confused w/ the term "MTM"

[sureshs]

Originally Posted by toly

If racquet velocity has normal component only (normal to string bed) and point of contact is sweet spot, you hit pure flat FH (forget about strings actions). Because of the absolute symmetry of the ball there always should be solid contact.
If racquet speed has tangential component only, there never will be solid contact.

Not that simple, because it implies that for any ball, if you want to send it somewhere, you can have the same swing path and the normal component of the force will take care of what you need. That does not happen in practice due to the incoming spin and trajectory of the ball. If you want to send the ball somewhere and it is spinning away, you have to adjust the swing to counteract the topspin, or go with it, depending on what you desire. A ball with no pace and spin needs to be treated differently from one with speed or spin, and the second is not always more difficult, because you can use the incoming pace and spin to advantage. These are the details which the pros handle unconsciously, and are hardly ever discussed in the tennis videos.

[toly]

Originally Posted by sureshs

Not that simple, because it implies that for any ball, if you want to send it somewhere, you can have the same swing path and the normal component of the force will take care of what you need. That does not happen in practice due to the incoming spin and trajectory of the ball. If you want to send the ball somewhere and it is spinning away, you have to adjust the swing to counteract the topspin, or go with it, depending on what you desire. A ball with no pace and spin needs to be treated differently from one with speed or spin, and the second is not always more difficult, because you can use the incoming pace and spin to advantage. These are the details which the pros handle unconsciously, and are hardly ever discussed in the tennis videos.

Yes, the racquet collision with spinning ball is much more complicated.

[julian]

Originally Posted by toly

If racquet velocity has normal component only (normal to string bed) and point of contact is sweet spot, you hit pure flat FH (forget about strings actions). Because of the absolute symmetry of the ball there always should be solid contact.
If racquet speed has tangential component only, there never will be solid contact.

A ball is NOT symmetric at the contact-see some pictures at the contact time

[5263]

"tangential contact and abrupt sideways" are made up by those trying to prove the
impossible; that there is no across aspect to contact that is causing the normal
side aspect we see on normal high level rally Fhs.
Nobody that is sharing the fact, "that there is an across aspect normally to the strokes",
uses either of those terms to describe the action.
Not sure why those 2 straw men continue to show up unless it is the usual shell
game of distraction or an aspect of denial?
Probably right on the OP of why the term MTM is not understood.

[toly]

Originally Posted by julian

A ball is NOT symmetric at the contact-see some pictures at the contact time

I’m not going to argue about that, since it is true.

[julian]

Originally Posted by toly

I’m not going to argue about that, since it is true.

So why the "absolute symmetry of the ball" was brought into the discussion?
I do NOT understand the phrase "solid contact" either
Does "solid contact" mean collision of a rigid body with a rigid body?

[toly]

Originally Posted by julian

So why the "absolute symmetry of the ball" was brought into the discussion?
I do NOT understand the phrase "solid contact" either
Does "solid contact" mean collision of a rigid body with a rigid body?

We were talking about solid contact of the racquet with ball.

In post 519 I said, “If racquet velocity has normal component only (normal to string bed) and point of contact is sweet spot, you hit pure flat FH (forget about strings actions). Because of the absolute symmetry of the ball there always should be solid contact.
If racquet speed has tangential component only, there never will be solid contact.”

What is wrong with that?

If carpenter wants to hammer a nail, he also should create only normal component of the hammer velocity to get solid contact, but is not enough, because the nail doesn’t have absolute symmetry. The normal component of velocity must coincide with longitude axis of the nail to provide solid contact.

[julian]

Originally Posted by toly

We were talking about solid contact of the racquet with ball.

In post 519 I said, “If racquet velocity has normal component only (normal to string bed) and point of contact is sweet spot, you hit pure flat FH (forget about strings actions). Because of the absolute symmetry of the ball there always should be solid contact.
If racquet speed has tangential component only, there never will be solid contact.”

What is wrong with that?

If carpenter wants to hammer a nail, he also should create only normal component of the hammer velocity to get solid contact, but is not enough, because the nail doesn’t have absolute symmetry. The normal component of velocity must coincide with longitude axis of the nail to provide solid contact.

