This discussion attempts to predict the pattern of expected accidents and the relative safety of verticraft in relation to airplanes and helicopters. Since crashes from the same cause may be more serious in one type than another and since exposure time to engine failure varies widely, the analysis is attempted by logic rather than statistics. Potential accidents are discussed first as to possible causes and then as to probable results. Loss of control and loss of power aspects are discussed in detail.
It is hoped this philosophy will be helpful to verticraft designers, to FAA and to the military in preparing airworthiness regulations, and most of all, to those who are planning civil and military operations of verticraft.
It is intended to define equivalent safety” and final conclusions are evaluated.