Originally Posted by
docfly
Faa rule is 400 feet anywhere. Ama rule added a comma years ago to change the interpretation to 400 feet within 5 miles of an airport. Difficult to fly a turbine under 400 feet . It takes a deliberate attempt to do a loop under 400 feet. I know, I fly with telemetry.
The FAA never had a rule, they had an advisory of 400 feet. The same applied to flying near airports, it was not against the law or regulations to fly RC near an airport, but a voluntary advisory not to do so. Now it is against the law to fly near airports. Nevermind it was never a big problem.