I am bringing to your attention that the parallel with a hammer/nail is very "weak"
The nail and hammer are rigid bodies.
A ball and strings are at the different end of the spectrum.
Additionally there are multiple problems with a dictionary/choice of words
for example I do NOT know the meaning of the phrase "solid contact"
Btw:the "if statement" with the the first part of the "if clause" false is always true.
I am talking about the sentence starting with "because"

[toly]

Originally Posted by julian

I am bringing to your attention that the parallel with a hammer/nail is very "weak"
The nail and hammer are rigid bodies.
A ball and strings are at the different end of the spectrum.
Additionally there are multiple problems with a dictionary/choice of words
for example I do NOT know the meaning of the phrase "solid contact"
Btw:the "if statement" with the the first part of the "if clause" false is always true.
I am talking about the sentence starting with "because"

I'm sorry. I'm a foreigner, so my English is not good enough to clearly express some ideas, but I tried my best.

[5263]

Originally Posted by JohnYandell

I repeat. You have zero credability. Just go back to crashing navy jets.

Just to clear something up here. I got a couple of emails asking about this.

If JY has any credibility on this above, he is making a play on the ole adage that
Navy Jets don't land on carriers, but instead execute controlled crashes to the
deck. Let's just hope that was his meaning, as I've never costs the tax payers
a cent by crashing a jet or helo, but have saved big $$,
by safely returning aircraft with major emergencies. Notice I give him the benefit of the doubt, although
he makes these negative comments on my credibility with the poorly worded attempt above.
I do think the comment is disrespectful to all who have sacrificed greatly to
serve this country, as well as those of us who continue to serve.

[JohnYandell]

Well thank god you didn't actually crash one. I can sleep now. No go somewhere and wave the flag for mtm.

[DoctorBackhand]

Originally Posted by JohnYandell

Well thank god you didn't actually crash one. I can sleep now. Wave the flag for mtm.

Your getting way too personal for an argument over tennis methodologies. Chill out.

[kiteboard]

My uncle had pictures of all the planes he crashed, and walked away from in WW II. Planes in the dirt, in the sand, in the trees, riddled with bullets, and flame, and nothing seemingly wrong with them outwardly other than collapsed wheel housing. My father spent the war in an iron lung, TB, coughing his lungs out for days on end..... My other uncle lost his eye in a tank battle in France with the Nazis who then moved to Argentina. Although tennis is symbolic war, as is every sport, maybe a reason that wars between larger nations are not happening anymore. Endorphins upon the arena are medicine for those who wield the missiles/tanks/ships. I can't say that tennis has stopped me from killing anyone, but it has delayed me from doing so! Wife and customer anger has caused me to "kill" many a practice partner.

For all those posters who wage "war" against each other here, I say time heals all wounds, even those at Normandy... Saw some graffiti on the grave of an American there, and it said, in French, "Take your trash home." Now that's a fellow I'd like to meet and hit him with a tennis racquet or two.. Maybe we should have stayed out of it and let France speak German. Only, it would not have been just France. It would have been Norway, and Sweden, and England, and Luxembourg, and Poland, and etc. I find it strange, that anyone in France, would feel that way about Americans, when my own family bled for them, and didn't have to.

Seems to be an awful lack of gratitude in the world in general. Especially for those who actually do help us improve our games on this site. I'd say, "Thank you.", is more in order for many than the usual disrespectful argument. Yandell is one of those. So, thanks Johh, for helping me.

[JohnYandell]

Doctor BH,

Why don't you just worry about your posts and I will worry about mine. "Chill" people are overrated.

[JohnYandell]

K-Board,

You're welcome and I have enjoyed our collaboratiion--btw I've got that new aussie poly string Tomic plays with for you to try...

[kiteboard]

I'd love to try flex infinity. Want to try the five sided one and the 1.15mm one. Supposed to have great tension loss, and similar poly performance. I see they used the video from one of your pieces of the sideways forehand Peter Mcg. hit in San Diego. http://www.flexinfinity.com/strings/video

Got my winnings today from the singles tournament I won. Scheduled to play another mid month. Hunter G. will be there. Going to practice sequences, lull x 3 cc, and jam x 1 dtl, and finish x 2 cc. Jam x 3 cc/cc, and finish x 1 dtl. Some guys are more susceptible to lull-finish than just lull-jam-finish.

[Ash_Smith]

^^^ "lull"? "jam"?

[arche3]

Originally Posted by Ash_Smith

^^^ "lull"? "jam"?

It's a melding of mtm and yandel method. Kind of like being a Jedi.

[treblings]

my favourite practice sequence is the otn&itc-alan variation, imitating the western african grasshopper(male), whilest balancing my inner and outer tp to achieve maximum cs. only downside being, that my socks are stinking after a typical training session oh, well....

[tennis_balla]

Originally Posted by Ash_Smith

^^^ "lull"? "jam"?

Ash, DON'T!!

http://www.youtube.com/watch?v=2WNrx2jq184