37 replies to this topic

[Fairwayman]

⛳️. MSwingers thank you for the putting and everything else in this update ⛳️.

[andygev35]

The [MS] swing meter dropdown is now nonexistent and buttery smooth...  THANK YOU AJ, MJ, AND ALL THE DEVS!!!

[mebby]

andygev35, on 01 Jul 2015 - 1:03 PM, said:

The [MS] swing meter dropdown is now nonexistent and buttery smooth...  THANK YOU AJ, MJ, AND ALL THE DEVS!!!

Good to hear.  I'm out of town this week.  Can't wait to get back and try it out tomorrow night.

[andygev35]

One thing of note... when using a full wedge approach, high loft, over 100%, you get an extreme backwards bounce when the ball first lands on the green (even on a flat green) . It makes for a very un-natural looking shot.  Shouldn't the ball's initial bounce angle be inversely proportional to the angle at which it impacted the green?

[Pappy]

andygev35, on 01 Jul 2015 - 2:02 PM, said:

 Shouldn't the ball's initial bounce angle be inversely proportional to the angle at which it impacted the green?

Get the slide rule out (some of the younguns prob never seen one)

[mebby]

andygev35, on 01 Jul 2015 - 2:02 PM, said:

One thing of note... when using a full wedge approach, high loft, over 100%, you get an extreme backwards bounce when the ball first lands on the green (even on a flat green) . It makes for a very un-natural looking shot.  Shouldn't the ball's initial bounce angle be inversely proportional to the angle at which it impacted the green?

I think it depends on the amount of spin the ball has and the angle at which it's approaching the surface.  If it's REALLY spinning and coming in nearly vertical then I would fully expect it to bounce backwards.

 

To use an exaggerated example - take a basketball (or any larger sized ball really) in your hands and toss it forward while spinning it backwards as hard as you can.  It will hit and bounce backwards.  The bounce is not even close to be inversely proportional to the angle that it impacted the green.

[andygev35]

mebby, on 01 Jul 2015 - 2:11 PM, said:

I think it depends on the amount of spin the ball has and the angle at which it's approaching the surface. If it's REALLY spinning and coming in nearly vertical then I would fully expect it to bounce backwards.

To use an exaggerated example - take a basketball (or any larger sized ball really) in your hands and toss it forward while spinning it backwards as hard as you can. It will hit and bounce backwards. The bounce is not even close to be inversely proportional to the angle that it impacted the green.

While there is some merit to your statement, your analogy doesn't really compare. The surface of a golf ball is much less "grippy" than that of a basketball, coupled with the lesser surface deflection (flattening) at impact with the ground, there should never be a "backwards rubber ball bounce" effect. My intent wasn't to start a physics debate, just pointing out an unnatural-looking shot I experienced.

[mebby]

andygev35, on 01 Jul 2015 - 2:40 PM, said:

While there is some merit to your statement, your analogy doesn't really compare. The surface of a golf ball is much less "grippy" than that of a basketball, coupled with the lesser surface deflection (flattening) at impact with the ground, there should never be a "backwards rubber ball bounce" effect. My intent wasn't to start a physics debate, just pointing out an unnatural-looking shot I experienced.

OK - fair enough.  I stated that my example was exaggerated.

 

I haven't seen the shot that you're talking about - I'd probably agree with you after seeing it though.

[andygev35]

Overall though, I must admit that the 1.3.4.0 is most definitely a step in the right direction.

[AwYea]

Fix to the swing meter is HUGE! Improves MS 100%. 

[Charles]

Well! I'll be darned! They fixed it! They've fixed the 'kick-back'/'drop-down' issue!! Fabulous!!! Thanx PG-men! It's really gone! Well done! Goodness, how long I've had to wait for this tweak. I thought it had something to do with my graphics etc. Whatever, it's gone and I never want to see it again. Boy, this feels great. Like a stone in my shoe has been removed. MS is perfect now as far as I can see. Now let the new linked-Ani come on!!! I can't wait!!!

[Ted_Ball]

andygev35, on 01 Jul 2015 - 2:02 PM, said:

One thing of note... when using a full wedge approach, high loft, over 100%, you get an extreme backwards bounce when the ball first lands on the green (even on a flat green) . It makes for a very un-natural looking shot.  Shouldn't the ball's initial bounce angle be inversely proportional to the angle at which it impacted the green?

