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Using multiple cards (Read 172 times)
Oli
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Using multiple cards
Mar 28th, 2011, 2:03pm
 
Hi,

I have a question about using multiple cards - I saw this answer on a previous post:
Only the first card has  9 waypoints.Other cards have 7 waypoints.So when you are flying the leg 8-9 of the card n1 you have to load the card n2 from waypoint 1 to waypoint 7.When you are flying the leg 6-7 of the card 2 you have to load the card n3 from waypoint 8 to waypoint 5.....so on.

I checked, but the other cards have waypoints 1 to 9, so I am a bit lost on when to change cards.

Thanks for your help,

Olivier
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vololiberista
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Re: Using multiple cards
Reply #1 - Mar 29th, 2011, 3:01pm
 
It depends entirely on how many waypoints you have in total. And, on the wpt loading method you choose.

I and some others use a system that confirms CDU2 NAV operational.

Wypts 1-9 from card 1 are entered into both CDU's. when 8-9 is being tracked CDU1 is switched to 0-9. CDU2 is loaded with the next set of wypts, switched to 0-1 and then NAV. CDU1 is now loaded and then switched to 0-1 and then NAV. This system requires wypt9 (or last wypt e.g.7) to also be wypt1 of the next load card. It may seem a bit pedantic but it works and gives the crew time to check everything without rushing. Remember in the real world when this particular INS system was/is used every entry into the CDU was cross checked by every member of the cockpit crew. If you remember the incident when a Korean jet was shot down they did everything correctly except they didn't link the INS to the NAV autopilot. So the INS wasn't steering the a/c as it should have been.

The other thing to note is the distance between wypts. I for example have card 2 of 3 that finishes with wypt 7. This is because on that particular flightplan there are only 14nm between wypt7 and the theoretical wypt9 Thus wypt7 appears (as above) as wypt1 in card3 and what would have been wypts 8&9 are wypts2&3 in card 3.

Here is an example of card1 & 2:-
Code:
;ADEU Card #1 for HLLB to LIRF
1 N 32*48.3 E 019*15.6   ; RZAAM
2 N 33*32.4 E 018*43.0   ; FARUJ
3 N 34*20.0 E 018*08.0   ; OLMAX
4 N 35*12.3 E 017*28.1   ; BEKNI
5 N 35*20.2 E 017*22.0   ; LASGO
6 N 35*52.9 E 016*56.5   ; EVIRA
7 N 36*30.0 E 016*27.1   ; ASKOT
8 N 36*51.5 E 016*09.7   ; ERNAM
9 N 37*34.5 E 015*51.6   ; PIMOR

;ADEU Card #2 for HLLB to LIRF
1 N 37*34.5 E 015*51.6  ; PIMOR
2 N 38*04.6 E 015*38.7  ; RCA
3 N 38*32.9 E 015*24.4  ; PIGER
4 N 38*48.0 E 015*16.6  ; VULKA
5 N 39*05.1 E 015*07.8  ; SOBRI
6 N 39*48.5 E 014*45.1  ; AGNIS
7 N 40*00.9 E 014*38.5  ; VARAL
8 N 40*35.0 E 014*20.1  ; SOR
9 N 41*32.5 E 012*55.1  ; LAT 


vololiberista
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« Last Edit: Mar 29th, 2011, 3:05pm by vololiberista »  
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Oli
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Re: Using multiple cards
Reply #2 - Mar 29th, 2011, 3:30pm
 
Hi,

Thanks for your answser - this method makes lots of sense.
I downloaded a converter (convert2ADEU) that has an option to leave point 9 empty, this should do the trick, especially with planes equipped with only 1 INS.

Happy flying,

Olivier
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tomahawk66
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Re: Using multiple cards: is this possible
Reply #3 - Jul 4th, 2012, 7:26am
 
Hi,

I want to know if this would work in a triple INS installation.....for a flight with say 25 waypoints, create cards:

card 1: 1-9 (waypoints 1-9)
card 2: 1-9 (waypoints 9-17)
card 3: 1-9 (waypoints 17-25)

I would like to load card 1 into CDU-1 using ADEU-1 and card 2 into CDU-2 using ADEU-2, at the start of the flight. Since the last waypoint of card 1 is repeated as the first waypoint of card 2, switching over is easy using the 0-9/0-1 method. When card 2 on CDU-2 becomes active, load card 3 into CDU-1 using ADEU-1.

Thanks,

Chakko.
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« Last Edit: Jul 4th, 2012, 7:59am by tomahawk66 »  
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vololiberista
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Re: Using multiple cards
Reply #4 - Jul 4th, 2012, 9:55am
 
No you can't load card 1 into CDU1 and card 2 into CDU2. The system was never designed to do that. In the real a/c each INS unit cross checks with the other and drives separate AP's. In a triple mix system the third INS unit is if you like a judge between the other two thus increasing the tracking accuracy.
vololiberista
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OZ flyer
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Re: Using multiple cards
Reply #5 - Feb 21st, 2018, 6:14pm
 
vololiberista wrote on Jul 4th, 2012, 9:55am:
No you can't load card 1 into CDU1 and card 2 into CDU2. The system was never designed to do that. In the real a/c each INS unit cross checks with the other and drives separate AP's. In a triple mix system the third INS unit is if you like a judge between the other two thus increasing the tracking accuracy.
vololiberista


I know this is an old post, but...I do it all the time. Strange to say it cant be done. Card 1 into CDU1 and Card 2 into CDU2 then Card 3 into CDU1 etc etc.

I prefer to change waypoints in the converter files so its 1-9, then 10-18 and so on. Less cards. I just manually insert waypoint 10 into CDU1 in Pos 1 when its available. When CDU1 is on 9-1, then I go to CDU2 and insert waypoint change 0-1. Then flick the CDU2 switch and we are into the 2nd card and happy. Smiley
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« Last Edit: Feb 21st, 2018, 6:14pm by OZ flyer »  
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Marco Ravanello
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Re: Using multiple cards
Reply #6 - Feb 21st, 2018, 9:48pm
 
It can be done but a real crew would have never used such a procedure. Mainly because you're basically losing your backup navigation system.
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OZ flyer
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Re: Using multiple cards
Reply #7 - Feb 22nd, 2018, 2:10am
 
I've never had any dramas doing it. I guess I thought thats what everyone did. Grin
Although I dont understand how CDU2/3 could be a backup if it/they sits there doing nothing the whole time.

Anyway, much easier to have 18 way points loaded when home simming. Tongue Wink
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« Last Edit: Feb 22nd, 2018, 2:11am by OZ flyer »  
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Marco Ravanello
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Re: Using multiple cards
Reply #8 - Feb 22nd, 2018, 3:59pm
 
Absolutely no problem on my side Smiley
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