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Flap trailing edge Proseal

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william(at)gbta.net
Guest

Posted: Wed Apr 17, 2013 5:58 pm Post subject: Flap trailing edge Proseal

What are thoughts on prosealing the trailing edges  of the Flaps? I don't have the proseal (not hard to get obviously) but is it  necessary?  I have prosealed the rudder, elevators and ailerons so I'm  familiar with the process, just not sure if it's necessary. 

  

 Couldn't find anything in the archives so sorry if  this has been discussed.

  

 Bill

   [quote][b]

tsts4

Joined: 06 Aug 2007
Posts: 167
Location: Tampa, FL

Posted: Thu Apr 18, 2013 7:11 am Post subject: Re: Flap trailing edge Proseal

IMO, I'd use some kind of flexible adhesive particularly if you use Van's method to do the riveting, but it doesn't have to be Proseal.  Remember the purpose of the Proseal is to act like a Cleco, it's not there to seal anything.



If you use the method where you create a long backrivet plate out of angle iron (or something similar) that you match drill and cleco the trailing edge to, then you can probably skip the Proseal all together, but I'll defer to someone who went this route as I used Van's Proseal method.

_________________
Todd Stovall
aka "Auburntsts" on EAA and VAF
RV-10 N728TT -- Flying

rv10pro(at)gmail.com
Guest

Posted: Thu Apr 18, 2013 8:49 am Post subject: Flap trailing edge Proseal

Not to start a primer war but Proseal is a sealant and is not too good as a fastener.  The advantage of using it on the trailing edges is to act as a sealant to alkaline fluids that might wick into the "fay" seam between two skins and begin a corrosion process.  The main use (but certainly not the only) is to seal panels or antenna on commercial & military aircraft against water, cleaners, de-ice fluid and other contaminates. 



Hydrogen embrittlement and corrosion are the two concerns that drive its use in Aviation.  Corrosion takes place when the slightest electron current flow begins in the presence of moisture and dissimilar metals.  (See the Nobility Table of metals).  I won't get into Hydrogen Embrittlement here.  Remember many use the aircraft metal as the return path for those electrons.

   

It's home remedy uses are almost as varied and limitless as MMO - Marvel Mystery Oil for acronym driven builders.  Clearing stuffy noses being one of the most unforgettable.  Using it as a trace marker on formerly valuable clothing for work performed is another.

 



John Cox





On Thu, Apr 18, 2013 at 8:11 AM, tsts4 <tsts4(at)verizon.net (tsts4(at)verizon.net)> wrote:

 [quote]--> RV10-List message posted by: "tsts4" <tsts4(at)verizon.net (tsts4(at)verizon.net)>

  

 IMO, I'd use some kind of flexible adhesive particularly if you use Van's method to do the riveting, but it doesn't have to be Proseal.  Remember the purpose of the Proseal is to act like a Cleco, it's not there to seal anything.

  

 If you use the method where you create a long backrivet plate out of angle iron (or something similar) that you match drill and cleco the trailing edge to, then you can probably skip the Proseal all together, but I'll defer to someone who went this route as I used Van's Proseal method.

  

 --------

 Todd Stovall

 aka Auburntsts on EAA, AOPA, Purple Pilots, VAF, and RVairspace

 RV-10 N728TT

 Empacone, Wings, Fuse, Finishing

 www.mykitlog.com/auburntsts

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=398885#398885

 

 

 

 

 

 

 

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 [b]

tsts4

Joined: 06 Aug 2007
Posts: 167
Location: Tampa, FL

Posted: Thu Apr 18, 2013 9:55 am Post subject: Re: Flap trailing edge Proseal

Well, while what you say is true to a point, in this application Van calls for the use of ProSeal as a convenient adhesive simply to hold the parts together while riveting to prevent the dreaded trailing edge wave.  I point you to para 5H in Chapter 5 of the construction manual where Van's explains this.

_________________
Todd Stovall
aka "Auburntsts" on EAA and VAF
RV-10 N728TT -- Flying

bwestfall

Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR

Posted: Thu Apr 18, 2013 11:02 am Post subject: Flap trailing edge Proseal

Clecoing the trailing edge through every other rivet hole to a piece of

match drilled angle iron works pretty damn good at preventing the trailing

edge wave too.  Not flying but I can gaze down my rudder trailing edge with

no regrets.



Ben Westfall



--

Ron B.

Joined: 17 Feb 2009
Posts: 103
Location: Nova Scotia

Posted: Thu Apr 18, 2013 1:39 pm Post subject: Re: Flap trailing edge Proseal

On the RV-14, Van's now uses a 3M double sided tape rather than Proseal and the RV-14 wing is just an RV-10 wing shortened basically.

rene(at)felker.com
Guest

Posted: Thu Apr 18, 2013 2:29 pm Post subject: Flap trailing edge Proseal

BTW.....I liked the pro seal.....was not all that bad, ya a little messy,

but it worked for me and I knew what I was getting.  Embrace the mess....



Rene' Felker

N423CF

801-721-6080



--

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Thu Apr 18, 2013 8:02 pm Post subject: Re: Flap trailing edge Proseal

The tensile strength of Proseal is approximately 300 psi and I know it is safe to use with aluminum. The tensile strength of double sided tape varies from 10-85 psi and consist of many different adhesives. Proseal adds a lot of shear and tensile strength to a riveted joint. Assemble two scrap pieces of aluminum together with Proseal and then try pulling them apart.

_________________
Wayne G.

larkrv10(at)gmail.com
Guest

Posted: Thu Apr 18, 2013 8:38 pm Post subject: Flap trailing edge Proseal

The double sided tape would be a lot less messy way to secure the trailing edges.  Good idea.

 

Rick

#40956

Southampton, Ont

 

On Thu, Apr 18, 2013 at 5:39 PM, Ron B. <ronbelliveau(at)eastlink.ca (ronbelliveau(at)eastlink.ca)> wrote:

[quote] --> RV10-List message posted by: "Ron B." <ronbelliveau(at)eastlink.ca (ronbelliveau(at)eastlink.ca)>

 

 On the RV-14, Van's now uses a 3M double sided tape rather than Proseal and the RV-14 wing is just an RV-10 wing shortened basically.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=398911#398911

 

 

 

 

 

 

 

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 [b]

carl.froehlich(at)verizon
Guest

Posted: Fri Apr 19, 2013 4:49 am Post subject: Flap trailing edge Proseal

I don't know what the long term corrosion aspects are with tape.



I found 3M Scotch-Weld 2216 to work very well for these trailing edge jobs

as well as anything else that needed a strong epoxy that works well with

mixed materials:

http://www.aircraftspruce.com/pages/cs/epoxy_3m/3mAdhesive2216.php 



Carl



--

Ron B.

Joined: 17 Feb 2009
Posts: 103
Location: Nova Scotia

Posted: Fri Apr 19, 2013 12:48 pm Post subject: Re: Flap trailing edge Proseal

I used Pro seal on the RV-10 and have a fresh unopened can in the freezer. I also have purchased the 3M tape Van's recommends now. Pro seal was no big deal and I have not ruled out using it. I would think Pro seal would be better than the tape even though the rivets alone are supposed to do the job. The bonding is for assembly only as per Van's

Ron

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