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+--- Thread: Rafa Nadal (/thread-3323.html)
Re: Rafa Nadal - LP - 09-10-2019
(09-10-2019, 06:04 AM)flyboy77 link Wrote:You're clutching at straws LP, but keep firing t hem blanks....
So LP's Law of Physics suggests every pro tennis player is working off a placebo effect!
I'll give you one word to ponder LP (by way of analogy) - see how you go...
Trampoline!
A so ends the argument at an appropriate level.
I thought the laws of physics were everybody's, I didn't realise you, Houdini and L. Ron Hubbard had something in common!
Here is a great primer for the basics if you want to really learn something instead of sprouting marketing spin and old wives tales!
https://www.comsol.com/blogs/the-physics-of-tennis-racket-sweet-spots/
Re: Rafa Nadal - flyboy77 - 09-10-2019
(09-10-2019, 12:01 PM)LP link Wrote:A so ends the argument at an appropriate level.
I thought the laws of physics were everybody's, I didn't realise you, Houdini and L. Ron Hubbard had something in common!
Here is a great primer for the basics if you want to really learn something instead of sprouting marketing spin and old wives tales!
https://www.comsol.com/blogs/the-physics-of-tennis-racket-sweet-spots/
I'll read it later. First pass - it doesn't support anything you've said thus far.
Re: Rafa Nadal - flyboy77 - 09-10-2019
This is far better LP.
https://tt.tennis-warehouse.com/index.php?threads/why-do-larger-racquets-have-more-power.473525/
There's a good summation by a poster called ChicagoJack in the middle of the thread....
I reckon you're related to a poster called LeeD
And note the link to a test that the once, almost great, Scud did back when....
Re: Rafa Nadal - LP - 09-10-2019
(09-10-2019, 09:10 PM)flyboy77 link Wrote:This is far better LP.
https://tt.tennis-warehouse.com/index.php?threads/why-do-larger-racquets-have-more-power.473525/
There's a good summation by a poster called ChicagoJack in the middle of the thread....
I reckon you're related to a poster called LeeD
And note the link to a test that the once, almost great, Scud did back when....
Except that many of the claims in the blog thread are completely wrong.
The proponents of bigger heads assume the coefficient of restitution is constant when you change the racquet head size to deliver a bigger amplitude bounce in the same time. But restitution is a time based dynamic effect. A bigger racquet may have more deflection/deformation, but that will happen at a cost, the restitution happens over a longer time interval meaning it's less energetic, and also there is more energy lost in harmonics due to the larger available area. The trampoline effect, the bigger the trampoline, the slower it recovers!
However spin might be helped by bigger racquets, a feature unrelated to power transfer. This is because a lower COR allows the ball to remain in contact with strings longer, which is one of the critical features when trying to imparting spin. Getting the balance right between COR and string tension would be critical to maximise spin.
It's pretty basic really.
You shouldn't trust links and debates on sites connected to commercial enterprises for technical explanations, they nearly always spin he data to suit their product push.
Better to go to a more reputable source of the info; http://www.physics.usyd.edu.au/~cross/tennis.html
Re: Rafa Nadal - flyboy77 - 09-10-2019
There's a big difference between theory and practice!
At a practical level, even for the pros, the sweet spot on the racquet face on a bigger racquet is larger as you have agreed (I think).
Therefore, the chance of losing power (or as a % of loss of power) by hitting outside the sweet spot must be lessened - or conversely, with a smaller bat and sweet spot, the chances of a dud shot is higher i.e. the racquet is less forgiving.
And your physics discounts entirely, it would appear, the effects of leverage - the arm length, the swing arc and indeed, the length of the bat....that is why a tennis player never impacts the ball with his/her racquet at your so called 'best bounce spot'.
A racquet is not "freely suspended by a long length of string or balanced vertically on the end of its handle."
LP. you're not a climate change modeller are you?
Re: Rafa Nadal - LP - 09-11-2019
(09-10-2019, 10:56 PM)flyboy77 link Wrote:LP. you're not a climate change modeller are you?
No, but I gather you're a skeptic!
Changing the physical dimensions of the player doesn't change the physics of the racquet! ;D
Do you sell tennis equipment for a living?
I'll send you a Energy Polarizer and some special crystals, if you stick them in the handle or every racquet player performance will increase exponentially with every practice session!
The best advice any sporting person can be given, in relation to sports that use bats, racquets, paddles, cues, sticks, whatever. When you find a good one never change it, make it last as long as possible because changing kit just adds another variable and the user is already variable enough!
Re: Rafa Nadal - PaulP - 12-15-2020
Better late than never. With Rafa's win in the 2020 French Open, he and Federer tie at 20 slams apiece. The GOAT is thrown wide open yet again IMO. 13 Majors at one tournament is off the charts.
Re: Rafa Nadal - Thryleon - 12-15-2020
More impressive. Rafa has had to knock off Federer and djokovic along the way to his other 7 majors.