Building the new Bushbaby SAFARI

[Tailspin]

Boet,

The BB is welded airplane, how do you deal with rust and how does it affect the lifespan of the airplane?

Dankie,

John

Pouring raw linseed oil is the accepted standard for even the certified aircraft.

[johnsa]

Tailspin, I am learning all the time and I think a non certified aircraft should be as safe as a certified aircraft any way. Why not galvaniseren (I only know the Dutch word) it will not rust and I think the process is well know.

Johnsa

Boet,

The BB is welded airplane, how do you deal with rust and how does it affect the lifespan of the airplane?

Dankie,

John

Pouring raw linseed oil is the accepted standard for even the certified aircraft.

[Tailspin]

Raw Linceed much cheaper and easyer to get hold of i think.

I have recently redone the struts for my VP and when i cut them open they were still fine inside and they have been in a store room for over 5 years so it does work.

[johnsa]

Yes it works, but the question is would it be bettet to have galvanized and what would be the extra cost if any? Accept for the cost would there be adownsite?

[Rudix]

Yes it works, but the question is would it be bettet to have galvanized and what would be the extra cost if any? Accept for the cost would there be adownsite?

I don't think galvanizing would protect the tubes from the inside like the oil. On the outside it would do a good job but remember you have to do it after the welding for best effect, also remember that not all forms of galvanizing are equally good, "Hot dip galvanizing" works great but might not be that easy with full frame !

My Pietenpol has oil in the tubes and a good epoxy paint on the outside, will tell you in a few years how well it worked

Fly safe,
Rudi

[Boet]

My personal aerial steed is pushing 38. Good `ol paint on the outside, linseed oil on the inside. LOOK MA, NO RUST!!! Today we started packing the Bos-ot together. Upholstering nearly complete. Painting complete. BIG sky`s a waiting...

[Oupa-G]

Boet I can't wait to fetch the Bos Ott we have a problem withe second airframe the paint shop. The engine mount is finished and I will bring it this weekend on my way to Tankwa small detour.

There is a lot of talking on the mild steel. To start of the airframe is TIG welded this gives an airframe that is hermetically sealed. The prewar airframes were gas welded with a certain amount of porosity. Hence rust. Your mild steel Fridge washing machine etc are powder coated
and rust is not a problem. Abeadblasted airframe then powder coated does not get corrosion from the outside. Galvinizing electrolitic can change the cristal struture of the metal there are the famous chrome plated flying wires that snapped also even hot dip zincplating ruins the airframe you can never repair it any welding gets welds that are contaminated. Iknow that the bosvarkie will outlive me. We musn't try and fix something that isn't a problem. Just remember the french saying"better is the enemy of good"

Cheers Oupa-G

[Boet]

Well roared, oh Lion. Words of wisdom that came thru experience.

[Oupa-G]

On top of it if you hot dip the airframe it will come out of the bath like a koeksister one also has to drill a zillion holes for the zinc to go inside actually a bit of a "kak" idea.

Cheers Oupa-G

[John Young]

Ah,

The Loeriesfontein Express is added = almost complete

[johnsa]

thanks for the answer its clear now! So stick to the good old metal as long as the job is done well with knowledge and passion. Good luck Boet hope to see the maiden flight soon

Boet I can't wait to fetch the Bos Ott we have a problem withe second airframe the paint shop. The engine mount is finished and I will bring it this weekend on my way to Tankwa small detour.

There is a lot of talking on the mild steel. To start of the airframe is TIG welded this gives an airframe that is hermetically sealed. The prewar airframes were gas welded with a certain amount of porosity. Hence rust. Your mild steel Fridge washing machine etc are powder coated
and rust is not a problem. Abeadblasted airframe then powder coated does not get corrosion from the outside. Galvinizing electrolitic can change the cristal struture of the metal there are the famous chrome plated flying wires that snapped also even hot dip zincplating ruins the airframe you can never repair it any welding gets welds that are contaminated. Iknow that the bosvarkie will outlive me. We musn't try and fix something that isn't a problem. Just remember the french saying"better is the enemy of good"

Cheers Oupa-G

[Cali]

Blixim, daai kleurskema lyk mooi.

Boet jy weet wat jy doen.

[Oupa-G]

Just some more details on the engine mount after it came out of the jig it has been heat treated and now ready for the firewall forward stint and all the wiring .
More on that later as we go along enjoy the pics The welding is super.

Cheers Oupa-G

[Oupa-G]

Some more pics Ive made them smaller

Oupa-G

[Oupa-G]

Some more pics
Oupa-G