|
|
Post by volleydadtx on Jul 10, 2021 15:27:40 GMT -5
Machine or not, you can't land a 41-43 mph float with anything less than a 9 foot release. Post a like to a video of those 41 mph jump floats. THIS I am excited to see! Her reach is 7 feet 9 inches and her average serve jump is about 21 inches. Feel free to do the math for the contact point =)
I'll look forward to seeing that girl on TV someday soon! |
|
|
|
Post by silverchloride on Jul 10, 2021 15:29:59 GMT -5
You would be incorrect sir. 21 aces at Red Rock. I am certain about the speeds. She is not a machine though, and that might account for your discrepancy =) Machine or not, you can't land a 41-43 mph float with anything less than a 9 foot release. Post a like to a video of those 41 mph jump floats. THIS I am excited to see! Her reach is 7 feet 9 inches and she averages a 21 inch jump on her serve. Feel free to figure out contact point.
Oops, posted it twice by accident.
|
|
|
|
Post by silverchloride on Jul 10, 2021 15:31:55 GMT -5
Her reach is 7 feet 9 inches and her average serve jump is about 21 inches. Feel free to do the math for the contact point =)
I'll look forward to seeing that girl on TV someday soon! It is looking very likely =) |
|
|
|
Post by silverchloride on Jul 10, 2021 15:33:48 GMT -5
Is this one of the Red Rock teams that is serving jump floats @ 41 mph? I do not know. Curious why you chose Forza North. |
|
|
|
Post by silverchloride on Jul 10, 2021 16:16:20 GMT -5
Just to make sure, as this would not be the first time I was wrong, but she confirmed that her target speeds for a jump float serve is between 40 and 43 MPH.
|
|
|
|
Post by ZenScout on Jul 10, 2021 18:42:26 GMT -5
My DDs Club regularly uses a radar gun to clock speeds. Her target speeds for a float serve are between 41 and 43 MPH. That is for a jump float serve. That would be 25-30 percent faster than the upper range of college players. It would be physically impossible to land a float in bounds at 41-43 MPH with a release point anything under 9 feet. You can't bend the laws of physics. I suspect someone needs new batteries in their radar gun, or a new pair of glasses. Is it possible those speeds could be in kph? |
|
|
|
Post by volleydadtx on Jul 10, 2021 20:10:40 GMT -5
That would be 25-30 percent faster than the upper range of college players. It would be physically impossible to land a float in bounds at 41-43 MPH with a release point anything under 9 feet. You can't bend the laws of physics. I suspect someone needs new batteries in their radar gun, or a new pair of glasses. Is it possible those speeds could be in kph? that's my guess. Saying "my target for jump floats is 43 mph" is like saying "my target is to go to the Olympics." There's probably a couple dozen females in the country that could land a 43 mph float on the court, and I doubt it would happen very often. It would take a server that is literally hitting sharply down like an attack, well above the net at release. Imparting top spin on the ball, it's a completely different matter. You can get into the 40s with significant top spin and land it on the court. Another interesting fact is that in the women's game, the jump serve rarely yields a faster serve than a standing serve. Only elite women can execute a "power jump". Again, it's going to require an extremely high release. Tall player + high vertical + all the stars in alignment. But that ball will have top spin on it. |
|
|
|
Post by dodger on Jul 10, 2021 20:47:10 GMT -5
Is it possible those speeds could be in kph? that's my guess. Saying "my target for jump floats is 43 mph" is like saying "my target is to go to the Olympics." There's probably a couple dozen females in the country that could land a 43 mph float on the court, and I doubt it would happen very often. It would take a server that is literally hitting sharply down like an attack, well above the net at release. Imparting top spin on the ball, it's a completely different matter. You can get into the 40s with significant top spin and land it on the court. Another interesting fact is that in the women's game, the jump serve rarely yields a faster serve than a standing serve. Only elite women can execute a "power jump". Again, it's going to require an extremely high release. Tall player + high vertical + all the stars in alignment. But that ball will have top spin on it. A very interesting little study by you! A couple questions: brand of speed gun used? Placement of speed gun on court, height off of ground, distance from server, etc, etc.. Your math kph to mph: you reported: range of speeds from study that you calculated the mph from kph: on standing and jump, flost serve top kph reported was 61 kph per your quote: which is 37.9 mph: but you report different numbers per my memory: You put the height of throwing machine at release point of 7’5” ? |
|
|
|
Post by dodger on Jul 10, 2021 21:13:47 GMT -5
