thanks a lot.
i'm grinding on the book and i think i will finish the book in 3 hours.
But I have something to struggle with........ the clouds and construction of a gimbal
do we really need to understand the structure of it....?
I also read the "Ace_the_Technical_Pilot_Interview"
wow, this one is quite a struggle... things are not really hard but some of the topics/ questions, occasionally, get really struggling