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aviation developments

Discussion in 'Space Technology' started by gf0012-aust, Jan 9, 2017.

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  1. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    ??

    nothing made in an autoclave is designed to survive in the temps that the autoclave uses once the pressing has been completed. Its not how autoclaves work

    its the same principle used in manufacturing components for submarines in autoclaves

    the components are designed to pass destruction tests across a range of conditions way beyond normal stress induced fighting conditions.

    the multiple and disparate physical components used to make c0ckpits underdo signifcant change when they are in the autoclave - its similar to the changes that occur when carbon fibre is formed in an autoclave
     
  2. PhysicsMan

    PhysicsMan New Member

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    Any idea how hot autoclaves get for these processes?
     
  3. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    400C for the F-22 which is a quad laminate and fusion bonded acrylic, poly and optical glass

    no idea for F-16 which is only triple laminate polycarb
     
  4. PhysicsMan

    PhysicsMan New Member

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    Thanks. Within limits for what I have in mind.
     
  5. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    bear in mind that the max temp that an SR71's c0ckpit glass reached was under the forming temp of the F-22 c0ckpit glass making autoclave

    the temps around the canopy are not universal and evenly distributed either
     
  6. PhysicsMan

    PhysicsMan New Member

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    I'm not worried about the transparent conductor layers getting exposed to high temperatures during usage - that should be fine (for optical and electrical properties as well as thermal stresses), I'm primarily concerned with the process temperatures needed to coat them. But it sounds like that should not be a major problem either.
    Thanks.
     
  7. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    optical transports react to heat, if you build comms transports into the c0ckpit laminates then you will witness adverse results
     
  8. PhysicsMan

    PhysicsMan New Member

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    They do, unfortunately, but that is a separate (or next, I should say) problem to worry about. At least one doesn't need to worry about permanent degradation of its properties.
     
  9. PhysicsMan

    PhysicsMan New Member

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    Are the optical properties (light transmission) or electrical conductivity important for the reason you mentioned?
     
  10. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    if the bearer is corrupted then the signal its managing is compromised - in that sense you do have a permanent degradation as you have an unintended consequence.

    If there is (especially) a (tactical) decision made using that compromised dataset, then there can be severe even if unintended consequences

    heat kills, no matter how benign it may seem. if the transport path suffers temp variations, then that is just as bad as an imperfectly drawn cable where the result is reflection and refraction

    optical transports won't change the outcome.
     
  11. PhysicsMan

    PhysicsMan New Member

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    I suppose using digital transmission signals is a way to make fluctuations in signal carrier properties less relevant.
     
  12. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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    the fluctuations are usually called "jitters" - not to be confused with the acronym :)
     
  13. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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  14. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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  15. John Fedup

    John Fedup Well-Known Member

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    Interesting application. Can these flying COWs really get up to 400 feet while having to lift all that cable?
     
  16. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

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  17. colay1

    colay1 New Member

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    I'd have thought a mini aerostat would offer practical advantages. Weather conditions could be an issue though.
     
  18. John Fedup

    John Fedup Well-Known Member

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