Good to hear from you! I'm glad you are enjoying the Sonex. Every once in a while I check out Barnstormers to see what's out there. I need to finish building my Kitfox before venturing out to other projects.
This is a mock-up of how I intend to streamline my cabane gear spring. 3D pprinted ends and aluminum flashing. Will be easy to slide out of the way for inspection and will help keep dirt out of the greased parts.
With my build, I bought a Dwyer differential pressure gauge to use as a lift reserve indicator. You add a second pitot tube angled down ~45 degrees and this gauge reads the difference between the pitot pressure and this tube. Costs ~$50. I am also working on a DIY glass screen that will have an electronic pressure sensor to give me the same info and could also sound an alarm but first I want to get the airplane flying...
I believe that the 2 uses smaller diameter tubing than the 4. I made the mistake of not going to a larger tubing when I added 12" to my rudder/vertical stab. It now flexes more than I'm happy with so I will be adding braces to the vertical stab to prevent flutter, which will add drag.
I managed to find two new flaperons for my model 4 wings that I am building. However, they don't have the horns. I would like to fabricate my own. Can anyone measure the length of the tube that slides over the tube that runs down the length of the flaperons, and also the distance from the tube to the linkage attachment hole?
I have very little welding experience but I welded up a bunch of expansion chambers a few years ago out of 20 gauge steel using a tig welder where I work. Spent half the time filling in the holes I created. When I started working on my Kitfox, I looked into using a torch welder I had at home. I didn't want to have to haul the fuselage in to work so wanted to get the gas welder going. I soon learned that the stock tip was way too big for our thin wall 4130 steel. I bought a Smith AW1A torch handle and absolutely love it. I personally find it much easier to use than a tig. Heat control is just a matter of moving the torch further or closer to the weld. The tig is much brighter, making it hard for me to see both the puddle and the adjacent seam. Regardless of what you choose, practice a bunch. Cut the welds in half to examine the penetration, and break a bunch of them. The weld itself should never break.