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FSX Stop the timer!

Multipilot said:
:( These timers are killing me.....sigh....what am I doing wrong? The needle is not moving.


Thanks for your additional comments.
- In answer to vololiberista's question, "PS Have you also modelled gas masks and hypoxia?"
- I am working on it.

I have a working pressurization system and a cabin annunciator alert if the cabin altitude is above 10,000' thusfar.

The only thing stopping me now is the timer :scratchch

Regards,
John
Click to expand...

Yes, the entire system is modelled. The aircraft has a gaseous oxygen supply that runs out after four and a half hours if it is only set to therapeutic. The flow rate varies depending on whether oxygen is delivered at 40psi (therapeutic) or 80psi (emergency) However the gaseous supply is 1,850psi this goes through a reduction valve at the oxygen panel and is reduced to 350psi and then delivered at the lower pressures previously stated.
the TOWH goes off at 10,000ft allowing the crew to manually select the pax oxygen and don their masks. Otherwise in an emergency the therapeutic supply is automatically started at 14,000ft and the emergency supply at 17,000ft. The mask is clickable. If you don't click it it isn't donned so to speak. Therefore depending on the actual altitude at which the emergemcy occurs the hypoxia sets in after a set time interval.

During the pre-flight the FE carries out checks on the system to ensure delivery pressure etc. In the image you can see the supply panel and the oxygen mask therefore it has been 'donned'.
oxygen.jpg

vololiberista
 
rpmc said:
That's not quite how it works. A value of 1 isn't assigned to (L:OxygenTime_9, hours). In the Mouse click section, a value of 9 hours in advance of the current ABSOLUTE TIME is assigned to (L:OxygenTime_9, hours), and that number never changes.

The <Value> expression: (L:OxygenTime_9, hours) (P:ABSOLUTE TIME, hours) - 9 / is a two step process.

First, the elapsed time since the Oxygen Select Knob was clicked to "1" position is computed. That part is a subtraction: (L:OxygenTime_9, hours) (P:ABSOLUTE TIME, hours) - .

Second, the elapsed time is divided by 9. This ratio reflects the fraction, or percentage, of time left in the 9 hour countdown. That's the number that should drive your gauge needle.

Bob
Click to expand...

Thank you for your help, I have figured it out now.....the needle is moving. Next step is, simulating hypoxia if the oxygen is depleted.

Thanks again,
John
 
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