US 12,325,525 B2 · Graduated chute delay six mode ejection system

Abstract

A method is disclosed herein. The method includes receiving, by a processor, an ejection command for ejecting an ejection seat from an aircraft; determining, by the processor, an airspeed and an altitude of the ejection seat; responsive to the altitude of the ejection seat indicating a second mode of operation, determining, by the processor, whether the airspeed of the ejection seat is at or above a first threshold and below a second threshold; and responsive to the airspeed of the ejection seat being at or above the first threshold and below the second threshold: sending, by the processor, a command to deploy a drogue parachute; and, responsive to a first predetermined time period expiring, sending, by the processor, a command to deploy a main parachute and sever the drogue parachute based on a variable drogue severance delay.

Claims17

Dependent claims

A method, comprising:

receiving, by a processor, an ejection command for ejecting an ejection seat from an aircraft;
determining, by the processor, an airspeed and an altitude of the ejection seat;
responsive to the airspeed and the altitude indicating a first mode of operation, sending, by the processor, a command to deploy the main parachute without deploying the drogue parachute;
responsive to the altitude of the ejection seat indicating a second mode of operation, determining, by the processor, whether the airspeed of the ejection seat is at or above a first threshold and below a second threshold;
and
responsive to the airspeed of the ejection seat being at or above the first threshold and below the second threshold:
sending, by the processor, a command to deploy a drogue parachute;
and
responsive to a first predetermined time period expiring, sending, by the processor, a command to deploy a main parachute and sever the drogue parachute based on a variable drogue severance delay.

6 more elements

A system, comprising:

an ejection seat including a drogue parachute and a main parachute;
a dynamic pressure sensor;
a static pressure sensor;
a processor;
and
memory operatively coupled to the processor, the memory comprising instructions stored thereon that, when executed by the processor, cause the processor:
receive an ejection command for ejecting the ejection seat from an aircraft;
determine an airspeed and an altitude of the ejection seat;
responsive to the airspeed and the altitude indicating a first mode of operation, send a command to deploy the main parachute without deploying the drogue parachute;
responsive to the altitude of the ejection seat indicating a second mode of operation, determine whether the airspeed of the ejection seat is at or above a first threshold and below a second threshold;
and
responsive to the airspeed of the ejection seat being at or above the first threshold and below the second threshold:
send a command to deploy the drogue parachute;
and
responsive to a first predetermined time period expiring, send a command to deploy the main parachute and sever the drogue parachute based on a variable drogue severance delay.

12 more elements

An ejection seat, comprising:

a drogue parachute;
a main parachute;
a dynamic pressure sensor;
a static pressure sensor;
and
an electronic sequencer configured to:
receive an ejection command for ejecting the ejection seat from an aircraft;
determine an airspeed and an altitude of the ejection seat;
responsive to the airspeed and the altitude indicating a first mode of operation, send a command to deploy the main parachute without deploying the drogue parachute;
responsive to the altitude of the ejection seat indicating a second mode of operation, determine whether the airspeed of the ejection seat is at or above a first threshold and below a second threshold;
and
responsive to the airspeed of the ejection seat being at or above the first threshold and below the second threshold:
send a command to deploy the drogue parachute;
and
responsive to a first predetermined time period expiring, send a command to deploy the main parachute and sever the drogue parachute based on a variable drogue severance delay.

12 more elements

Dependencies are inferred from the claim text.

Graduated chute delay six mode ejection system

Life of this patent

Graduated chute delay six mode ejection system

Life of this patent

Abstract

Claims17