Soft Walls - Modifying Flight Control Systems to Limit
the Flight Space of Commercial Aircraft

Edward A. Lee

Technical Memorandum UCB/ERL M001/31
University of California,
Berkeley, CA 94720, September 15, 2001.

[PDF]

ABSTRACT

Many things changed on September 11, 2001. Among them, civilian aircraft became potential enemy weapons systems, and air traffic control changed from a civilian problem to a military one. This working document describes a technological response that is practical and implementable and goes a long way towards ameliorating the risk of a repeat.

This is a working document in early stages; it contains several unanswered questions.