What is the 'goop' on that TekSumo

[brizrobbo]

Hi Folks,

In this episode on the TekSumo and Bonsai wings, the Josh's mention a 'goop' that they put along the leading edge to make it less brittle.

Can anyone tell me what this 'goop' actually is?

Much thanks.

 

[brizrobbo]

Don't worry...I think this is it:

http://www.eclecticproducts.com/ag_adhesives.htm

Cheers.

 

[510thousandths]

http://www.lowes.com/pd_48915-1149-...tt=goop&pl=1&currentURL=?Ntt=goop&facetInfo=

I don't know if regular silicone adhesives will do they same thing or not. If you are in the US, then you can find almost everywhere.

 

[brizrobbo]

I'm in Australia, so will have to hunt for the silicone-adhesive-goop-replacement. I have some EPP lying around, so I will be able to do some experimenting. Thanks for the tip.

 

[joshuabardwell]

Shoe Goo works great. The key characteristic is that it dries to a flexible rubber that still sticks to the surface. It keeps the EPP from getting gouged out when you crash.

 

[510thousandths]

Looking through some .au websites, I came across Selleys Shoe glue. Obviously, being on the complete otherside of the planet, I can not verify that the product is similar, but it is where I would start testing.

I think part of the magic of the Goop is that it does 2 things (not a chemical engineer, so keep that in mind)

#1 I think the toulene partially breaks down the epp foam, but not enough to cause any real harm.
#2 it fills the voids in the foam and bonds onto the partially broken down foam.

 

[brizrobbo]

A good lead...thanks. I have had some selley's shoe glue before - I actually used it for shoes would you believe.

I will report back my findings.

 

[Team_Monkey]

Just google GOOP adhesive.
GOOP is an american adhesive. It normally dissolves foam but EPP must be safe.
I use it quite a bit on my coroplast nitro powered planes. For foamies I use either Beacon Foam Tac or Beacon 3 n 1. "3 n 1" is the more liquid of the two and could be worked across a leading edge as they describe.

 

[Greenlander]

Hello!
Quick question: in the teksuma, which one is the elevator and which one is the aileron??

 

[CrashRecovery]

Both are.... It's called elevons

 

[Tench745]

Be wary with Shoe Goo. I used it to stick some nose weight in a foam plane and it ate clean through the cowling. Test on a scrap first.

 

[joshuabardwell]

Shoe Goo should be fine for EPP foam like the Teksumo. It's really good for EPP because it dries to a semi-flexible rubbery material that flexes similar to how EPP flexes. It's great for coating the front of the wings. You can thin it with a bit of toluene or xylene from the hardware store if you want to put on thin and light coats. I have also used it to attach some pool-noodle foam to a plane. Hot glue didn't work because it melted the noodle, but the Shoe Goo worked great.