[&o]
can anyone help me please ,the times i read about modeller"s using baking powder
for using with superglue , do they mean bicarb of soda because i dont seem to be able to
find any other ..hope somone out there can help
Thanks all Windowman[8D]

Yep, Good old Bi-Carb Soda and thin CA. Very handy combination.

Baking powder w/ superglue? To what end?
Tnx for info - LeeH

thanks for your
swift answer Mboland i"ll try it now[8D]
Windowman...




enjoy your flying, mate.

Lee
Bi-Carb can be used as an accelerator, or a filler, but it hardens like concrete, so sanding it is a real chore.
You can dust balsa with it and add thin CA to make it a completely different material, great for around screw holes through balsa, or even ply.
Be aware that it is CA based, and therefore more brittle than resins.

Hi all
anyone able to tell me how to download or get to the free avatars
RC tell us about i"ve no idea how the heck you get to them,
hope someone can help..
thanks Windowman[&:]

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Sorry, I don't have the correct phrase book.
Could you translate please?

I use baking soda and CA all over the place. Great for filling slight gaps, making small glue fillets, and repairs where you might be missing tiny fragments of the original balsa. I also use it when I want to CA plywood to balsa by dusting the plywood and balsa where their surfaces make contact before adding the thin CA.

My understanding is that CA is slightly acidic in the bottle - that's what keeps it from setting. When it contacts anything that neutralizes the acidity then it is capable of setting (if moisture is also present). Since baking soda is a base it quickly neutralizes the acid in the CA and the gue sets rapidly. It's good to use on an some plywoods (spruce?) that are acidic and therefore resist CA.

... at leasts that's the theory as I understand it.

I can't sayI know the chemistry behind the application of CA to the baking soda but I can say this with certaincy. I have used balsa dust carefully saved from sanding and you cab use it the same way. Poofs of smoke when the CA is applied too! In a pinch you can use cigarette ashes to do the same job. Most know that ashes can be corrosive though I cannot remember if they are acidic or alkaline. Lye is alkaline so I lean that way.

I like the balsa dust best because it is pretty much the same color as the joint but when using it to fill a poor joint I just think its right.

A lot of trouble for a little balsa dust and Baking soda is far easier and cheaper ( no work involved) but all these have worked well for me.

I bet you could use micro balloons in some instances... May not be as strong... Untested

Robert