Batteries from: http://www.gensace.de

I made some speed measurements / test with my Stinger FPV racer quad.

4s 1550 45C Tattu + 5045 DALPROP V2 prop
- 165.19km/h (+- 6.41km/h)
- 169.59km/h (+- 6.47km/h)

4s 1800 75C Tattu + 5x4.8x3 Racerstar prop
- 179.06km/h (+- 4.63km/h)
- 176.37km/h (+- 3.88km/h)
- 178.81km/h (+- 6.28km/h)

4s 1550 45C Tattu (HOT!) + RACEKRAFT 5051 props
- 204.82km/h (+- 4.23km/h)
- 204.88km/h (+- 4.20km/h)
- 183.15km/h (+- 4.13km/h)

So we clearly got OVER 200km/h mark! Measurements were conducted with help of my friend on Faculty of mech. Eng. with some advanced FFT frequency shift technique. Some results were double checked with DVR frames vs distance and the results are within 1-3km/h accurate. :)

https://www.youtube.com/watch?v=u5A28Vf3Gjw