Well aircraft vibrate like crap and use rigid aluminum lines at 1800 psi and stainless in the 3000+ psi range in a non moving environment, its all about the types of bends and the support it needs. Most lines need support if they are like 2 feet long, depending on the diameter. I went with stainless .080 wall tubing for my oil pickup, my fuel lines will .035, 321 stainless with JIC flares. Tim


Some interesting reading for those of you who can read this dry stuff. https://www.faa.gov/regulations_policies...083-30_Ch07.pdf