Q330
Topic Author
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A330 Cockpit... What's This?

Wed Apr 21, 2004 5:44 pm

Does anyone know what the small object is on the centre beam of the windscreen in the A330's cockpit? It appears to be two red LEDs with a little white thing in between, but I'm not sure what it's for. These photos show it clearly:


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Photo © Brenden
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Photo © Tim Feise - APO Photos



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Photo © Bart Noëth
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Photo © SPM



Thanks in advance!

-Q

Long live the A330!
 
fritzi
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 6:15 pm

They are not LEDs. They are visual cues that help the pilots adjust their seats properly.

Please correct me if I am wrong, but I think that you should be able to see the white ball a bit above the red one. If you can, then your seat is correctly adjusted.
 
beechcraft
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 6:18 pm

hi,
i guess i could be a similar feature to what we use on the CRJ
it is used to find the optimal seat, or eye refernce, position.


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Photo © Martin Boschhuizen - AirTeamImages



the three "balls" form a triangle, with the center white ball sitting a few centimeters in front of the others.
The correct position is obtained by adjusting your seat, so that the red ball covers the white ball ( or the other way around, depending on what ball comes first).
the resulting eye level should be appr. in the center of the forward windshield.

or you just adjust your seat, so you sit comfortable...  Smile/happy/getting dizzy

hope that helps,

Denis
That's it! You people have stood in my way long enough. I'm going to clown college!
 
sabenapilot
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 6:19 pm

It is a visual aid to help you to take the correct seating position.

The trick is to adjust your seat in such a way that the white ball completely covers the read ball when you look at it, just like the moon covers the sun during an eclipse.

That way your eye height is perfect to allow both a good scan of the instruments as well as an optimal look on the outside world, which is especially important during low visibility landings and taxiing when longer distance visibility is reduced.

 
DeltaGuy
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 7:38 pm

They're pretty visable on the B727....

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Photo © Manas Barooah


Right on the center column between the Capt and F/O's windscreens...those little red balls you see there. Just keep adjusting the seat until you have the balls lined up.

DeltaGuy
"The cockpit, what is it?" "It's the little room in the front of the plane where the pilot sits, but that's not importan
 
Q330
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 8:39 pm

Ah, ok. Thanks for the answers everyone!

But here's another question: how come the 777 doesn't have a similar seat adjustment aid in the same place? I assume it does have something like that but where is it?


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Photo © Frans Zwart - Dutch Ops



-Q
Long live the A330!
 
Ejazz
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RE: A330 Cockpit... What's This?

Wed Apr 21, 2004 10:55 pm

Markings are on top of the rudder adjustment handle.

Cheers
Etihad Girl, You're a great way to fly.
 
yousef727
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RE: A330 Cockpit... What's This?

Thu Apr 22, 2004 3:28 am

Could you please show where the rudder adjustment handle is in the 777

thanks
Aviation all the way.......
 
DC-10Tech
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RE: A330 Cockpit... What's This?

Thu Apr 22, 2004 5:35 pm

Look in front of the yoke. You'll see it. He's talking about the pedal adjustment crank (handle is stowed). Used by short guys like myself to bring the pedals up closer to your feet.
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Q330
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RE: A330 Cockpit... What's This?

Thu Apr 22, 2004 6:07 pm

Am I missing something? How does the rudder pedal adjustment handle help with correct seat adjustment?

-Q
Long live the A330!
 
fritzi
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RE: A330 Cockpit... What's This?

Thu Apr 22, 2004 8:49 pm

The markings are on top of the rudder adjustment crank casing (white)

/fritzi

EDIT: I somehow managed to misread the above posts three times.

[Edited 2004-04-22 13:59:02]
 
airplay
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RE: A330 Cockpit... What's This?

Fri Apr 23, 2004 2:16 am

The balls are commonly referred to as "ERP" balls or Eye Reference Point balls. They give the flightcrew a means to position their eyes (not their assess) to the "design eye position" or DEP. The DEP is the established optimum point at which the pilot(s) must have his/her eyes to meet various landing criteria.

Heads-up guidance systems must be referenced to the DEP. So must other devices that the pilot must have in view while looking forward out the windscreen.

I don't know about the 777, but it seems unlikely they would chose to install the ERP balls in a place that you won't see while you are looking out the windscreen during an approach....

Is there a chance the answers regarding the 777 are wrong?

 
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Starlionblue
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RE: A330 Cockpit... What's This?

Fri Apr 23, 2004 3:18 pm

The placement lower than the windscreen will not affect how high your chair needs to go in order to get the correct "eye altitude". As I understand it, the ERPs are just there for initial adjustment, when you sit down, so they don't need to be conspicuously in your line of sight. Or maybe I'm wrong here...
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
airplay
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RE: A330 Cockpit... What's This?

Sat Apr 24, 2004 3:30 am

The placement lower than the windscreen will not affect how high your chair needs to go in order to get the correct "eye altitude".

The placement of your seat should not (and is not) dependant on the design eye position. The pilot’s seat position is based primarily on optimum reach of controls. (Rudder, control column etc.) The design eye position is associated with the placement of the pilot’s head. How can a pilot pivot his head down to reference his eyes to a cue in the panel, and then look up out of the windscreen and expect to maintain any sort of meaningful reference?

ERP balls are positioned where they are for a reason. The pilot should be able to monitor the ERP balls during an approach as he looks out the forward windscreen.
 
Toni_
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RE: A330 Cockpit... What's This?

Tue Apr 27, 2004 1:21 am

Hi guys.

Now I've never been inside a 777 cockpit before, but I expected to find those reference points balls located on same spot as on the 744.
As shown here:

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Photo © Steven Filipowicz



I viewed some 777 Flight deck shots, and the only thing I noticed was the little red spot near the standby compass.

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Photo © Andreas F. Daemmig


On other shots the spot wasn't as red as this one. Maybe because from photographer's view the alignment is quite close to desired angle???

Greetings,

Toni
 
dairbus
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RE: A330 Cockpit... What's This?

Tue Apr 27, 2004 11:47 am

Here is an excerpt from a 777 operations manual. I was not able to copy the attached diagram but the text gives you a good idea on how the adjustment procedure works.
.
Pilot Seat Adjustment

1. Adjust the seat to the upright position; sitting up straight, looking straight
ahead.

2. The control column must be in the neutral position.

3. Adjust the seat until:
  • the top of the glareshield appears as the edge of a plane, and

  • the crosshairs on the top of the rudder pedal adjustment crank housing line up with the top of the control column.


  • Regards
    "I love mankind. It's people I can't stand." - Charles Shultz
     
    Q330
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    RE: A330 Cockpit... What's This?

    Tue Apr 27, 2004 5:33 pm

    Thanks for the answer, DAirbus!

    -Q
    Long live the A330!
     
    dairbus
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    RE: A330 Cockpit... What's This?

    Wed Apr 28, 2004 11:09 am

    You are quite welcome Q. Glad to help.
    "I love mankind. It's people I can't stand." - Charles Shultz

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