Oxygen Cart and Ejection Seat Trainer Brief Summary_v2.docx

Naval Air Warfare Center Training Support Division (NAWCTSD) Aviation Structural Mechanic Safety Equipment (AME) A School Oxygen (O2) Servicing Cart and Ejection Seat Trainer Desired Specifications Summary

Prepared By:

A School IPT

Date:

December 12, 2024

Purpose: Train students in using the OXYGEN SERVICING COMPRESSED GAS TRAILER; MODEL NUMBER A/M26U-14; PART NUMBER 1SWQ1-ESS37-0001 (Publication: NAVAIR 19-5-37) to service a Seat Survival Kit SKU-10/A (Publication NAVAIR 13-1-6.3 WP 008)

Proposed solution:

1. Create a mock-up O2 servicing cart that has the same visual look of the original O2 servicing cart manufactured by Epsilon Solutions, except it can be constructed of less hardened materials as it will not require heavy 10" x 56" oxygen tanks, a heavy manifold, etc. The cart frame, tanks, front panel, tires, etc. shall have the same visual look of the actual O2 servicing cart. "For Training Purposes Only" shall be painted on the cart in various locations to distinguish it from real equipment.

2. Create a mock-up Seat Survival Kit SKU-10/A that is permanently affixed to the O2 servicing cart around location 7 above.

3. Create a mock-up O2 servicing cart that simulates replenishing the seat SKU-10/A kit in stages. The final simulated replenishment procedure may vary depending on the AME Schoolhouse final requirements, but a possible procedure is as follows:

a) Press a button to reset the system to a known good state. Optionally select an initial settings scenario from a file and then reset to that state. Choose the lowest supply tank above a stage breakpoint, ignoring any supply tanks at 200 PSI or less.

b) Complete the path, validate there is no water in the tank from the indicators, and charge up to a stage.

c) Close off the current tank and choose the next higher tank to use, complete its path and charge. Repeat until target PSI is reached.

d) Close off all paths.

Possible Simulation Components Per Trainer:

1. Controlling PC(s) or microcontroller(s)

2. Speakers

3. Button and/or monitor, keyboard, and mouse to reset scenarios

4. I/O card(s)

5. Modified top of tank valves, fitting on the mock-up tanks (callouts 9 and 10 above) that take a standard screw valve and actuate a switch. This switch actuation via a digital input will open the valve in the simulation and create a hissing noise simulating an instant charge up of the line. Quantity: 6

6. Displays for the tank pressures on the input manifold (callouts 12 above) that will move when top of tank valves are opened. Displays shall be:

(1) Mechanical reproductions of a dial face with a needle manipulated by an electric voltage, Quantity: 6;

(2) Individual miniature LCD/OLED displays (with adequate sparing to handle their unique sizes), Quantity: 6, or;

(3) Long LCD/OLED display that cover multiple gauges (with adequate sparing to handle the unique size), Quantity: 1

7. Modified control panel valves for each tank (callouts 11 above) that take a standard screw valve for this panel and actuate a switch. This switch actuation via a digital input will open the valve in the simulation and create a hissing noise simulating an instant charge up of the manifold. Quantity: 6

8. Display for the tank pressure on the input side of the mixing manifold (callout 16 above) that will move when the callout 11 valves are opened. Display can be:

(1) Mechanical reproduction of a dial face with a needle manipulated by an electric voltage, Quantity: 1;

(2) Individual LCD/OLED miniature display (with adequate sparing to handle their unique sizes), Quantity: 1 or;

(3) Part of above longer LCD/OLED display that cover multiple gauges (with adequate sparing to handle the unique size), Quantity: 1

9. Modified control panel valve for connecting the input to output manifold (callout 13 above) that will take a standard screw valve for this panel and control an analog input. This will open the valve in the simulation to the degree in which the valve is opened and create a hissing noise feedback. Quantity: 1

10. Display for the tank pressure on the output side of the mixing manifold (callout 17 above) that will move when the callout 13 valve is opened. Display can be:

(1) Mechanical reproduction of a dial face with a needle manipulated by an electric voltage, Quantity: 1;

(2) Individual miniature LCD/OLED display (with adequate sparing to handle their unique sizes), Quantity: 1, or:

(3) Part of above longer LCD/OLED display that cover multiple gauges (with adequate sparing to handle the unique size), Quantity: 1

11. A digital input and digital output to register when the air hose has been attached to the seat air bottle input.

12. Modified hose valve that will modify a standard screw valve for the hose connection and control an analog input. This will open the valve in the simulation to the degree in which the valve is opened and create a hissing noise feedback. Quantity: 1

13. Digital output to trigger the two indicators (callouts 14 and 15 above) that there is water present in the system. One indicator is a ball that flips from blue to white, and the other indicator is a "plunger circuit breaker" like pop out indicator. Possible to partially solve this with an LCD/OLED display as well. Quantity: 1-2 depending on design

14. Display for the seat oxygen valve. Display can be:

(1) Mechanical reproduction of a dial face with a needle manipulated by an electric voltage, Quantity: 1, or:

(2) Individual miniature LCD/OLED display (with adequate sparing to handle their unique sizes), Quantity: 1 Digital Inputs Summary:

· Top of Tank 1 DI

· Top of Tank 2 DI

· Top of Tank 3 DI

· Top of Tank 4 DI

· Top of Tank 5 DI

· Top of Tank 6 DI

· Tank 1 Manifold Valve DI

· Tank 2 Manifold Valve DI

· Tank 3 Manifold Valve DI

· Tank 4 Manifold Valve DI

· Tank 5 Manifold Valve DI

· Tank 6 Manifold Valve DI

· Hose Connection DI

Digital Outputs Summary:

· Hose Connection DO

· Water Present DO

Analog Inputs Summary:

· Main manifold large valve screw AI

· Hose valve AI

Analog Outputs Summary: *if not solved by using LCD/OLED displays

· Tank 1 DO

· Tank 2 DO

· Tank 3 DO

· Tank 4 DO

· Tank 5 DO

· Tank 6 DO

· Manifold In DO

· Manifold Out DO

· Seat Gauge DO

Pictures of the actual O2 Servicing Cart from Epsilon Solutions that the mock-up should resemble:

White Gauges Above Green Gauge Above Seat Gauge image2.png image3.jpeg image4.jpeg image5.jpeg image6.jpeg image1.jpeg