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Scale Nelitz 1/3 scale Cub build

Snoopy1

Snoopy1

640cc Uber Pimp
dhal22 said:
What silver solder please? My plumbing silver solder doesn't work. I see 5% silver on the box. I have silver soldered 10's of 1000s of copper joints with this style solder.


View attachment 108287
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Just check the solder connections very well before you put it into the plane, as solder is not a structural connection to connect steel it needs to be brazed. If I may suggest go to your local welding shop take the steel you have discuss with what you want to do and the equipment you have and he will select the correct brazing rods for your needs.
 
TonyHallo

TonyHallo

150cc
What you have is silver bearing solder, what you need is silver solder and flux. It is higher in silver content. Technically it is call silver brazing but most old timers call it silver solder, sorry for the confusion. You can buy it at the local welding supply store , your local hardware will have it as well only in a very small package. One of these could possible do the joints on the fuselage. It melts at a lower temperature than copper brazing rod and a propane torch is all you need. If the parts are heavy you want to use MAPP gas.
https://www.thefabricator.com/article/arcwelding/brazing-copper-and-copper-alloys
A little tip I learned while buying the items below is to throw the parts in a bucket of water once the silver solder solidifies and most of the flux will pop off.
IMG_2272.JPG
 
Rcermike

Rcermike

New to GSN!
dhal22 said:
It's been several days since I posted and assumed my plumbers silver solder was fine so didn't remember all of the earlier suggestions. Thanks, 56%silver it is.
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Greetings to all. I'm new to this site, but have been keeping up with this post. I finished my Cub last year and put in three or four flights. I used MAAP gas for the gear and interior frame work. The high silver content rod I used had white flux covering it which was purchased at a welding supply. It was quite expensive. Keep up the nice work.
 
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