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Long AHARS boot wait times

Postby Kahuna » Mon Jul 08, 2013 3:23 am

All our team is seeing this same behavior.
On boot, get to PDF and there is a count down from ~40 sec on ahars. Then it resets to ~2:30 seconds and we essentially have a 3 min sit and wait period for the ahars to stabilize.
This may not seem like a long time, but it is.
How do we get this number to something less than 20 seconds?
Kahuna
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Re: Long AHARS boot wait times

Postby dmaib » Mon Jul 08, 2013 9:06 pm

I see this occasionally, but I would estimate about 75% of the time it boots up in about 40 seconds.
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Re: Long AHARS boot wait times

Postby Kahuna » Mon Jul 08, 2013 9:20 pm

dmaib wrote:I see this occasionally, but I would estimate about 75% of the time it boots up in about 40 seconds.


Dave is your engine running during this boot period?
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Re: Long AHARS boot wait times

Postby GRT_Jeff » Tue Jul 16, 2013 3:22 am

The AHRS fast-alignment mode is extra sensitive to any sensor noise. It will switch to a slower alignment mode to be safe. According to Greg, you do not have to wait for the full alignment to move the plane. Only the first 10 seconds are critical.
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Re: Long AHARS boot wait times

Postby Kahuna » Tue Jul 16, 2013 9:26 am

Good to know Jeff. THanks. That helps a lot.
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Re: Long AHARS boot wait times

Postby dmaib » Fri Jul 19, 2013 2:21 am

Kahuna wrote:
dmaib wrote:I see this occasionally, but I would estimate about 75% of the time it boots up in about 40 seconds.


Dave is your engine running during this boot period?


Yes, my engine is running during the boot up time.
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