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-   -   '71 Globetrotter Full Monte (https://www.airforums.com/forums/f416/71-globetrotter-full-monte-26902.html)

Aerowood 10-05-2007 08:16 PM

Different alloys of aluminum will take alodine at different rates. 6061-T6 will not take alodine very well unless the surface is machined or abraded with a scotch brite. It also requires a longer immersion time to "take color" then 2024-T3. Cut edges also will except alodine faster then the face.

Aerowood 10-06-2007 02:54 PM

3 Attachment(s)
Rt front skins and window shot on

NevadaGeo 10-08-2007 02:32 PM

Temperature comes into play also with chemicals.

Aerowood 10-09-2007 06:11 PM

3 Attachment(s)
I started on the left front corner today. The wing window was installed with sheet metal screws, so I knew this needed work. I removed the window that was installed with plumbers putty and RTV and opened up another can of worms. The second segment up skin was really dented under all the silicone and the window structure was in the way for rework, so I removed that segment in order to straighten things up. All went well, and I shoot it back on with no issues. The window on the other hand is plastic and starting to craze at the upper corners. I will need to do something about this.

HiHoAgRV 10-11-2007 07:48 PM

Man you guys are impressive craftsmen. It reminds me of my youthful trips to the EAA convention and seeing the likes of Jim Butlers Mustang 1, completely flush rivited and polished - truely a piece of art.
Keep it up!

Aerowood 10-13-2007 04:42 PM

last corner
 
2 Attachment(s)
Removed street side lwr. corner today. I also fabricated new skin and drilled it up along with the banana wrap. It was another busy day.

malett 10-13-2007 06:38 PM

Airstream or submarine ?
 
The more upkeep/repair and reading in the forums I do about airstreams,
I begin thinking more about the similarities between them and submarines.

1. You don't want any water to get in.

2. In the submarine we planned on having condensation in the hull (underbelly) so we had a way to get rid of it.

3. Galvanic corrosion was gonna happen (seawater/salt on the roads, acid rain, stray current, and dissimilar metals etc).

So this is what I'm doing :

Before we dove on the submarine we would build up a little air pressure inside the hull. If you couldn't do it you better not go under:D . Air check for leaks with bubble solution.

I'm putting vinyl soffit vents in the underbelly. You can get these in various diameters (1" to 4") they are made with a chevron grid to let air in and out, but deflect water. I made sure that the insulation in the under belly had a vapor barrier installed towards the heated area (floor). It originally did not have a vapor barrier. Secondly I made sure that the insulation stays where it belongs by utilizing the 24" insulating wires for holding it (you can purchase these at most hardware stores for holding insulation in ceilings), utilizing a wire grid where there was enough properly spaced holes in the trailer frame and were neither could be used I used contact cement on the vapor barrier and precisely cut the insulation and stuck it to the floor.

I reused the original aluminum sheets. Some had bad galvanic corrosion in the rivet hole areas. This was was due to contact with the steel frame.
I did not have the time to procure new alum. so had to place a patch across these areas so the stainless screws I was using would hold.
I just happen to have some 45" zinc strips left over from my roof.
Patches and zinc anodes in one. We shall see how this works .:whistling

Also, because stainless steel will gall very easily I used anti-seize on the screws.

I welcome the comments from the fly-boys :p

Aerowood 10-13-2007 07:01 PM

It sounds like you have the problems well taken care of.
I never though of it as a submarine, as I'm biased toward airplanes. I've been using aircraft fuel tank sealant in all the seams I've had open. It's a real mess to work with, but will be worth it in the long run when I don't have to deal with water leaks. All the hardware I'm using is aircraft. I'm spoiled on the stuff and I just can't seem to bring myself to using the hardware store stuff after using the really good stuff.

Aerowood 10-14-2007 10:04 AM

To any moderators out there: This project of mine has evolved some what further then the original post titled "Skin Corrosion" Would it be possible to change the title to "71 GT Full Monte" or would it be best to just leave it alone? Opinions anyone?

Zeppelinium 10-15-2007 09:06 PM

Yes, change it!

BTW, I'm back from two weeks on the road. Look for posts to pop up almost anywhere! :D

Zep

Aerowood 10-16-2007 07:55 AM

name change
 
With the way that my 71 Globetrotter project has evolved I had the name changed on my thread "Skin Corrosion" to "71 Globetrotter Full Monte" to better reflect the scope of the project.

Thanks
Kip

Aerowood 10-19-2007 07:25 PM

The race is on
 
1 Attachment(s)
Shot on the front skin and the street side lower corner. Two more to go, so the race is on if I can get them done or the snow flies first.

InsideOut 10-19-2007 07:34 PM

Ooops...sorry, we missed the action! Looks good though ~

Shari :flowers:

Jim & Susan 10-19-2007 09:32 PM

Same here. I can't believe I missed this thread, Kip. It's looking great!

Jim

urbanfood 10-19-2007 09:40 PM

i missed this too, great work kip. guess the name change really helped.

Aerowood 11-10-2007 07:21 PM

Another busy day
 
4 Attachment(s)
Started early today on the street side lower skin. First Pic is a before picture, notice the 6061-T6 skin splice done by a PO. On the second picture I am plugging all the 3/16th holes that the skin repair was originally installed with and re drilling them to 1/8th for now The third pic is of a frame section that was bent (and with 3/16th holes) that I straightened and then attached to the "C" channel and out rigger. The forth pic is of a frame work change on the two frames that stopped short of the wheel tub. I fabricated a new longer stringer out of .063 2024-T3. The old way left the area above the wheel well tube flimsy. I still need to make two new stub frames to go on each side of the tub up to the new stringer. The last pics show the new skin being drilled up. I still have another good day of work before it will be ready to be shot on.

Aerowood 11-10-2007 07:23 PM

Last two pics
 
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Last two pics that didn't load

Aerowood 11-17-2007 06:27 PM

ran out of daylight
 
2 Attachment(s)
Continued with the street side lwr skin replacement. I got most of it drilled up and the bulk of the trimming done. I still have to trim the forward lower section to ED. I would like to get the banana wrap made too but I think that it might have to wait until spring. I plan on shooting on everything except the lower row over the holiday weekend. I also have to fabricate the two sub frames that will go on the forward and aft sides of the wheel well tub.

Kip

Zeppelinium 11-17-2007 08:09 PM

2 Attachment(s)
Darn, you got home and got photos up before I could!

Attachment 49455Attachment 49456

Kip, always a fountain of aluminum expertise, gave me some pointers today that give me confidence I can get the floor fixed ASAP in my '77 Safari. Thanks, Aerowood!

Zep

Aerowood 12-16-2007 01:58 PM

Well I pushed the envolope, and it now looks like it will be awhile before I can finish shooting on the skin.

Kip


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