Hi Jack,

Thank you for the information. I will hold off on the spinner purchase since there is one in the box already.

My current plan is to go with the Extreme Flight motor, it has a 570 kv rating, and by running a 15x7 or 15x8 APCE with 5S battery around 4 to 5KmA, should be able to deliver 1+KW, which I hope is enough to fly this plane through advanced schedule. But I am new at electric, for sure not familiar with Hacker A50 12S, eventually I will consider getting a software like MotoCalc to help me figure out different setup, but for now, the EF motor/ESC is the main candidate. Any comments or suggestions?

Kevin