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  • Users: SteveAero
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  1. SteveAero

    Shaved CSK NAS1097 rivet strength allowables

    Hi, I know that this subject has been broached in previous posts, but I am looking for something more specific. Due to corrosion in the skin of a Boeing a/c, a blend out (from 0.071" to 0.068") was performed at joint locations. This means that the skin and NAS1097K fastener heads were shaved...
  2. SteveAero

    Shear transfer via fasteners in torsion in built-up, thin-walled, open sections

    Hi all, I am trying to find a method of fastener shear transfer between a thin-walled open U-section and skin (both are aluminium, with skin attached on both sides of the vertical walls). From the grid point force balance output from the FE model, I know what torsional moment is being carried...
  3. SteveAero

    FAR § 25.493 Equation

    Hi, FAR § 25.493 (e) states an equation to calculate the maximum nose gear reaction in a braked roll. I cannot for the life of me back-engineer this equation-and it seems so simple. If anybody could show me how to calculate it, I would be most appreciative. Here is the relevant excerpt and...
  4. SteveAero

    Rule of thumb: Numbers of Doublers i

    Hi, Is there a general "rule of thumb" that addresses the amount of doubler repairs that are allowed on a fuselage skin, specifically for FAR23 a/c? Something like a density requirement. I know that some OEMs (FAR25) mandate a full stringer frame bay surrounding a 'significant' dent must be...
  5. SteveAero

    Antenna installation stress issues

    Hi, This is a follow on to thread2-122412. I am installing a SATCOM antenna on the top fuselage of a pressurized commercial jet. I am relatively new to this field, and have the following questions that I hope the experts can advise me on: 1. The doubler used to reinforce the skin, shown in...

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