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  1. SWComposites

    Air India 787 crashes on take off

    wrong. was GE engines.
  2. SWComposites

    Titan sub noise heard on board support ship.

    since cats haven't knocked everything off the Earth by now, then the Earth is not flat. QED.
  3. SWComposites

    Norwegian ship runs aground nearly demolishes house

    the lesson here is don't order an entire boat load of stuff from Amazon Prime.
  4. SWComposites

    Bayesian interim report

    yep, giant mast + no keel + big wind = unstable boat.
  5. SWComposites

    Carbon River Fairfax Bridge - Closed

    https://web.archive.org/web/20250423030416/https://www.seattletimes.com/seattle-news/key-bridge-to-mount-rainier-starting-to-buckle-closes-indefinitely/
  6. SWComposites

    Helicopter crash Hudson River

    Those gearboxes have very high fatigue loadings, for a large number of cycles. Fatigue can be hard to predict. and as a result they require lots of maintenance, which can be expensive. Everything on an aircraft, and even more so on a helicopter/VTOL vehicle, is very weight critical. (wind...
  7. SWComposites

    Toronto place crash

    nonsense. no one is going to disassemble a wing spar or a major rib for inspection. one would have to remove an entire wing skin. go back and look at the wing manufacturing video and screen shots posted way above.
  8. SWComposites

    NTSB Recommends 68 Bridges in US be Evaluated for Risk of Collapse from Vessel Strike

    If a ship is deliberately going to crash into a bridge, can a tug stop them?
  9. SWComposites

    Semi Hauling Excavator Hits Bridge over I-10 in New Mexico

    ah, no. many states have lower speed limits for trucks, including CA. though it seems those lower truck speed limits are often not enforced.
  10. SWComposites

    Semi Hauling Excavator Hits Bridge over I-10 in New Mexico

    not really an Engineering failure.
  11. SWComposites

    Wing Stike CRJ900 LaGuardia

    there is a big difference between touching the wing tip on the ground, and slamming an aircraft into the runway, breaking the landing gear and driving the wing into the ground.
  12. SWComposites

    AA jet and Military helicopter collide over Potomac

    what is insane is keeping Reagan National AP open. It should have been closed long ago, and the Congress critters should have to trek out to Dulles (which is the only reason it hasn't been closed).
  13. SWComposites

    Golden Eagle Express Gondola Crash – Kicking Horse, BC

    Right at the site of max tensile stress. Hmmm……
  14. SWComposites

    Wind turbine collapse in Victoria, Australia

    Yep, towers are steel. The blades are fiberglass composite.
  15. SWComposites

    Toronto place crash

    This is the MLG configuration, it folds inwards, with all of it mounted aft of the wing rear spar: the fore-aft beam shown above is just outboard of the trunnion, which mounts in bearings in the rear spar and aux spar/fitting (grey in image below). this is the wing box internal structure from...
  16. SWComposites

    Toronto place crash

    Sym, I'm quite familiar with wing structures, but I have no idea what you are trying to show with the pink and green lines.
  17. SWComposites

    Toronto place crash

    787 was tested to ultimate loads (limit * 1.5), plus I think a bit more. Composites essentially do not “yield”, the stress-strain response is generally linear to failure. Bearing stress-displacement can be non-linear.
  18. SWComposites

    Toronto place crash

    that photo does not show the entire assembly. among other things, the entire wing skins are not yet installed. yes, transport aircraft wings are designed for loads way beyond what a normal flight would see. 787 wing ultimate static test...
  19. SWComposites

    Toronto place crash

    So what is the point of all this? The airplane hit the ground very hard, then the wing hit the ground, and it broke. Well duh. Wings are NOT sized to sustain an impact with the ground. Period. Maybe we need to wait for the detailed NTSB/TSB report.
  20. SWComposites

    KC-46 cracks

    This is odd for a new aircraft. My first wild guess is that some joint shims were not installed and fasteners pulled together the gap causing cracking.

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