My DDs Club regularly uses a radar gun to clock speeds. Her target speeds for a float serve are between 41 and 43 MPH. That is for a jump float serve. The question is: what kind of radar gun used: location of radar gun: etc etc: a study done of woman's jump float serve serve done in a pro league tourney in Spain: 151 players served: 2056 serves evaluated, and measured with calculations when balls angle isn't directly at speed gun. The range of speed for these jump float servers was 24.8mph to 38.5mph. It would seem that the player your referring: isn't serving at the velocity’s your quoting unless its due to the way its being measured and vice versa: |
|
|
|
Post by volleydadtx on Jul 10, 2021 22:06:42 GMT -5
that's my guess. Saying "my target for jump floats is 43 mph" is like saying "my target is to go to the Olympics." There's probably a couple dozen females in the country that could land a 43 mph float on the court, and I doubt it would happen very often. It would take a server that is literally hitting sharply down like an attack, well above the net at release. Imparting top spin on the ball, it's a completely different matter. You can get into the 40s with significant top spin and land it on the court. Another interesting fact is that in the women's game, the jump serve rarely yields a faster serve than a standing serve. Only elite women can execute a "power jump". Again, it's going to require an extremely high release. Tall player + high vertical + all the stars in alignment. But that ball will have top spin on it. A very interesting little study by you! A couple questions: brand of speed gun used? Placement of speed gun on court, height off of ground, distance from server, etc, etc.. Your math kph to mph: you reported: range of speeds from study that you calculated the mph from kph: on standing and jump, flost serve top kph reported was 61 kph per your quote: which is 37.9 mph: but you report different numbers per my memory: You put the height of throwing machine at release point of 7’5” ? Yes I have no idea why these things fascinate me. Bushnell radar gun. Release @ 7.5 feet. I converted kpm to mph but I did round. The ball generally has reached its fastest point as it crosses the net. As it begins its descent, gravity starts slowing the ball. So the radar gun is to be pointed at the top of the net, on the receiving end of the court at the service line. The ball must be traveling directly toward the radar gun and the ball has to be measured as it crosses the net. Radar guns are very simple, and cheap devices, but used incorrectly, you don't get any sort of accurate result. Like taking your temp by sticking the thermometer in your belly button. One gun isn't going to read much different than the other. What got me going on this is the girl's dad said she needed to try to pass 40 mph serves. I said "fair enough let's do this!" Well I played around quite a while with the darn machine and I could get them to 40 mph easy peasy, but nothing that would stay on the court, even if they barely cleared the net. That alerted me "something's not adding up here". But when you look at the actual dimensions of the court, the MPH speed of the ball, and the very limited amount of time it has to drop to the floor, it becomes more easy to see why a 40 mph float in the women's game is almost impossible. 1. The net height is 88 inches 2. Let's assume a hard float clears the net by 12 inches. So the ball is 100 inches in the air. 3. A ball served at 40 mph is traveling 704 inches per second. 4. There are 354 inches to work with once the ball crosses the net, though slightly more if served at an angle to the corners. 5. The ball must fall 100 inches in half a second @ 40 mph. 6. Gravity would accomplish this if the ball was simply dropping, as the rate of gravity is 386 inches per second. 7. The ball is overcoming simple gravity briefly, before it begins descension. But with the 40 mph velocity, the ball now only has 1/4 of a second to hit the floor with no spin, and that's asking a lot. 8. At 40 mph with no top spin, the ball simply runs out of real estate before it falls to the floor. Now, one could experiment and try to release the ball 10 feet back from the serve line, in hopes that the ball begins its descent slightly before reaching the net, but I would think the success percentage of this would be very low. Of course, there are the "how fast can you reasonably serve" scenarios with a radar gun, and then "how hard can I serve and not get put on the bench" questions in actual games. Serves in actual games are generally going to be throttled back considerably, as it is more important to put a ball in play than to try to score a point with the serve. I think this is why, in actual competition, you see the averages in the low to mid 30s mph. So the next time someone says "Well Suzy is jump floating at 45 mph!". You need to say "Show me". |
|
|
|
Post by silverchloride on Jul 10, 2021 22:48:32 GMT -5
Just as a caveat, men serve much faster, and still get in the court, so it must be possible =)
Player Speed
1. Wilfredo Leon 134 km/h (83.26 mph)
2. Ivan Zaytsev 134 km/h (83.26 mph)
3. Matey Kaziyski 132.9 km/h (82.58 mph)
4. Ivan Zaytsev 130.9 km/h (81.34 mph)
|
|
|
|
Post by justahick on Jul 10, 2021 22:55:22 GMT -5
