Hello there pedro schachtel. I am sorry for the trouble this has caused and thank you for reaching out. When forward obstacle sensing is enabled and lighting conditions are sufficient, the maximum flight attitude angle is 15° with a maximum flight speed of 6.7 mph ( 10.8 kph ). When forward obstacle sensing is disabled the maximum flight attitude angle is 15° and the maximum flight speed is 13.4 mph ( 21.6 kph ). Thank you.
The Spark is designed to be a good photo/video drone, not as a racer.
But the maximum speeds can be tweaked using DJI Assistant 1.1.2
Additonally, if you feel brave, you can use ATTI mode for real high speed fun.
See my video on how to do it: