KDS INNOVA 550 is a supperior helicopter. I am using hobbywing 150-220A ESC and the stock motor of KDS for this helicopter 5052-1200 KV
with zippy 6s 40-50C. Pitch max - 16 deg. Most powerful machine.
It goes stable 213 km/h streight horizontal flight no prior dive and have extreme power/weight performance. Speed was measured using GPS sports software on my android mobile phone I attached to helicopter.