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PostPosted: Sun Mar 23, 2008 7:52 pm
by uscgairdale

I'm sure it's just fine. I know that Shannon has done the same thing with good results too. I was just throwing you a friendly jab.


PostPosted: Mon Mar 24, 2008 11:14 am
by lazairiii

NO offense taken. I know it's been addressed before, but really, the slight bevel isn't enough to do any damage anyway, but is super streamline and rigid.


PostPosted: Tue Mar 25, 2008 4:13 pm
by russell
George, what is the type and thickness of the aluminum you used?


PostPosted: Tue Mar 25, 2008 5:53 pm
by lazairiii

2024 T-3 .025

PostPosted: Wed Mar 26, 2008 7:06 am
by russell
They do give the wings a finished look. Thanks

PostPosted: Wed Mar 26, 2008 7:10 am
by russell
Oh George, one more thing. Are there any concerns about placing a rivet through the filament tape which is around the rib?

PostPosted: Wed Mar 26, 2008 10:48 am
by lazairiii
All I can say about that is, use a new drill bit and it will not shread the tape, or you can just watch and avoid the tape altogether.

PostPosted: Wed Mar 26, 2008 9:43 pm
by Shannon
Don't worry about the underlying rib tapes Russell. I used (and George) Celus brand Alum/Alum (Alum mandrel / Alum stem) A/A44D rivets on a 3" spacing ( Split the difference where needed on rivet placement, drill your holes and just roll with it. Use Cleco's to hold your new strips in place as you go. If you are concerned about using the infamous "bevel down" factory strips just have somebody with a shear, try Carlson Aircraft, ( cut you some 7/8" flat strips out of .020 (factory capstrip thickness) or .025". To me bevel-up strips make the wings ugly (my opinion), hard to keep clean, and hard to wipe off dew from.

Long long long before Ultraflight came up with "their" rendition of capstrips (beveled) they (flat strips) were being utilized here to keep the covering down. I know it may seem totally and absolutely absurd but we always placed capstrips on ALL ribs both top and bottom on ALL ribs. In the long run what you are doing is stabilizing-reinforcing the expensive covering you so lovingly applied. The capstrips help to take the load (pull from shrinking, vibration, and wind) off the leading and trailing edge double sided and perimeter capping tapes. Of course things are bright and cheerful when all your tapes (foam, double sided, seam-perimeter) and covering are new. Some dorks even actually think capstrips are a total waste of time... Haa Haa. In their defense I'll say that looking at spanking new covering and tapes there is hardly any way you could imagine everything (tapes or acrylic glue rather) rotting and being infected with UV damage. Over time the foam tape will turn to a dark yellow-orange and loose adhesion. Over time the double sided tedlar attachment tape will yellow and degrade. This is point where the Tedlar comes unstuck from the ribs and wrinkles appear in formerly "tight" covering. All the "load" then is placed on your yellowing double sided and perimeter tape. Low and behold your flying along and all the tapes let go... Oh SH*T, my covering is ballooning and coming loose I should have listened to that guys (what was his name ?) good advice !

Before you place capstrips (bevel down, up or flat) it's a good idea to place a narrow run of Tedlar tape (1-1/4-1-1/2" wide) underneath. All Lazairs here (Series II, Several Several III's, Elite, and II) had "bevel down" factory strips installed and had no problems. After an underlying run of narrow (1-1/4-1-1/2") Tedlar tape is placed put a run of 3M silver tape ( over the narrow tedlar tape "strips" on each rib and your foam tape will not degrade much over time from UV damage.

Remember guys TIME and UV are your enemies. You put on a nice covering job and you are expecting it to last a long time. Take a few simple steps and your covering job will last long term.

Pic below is the consequences of not having taken any steps to protect the foam rib tapes from UV. Note the deep Orange/Yellow color of the UV infected double sided foam tape.

Also note the bird nest directly adjacent to the R-4 rib.

PostPosted: Wed Mar 26, 2008 10:41 pm
by Shannon
To protect the foam tape on your box sections or other areas you could use 5-8 year life outdoor vinyl graphics roll striping. This is the same stuff that is used to make decals and graphics for a myriad of vehicles (Boats, Cars, Trucks RV's, ext..)

Note: When you put on outdoor vinyl tape it is normal to have large amounts of bubbles. After a period the bubbles settle out and the vinyl lays nice flat and smooth.

PostPosted: Thu Mar 27, 2008 6:27 am
by lazairiii
Guys, Shannon is absolutely right. Shannon is the reason I have them on my plane. I'm very glad I listened to his suggestion to put them on. I have to say that not only do they do what they are designed to do, there is one additional benefit, and that is peace of mind. What's that worth to you?