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The first image shows the sphere just before contact. Contact is made at the start of the exposure that the 2nd image. You can see a really long streak in this image. The beginning of the streak is the ball"s place at the beginning of the exposure and the finish of the streak is the place at the end of the exposure. Unfortunately, us don"t understand the shutter speed and can"t conveniently use the streak length like us did in the still photo analysis. However we do recognize the structure rate (25 fps - PAL video) and also that 1/25th the a second passes in between the beginning of every exposure. For this reason we have the right to see that it takes three frames because that the sphere to take trip from the allude of contact with the paddle come a point just after ~ the round bounces turn off of the table. This is 1/8.333 the a second. It appears that the ball was hit while it to be a quick distance beyond Korbel"s finish of the table and that the round isn"t quite previous the end of the table in ~ the beginning of the fifth frame. So it seems that the ball has actually travelled horizonatlly about the size of the table (2.74 meters) in this time interval. However the sphere was hit through a bottom trajectory and also slightly crosscourt. Therefore I changed the 2.74 meters distance to 3.16 meter of pure distance travelled. I estimated a 30 level ball angle and increased the ball path distance by 15.47% (1/cos(angle) * distance). I provided the Excel(tm) spreadsheet to calculate an typical speed that 58.9 mph. Since this is the ball"s median speed, we have the right to be certain the round was travelling much faster at contact and also slower as it passed the sheet of the table. Us don"t, however, know just how much faster or slower. But because the mean speed is just 10 mph slower than the new world document recorded in new Zealand, it appears reasonable come guess that the ball came off Korbel"s paddle at really close to that "world record" speed. An extremely possibly, that was even faster.Method 3: analyze Sound From video Footage and "reconstruct" the event.By measure the interval between the sound the the paddle hitting the ball and also the round hitting the table, it is feasible to get very an accurate event timing. This is possible because sound recordings take countless thousands the samples every second yielding an extremely high precision. This image shows a section of the audio waveform from the Timo/Korbel clip that coincides to Korbel"s smash. You can see the the interval in between events (lower right) is .105601 seconds (1/9.47 seconds). Yet we still have actually the problem of measuring the street that the round travelled. We understand that it is somewhere near the size of a table tennis table (9 feet or 2.74 meters), however I wanted an ext precision.I determined to "reconstruct" the event in a 3D program (Lightwave) for this reason that ns could much more accurately calculation the allude of call with the paddle and the table. I created a virtual table tennis table through the dimensions of an main table. Ns made a composite picture (showing vital ball position) made from multiple photo frames indigenous the Boll/Korbel video clip together a recommendation plate. Then through trial and error, i positioned the digital camera until I had created a camera position that carefully approximated the yes, really camera"s place (which happens to be about 5 meters over the floor and around 11.5 meters earlier from the center of the table). This enables me to usage the intuitive cues indigenous the background plate to place a online ball course with a fair level of accuracy.This picture shows the reconstructed scene through the simulated ball path in place. The camera to be moved and its focal length adjusted until the table was aligned to enhance the initial setting. The slim blue lines room the outlines of the 3D aspects that have been superimposed end the 2D photo in 3D space. This is one imageimage reflecting the rendered fabricated ball streak and also table composited over the lift plate. This shows just how the digital path and visual cues the the original footage enhance up. The irradiate blue edge in the lower right it the background plate from the video clip clip and shows the streak the the ball appropriate after the bounces off of the table.And finally, just for fun, this MPEG flies the camera down roughly the table and also ends increase at about Korbel"s point of view. This doesn"t assist us calculate anything to do with the ball"s speed, yet it gives you a 3D view of what I estimated the ball"s course to be. I estimated a round distance travelled of 2.576 meters based upon this reconstruction. This functions out come an median speed that 54.5 mph. This is a tiny slower 보다 the estimate provided by technique 2. This estimate should be much more accurate due to greater precision in the timing and also because the ball path estimate should be more precise together well.Based upon part insight and also information gave by KAGIN1 top top the tabletennis.about.com forums, I produced a javascript calculator that will enable us to use some trial and also error and determine relatively accurately the ball"s velocity upon contact with the paddle, velocity upon contact with the table, and also the street the ball should have travelled throughout the provided time interval. The calculator have the right to be discovered here.After start a variety of values, I uncover that an initial ball speed of 65.973 mph (29.4929 meters/sec) yields a distance travelled of 2.576 meters, an average speed the 54.5658 mph and a rate on contact with the table the 45.65 mph (I used 10,000 iterations for the calculations). ConclusionA rate of 66 mph is an extremely consistent with Lark Brandt"s brand-new speed record of 69.9 mph. This further corroberates the id that well hit table tennis balls don"t get near 100 mph in speed. Of course, a smash vain does different from a competitive match in a number of significant ways. For instance, the ball is fight from a dead drop, so over there is no natural rebound from the ball"s inertia. It also seems likely that the radar gun will certainly be most accurate as soon as the struck ball is directed virtually directly in ~ the gun. The additional the deviation, the lower the measure up speed. For this reason the actual to win balls room going at least as rapid as the suggested speed and probably a bit faster. ~ above the various other hand, the stop contestants have the possibility to work-related on specific technique and to experiment a small bit with equipment with the details purpose that generating speed. The predictable round drop most likely helps castle dial in their technique a bit. So, Korbel shouldn"t feel poor if his quit - struck in the warm of compete - is a little bit off the note of the civilization smash record. Since the speed estimate because that this very hard hit ball from a world class table tennis player is less than 70 mph, we have the right to be pretty sure that any kind of table tennis ball most likely to be seen by a society player is travelling much slower. Yet keep in mind that at an typical speed of only 25 mph, a table tennis ball will travel the length of table in about 1/4 of a second - the approximate limit of person reaction time. 70, 60 and even 50 mph is very fast when short table tennis ranges are factored in. This, that course, explains why Boll is so far back and why players who play close come the table need an extremely quick reflexes.
My initial conclusion included a mention that Lark Brandt had actually used a paddle that was "loaded" through non-ITTF approved glue. The comment had actually the unfortunate impact of possibly suggesting that the use of non-ITTF glue could have diminished Lark Brandt"s success in some way. That was not the intent. When the usage of together a glue might provide some slight rate benefit, remainder assured that it would be really slight. This is sustained by the fact that other rivals used that an extremely same paddle and also were an extremely far turn off of the winning mark. The is further supported by at an early stage qualification rounds whereby Lark uncovered the difference in between the "glued" paddle and also his typical non-speed glued competion paddle come be about 3km/h. This difference might be quickly attributed come the fact that his normal paddle is heavier 보다 the paddle the was glued. The is quite feasible that the non-ITTF approved glue gave no benefit or also gave a disadvantage the was overshadowed by the paddle"s light weight. Either way, every competitiors had the opportunity to use comparable equipment Some also had the chance to use that very same paddle.


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