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Old 08-26-2013, 08:40 PM   #3
KayFactor
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Quote:
Originally Posted by Chas Tennis View Post
That reference says
...........................
"How long is the time from buttcap position to the spring forward? At most, half a second."................

Here are some Nadal forehands. We can estimate the time it takes to go from the butt cap position to impact. 240 fps
https://vimeo.com/63687035

The best way to do stop action single frame on Vimeo is to press the play pause button as fast as possible.

I count about 11 frames from the time the butt cap is pointing at the ball until impact.
t = 11 fr /240 fr/sec
t = 0.045 second.

He says < 0.5 second.

I'd say that he is off by a factor of 10X. ?

[1/2 second recorded at 240 fps takes 4 seconds when played back at 30 fps, as in the Nadal video. ]
Sorry about that I knew it happens really fast but I did not know it was that fast. Shame on me for blindly putting numbers up. From what I see on reg speed videos it looks like half a second to me. Maybe the way I see a half a second is too fast. =\

Thanks for showing me Chas
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