That’s the woodwork done

 Acroduster  Comments Off on That’s the woodwork done
Sep 232019

The weekend has come and gone, I have a few more days leave, so lets continue to add more stringers. Bottom is done, one more side to do. I tried 2 different methods of supporting the stringers. At the bottom the more scale version, but it is a bit flimsy. The method used for the sides works better. But, since no one will see it afterwards, and since it is still strong enough, I will leave it as is. This is the end of this chapter, next I might do the stabilizer/elevator section. Did I say already that the designer specifies aluminum-tubing for this? I had the wood, and I thought this makes it look a lot more like a proper plane! It’s an experimental class plane, you are allowed to deviate from the plans!

bottom and left side

For the brazing I have settled on a 0.7mm canule, it gives me the best results (for now). Start with a bit of propane, bottle valve opened less then 5 mm on the clock face, orange valve opened to get the 1.5″ flame. Then add a bit of O2 to get it nice and hot. The flame should just be nice and blue. For the bigger jobs, you need to increase the propane a bit, but I’ve never needed more than a 5 cm flame. Most joints take around a second or 2 max to complete. As always when playing with gas and flames, you are responsible for not burning down your house!

start with a 1.5″ propane flame..
..and add some O2 to make it nice and hot.

Stringers and other bits

 Acroduster  Comments Off on Stringers and other bits
Sep 162019

This is where loads of fun can be had. To the naked eye, adding a few stringers should be a 10 min job. Yes, sure, but if I can stretch it for a few days? First I added the round formers from firewall aft. They all have the same radius as the firewall, so that makes life a bit easier.

Anyway, a good day was had, and I think I have the process worked out now. As always, let the pictures tell the story.

The bending contraption, borrowed from Thomas 😉
Difficult to see, I try to show the false formers here.
try gluing a tiny bit of metal to a 4 mm tube, when you only have 2 hands. (Note to self: don’t forget to fix the inner corner on the opposite site. )
the end result, stringer #1 done.
cockpit side
tail side, the stringers are fixed with a pop-rivet. They were also alu from what I can find. I like this better!
Even Paolo’s brazing look a mess until cleaned up, so I don’t feel too bad.
one side done..
nice job, even if I have to say so myself