When downloading and compiling ArduPlane using the instructions here:
http://ardupilot.org/dev/docs/building-px4-for-linux-with-make.html#building-px4-for-linux-with-make
Everything seems to function and output just fine, except for the airspeed sensor reading which stays at a constant 63.1. Covering the pitot tube or blowing into it, 63.1. I was asking if there is a way to fix this or if the ardupilot github is causing an issue here.