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Posted

Maybe its just me, but i am trying to use bullseye calls with the offsetpage on the CDU.

 

I have bullseye as initialpoint on the offset page, plot in the call like 324016, everything looks good, but when i then press OSB9 to make it a waypoint, it subtracts 8 from the bearing everytime!

 

so 324016 becomes 316016

 

347030 - 339030

 

I gives me the wrong figures both on CDU and when i check on the TAD....

 

to make it correct i can add 8 to the bearing :-)

 

 

Am i doing something wrong here?

Posted (edited)

Just a shot in the dark here, but maybe correction for magnetic variance of true north.

 

*Are you sure you are getting a FULL INS align? (time reads T=4.0 0.8 INS NAV RDY flashes)

 

*Check your CDU for your Magnetic Heading (MHD) Error and see if it coincides with the change you are seeing in the Offset Page. To check, look at page 195 of the Flight Manual, this will tell you what page on the CDU to go to.

Edited by WarriorX
Further investigation.
Posted

My first guess would be as WarriorX said, but magnetic variation throughout most of the theater modeled is usually around 5 ~ 6 degrees, not 8.

 

You can view magnetic variation on several CDU pages, but one is NAV / OPTIONS / MAG. This page also shows your magnetic heading. The NAV / OPTIONS / GRID page displays your GRID heading, which is close to your heading relative to true north and should differ from your indicated magnetic heading by the amount of the magnetic variation.

Zenra

Intel i7 930 2.8GHz; ATI HD5850 1GB; 1TB Serial ATA-II; 12GB DDR3-1333; 24 x DL DVD+/-RW Drive; 800W PSU; Win7-64; TM Warthog HOTAS

Posted

Okay, thanks both of you, i will give that a check, and report back.

 

I am just wondering why magnetic variation settings isn't loaded automatically together with the flightplan?

Posted

It might be a Magnetic Heading Error creeping in to the NAV data during flight, or due to an incomplete EGI Alignment during startup.

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