Post by dubiousgolfer on Jun 27, 2019 6:51:13 GMT -5
Dr Mann
Just found some articles by 'mandrin' and wondering whether you have seen these before?
The last article link below (imho) seems to be modelling a PA#5 accumulator
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There are also some other interesting articles:
www.angelfire.com/realm/moetown/mandrin/golf/RELEASE_MYTH_REAL_1.html
www.angelfire.com/realm/moetown/mandrin/golf/Homer_Kelley_1.html
www.angelfire.com/realm/moetown/mandrin/golf/CF_Cp_release.html
www.angelfire.com/realm/moetown/mandrin/golf/shortening_of_down_swing_radius.html
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There seems to be different opinions about what constitutes a hitting action in the golf swing:
Homer Kelley
Dominant PA#1
Tutelman
I'd like to take this opportunity to state very specifically what I mean later in these notes by the terms hitter and swinger. Most clubfitters and many instructors make this distinction, but it tends to be intuitive and imprecise. I believe that:
A swinger is a golfer who depends exclusively on centrifugal force for clubhead speed, and adds no wrist torque during the downswing except that needed to hold a 90º wrist cock.
A hitter is a golfer who depends to some extent on torque applied to the club's grip via the hands and the wrists.
Of course, there are few pure swingers and no pure hitters. But, comparing two golfers, we now have a way to say which one is more of a hitter and which more of a swinger. And, in fact, we can tell from this whether a golfer is primarily a hitter or a swinger.
Mandrin
The creation of a straight hand path using downwards thrust forces on the arms/hands until release (but without any detailed biomechanics to explain how a real golfers body can do this).
"To give some flesh and blood to the model one can think of the hook catching on to the pin as being the trail elbow hitting the front or side of the hips. This is than rather similar as in the pics of Ben Hogan posted by Peter. In general think of it as directing the hands straight towards some aiming point - eventually it has to resort to a more circular path
He seems to be implying that the right elbow will act as a pivot point when the hands move on a more curved path to evoke release of PA#2.
Note sure about these comments :
1- Trail forearm in line with clubshaft. This is very important for the SA golfer right from address position and for all good golfers nearing impact. It can be intuitively seen immediately that having the trail arm mass aligned with the clubshaft increases its effective mass (M1).
I haven't got a clue what he's talking about !!
-2- Instructions such - vertical drop into slot, getting trail elbow against hip, TGM’s straight line delivery are related to obtaining a sharp transition point hence increasing k, the flail boost factor.
-3- The instruction to make a slow, heavy, deliberate and continuous thrust with the trail side can be seen in two ways to increase the k factor.
a) A slow deliberate start makes it easier to obtain a straight line delivery for the trail side favoring a sharp well defined transition point.
Unsure why it should be slow vs fast . Surely a faster clubhead speed in that straight line phase will mean an increased clubhead speed as it turns the corner ! Maybe a smooth non jerky accelerating thrust is what he meant.
b) It promotes connectivity in the trail side augmenting the effective mass (M1) behind the mass at the transition point
Haven't got a clue what he means here!!
Addendum: I now think he means that the right side of 'upper torso/arm/club' unit thrusts down together as a rigid unit (effective mass would be the sum of its parts and therefore greater in size).
-3- Yoda’s instruction - Per 1-L-15, the Club starts Up-and-In after Low Point, but the Thrust continues Down Plane, when put into the light of human reaction time, helps producing a sharper defined transition point, BEFORE IMPACT, resulting in a larger k value.
I think he means that an intent to continue to thrust post impact might indirectly create a sharper change in hand path . A personal opinion !
-4- Maintaining pressure on the shaft through impact, e.g., TGM, Mindy Blake’s pressure swing, etc., due to reaction time can be seen to really operate earlier on in the downswing and as above through better connectivity increase the effective mass of M1.
Not sure what he means by better connectivity and how that can increase effective mass M1.
Addendum: I think I understand what 'better connectivity' means (ie. body parts connected and moving together as a single unit). So does continuous pressure on the shaft in the early downswing prevent disconnection of the club's mass from the 'right upper torso/arm' rigid unit? Unsure
DG
Just found some articles by 'mandrin' and wondering whether you have seen these before?
