US 12,304,644 B2
Variable mode timing with divergence inhibit
Kassidy L Carson, Colorado Springs, CO (US); and Bradley Mastrolia, Colorado Springs, CO (US)
Assigned to ROCKWELL COLLINS, INC., Cedar Rapids, IA (US)
Filed by Rockwell Collins, Inc., Cedar Rapids, IA (US)
Filed on Nov. 14, 2022, as Appl. No. 17/986,745.
Prior Publication US 2024/0158089 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B64D 25/10 (2006.01); B64D 17/62 (2006.01); G01C 5/06 (2006.01); G01P 5/16 (2006.01)
CPC B64D 25/10 (2013.01) [B64D 17/62 (2013.01); G01C 5/06 (2013.01); G01P 5/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a processor, an ejection command for ejecting an ejection seat from an aircraft;
determining, by the processor, an equivalent airspeed and an equivalent altitude of the ejection seat; and
responsive to the airspeed and the altitude indicating a second mode of operation:
sending, by the processor, a command to deploy a drogue parachute;
determining, by the processor, a variable drogue severance delay; and
responsive to the variable drogue severance delay expiring, sending, by the processor, a command to sever the drogue parachute and deploy a main parachute.