 

I encountered this too. It seemed to be only on one course and one hole. It was bouncing back from the fringe and mounds around the green as well. I should have made a note of the hole. Probably The Swan. Next time.

[Andrew]

Here is a small section from the physics paper written on the subject matter

Professional golfers will often strike the golf ball with significantly greater club-head speed thanthe 40 m/s used in the above example. The golf ball will, therefore, in these cases, have much greaterbackspin on landing. In addition skilled golfers will often adjust their swing and their position relativeto the ball to be able to increase the amount of backspin given the golf ball. The amount of backspinis the dominant factor in determining the behaviour of the run of a golf ball for the higher lofted irons.For example, Fig. 7 shows the effect backspin has on the run of a golf ball in the case of the above9-iron shot with the impact speed of 23.8 m/s, impact angle of 34.0◦, and with impact spins of 809rad/s, which was calculated for the 40 m/s club-head speed, along with the higher backspin values of1000 and 1200 rad/s. As is seen, the effect of the increased backspin is to increase the amount the golfball bounces and rolls backwards. The values of µcfor the 809, 1000, and 1200 rad/s backspins are0.28, 0.33, and 0.38, respectively. Therefore, as a value of 0.40 for µ was used, the golf balls will berolling out of the first bounce for all three cases and (3) will apply. However, as the balls initially bouncebackwards they will have backspin when they strike the turf the second time. Equation (3) will again....

 

In this extreme example the ball actually loses all its backspin and enters the roll state, but still had enough grip to bounce backwards thus resulting in backspin on the ball when it was coming back to the golfer not top spin.  

 

In almost all cases where a golf ball spins back the final bounce will be backwards.  But backspin (as perceived by us can come from two different paths

 

1) Where the ball still has backspin on it when its horizontal velocity reaches 0 thus when entering the roll state it moves back towards the player

2) Where the ball impacts the green and the conditions cause it to bounce backwards with either residual backspin or forward spin.  

[Andrew]

Charles, on 01 Jul 2015 - 3:57 PM, said:

Well! I'll be darned! They fixed it! They've fixed the 'kick-back'/'drop-down' issue!! Fabulous!!! Thanx PG-men! It's really gone! Well done! Goodness, how long I've had to wait for this tweak. I thought it had something to do with my graphics etc. Whatever, it's gone and I never want to see it again. Boy, this feels great. Like a stone in my shoe has been removed. MS is perfect now as far as I can see. Now let the new linked-Ani come on!!! I can't wait!!!

We did that at the last minute...

[PurpleTurf]

I think Andygev35 is referring to backwards bounce, not backspin.  Ive seen it a few times.  Most of the time into headwind on breezy/gusty.  But the bounce can actually land on level or fairly level green and bounce back (on one bounce)about 10-15 feet even before a spin.  Ive also seen it spin after the bounce when it starts to grip the green.

My guess is this is due to wind more than any physics of the green but I dont play on calm so unsure if this happens in calm conditions.  Have to catch a video of it next time I see it.

[jmk59]

Andrew,

When you have time, can you please post a link to the reference.  As an engineer, I find the bits of information in these technical references sometimes helps my PG game.  Also...enjoying the new 3C putting so far.

Thanks

[Keith]

Anyone else seeing a sparkling effect in trees @Willow Heath since the update?

[Splash]

Keith, on 02 Jul 2015 - 01:05 AM, said:

Anyone else seeing a sparkling effect in trees @Willow Heath since the update?

Yes played today and its there. Nothing crazy bad but yes it's there.

[Splash]

PurpleTurf, on 01 Jul 2015 - 11:26 PM, said:

I think Andygev35 is referring to backwards bounce, not backspin.  Ive seen it a few times.  Most of the time into headwind on breezy/gusty.  But the bounce can actually land on level or fairly level green and bounce back (on one bounce)about 10-15 feet even before a spin.  Ive also seen it spin after the bounce when it starts to grip the green.

My guess is this is due to wind more than any physics of the green but I dont play on calm so unsure if this happens in calm conditions.  Have to catch a video of it next time I see it.

Ditto on the bounce, I've had it happen too. But It also seems first bounce or contact with ground is a little to bouncy, rubberball 'ish kinda. Its just what my eye is seeing, just informing that's all.

[lefty1948]

Very happy with all aspects of this update except, I feel

the slow meter cutoff should be 15 ft. instead of 10 ft.