GPS Mount for CF Arms

thingiverse

After installing this mount, check out your declination at http://magnetic-declination.com/. I mark my puck with a magic marker so I never forget. To set the angle, use a simple protractor. If it's negative, turn your puck counterclockwise. If positive, turn it clockwise. Before you take flight for the first time, calibrate your compass according to the DJI instructions. It's ridiculously easy. Some multicopters just don't give you a good spot to mount the GPS puck. My S-500 is one of those and I've seen guys try to attach their pucks with makeshift lashings - no fewer than a dozen different ways, actually. The factory says poke a hole in that light plastic dome and use zip ties to secure it to the rear shell. That still lets the antenna rotate, making your calibration useless as a doorstop. We all know how critical declination alignment and compass calibration are for stable hovering, straight flight, and good old-fashioned alignment. After watching my S-500 do an impressive belly flop into a tree (yet again), I finally had enough and figured out a permanent fix. I came up with an ABS adapter that sticks to the 14mm arm using two zip ties. There's a layer of sticky tape between the adapter and the arm, keeping it perfectly vertical. The adapter reuses the original 4mm carbon fiber shaft and aluminum puck mount (it's just as light and super strong).