Opener BlackFly

Discussion in 'Hangar Flying' started by markaeric, Jul 16, 2018.

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  1. Aug 4, 2018 #501

    davidb

    davidb

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    I saw that one. Also found plenty of reference banning kites near airports. I suspect the FAA would be very strict and disallow any vehicle operations not in contact of the surface if the surface is in controlled airspace. Waivers would be very specific—no blanket waivers for below x feet.
     
  2. Aug 4, 2018 #502

    TFF

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    I agree. In the US you are either on the ground, water or in the air. There is no mixing of jurisdictions. I was told something similar from an FAA agent about OSHA. They were not there for OSHA enforcement only safety of flight. He did say they did have OSHAs phone number if the found something grossly wrong.
     
  3. Aug 4, 2018 #503

    mcrae0104

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    Accelerometers have lots of applications in cars. Think ABS, traction control, vehicle stability aids, airbag deployment sensors, etc.
     
  4. Aug 4, 2018 #504

    davidb

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  5. Aug 5, 2018 #505

    BBerson

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    R/C modelers are now caught in a four way struggle between AMA (hobbyists group), commercial drone industry, congress and FAA. Same could happen with the Ultralight rule when "vehicle" becomes "aircraft".
    Ultralights don't have much of a lobby to follow this.

    Edit, airline pilots group also.
     
  6. Aug 5, 2018 #506

    pictsidhe

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    It's my understanding that WIGs that can't get out of ground effect are not deemed aircraft. It's flying capability, not altitude.
     
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  7. Aug 5, 2018 #507

    pictsidhe

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    That's one number. Three digits.
     
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  8. Aug 5, 2018 #508

    TFF

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    The FAA defined their jurisdiction as any space above the ground. It came about because of the drones. In 2007 I went to the model airplane field multiple times a week because it looked like the hobby was going to be outlawed because of regulating airspace for drones. It still is very delicate situation for RC planes. Because WIG has no official recognition in the US. You are either flying or not. Right now you would be a test case if it came down to jurisdiction questions.
     
  9. Aug 5, 2018 #509

    davidb

    davidb

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    That’s valid reasoning but there is not yet any legal ruling on the issue per the Forbes article I linked above.

    I gather the FAA is the agency that does and will regulate “things” in the air that pose a risk to aviation safety but they are reactive. I don’t think they will proactively regulate BlackFly type vehicles. Perhaps Opener is a clever name. We’ll just have to wait and see how their hand plays out.
     
    Last edited: Aug 5, 2018
  10. Aug 5, 2018 #510

    cheapracer

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  11. Aug 5, 2018 #511

    cheapracer

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    Well Lieutenant, you got a like from Captain Pedantic.

    I'm curious, an Australian would say "one oh three", how does an American say it?
     
  12. Aug 5, 2018 #512

    mcrae0104

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    That's right, Sergeant Supercilious. It was funny. Lighten up. :)
     
  13. Aug 6, 2018 #513

    Aerowerx

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    Yes, but those are relatively recent in automotive applications. "Accelerators" have been around a lot longer. It was unclear in cheapracer's post as to which he was referring.
     
  14. Aug 6, 2018 #514

    henryk

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    -allmost all ACCELEROMETERs phisically are "G"-meters, they do not measure acceleration,
    (a=dV/dt)...

    ("accelerometers" have not speedometer!)

    g=9.81 m/s^2...
     
    Last edited: Aug 6, 2018
  15. Aug 6, 2018 #515

    radfordc

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    G is defined by acceleration
     
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  16. Aug 6, 2018 #516

    cheapracer

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    103.

    I used to think the answer to everything was 42, clearly it is 103.
     
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  17. Aug 6, 2018 #517

    Jay Kempf

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    This doesn't sound right to me. That would mean you are considering the tandem wing as one long chord. It is two trimmed wings flying in close formation. The force diagram between the two lift vectors ends up equidistant doesn't it? Which incorporates both wings and their static margins into the overall system. That would mean that the resolved lift vector for the system would be .25C of one of the wings forward of the center between the two wings...?? Seems the front wing would be grossly overloaded in the scenario you describe. Biplanes with normal stagger and overlap are not equal wings flying separated. They are rigged to make the front area not overlapped with the lower wing give up first. They normally have different AOA and sometimes different airfoils as I remember it. Apples and bananas or am I missing something?
     
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  18. Aug 6, 2018 #518

    BJC

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    The ever-going question is 103. The answer to everything remains 42.


    BJC
     
  19. Aug 6, 2018 #519

    henryk

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  20. Aug 6, 2018 #520

    Hot Wings

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    Yes, but there are also 2 pitching moments to deal with as well. Can't forget them ;)
     

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