Can somebody point me to the document (CAA, EASA, ICAO etc) in which aerobatics is defined as exceeding 30 deg pitch?
CAP 403 (Flying Displays) doesn't seem to define aerobatics that way except in the section on formation flying where it says..
http://www.caa.co.uk/docs/33/CAP%204...l%20events.pdf
7.6 Close formation flying is further classified into Basic, Intermediate and Advanced (Aerobatic) categories. The categories are defined as:
Basic - Gentle formation manoeuvring where the bank angle should be limited to approximately 30 degrees and the pitch angle to 30 degrees. Formation manoeuvring should be smooth and progressive.
Intermediate- snip
Advanced - snip