EGI?

[mvsgas]

RLG INUs didn't have anything to do with CCIP. It was done as a single replacement of the mechanical INUs.

 

I'm aware thanks

[Stubbies2003]

With the introduction of GPS earlier blocks (25,30/32) were upgraded with EGI (a rack upgrade and new LRU) that incorporated INS and GPS in a single unit.

 

This has the problem that if the GPS fails, you need to change the functioning INS as well or if you wanted to reboot the GPS, you shut down the INS as well (as it was in the same unit) and had to redo the 8 minute alignment.

 

In later blocks (40/42, 50/52) the LRU's were separated to avoid the problem.

 

 

That answers that question. Both one and two box with logical reason for splitting them again.

 

 

The impression I have is that, early block 30's had RLG (perhaps a previous upgrade from mechanical), as when they got the EGI upgrade, the surplus RLG's were used to upgrade the block 40's.

 

 

Nope. The RLG was upgraded on USAF birds LONG before EGI was a thing in the AD USAF.

 

 

This is from F-16 net posts from 2004-2007, some of the info will be good, some perhaps not, YMMV.

 

 

Well you are getting the story from someone who worked on these systems for the USAF for 19 years. :)

 

I was around when the RLG INU upgrade happened and upgraded block 30 aircraft in the early 90s. Perhaps in the 92-93 time frame.

Edited September 30, 2019 by Stubbies2003

[Rainmaker]

I cannot say with 100% certainty as I didn't get a chance to work on EGI equipped F-16s but I am pretty sure EGI is a combination of the INU and the GPS receiver boxes thus replacing two boxes with one.

 

I would agree with the possibility of that...but...the -15 has had EGI since as long as I can remember and uses two INU LRUs and a filter to accomplish that.

 

I think it’s one of those semantics and I’m not sure there’s necessarily a true answer as to what constitutes it and what doesn’t. Always up for being proven otherwise though...

[Stubbies2003]

I would agree with the possibility of that...but...the -15 has had EGI since as long as I can remember and uses two INU LRUs and a filter to accomplish that.

 

 

Speaking of the semantics below you wouldn't have a two INU box solution as the INU has been a one box solution in all F-16 blocks. One would do the INS portion the other would do the GPS receiver. I worked on F-16s from 1986 to 2005 and it wasn't until close to the 2005 point that I even heard of EGI for the F-16. Now if by -15 you mean block 15 aircraft the only time I ever saw A & B models were at the beginning of my career and in FTD. They were phased out by the early 90s for the AD USAF.

 

 

I think it’s one of those semantics and I’m not sure there’s necessarily a true answer as to what constitutes it and what doesn’t. Always up for being proven otherwise though...

 

 

Ramsay covered this several posts above. Both one box and two box EGI solutions existed in the F-16.

Edited September 30, 2019 by Stubbies2003

[Rainmaker]

Too many posts to quote on the discussion, but the act of combining them seems a bit silly to me too. If you have ever been around fighters, you know they spend as much time broken as they do FMC, why the heck would you want to combine all your nav systems into one box so you can expect to lose everything if you get a complete component failure. Of course, if I had a nickel for every time I asked myself why when it comes to aircraft parts. :D

[Stubbies2003]

Too many posts to quote on the discussion, but the act of combining them seems a bit silly to me too. why the heck would you want to combine all your nav systems into one box so you can expect to lose everything if you get a complete component failure. Of course, if I had a nickel for every time I asked myself why when it comes to aircraft parts. :D

 

 

They did the exact same thing with the MMC which combined three boxes into one so sorry but the military does do this kind of thing. Ramsay's post makes perfect sense in that they broke it back apart to not lose INS due to faulty GPS though. Perfectly believable outcome.

 

 

If you have ever been around fighters, you know they spend as much time broken as they do FMC,

 

 

Not the case on the F-16s I worked on. They managed a pretty good FMC rate so "as much time broke as FMC" is, at best, anecdotal to your experience and, at worst, hyperbole. Do they break and need fixing? Sure. Every piece of military equipment will need to be fixed at some point.

[Stubbies2003]

I still wouldn't call two box solution an EGI. Maybe it's a GPS aided INS or something like that.

 

Google: embedded

/ɪmˈbɛdɪd/

adjective

1.

(of an object) fixed firmly and deeply in a surrounding mass; implanted.

 

 

Well I think at this point we are getting into the weeds of semantics. I cannot say if they kept the name EGI or reverted back to INU and GPS Receiver. At the end of the day it doesn't much matter as regardless of what it is called it does the exact same thing.

[Rainmaker]

Speaking of the semantics below you wouldn't have a two INU box solution as the INU has been a one box solution in all F-16 blocks. One would do the INS portion the other would do the GPS receiver. I worked on F-16s from 1986 to 2005 and it wasn't until close to the 2005 point that I even heard of EGI for the F-16. Now if by -15 you mean block 15 aircraft the only time I ever saw A & B models were at the beginning of my career and in FTD. They were phased out by the early 90s for the AD USAF.

 

When I say -15 I mean F-15. Sorry, the whole "block" thing is not second nature to me, my life was spent on split tails.

[Stubbies2003]

When I say -15 I mean F-15. Sorry, the whole "block" thing is not second nature to me, my life was spent on split tails.

 

 

Ah okay. Yeah I cannot speak to anything from the F-15 community. The closest I got to those was walking by them on the ramp at Luke AFB walking to the F-16 side.

[Rainmaker]

So when did the alignment time get to drop from 8 minutes to 4? If anyone knows the answer...

[mvsgas]

Ah okay. Yeah I cannot speak to anything from the F-15 community. The closest I got to those was walking by them on the ramp at Luke AFB walking to the F-16 side.

 

LOL, boss, your dating/aging your self :D What squadron where you in Luke? I started on the 310 in August of 1997 and went back to the 62 on 2009 and 310 in 2010.

[Stubbies2003]

LOL, boss, your dating/aging your self :D What squadron where you in Luke? I started on the 310 in August of 1997 and went back to the 62 on 2009 and 310 in 2010.

 

 

Well unfortunately not mentioning it and dating myself doesn't make me any younger. ;)

 

312th from 86-89, 308th and 309th from 91-96 and 21st and 63rd from 97-05.

[=Panther=]

21st and 63rd from 97-05.

 

Probably saw each other from time to time. Luke from 02-06, then Kun 06-07, Nellis 07-present.

[Stubbies2003]

Probably saw each other from time to time. Luke from 02-06, then Kun 06-07, Nellis 07-present.

 

 

Quite possible. Not exactly the largest community of peeps out there. From 2006 to 2011 I was on the CV-22 Osprey. That was my final hoorah before retirement.

[cougar56th]

INS Knob labeled incorrectly

 

The older block F-16s have the INS system. The knob for the new blocks as is modeled in DCS should be labeled as EGI. Would it be possible to get this fixed for the next update?

[mvsgas]

https://forums.eagle.ru/showpost.php?p=4051270&postcount=22