HiI have a 3s 4000mAh and a 4s 5000mAh Lipo battery and would like to try out how the flight time changes; but can I just swap the battery or do I have to recalibrate the four ESCs of my quadcopter to work with the other battery? thanks a lotFelix 

HiI have a quadcopter with a diy frame.I am flying in X-Mode using the Ardupirates software v1.1, Jan 24, 2011.I have GPS and magnetometer installed,the magnetometer is calibrated and I have entered the declination for my location.GPS is getting a…

HiBy now I got my quadcopter flying very nice in stable mode.I want to process now to the altitude and position hold mode and would like to know a bit more about the PID settings.Are the PID values for position hold close to the ones for stable…

HiI would need some clarification concerning the orientation of the APM for a frame flying in X-configuration, as I find contradictory information on the internet.- For X-configuration, does the APM "look" towards the left front motor or in…

HiI finally got the last few bits of my quadcopter in today's post ...Now everything is assembled and ready to go.But I would need some help / information with the following issues:- While doing the pre-flight check I realized, that I am not sure…

HiI am new to UAVs and quadcopters. I am currently working on my first quadcopter and planning the set up.I have a question concerning the balancing of the quadcopter,as I see different set-ups and possibilites;is it better to mount the ESCs around…