What is this (part below lower EICAS)

[Hessel Oosten]

Hi All,

Please, who can tell me what is this..., see screenshot.
Part below the lower EICAS with a round hole in it.
May be nothing.., but in nothing... a hole is not needed ....

Hessel

[Matt Sheil]

Aha, during service it is used to cover the lower EICAS to avoid damage, the hole is used to pull it up after you release the DZUS locks

[Jeroen Hoppenbrouwers]

The ER models don't have the ash tray.

[Hessel Oosten]

Matt,

Thanks !

Not completely clear to me how the very small strip (when removed) can protect the much larger screen ?

Or did you mean that the now freed fasteners holes, are used for placing and fastening -another- much bigger protector plate ?

Hessel

[Hardy Heinlin]

This hole makes the aircraft lighter, hence allows extended range.


|o|

[Hessel Oosten]

H.

 

[Will]

Ha!

[Matt Sheil]

Matt,

Thanks !

Not completely clear to me how the very small strip (when removed) can protect the much larger screen ?

Or did you mean that the now freed fasteners holes, are used for placing and fastening -another- much bigger protector plate ?

Hessel

The cover part extends down below this panel, anyone with a real pedestal could remove it and take a picture to show you

[martin]

allows extended range

Let's see:

EGLL-PHNL

no hole:
TOGW_nh: 393,537,000 g
distance_nh: 6273 nm = 11,625.40563 km

with hole:
TOGW_wh = 393,536,985 g = 0.99999996188414304118799502969225 x TOGW_nh
distance_wh = (1/0.99999996188414304118799502969225) x distance_nh
= 1.0000000381158584116306120503515 x distance_nh
= 11,625.406073112314970853374810502 km
~ 11,625.40607 km

Yes! Extended Range!
Hardy corroborated again!

Required Reading:
Tucholsky, Kurt:
BRETS vorm Kopf -- Boeing 747-400 Range Extension Technical Specification
in German
or in English

Cheers,
Young Lochinvar

[Matt Sheil]

Amazing Martin.

[Hessel Oosten]

@Matt, Thanks, this give much more insight what's going on there (below the hole ..:-).

///

@ Martin, NOT so amazing as Matt wrote...

The hole has a diameter of 1 inch.

So the surface is 3,14 * 12,7 * 12,7 = 500,4506 mm2.

So the volume is 500,4506 * 1,58 mm (this is 1/16 inch thickness) = 800,191948 mm3.

The specific gravity of aluminum is 2,755 kg/liter.

So the weight of the removed (" negative hole" ....) disk is 800,191943 * 0,002755 =

2 grams !!!

You estimated  15 grams !!!

///

So....., this kind of Finnish flight-planning leads to disasters....

So....., do you homework again...

Hessel

[John H Watson]

The cover is basically a wedge shape. You only see the small edge of the wedge

http://www.iinet.net.au/~b744er@ozemail.com.au/ProtectiveCover.GIF

[Hessel Oosten]

Thanks John !
Good book you have there .... .
Hessel

[martin]

this kind of Finnish flight-planning leads to disasters....

Finnair 744s have instrument panels made from massive thick teak or ebony, with genuine brass switches and knobs.
Further, gold braided ropes for CPT and FO uniforms, and authentic Nunnery Style for cabin crew (headgear under development).



Näkemiin,
Martin

[Jeroen D]

Gotta love that nunnery style!

If it wasn't for the fact that this is a pretty serious forum, I would have thought these uniform were a hoax!

Admittedly, I haven't flown Finnair for a while. Used to frequent Helsinki years ago.

Jeroen

[martin]

If it wasn't for the fact that this is a pretty serious forum, I would have thought these uniform were a hoax!

Check out to what full URL the TinyURL resolves...

Also see what they did to the nice old livery with its merry blue colours...  :shock:
Clearly the joss stick and whalesong brigade has been at work again...

Cheers,
Martin