NAV equipment option?

[Alpha Floor]

Hi guys!

I see from videos that the NAV receiver of the IXEG 733 is based upon this (or similar) airframe, in which as you see the NAV tuner consists exclusively of the frequency window and two dials for selecting the digits left and right of the decimal point.

However, other 737 Classics have a more "advanced" NAV tuner with two windows: AUTO (left window) and MANUAL (right window). There's a switch that toggles AUTO/MANUAL NAV tuning mode. In AUTO, the FMC is in charge of tuning the navaid and an amber bar crosses whichever frequency is in the MANUAL window. In MANUAL, the AUTO window blanks and it's the pilot who selects the appropriate frequency.

My question: Is it possible to choose between one system and the other? If not, is it planned as a future update?

I guess there's just such a VAST combination of avionics/equipments on 737 Classic out there, allowing for all of the options would take a huge amount of resources that could be invested into other more time-effective tasks such as de-bugging etc.. This thread is just "out of curiosity"

My sincere apologies if this has already been addressed.

 

BTW: Would it be possible to know the exact airframe (tail number) after which the IXEG 733 is modeled?

 

 

Edited May 9, 2016 by Alpha Floor

[Litjan]

It is not decided - and our 737 is not modeled after one particular airframe.

Jan

 

[Alpha Floor]

Roger!

Thanks Jan!

[dr_nerdrage]

Interestingly, it seems to have been modelled differently at some point in time: 

[Shifty]

On 09/05/2016 at 2:18 PM, Alpha Floor said:

 

However, other 737 Classics have a more "advanced" NAV tuner with two windows:

 

 

I wouldn't call that tuner more advanced, we operate all types at my company and that one is the worst! If you don't have GPS you loose your position all the time during an approach when in manual mode, and the FMC cries unable RNP. I much prefer the version IXEG have gone with :-).  

 

Shifty 

[Alpha Floor]

On 5/10/2016 at 8:04 PM, Shifty said:

I wouldn't call that tuner more advanced

Certainly, that's precisely why I used the quoatation marks "". At least in Spanish we use those to denote that the writer is not meaning the exact text-book definition of the word. By more "advanced" I meant, basically, more "buttons" or more "functionality" (or at least, theoretically). 

May I ask however, what do you mean exactly by "If you don't have GPS you lose your position all the time during an approach when in manual mode"? I suppose it has to do with the inability of the FMC to update its position via VOR/DMEs when you're using the manual mode, right? But if you don't have a AUTO/MANUAL option, then you're always in MANUAL, so to speak, which doesn't make the navigation more precise anyway, right?

Or is it the fact that the FMC issues annoying messages what bothers you about the "advanced" NAV tuner?

Kind regards Shifty!

[Shifty]

Ah gotcha, my bad.... yeah it does have more buttons and a DME hold option, hehe. 

Most of our 300's now have GPS for primary position updating so you rarely get the "Unable-RNP" FMC's messages on approach anymore. 

You're spot on with the inability for the aircraft to update it's position using VOR/DME when both in Manual without GPS. The other system works differently so you can tune any NAV freq but it doesn't effect the positing updating using VOR/DME. I guess it has a separate system to allow this. I could look it up in the tech manual but I'm too busy drinking beer tonight  .

 

Regards

Shifty

 

[Alpha Floor]

9 minutes ago, Shifty said:

but I'm too busy drinking beer tonight

And I don't want to distract you from the noble practice of alcohol-drinking! hahaha

Regards!

 

[Shifty]

12 hours ago, Alpha Floor said:

And I don't want to distract you from the noble practice of alcohol-drinking! hahaha

Regards!

 

Do you live in Jerez by the way? I did all my training at FTEjerez, loved the place! 

 

Shifty 

[Alpha Floor]

45 minutes ago, Shifty said:

Do you live in Jerez by the way? I did all my training at FTEjerez, loved the place! 

Yes I do!

It's a nice place to live in, for a year or two. After that it get's a bit tiring. The "Feria del Caballo" just ended last Sunday.