Aircraft store ejector system
An aircraft store ejector systems and subsystems thereof. Embodiments can include a two-reservoir re-pressurization system wherein a remote reservoir is used to maintain desired pressure in a local ejector reservoir. The system can include a release valve having a vent valve and valve piston. The release valve can control release of pressurized gas to a pitch control valve. The pitch control valve can be configured to distribute the pressurized gas between two or more ejector piston assemblies. One or more of the ejector piston assemblies can include multiple concentric piston stages and piston chambers, the piston chambers configured to contain a volume of gas. The ejector piston assemblies can be configured to compress the volume of gas within the piston chambers as the piston stages are extended out from the aircraft. Such compression can provide a return force to the piston stages.
1. A pressurized gas system for an aircraft store ejector system, comprising:
an aircraft store ejector piston configured to eject an aircraft store from an aircraft;
a remote gas reservoir configured to hold a remote volume of a pressurized gas;
an ejector gas reservoir fluidly connected to the aircraft store ejector piston and configured to hold an ejector volume of a pressurized gas, wherein the remote volume is greater than the ejector volume and wherein the remote gas reservoir is arranged to supply pressurized gas to the ejector gas reservoir;
a pressure regulation arrangement comprising a pressure intensifier interposed between the remote gas reservoir and the ejector gas reservoir, wherein the pressure regulation arrangement pressure intensifier is configured to regulate a pressure of the pressurized gas supplied to the ejector gas reservoir to a desired pressure from an initial pressure lower than the desired pressure; and
a relief valve configured to selectively release pressurized gas from the ejector gas reservoir, the relief valve configured to direct released pressurized gas from the ejector reservoir to the pressure regulation arrangement.
2. The system of claim 1 , wherein the pressure regulation arrangement comprises a pressure regulator.
3. The system of claim 1 , wherein the pressure intensifier is a single-stage compressor.
4. The system of claim 1 , wherein the relief valve is configured to direct released pressurized gas from the ejector reservoir to a vent.
5. The system of claim 1 , wherein the system further comprises one or more manual valves.
6. The system of claim 1 , wherein one or more of the remote reservoir and the ejector reservoir are configured to be charged while the aircraft is on the ground.
7. The system of claim 1 , wherein the remote reservoir comprises a pressure control member and an actuating member, the actuating member configured to actuate the pressure control member, the pressure control member configured to modify the pressure of the gas within the remote reservoir.
8. The system of claim 7 , wherein the pressure control member is a plunger configured to reduce the volume of the remote reservoir when moved in a first direction and to increase the volume of the remote reservoir when moved in a second direction.
9. The system of claim 7 , wherein the actuating member is controlled by a person inside or outside the aircraft.
10. The system of claim 7 , wherein the actuating member is controlled by a sensor or other mechanism within or without the aircraft.
11. The system of claim 1 , wherein the ejector gas reservoir is configured to introduce pressurized gas to the aircraft store ejector piston without passing the pressurized gas through the intensifier.