learn about the "How to do" of golf
  • How to choose the best clubs for you
    • Clubs for beginners
    • Clubs for intermediate players
    • Clubs for Advanced players
  • What types of games
  • Scoring systems; how to score & to use a score card correctly
  • Summary of the Basic rules & etiquette
4. Drills and practice tips on how to improve
  • Improved impact and general ball flights
  • In-swing & Pre-swing fundamentals factors
  • Putting
  • Chipping
  • Pitching
  • Bunker play
  • Full swing: Tee ground & fairway
  • Hitting from undulating lies
  • Intentional ball flights
  • What is a Pre-Shot Routine
  • Basic strategies for playing the game of golf