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  1. chief52

    English version of IAC (Russia) AP-25 Airworthiness Regs?

    Hi All, Does anyone have a link or other source for an English language version of Interstate Aviation Committee (IAC) AP-25 Airworthiness Regulations for Transport Category Aircraft? I understand that they are quite similar to FAR Part 25 but the devil is in the details as they say! Any...
  2. chief52

    Re-welding of 6061-T6 tube

    I have an existing equipment rack frame made from square 6061-T6 tube. We need to modify the frame geometry, so want to lengthen one tube. We intend to cut the tube between existing welded corner joints and splice in a longer tube. The rework will provide instruction to grind off all existing...
  3. chief52

    520.0 Sand Cast Aluminum Modulus of Rupture

    I am working on a bending analysis for a part made from 520.0 sand cast aluminum (T4 temper). I am having a hard time finding mechaincal strength properties for this material that will be acceptable for airworthiness certification purposes. Same for modulus of rupture curves or charts for this...

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