B 777 C.G cruise.

[Gianni1930]

B 777-200.
Please,
what do you insert, in the FMS, as cruise C.G, and why?
Thanks,to all, friends,
for explanations!!!
Gianni

[Wizofoz]

In the 200/300 (i.e without raked wingtips) there should be a de-fault cruise CG and I'm not aware of any reason to change it.

[varigflier]

We get it from dispatch and it never matches the default value.

[kijangnim]

Greetings
Dispatch gets it from engineering, and engineering gets it from downlinked data where Cruise CG features, I believe that it is needed by the FMS to compute Max and Optimum, taking into account the drag generated by the stabilizer.

[King on a Wing]

Are you guys eveny REMOTELY AWARE of the implications that the CG value has on takeoff,landing and most of all on cruise.....???
Omgg...

[kijangnim]

With such an introduction, King please go ahead I am dying to learn from you

[Gianni1930]

Thanks!!! all of you..but...
..i need moore about it!!!
we have a default number"14",and we leave that!!( the fwd limit)
"30",it could be better,and "44" much more!...but...
..how it works!?
Thanks!!!!

[Wizofoz]

Are you guys talking about cruise CG, or T/Off CG?

In our ops, %mac T/O is entered in the T/O ref page for each departure. CRUISE C/G is a default value on the Vnav Cruise page. It is usually left as is, except on the 300ER and 200LR where it is changed to a different (fixed) value due to an Aerodynamic anomoly with the raked wingtips.

I've flown Boeings for a few companies, and have never had an operation where cruise CG was supplied as part of pre-deparure information.

[oz in dxb]

There has been a discussion regards this in a previous thread guys.

http://www.pprune.org/tech-log/397235-b777-cg-30-a.html

Oz

[Gianni1930]

Thanks !!!!!