From In-flight propulsion system test got brilliant idea how to compare different propellers in flight. The site Shrediquette - the award-winning multirotors by William Thielicke is interesting and contains a lot of info about different self built drones. The guy seems to be from Bremen, Germany.

Great 3 parts serie Side Force Generators (SFGs) in FPV Racing, Part 2/3: Side force generators - Forces and turning, can’t find part three.

Read Some thoughts on FPV camera tilt compensation and Explanation video: FPV camera tilt compensation.

Bowsed paper Yaw/Heading optimization by drift elimination on MEMS gyroscope.