Just as a caveat, men serve much faster, and still get in the court, so it must be possible =) Player Speed 1. Wilfredo Leon 134 km/h (83.26 mph) 2. Ivan Zaytsev 134 km/h (83.26 mph) 3. Matey Kaziyski 132.9 km/h (82.58 mph) 4. Ivan Zaytsev 130.9 km/h (81.34 mph) These are top spin serves that have downward velocity at contact. |
|
|
|
Post by silverchloride on Jul 10, 2021 22:56:27 GMT -5
My DDs Club regularly uses a radar gun to clock speeds. Her target speeds for a float serve are between 41 and 43 MPH. That is for a jump float serve. The question is: what kind of radar gun used: location of radar gun: etc etc: a study done of woman's jump float serve serve done in a pro league tourney in Spain: 151 players served: 2056 serves evaluated, and measured with calculations when balls angle isn't directly at speed gun. The range of speed for these jump float servers was 24.8mph to 38.5mph. It would seem that the player your referring: isn't serving at the velocity’s your quoting unless its due to the way its being measured and vice versa: I do not know, what I do not know =) But, seen it with my own eyes, perhaps I just do not know what I am looking at. |
|
|
|
Post by justahick on Jul 10, 2021 22:58:03 GMT -5
A very interesting little study by you! A couple questions: brand of speed gun used? Placement of speed gun on court, height off of ground, distance from server, etc, etc.. Your math kph to mph: you reported: range of speeds from study that you calculated the mph from kph: on standing and jump, flost serve top kph reported was 61 kph per your quote: which is 37.9 mph: but you report different numbers per my memory: You put the height of throwing machine at release point of 7’5” ? Yes I have no idea why these things fascinate me. Bushnell radar gun. Release @ 7.5 feet. I converted kpm to mph but I did round. The ball generally has reached its fastest point as it crosses the net. As it begins its descent, gravity starts slowing the ball. So the radar gun is to be pointed at the top of the net, on the receiving end of the court at the service line. The ball must be traveling directly toward the radar gun and the ball has to be measured as it crosses the net. Radar guns are very simple, and cheap devices, but used incorrectly, you don't get any sort of accurate result. Like taking your temp by sticking the thermometer in your belly button. One gun isn't going to read much different than the other. What got me going on this is the girl's dad said she needed to try to pass 40 mph serves. I said "fair enough let's do this!" Well I played around quite a while with the darn machine and I could get them to 40 mph easy peasy, but nothing that would stay on the court, even if they barely cleared the net. That alerted me "something's not adding up here". But when you look at the actual dimensions of the court, the MPH speed of the ball, and the very limited amount of time it has to drop to the floor, it becomes more easy to see why a 40 mph float in the women's game is almost impossible. 1. The net height is 88 inches 2. Let's assume a hard float clears the net by 12 inches. So the ball is 100 inches in the air. 3. A ball served at 40 mph is traveling 704 inches per second. 4. There are 354 inches to work with once the ball crosses the net, though slightly more if served at an angle to the corners. 5. The ball must fall 100 inches in half a second @ 40 mph. 6. Gravity would accomplish this if the ball was simply dropping, as the rate of gravity is 386 inches per second. 7. The ball is overcoming simple gravity briefly, before it begins descension. But with the 40 mph velocity, the ball now only has 1/4 of a second to hit the floor with no spin, and that's asking a lot. 8. At 40 mph with no top spin, the ball simply runs out of real estate before it falls to the floor. Now, one could experiment and try to release the ball 10 feet back from the serve line, in hopes that the ball begins its descent slightly before reaching the net, but I would think the success percentage of this would be very low. Of course, there are the "how fast can you reasonably serve" scenarios with a radar gun, and then "how hard can I serve and not get put on the bench" questions in actual games. Serves in actual games are generally going to be throttled back considerably, as it is more important to put a ball in play than to try to score a point with the serve. I think this is why, in actual competition, you see the averages in the low to mid 30s mph. So the next time someone says "Well Suzy is jump floating at 45 mph!". You need to say "Show me". Maximum velocity will be at the moment of contact. From that point on, the ball will be decelerating. Doesn't change the math much, but it does likely give room for a few more mph. |
|
|
|
Post by silverchloride on Jul 10, 2021 22:59:59 GMT -5
Just as a caveat, men serve much faster, and still get in the court, so it must be possible =) Player Speed 1. Wilfredo Leon 134 km/h (83.26 mph) 2. Ivan Zaytsev 134 km/h (83.26 mph) 3. Matey Kaziyski 132.9 km/h (82.58 mph) 4. Ivan Zaytsev 130.9 km/h (81.34 mph) These are top spin serves that have downward velocity at contact. I am fully aware thank you =) |
|
