A method for electrically initiating an inertial igniter for a munition. Alternately, the membrane is folded and wrapped against a central conduit within the membrane fold. Tilt-rotor aircraft having high aspect ratio wings can advantageously further include a controller that provides reduced RPM in a forward flight relative to hover, andor a controller that provides variable speed, as set forth in U. The IAD monitors the received signal to determine whether a type of traffic is detected which requires a different call characterization.