I think of impact interval as a circular motion by the club. The motion of the ball is a little more complex I guess. After all, the ball is being quite deformed and doesn't get back to normal shape before it's in the air.
I'm not sure what Homer said about a perfectly straight shot. But based on his impact drawings in ch two, i would say that a straight shot with as perfect as it gets compression would require a vertical hinge. Becaus a horisontal hinge would impose the rotation rate of the hinge itself on the ball. So even though we assume that separation occurs at low poing and club face pointing towards target it will be a small draw. But we are perhaps talking so small that it isn't even measurable.
Seems very reasonable to me. I would have thought an angled hinge so I have to think about vertical now.
Originally Posted by BerntR
There could be a little of both here. The part of the ball that sticks to the club face could be carried down and to the right, while the part furthest away from the line of compression move up and towards the inside of the club face. This is just a excample as I know very little about how the ball behaves during impact in detail. But there's no doubt that there is som serious redistribution of mass going on in the ball during impact. Elastic deformation. Of course, how the ball deforms and how it recovers will have an impact on the ball flight.
Sounds perfectly reasonable to me and makes sense as a possible outcome.
Originally Posted by BerntR
Perhaps we should talk about elastic deformation, energy storage and elastic recovery instead. I bet the makeup of the ball can make a difference here.
Yea, certainly a field of study I need to learn more about to have real technical discussion on the subject. Any ideas on sources of information on this area of study?
I'm not sure what Homer said about a perfectly straight shot. But based on his impact drawings in ch two, i would say that a straight shot with as perfect as it gets compression would require a vertical hinge. Becaus a horisontal hinge would impose the rotation rate of the hinge itself on the ball. So even though we assume that separation occurs at low poing and club face pointing towards target it will be a small draw. But we are perhaps talking so small that it isn't even measurable.
Per 2-D-0
Quote:
"The direction of the ball will be the resultant of the Vectors of the forces acting on the ball, unless all the forces can be focused on one line (2-C-1 #3). Then direction control would be stabilized and, in addition, the ball would be propelled by the sum of the forces acting on it, instead of the much smaller Resultant Force of scattered Vectors. The Vector of the spin-producing force cannot be brought into the alignment or there would be a loss of altitude control as well as Spin control. But the Spin can be produced on the plane of the actual Line of Flight and thus exert no interference with the alignment of the forces. Study text and sketches in 2-B and 2-C."
Quote:
2-C-1 #3
"This is designated the "Ideal Application because it produces perfect Vector alignments because the Angled Clubshaft and the Closing Clubface (the "Full Roll" of Horizontal Hinge Action --7-10) are rotating around the same center and there is no glancing force except for backspin".
In other words 2-C-1 #3 shows;
- nearly total compression except for backspin provided by loft
-the point of contact between clubface and ball staying together as if welded together. Made possible by a uniform rotation of the clubface (the Horizontal Hinge Action) and clubhead arc given that they are both rotating around the same center. Not so with Vertical.
-a straight shot, no divergence in face angle and line of compression.
Quote:
2-C-0
Between the precision Impact of 2-C-1 #3 and the total loss of compression in 2-C-3 #3 there can be every degree of Compression Loss Leakage ---some intentional (Backspin) but mostly unintentional.
Vertical Hinging, what Homer termed a "cut shot" is outlined in drawing 2-C-2 and if its associated loss of compression is "unintentional" as mentioned above then it must be a reference to "Steering", The Number One malfunction. Holding the clubface square to the Target Line.
Vertical Hinging though useful around the green is not good for a driver shot where you need as much compression as you can muster. It could in a way, be considered "intentional steering" when employed deliberately around the green. The geometry of compression loss can be made to work for you, when you need it and that we see on t.v. ALL THE TIME.
So I do think that Hinge Action is very real especially when you see all these guys on tour , who have probably never heard it's name, employ it.
-a straight shot, no divergence in face angle and line of compression.
Yes; no divergence in face angle and line of compression. But side spin is imposed on the ball by the hinge action(s). This is probably close enough to be "pracically straight" though.
Yes; no divergence in face angle and line of compression. But side spin is imposed on the ball by the hinge action(s). This is probably close enough to be "pracically straight" though.
Or even "properly straight" as Daryl said he appreciated?
Yes; no divergence in face angle and line of compression. But side spin is imposed on the ball by the hinge action(s). This is probably close enough to be "pracically straight" though.
I agree in that I certainly see a draw tendency myself but Lynn has always maintained that any Hinge Actions when properly executed will create straight away ball flight. Properly executed is the key word there. There may be face angle and plane line adjustments needed to accomplish that for Angled or Vertical. Lynn said he was going to get back to us on that one and the drawings of 2-C as well. That'll be a great post.
As an aside its interesting to me that Homer didnt actually used the term "side spin". He was ahead of his time in that he considered the curve producing spin to be what he termed "tilted backspin" 2-E or "non vertical spin" 2-D.
Quote:
2-E
".....If the Line of Compression (LOC) is not on the Vertical Centerline , the backspin will be titlted per 2-B. This tilt ---- Proportional to the divergenence of those Impact alingments ----- gives the only directional manipulation available (2-D, 7-2).
Linear Mode
