EAC Won't Set Until Well Into Flight

[Akilez]

When I go thru a startup procedure I can never get the EAC to set (switch bounces up then reverts to off). It will always be the only thing in alarm on the panel prior to takeoff and I've just become accustomed to it.

 

The only way I can eventually get it to take is to keep trying it after several minutes of flight and at some point it will stay engaged.

 

Anyone else experience this or have any ideas what may be causing it?

 

Cheers,

[sobek]

You are not waiting for full alignment of the INU. Activating the EGI is only possible with a fully aligned INU, so your attempts to engage it are rejected.

[MTFDarkEagle]

You must let your navigation system fully allign before you can.

 

On the CDU: make sure the allignment says: T=4.0 0.8 and above INS NAV READY is flashing before you press the NAV button!

 

*Sniped :D Must type faster..

[Raven68]

When I go thru a startup procedure I can never get the EAC to set (switch bounces up then reverts to off). It will always be the only thing in alarm on the panel prior to takeoff and I've just become accustomed to it.

 

The only way I can eventually get it to take is to keep trying it after several minutes of flight and at some point it will stay engaged.

 

Anyone else experience this or have any ideas what may be causing it?

 

Cheers,

 

Check this thread out also. I had issues early on and this discussion helped. It will touch on whats already been discussed here so far.

 

http://forums.eagle.ru/showthread.php?t=69726&highlight=EAC+INS :thumbup:

[delta9856]

Thanks, I have this happen to me too. It is really annoying having to wait a good 5 - 10 minutes before you can engage autopilot or use Gun-PAC!

[Quirkitized]

You must let your navigation system fully allign before you can.

 

On the CDU: make sure the allignment says: T=4.0 0.8 and above INS NAV READY is flashing before you press the NAV button!

 

*Sniped :D Must type faster..

 

This should be stickied.

[asparagin]

Thanks, I have this happen to me too. It is really annoying having to wait a good 5 - 10 minutes before you can engage autopilot or use Gun-PAC!

 

Why, you want to shoot the airport personnel?

 

I find it annoying that I have to put fuel in my car. :huh:

[Stretch]

This should be stickied.

 

It's in the FAQ, which is stickied. People just need to read the FAQ before they ask their questions.

[MTFDarkEagle]

It's in the FAQ, which is stickied. People just need to read the FAQ before they ask their questions.

^that! And: rtfm :)

[TwoLate]

This should be stickied.

 

Yes I wonder how many jump in and takeoff before the magic 4.0.0.8

[Akilez]

I was almost certain it had to be a sequencing issue....many thanks for info.

 

Does seem a touch odd that it takes that long for a modern aircraft to initialize but what do I know.

 

And just so y'all know I did search for this info before posting and didn't see anything related......my bad.

 

Cheers,

 

 

 

 

Edit: Just read the FAQ sticky and still don't see it......hmmm.

Edited April 3, 2011 by Akilez

[nemises]

Thanks, I have this happen to me too. It is really annoying having to wait a good 5 - 10 minutes before you can engage autopilot or use Gun-PAC!

 

please, for the love of god, change all missions to "start on runway" :)

[Akilez]

please, for the love of god, change all missions to "start on runway" :)

 

 

Oh no mate that will never do. Just doesn't seem proper unless the bird is cold to jump things off.

[nemises]

I was almost certain it had to be a sequencing issue....many thanks for info.

 

Does seem a touch odd that it takes that long for a modern aircraft to initialize but what do I know.

 

And just so y'all know I did search for this info before posting and didn't see anything related......my bad.

 

Cheers,

 

As I understand it, the time taken is not an electronic one (say for eg a GPS signal lock), but infact a physical one, where the inertial navigation unit gimbals have to accelerate up to HUGE rpm's in order to be sensitive and accurate enough to do their function.

It takes *edit* 4 (tks Sobek) *edit* minutes of being stationary to speed them up.

 

...you can also, if you are impatient, do an "air" alignment , which means you could taxi and take off, then align in the air...in theory this could make the INU less accurate, and it may take longer than a ground alignment.

Edited April 3, 2011 by nemises

[sobek]

I was almost certain it had to be a sequencing issue....many thanks for info.

 

Does seem a touch odd that it takes that long for a modern aircraft to initialize but what do I know.

 

And just so y'all know I did search for this info before posting and didn't see anything related......my bad.

 

The INU is a precision instrument. I cannot help but wonder how they even get it aligned in 4 minutes. And, btw. if you don't have enough stuff to do during those 4 minutes, then you're doing it wrong ;)

[=Panther=]

4 minutes on the A-10C is nothing. The F-16 has to wait 8 MINUTES!!!

[SonofEil]

please, for the love of god, change all missions to "start on runway" :)

 

NO!!

Make every mission a ramp start!

:thumbup:

[andysim]

connect the ground power, turn on the battery and Inverter, turn on Nav system. Then you can alighn while setting the aircraft up =).

[charonx]

Why not just speed up the game time while the system is aligning?

[Akilez]

Well sure enough I wasn't waiting for the CDU to display T:4.0 0.8 then flash INS Nav Ready prior to engaging the EAC. My only defense is I don't recall seeing that in the startup training but I may have just overlooked it.

 

This sim is sure good at making me feel dumb.. :doh:

 

Cheers for the help...much appreciated.

[My Fing ID]

If go through the motions about the time you're lined up on the runway and ready to take off, that switch is ready to go. What can I say, every mission is THAT important that I cannot wait... or be bothered to ask for clearance.

[nomdeplume]

If you start moving the CDU will automatically switch to NAV mode and interrupt the alignment process. You should wait until it's fully aligned before you start moving at all. It needs to be stationary. And it really doesn't take that long. By the time you've set your HUD display modes and configured weapon profiles in the DSMS it's pretty much done. I don't think I've ever used time compression in the startup phase in A-10C, unlike a certain other well-known flight sim... that took forever to frickin' align.

 

Off topic, but does anyone know how carrier-borne aircraft deal with alignment of their INS, seeing how they're never stationary? Do they always do in-flight alignments or similar?

[636_Castle]

4 minutes on the A-10C is nothing. The F-16 has to wait 8 MINUTES!!!

 

Yeah..but the F-16 has a store option, where you can implement the last known alignment if the aircraft wasn't moved, and bypass those 8 minutes. :)

 

(If you're in a hurry).

Off topic, but does anyone know how carrier-borne aircraft deal with alignment of their INS, seeing how they're never stationary? Do they always do in-flight alignments or similar?

 

Most of the time you slave the INS to the ship, and fetch the navigation data from the carrier. Or if you have an aircraft with a GPS coupled INS, you can do an inmotion align which is similar to an in flight align.

 

In flight alignments aren't recommended because they restrict you to flying straight and level, in unaccelerated flight, and give you limited/inaccurate navigation data. It's mainly for abnormal procedures.

Edited April 4, 2011 by 636_Castle

[Prophet]

There is also inflight alignment. So unless your target is super I use that.

[delta9856]

please, for the love of god, change all missions to "start on runway" :)

 

Oh no mate that will never do. Just doesn't seem proper unless the bird is cold to jump things off.

 

 

I agree, it just doesn't seem right to start on the runway. Starting the Hog up is half the fun!:thumbup: