zanl188
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Painting While On Jacks?

Fri Jul 27, 2007 8:16 am

What's the advantage of painting while on jacks?


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MD11Engineer
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RE: Painting While On Jacks?

Fri Jul 27, 2007 8:21 am

No mess in the wheel wells?

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TheJoe
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RE: Painting While On Jacks?

Fri Jul 27, 2007 11:07 am

Maybe you could ensure the aircraft is in a certain spot to allow a more automated process and also to ensure that it does not move around during painting. You'd be surprised at how much an aeroplane can move around when it's empty and you walk up up and down the cabin... We will often put the tail jack in when we have an aeroplane "docked" to stop it from moving around and hitting stands. Other than that, I can't think of anything else...
 
L-188
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RE: Painting While On Jacks?

Fri Jul 27, 2007 11:49 am

Quoting TheJoe (Reply 2):
Maybe you could ensure the aircraft is in a certain spot to allow a more automated process and also to ensure that it does not move around during painting. You'd be surprised at how much an aeroplane can move around when it's empty and you walk up up and down the cabin... We will often put the tail jack in when we have an aeroplane "docked" to stop it from moving around and hitting stands. Other than that, I can't think of anything else...

Probably a big part of that, I can see that being an issue with automatic (robot) painting systems. If it is prgramed for a part of an airplane to be in a particular place it doesn't help if that part is in a different spot because one of the struts is a little low.

Also you can paint the entire underbelly in one shot, so you don't have to worry about different color registrations on the gear door panels.

And there is probably less taping involved.


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AirframeAS
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RE: Painting While On Jacks?

Fri Jul 27, 2007 12:43 pm

How did the AS Salmon-thirty-Salmon get painted? Was it 'hand' air brushed?
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roseflyer
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RE: Painting While On Jacks?

Fri Jul 27, 2007 12:58 pm

I would assume that in order to paint the landing gear doors, the gear has to be stowed. Stowing the gear would be needed because it would be difficult to paint with the gear down.

Furthermore, paint might find its way in the wheel well if the doors are open. You might end up with paint chemicals on your hydraulic systems that are located in the wheel well, which is probably not a good idea.
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HAWK21M
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RE: Painting While On Jacks?

Fri Jul 27, 2007 4:11 pm

Access to the undersurface,Stability of the Aircraft.
As regards the pic.Where is the stablizing Jack on the B763.What are the Fuselage Jack locations.
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BAE146QT
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RE: Painting While On Jacks?

Fri Jul 27, 2007 4:20 pm

I've no doubt that there are multiple reasons (such as Rose, TheJoe and L-188 gave), but as a modeller, the very first thing that sprang to mind was "It saves you having to mask the landing gear".

[Edited 2007-07-27 09:21:16]
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zanl188
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RE: Painting While On Jacks?

Fri Jul 27, 2007 8:25 pm

Quoting TheJoe (Reply 2):
You'd be surprised at how much an aeroplane can move around when it's empty and you walk up up and down the cabin...

Good point! I've seen large (100000lbs plus) aircraft move side to side during cargo loading due to pallet motion.

Quoting L-188 (Reply 3):
Probably a big part of that, I can see that being an issue with automatic (robot) painting systems.

This particular situation looks to be using a manned spray platform. Might be an issue for the platform though....

Quoting BAe146QT (Reply 7):
but as a modeller, the very first thing that sprang to mind was "It saves you having to mask the landing gear".

Yeah but you end up masking the jacks instead....
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SFOMB67
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RE: Painting While On Jacks?

Sat Jul 28, 2007 12:57 pm

Quoting BAe146QT (Reply 7):
Where is the stablizing Jack on the B763.What are the Fuselage Jack locations.
regds

The stabilizing jack (on the nose) has obviously been removed. I don't see the nose jack pad either (should be on rt side of nose). The main jacks, covered with masking, are in the wing, L/E wing root area. Don't remember the sta #. One leg of the tail jack is visible to the right of lift, aft of the wing.
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HAWK21M
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RE: Painting While On Jacks?

Sun Jul 29, 2007 3:40 am

Quoting Sfomb67 (Reply 9):
The stabilizing jack (on the nose) has obviously been removed. I don't see the nose jack pad either (should be on rt side of nose).

Exactly why I was curious.How many Fuselage Jacks are holding the Aircraft up in the pic.

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atlamt
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RE: Painting While On Jacks?

Sun Jul 29, 2007 6:51 am

Quoting HAWK21M (Reply 10):
Exactly why I was curious.How many Fuselage Jacks are holding the Aircraft up in the pic.

There are three jacks total. Two at the wing root and one on the the tail. If you look closely at the two man lifts under the tail the stabilizing jack is behind the one on the right.
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HAWK21M
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RE: Painting While On Jacks?

Sun Jul 29, 2007 11:46 am

Compared to the B737s the Fuselage Jacks on the B767 looks more Inboard.
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MEL
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SFOMB67
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RE: Painting While On Jacks?

Sun Jul 29, 2007 12:40 pm

Yes, they are more inbd than the 737's. Haven't seen a 747 jacked for a few years, but I think their wing jacks are in the fillet area like the 767.
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Dalmd88
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RE: Painting While On Jacks?

Mon Jul 30, 2007 5:55 am

I think the main reason is the belly of the aircraft can be painted while standing on the ground. The rest of the aircraft can be painted using the stacker cranes. With the plane on the gear the belly of a 767 has to be painted off of drivable manlifts which is just more of a hassle.

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