Bearhawk Experimental Airplane Build : Fuel Tanks
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- Опубліковано 22 сер 2022
- Experimental airplane scratch build Bearhawk 4 place. Fabricating fuel tanks.
Build Log: bearhawk2020.blogspot.com/
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I learn something every time I watch
Great job! Thank you for taking the time to share your knowledge and talent.
Awesome job. Welding thin aluminum like that you are bound to get warping. I learned alot from this vid. Thanks
Great job on this build!
Wow, thanks a lot. Very informative. Love your channel 🤟
Beats dealing with sealant, adds very little weight
Missed cut corners very professiona work
If you welded the tanks why did you need all those rivets? Would it be enough to have just enough to hold the shape prior to welding?
I did not see ports in baffles.
I have welded alum tanks before and while I admire your skills and attention to details, I dont think you did it correctly. The most disturbing part is the flange bending @90 degrees. Aluminum should never be bent in the non annealed state. It is too hard and will result in stress cracks resulting in fuel sweating on the walls of the tank I would even avoid bending the long sides. This is not a tool box drawer. All that flange business is a huge waste of time. You can butt weld all the sections, tack them and weld them. Regarding the baffles they can be fillet welded top and bottom first, no need for flanges. Lastly your holes for fuel circulations at the bottom are too small to allow the fuel to travel freely in a sharp turn when the tank is low. You need circular holes at the bottom of the baffle to avoid sucking air on a sharp banking motion. You want as much fuel as possible near the suction tube. I admire your craftmanship, but I can assure you we dont weld alum tanks like that. You also need to remove the oxide before welding with a chemical etching solution. I can hear you IF struggling to break the oxide layer. Way too loud. Alumine oxide is the reason you are getting the pin holes. Add a 1 percent helium in your argon, it will weld a lot better. Stay safe and busy. Regards from France.