Originally Posted by tennisplayer_85
About the empirical data question. Currently the App calculates the the speed from when the ball gets hit 'till its landing location. plans are to calculate the initial serve speed in a near update using empirical data.
I am interested in the program. However, the above statement has me a little concerned.
As others have noted, I am interested in the speed at impact only, not an average.
Based on the following website, http://advancedtennis.com/results/speedloss.htm
, the ball loses an average of 27% in speed just before the bounce. Have you taken something like that into account?