The last article link below (imho) seems to be modelling a PA#5 accumulator
-----------------------------------------------
There are also some other interesting articles:
www.angelfire.com/realm/moetown/mandrin/golf/RELEASE_MYTH_REAL_1.html
www.angelfire.com/realm/moetown/mandrin/golf/Homer_Kelley_1.html
www.angelfire.com/realm/moetown/mandrin/golf/CF_Cp_release.html
www.angelfire.com/realm/moetown/mandrin/golf/shortening_of_down_swing_radius.html
-------------------------------
There seems to be different opinions about what constitutes a hitting action in the golf swing:
Homer Kelley
Dominant PA#1
Tutelman
I'd like to take this opportunity to state very specifically what I mean later in these notes by the terms hitter and swinger. Most clubfitters and many instructors make this distinction, but it tends to be intuitive and imprecise. I believe that:
A swinger is a golfer who depends exclusively on centrifugal force for clubhead speed, and adds no wrist torque during the downswing except that needed to hold a 90º wrist cock.
A hitter is a golfer who depends to some extent on torque applied to the club's grip via the hands and the wrists.
Of course, there are few pure swingers and no pure hitters. But, comparing two golfers, we now have a way to say which one is more of a hitter and which more of a swinger. And, in fact, we can tell from this whether a golfer is primarily a hitter or a swinger.
Mandrin
The creation of a straight hand path using downwards thrust forces on the arms/hands until release (but without any detailed biomechanics to explain how a real golfers body can do this).
"To give some flesh and blood to the model one can think of the hook catching on to the pin as being the trail elbow hitting the front or side of the hips. This is than rather similar as in the pics of Ben Hogan posted by Peter. In general think of it as directing the hands straight towards some aiming point - eventually it has to resort to a more circular path
He seems to be implying that the right elbow will act as a pivot point when the hands move on a more curved path to evoke release of PA#2.
Note sure about these comments :
1- Trail forearm in line with clubshaft. This is very important for the SA golfer right from address position and for all good golfers nearing impact. It can be intuitively seen immediately that having the trail arm mass aligned with the clubshaft increases its effective mass (M1).
I haven't got a clue what he's talking about !!
-2- Instructions such - vertical drop into slot, getting trail elbow against hip, TGM’s straight line delivery are related to obtaining a sharp transition point hence increasing k, the flail boost factor.
-3- The instruction to make a slow, heavy, deliberate and continuous thrust with the trail side can be seen in two ways to increase the k factor.
a) A slow deliberate start makes it easier to obtain a straight line delivery for the trail side favoring a sharp well defined transition point.
Unsure why it should be slow vs fast . Surely a faster clubhead speed in that straight line phase will mean an increased clubhead speed as it turns the corner ! Maybe a smooth non jerky accelerating thrust is what he meant.
b) It promotes connectivity in the trail side augmenting the effective mass (M1) behind the mass at the transition point
Haven't got a clue what he means here!!
Addendum: I now think he means that the right side of 'upper torso/arm/club' unit thrusts down together as a rigid unit (effective mass would be the sum of its parts and therefore greater in size).
-3- Yoda’s instruction - Per 1-L-15, the Club starts Up-and-In after Low Point, but the Thrust continues Down Plane, when put into the light of human reaction time, helps producing a sharper defined transition point, BEFORE IMPACT, resulting in a larger k value.
I think he means that an intent to continue to thrust post impact might indirectly create a sharper change in hand path . A personal opinion !
-4- Maintaining pressure on the shaft through impact, e.g., TGM, Mindy Blake’s pressure swing, etc., due to reaction time can be seen to really operate earlier on in the downswing and as above through better connectivity increase the effective mass of M1.
Not sure what he means by better connectivity and how that can increase effective mass M1.
Addendum: I think I understand what 'better connectivity' means (ie. body parts connected and moving together as a single unit). So does continuous pressure on the shaft in the early downswing prevent disconnection of the club's mass from the 'right upper torso/arm' rigid unit? Unsure
DG