I also installed apm, but apm-copter-erlebrain for my F450. Does it mean this is for Quad by default ?
I've seen tri, hexa and octa, but not quad.
I also used sudo apt-get install apm-copter-erlebrain.
Not sure we have to compile these binaries, according what I've read on Erle robotics docs website
"Find below a list of the different Ardupilot (APM) binary packages we produced for you. Type the following sudo apt-get install to get any of these binaries installed and launched automatically".