Static Port
I am not a pilot but working in the aerospace industry.
I read that some airplanes have alternative static port/source in an unpressurized part of the cabin, and that the instruments could be switched to read from this.
If this is good enough, why are external static ports (on fuselage, tubes etc) required, esp since they can ice up?
If this is not good enough, why not? I would like to understand the difference in physics behind having the port internal and external.
Thanks alot!