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  1. johnchance

    Bathtub Fitting Analysis: Fokker vs Lockheed 88a

    I would also appreciate the Bombardier information. My email is mark1@kendra.com Thanks
  2. johnchance

    Windtunnel for calibration

    Hi es335, Is the tunnel recirculating or pass through? If pass-through, you will want your drive section downstream of the test-section. If recirculating you may want to put baffles in the corners downstream of the drive section to smooth out the flow. I would put the filter and...
  3. johnchance

    Designing a fuselage repair to 15 ksi

    Koopas, Hoop and axial tension acting alone might be the critical load case for your panel if there were no additional out of plane bending, or in plane shear forces acting on the panel. The walls of a cylindrical pressure vessel, far from the endcaps, approaches this condition. I imagine one...
  4. johnchance

    Landing gear calculation

    Kaip, In order to get help with your problem, you will need to provide more information. What safety matters are you specifically interested in handling? If you are concerned about landing safely, for instance, it will also be helpful to know how heavy the aircraft is and what the landing gear...
  5. johnchance

    part 23 emergency landing load factors

    Miper, Your description of the reason for the increased emergency landing loads makes it clear. It is the 1.5% climb gradient the FAA is concerned about. Since the aircraft I am working on is a twin turbo, 23.67(a) does not apply to me, 23.67(b) does. 23.67(b) doesn't allow any exceptions, the...
  6. johnchance

    part 23 emergency landing load factors

    I am confused about emergency landing static inertia load factors. My confusion centers on FAR paragraph 23.562(d)(1), which I read to require a fairly large increase in the 23.561 load factors for those airplanes that weigh less than 6,000 LB, Vso>61.0 kts, that do not comply with 23.67(a)(1)...
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